FlatCAM/FlatCAMApp.py

# ###########################################################
# FlatCAM: 2D Post-processing for Manufacturing             #
# http://flatcam.org                                        #
# Author: Juan Pablo Caram (c)                              #
# Date: 2/5/2014                                            #
# MIT Licence                                               #
# ###########################################################

import urllib.request
import urllib.parse
import urllib.error
import getopt
import random
import simplejson as json
import lzma
import threading
import shutil

from stat import S_IREAD, S_IRGRP, S_IROTH
import subprocess
import ctypes

import tkinter as tk
from PyQt5 import QtPrintSupport

from contextlib import contextmanager
import gc

from xml.dom.minidom import parseString as parse_xml_string

from multiprocessing.connection import Listener, Client
from multiprocessing import Pool
import socket
from array import array

# #######################################
# #      Imports part of FlatCAM       ##
# #######################################
from ObjectCollection import *
from FlatCAMObj import *
from flatcamGUI.PlotCanvas import *
from flatcamGUI.FlatCAMGUI import *
from FlatCAMCommon import LoudDict
from FlatCAMPostProc import load_postprocessors

from flatcamEditors.FlatCAMGeoEditor import FlatCAMGeoEditor
from flatcamEditors.FlatCAMExcEditor import FlatCAMExcEditor
from flatcamEditors.FlatCAMGrbEditor import FlatCAMGrbEditor

from FlatCAMProcess import *
from FlatCAMWorkerStack import WorkerStack
from flatcamGUI.VisPyVisuals import Color
from vispy.gloo.util import _screenshot
from vispy.io import write_png

from flatcamTools import *

import tclCommands

import gettext
import FlatCAMTranslation as fcTranslate
import builtins

if sys.platform == 'win32':
    import winreg

fcTranslate.apply_language('strings')
if '_' not in builtins.__dict__:
    _ = gettext.gettext

# ########################################
# #                App                 ###
# ########################################


class App(QtCore.QObject):
    """
    The main application class. The constructor starts the GUI.
    """

    # Get Cmd Line Options
    cmd_line_shellfile = ''
    cmd_line_shellvar = ''

    cmd_line_help = "FlatCam.py --shellfile=<cmd_line_shellfile>\nFlatCam.py --shellvar=<1,'C:\path',23>"
    try:
        # Multiprocessing pool will spawn additional processes with 'multiprocessing-fork' flag
        cmd_line_options, args = getopt.getopt(sys.argv[1:], "h:", ["shellfile=",
                                                                    "shellvar=",
                                                                    "multiprocessing-fork="])
    except getopt.GetoptError:
        print(cmd_line_help)
        sys.exit(2)
    for opt, arg in cmd_line_options:
        if opt == '-h':
            print(cmd_line_help)
            sys.exit()
        elif opt == '--shellfile':
            cmd_line_shellfile = arg
        elif opt == '--shellvar':
            cmd_line_shellvar = arg

    # ## Logging ###
    log = logging.getLogger('base')
    log.setLevel(logging.DEBUG)
    # log.setLevel(logging.WARNING)
    formatter = logging.Formatter('[%(levelname)s][%(threadName)s] %(message)s')
    handler = logging.StreamHandler()
    handler.setFormatter(formatter)
    log.addHandler(handler)

    # ##########################################################################
    # ################## Version and VERSION DATE ##############################
    # ##########################################################################
    version = 8.97
    version_date = "2019/09/20"
    beta = True

    # current date now
    date = str(datetime.today()).rpartition('.')[0]
    date = ''.join(c for c in date if c not in ':-')
    date = date.replace(' ', '_')

    # URL for update checks and statistics
    version_url = "http://flatcam.org/version"

    # App URL
    app_url = "http://flatcam.org"

    # Manual URL
    manual_url = "http://flatcam.org/manual/index.html"
    video_url = "https://www.youtube.com/playlist?list=PLVvP2SYRpx-AQgNlfoxw93tXUXon7G94_"
    gerber_spec_url ="https://www.ucamco.com/files/downloads/file/81/The_Gerber_File_Format_specification." \
                     "pdf?7ac957791daba2cdf4c2c913f67a43da"
    excellon_spec_url = "https://www.ucamco.com/files/downloads/file/305/the_xnc_file_format_specification.pdf"
    bug_report_url = "https://bitbucket.org/jpcgt/flatcam/issues?status=new&status=open"

    # this variable will hold the project status
    # if True it will mean that the project was modified and not saved
    should_we_save = False

    # flag is True if saving action has been triggered
    save_in_progress = False

    # ###########################################################################
    # #############################    Signals   ################################
    # ###########################################################################

    # Inform the user
    # Handled by:
    #  * App.info() --> Print on the status bar
    inform = QtCore.pyqtSignal(str)

    app_quit = QtCore.pyqtSignal()

    # General purpose background task
    worker_task = QtCore.pyqtSignal(dict)

    # File opened
    # Handled by:
    #  * register_folder()
    #  * register_recent()
    # Note: Setting the parameters to unicode does not seem
    #       to have an effect. Then are received as Qstring
    #       anyway.

    # File type and filename
    file_opened = QtCore.pyqtSignal(str, str)
    # File type and filename
    file_saved = QtCore.pyqtSignal(str, str)

    # Percentage of progress
    progress = QtCore.pyqtSignal(int)

    plots_updated = QtCore.pyqtSignal()

    # Emitted by new_object() and passes the new object as argument, plot flag.
    # on_object_created() adds the object to the collection, plots on appropriate flag
    # and emits new_object_available.
    object_created = QtCore.pyqtSignal(object, bool, bool)

    # Emitted when a object has been changed (like scaled, mirrored)
    object_changed = QtCore.pyqtSignal(object)

    # Emitted after object has been plotted.
    # Calls 'on_zoom_fit' method to fit object in scene view in main thread to prevent drawing glitches.
    object_plotted = QtCore.pyqtSignal(object)

    # Emitted when a new object has been added or deleted from/to the collection
    object_status_changed = QtCore.pyqtSignal(object, str)

    message = QtCore.pyqtSignal(str, str, str)

    # Emmited when shell command is finished(one command only)
    shell_command_finished = QtCore.pyqtSignal(object)

    # Emitted when multiprocess pool has been recreated
    pool_recreated = QtCore.pyqtSignal(object)

    # Emitted when an unhandled exception happens
    # in the worker task.
    thread_exception = QtCore.pyqtSignal(object)

    # used to signal that there are arguments for the app
    args_at_startup = QtCore.pyqtSignal(list)

    # a reusable signal to replot a list of objects
    # should be disconnected after use so it can be reused
    replot_signal = pyqtSignal(list)

    def __init__(self, user_defaults=True, post_gui=None):
        """
        Starts the application.

        :return: app
        :rtype: App
        """

        App.log.info("FlatCAM Starting...")

        self.main_thread = QtWidgets.QApplication.instance().thread()

        # ############################################################################
        # # ################# OS-specific ############################################
        # ############################################################################
        portable = False

        # Folder for user settings.
        if sys.platform == 'win32':

            # #########################################################################
            # Setup the listening thread for another instance launching with args #####
            # #########################################################################

            # make sure the thread is stored by using a self. otherwise it's garbage collected
            self.th = QtCore.QThread()
            self.th.start(priority=QtCore.QThread.LowestPriority)

            self.new_launch = ArgsThread()
            self.new_launch.open_signal[list].connect(self.on_startup_args)
            self.new_launch.moveToThread(self.th)
            self.new_launch.start.emit()

            from win32com.shell import shell, shellcon
            if platform.architecture()[0] == '32bit':
                App.log.debug("Win32!")
            else:
                App.log.debug("Win64!")

            # #########################################################################
            # ####### CONFIG FILE WITH PARAMETERS REGARDING PORTABILITY ###############
            # #########################################################################
            config_file = os.path.dirname(os.path.dirname(os.path.realpath(__file__))) + '\\config\\configuration.txt'
            try:
                with open(config_file, 'r') as f:
                    try:
                        for line in f:
                            param = str(line).rpartition('=')
                            if param[0] == 'portable':
                                try:
                                    portable = eval(param[2])
                                except NameError:
                                    portable = False
                    except Exception as e:
                        log.debug('App.__init__() -->%s' % str(e))
                        return
            except FileNotFoundError:
                pass

            if portable is False:
                self.data_path = shell.SHGetFolderPath(0, shellcon.CSIDL_APPDATA, None, 0) + '\\FlatCAM'
            else:
                self.data_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__))) + '\\config'

            self.os = 'windows'
        else:  # Linux/Unix/MacOS
            self.data_path = os.path.expanduser('~') + '/.FlatCAM'
            self.os = 'unix'

        # ##########################################################################
        # ################## Setup folders and files ###############################
        # ##########################################################################

        if not os.path.exists(self.data_path):
            os.makedirs(self.data_path)
            App.log.debug('Created data folder: ' + self.data_path)
            os.makedirs(os.path.join(self.data_path, 'postprocessors'))
            App.log.debug('Created data postprocessors folder: ' + os.path.join(self.data_path, 'postprocessors'))

        self.postprocessorpaths = os.path.join(self.data_path, 'postprocessors')
        if not os.path.exists(self.postprocessorpaths):
            os.makedirs(self.postprocessorpaths)
            App.log.debug('Created postprocessors folder: ' + self.postprocessorpaths)

        # create current_defaults.FlatConfig file if there is none
        try:
            f = open(self.data_path + '/current_defaults.FlatConfig')
            f.close()
        except IOError:
            App.log.debug('Creating empty current_defaults.FlatConfig')
            f = open(self.data_path + '/current_defaults.FlatConfig', 'w')
            json.dump({}, f)
            f.close()

        # create factory_defaults.FlatConfig file if there is none
        try:
            f = open(self.data_path + '/factory_defaults.FlatConfig')
            f.close()
        except IOError:
            App.log.debug('Creating empty factory_defaults.FlatConfig')
            f = open(self.data_path + '/factory_defaults.FlatConfig', 'w')
            json.dump({}, f)
            f.close()

        try:
            f = open(self.data_path + '/recent.json')
            f.close()
        except IOError:
            App.log.debug('Creating empty recent.json')
            f = open(self.data_path + '/recent.json', 'w')
            json.dump([], f)
            f.close()

        try:
            fp = open(self.data_path + '/recent_projects.json')
            fp.close()
        except IOError:
            App.log.debug('Creating empty recent_projects.json')
            fp = open(self.data_path + '/recent_projects.json', 'w')
            json.dump([], fp)
            fp.close()

        # Application directory. CHDIR to it. Otherwise, trying to load
        # GUI icons will fail as their path is relative.
        # This will fail under cx_freeze ...
        self.app_home = os.path.dirname(os.path.realpath(__file__))

        App.log.debug("Application path is " + self.app_home)
        App.log.debug("Started in " + os.getcwd())

        # cx_freeze workaround
        if os.path.isfile(self.app_home):
            self.app_home = os.path.dirname(self.app_home)

        os.chdir(self.app_home)

        # #############################################################################
        # ##################### CREATE MULTIPROCESSING POOL ###########################
        # #############################################################################
        self.pool = Pool()

        # ##########################################################################
        # ################## Setting the Splash Screen #############################
        # ##########################################################################

        settings = QSettings("Open Source", "FlatCAM")
        if settings.contains("splash_screen"):
            show_splash = settings.value("splash_screen")
        else:
            settings.setValue('splash_screen', 1)

            # This will write the setting to the platform specific storage.
            del settings
            show_splash = 1

        if show_splash:
            splash_pix = QtGui.QPixmap('share/splash.png')
            self.splash = QtWidgets.QSplashScreen(splash_pix, Qt.WindowStaysOnTopHint)
            # self.splash.setMask(splash_pix.mask())

            # move splashscreen to the current monitor
            desktop = QtWidgets.QApplication.desktop()
            screen = desktop.screenNumber(QtGui.QCursor.pos())
            current_screen_center = desktop.availableGeometry(screen).center()
            self.splash.move(current_screen_center - self.splash.rect().center())

            self.splash.show()
            self.splash.showMessage(_("FlatCAM is initializing ..."),
                               alignment=Qt.AlignBottom | Qt.AlignLeft,
                               color=QtGui.QColor("gray"))

        # #############################################################################
        # ##################### Initialize GUI ########################################
        # #############################################################################

        # FlatCAM colors used in plotting
        self.FC_light_green = '#BBF268BF'
        self.FC_dark_green = '#006E20BF'
        self.FC_light_blue = '#a5a5ffbf'
        self.FC_dark_blue = '#0000ffbf'

        QtCore.QObject.__init__(self)
        self.ui = FlatCAMGUI(self.version, self.beta, self)

        self.ui.geom_update[int, int, int, int, int].connect(self.save_geometry)
        self.ui.final_save.connect(self.final_save)

        # #############################################################################
        # ############################## Data #########################################
        # #############################################################################
        self.recent = []
        self.recent_projects = []

        self.clipboard = QtWidgets.QApplication.clipboard()
        self.proc_container = FCVisibleProcessContainer(self.ui.activity_view)

        self.project_filename = None
        self.toggle_units_ignore = False

        # self.defaults_form = PreferencesUI()

        # when adding entries here read the comments in the  method found bellow named:
        # def new_object(self, kind, name, initialize, active=True, fit=True, plot=True)
        self.defaults_form_fields = {
            # General App
            "units": self.ui.general_defaults_form.general_app_group.units_radio,
            "global_app_level": self.ui.general_defaults_form.general_app_group.app_level_radio,
            "global_portable": self.ui.general_defaults_form.general_app_group.portability_cb,
            "global_language": self.ui.general_defaults_form.general_app_group.language_cb,

            "global_version_check": self.ui.general_defaults_form.general_app_group.version_check_cb,
            "global_send_stats": self.ui.general_defaults_form.general_app_group.send_stats_cb,
            "global_pan_button": self.ui.general_defaults_form.general_app_group.pan_button_radio,
            "global_mselect_key": self.ui.general_defaults_form.general_app_group.mselect_radio,

            "global_worker_number": self.ui.general_defaults_form.general_app_group.worker_number_sb,
            "global_tolerance": self.ui.general_defaults_form.general_app_group.tol_entry,

            "global_open_style": self.ui.general_defaults_form.general_app_group.open_style_cb,

            "global_compression_level": self.ui.general_defaults_form.general_app_group.compress_combo,
            "global_save_compressed": self.ui.general_defaults_form.general_app_group.save_type_cb,

            # General GUI Preferences
            "global_gridx": self.ui.general_defaults_form.general_gui_group.gridx_entry,
            "global_gridy": self.ui.general_defaults_form.general_gui_group.gridy_entry,
            "global_snap_max": self.ui.general_defaults_form.general_gui_group.snap_max_dist_entry,
            "global_workspace": self.ui.general_defaults_form.general_gui_group.workspace_cb,
            "global_workspaceT": self.ui.general_defaults_form.general_gui_group.wk_cb,

            "global_plot_fill": self.ui.general_defaults_form.general_gui_group.pf_color_entry,
            "global_plot_line": self.ui.general_defaults_form.general_gui_group.pl_color_entry,
            "global_sel_fill": self.ui.general_defaults_form.general_gui_group.sf_color_entry,
            "global_sel_line": self.ui.general_defaults_form.general_gui_group.sl_color_entry,
            "global_alt_sel_fill": self.ui.general_defaults_form.general_gui_group.alt_sf_color_entry,
            "global_alt_sel_line": self.ui.general_defaults_form.general_gui_group.alt_sl_color_entry,
            "global_draw_color": self.ui.general_defaults_form.general_gui_group.draw_color_entry,
            "global_sel_draw_color": self.ui.general_defaults_form.general_gui_group.sel_draw_color_entry,

            "global_proj_item_color": self.ui.general_defaults_form.general_gui_group.proj_color_entry,
            "global_proj_item_dis_color": self.ui.general_defaults_form.general_gui_group.proj_color_dis_entry,

            # General GUI Settings
            "global_layout": self.ui.general_defaults_form.general_gui_set_group.layout_combo,
            "global_hover": self.ui.general_defaults_form.general_gui_set_group.hover_cb,
            "global_selection_shape": self.ui.general_defaults_form.general_gui_set_group.selection_cb,
            "global_shell_at_startup": self.ui.general_defaults_form.general_gui_set_group.shell_startup_cb,
            "global_project_at_startup": self.ui.general_defaults_form.general_gui_set_group.project_startup_cb,
            "global_project_autohide": self.ui.general_defaults_form.general_gui_set_group.project_autohide_cb,
            "global_toggle_tooltips": self.ui.general_defaults_form.general_gui_set_group.toggle_tooltips_cb,
            "global_delete_confirmation": self.ui.general_defaults_form.general_gui_set_group.delete_conf_cb,

            # Gerber General
            "gerber_plot": self.ui.gerber_defaults_form.gerber_gen_group.plot_cb,
            "gerber_solid": self.ui.gerber_defaults_form.gerber_gen_group.solid_cb,
            "gerber_multicolored": self.ui.gerber_defaults_form.gerber_gen_group.multicolored_cb,
            "gerber_circle_steps": self.ui.gerber_defaults_form.gerber_gen_group.circle_steps_entry,

            # Gerber Options
            "gerber_isotooldia": self.ui.gerber_defaults_form.gerber_opt_group.iso_tool_dia_entry,
            "gerber_isopasses": self.ui.gerber_defaults_form.gerber_opt_group.iso_width_entry,
            "gerber_isooverlap": self.ui.gerber_defaults_form.gerber_opt_group.iso_overlap_entry,
            "gerber_combine_passes": self.ui.gerber_defaults_form.gerber_opt_group.combine_passes_cb,
            "gerber_milling_type": self.ui.gerber_defaults_form.gerber_opt_group.milling_type_radio,
            "gerber_noncoppermargin": self.ui.gerber_defaults_form.gerber_opt_group.noncopper_margin_entry,
            "gerber_noncopperrounded": self.ui.gerber_defaults_form.gerber_opt_group.noncopper_rounded_cb,
            "gerber_bboxmargin": self.ui.gerber_defaults_form.gerber_opt_group.bbmargin_entry,
            "gerber_bboxrounded": self.ui.gerber_defaults_form.gerber_opt_group.bbrounded_cb,

            # Gerber Advanced Options
            "gerber_aperture_display": self.ui.gerber_defaults_form.gerber_adv_opt_group.aperture_table_visibility_cb,
            # "gerber_aperture_scale_factor": self.ui.gerber_defaults_form.gerber_adv_opt_group.scale_aperture_entry,
            # "gerber_aperture_buffer_factor": self.ui.gerber_defaults_form.gerber_adv_opt_group.buffer_aperture_entry,
            "gerber_follow": self.ui.gerber_defaults_form.gerber_adv_opt_group.follow_cb,
            "gerber_buffering": self.ui.gerber_defaults_form.gerber_adv_opt_group.buffering_radio,
            "gerber_simplification": self.ui.gerber_defaults_form.gerber_adv_opt_group.simplify_cb,
            "gerber_simp_tolerance": self.ui.gerber_defaults_form.gerber_adv_opt_group.simplification_tol_spinner,

            # Gerber Export
            "gerber_exp_units": self.ui.gerber_defaults_form.gerber_exp_group.gerber_units_radio,
            "gerber_exp_integer": self.ui.gerber_defaults_form.gerber_exp_group.format_whole_entry,
            "gerber_exp_decimals": self.ui.gerber_defaults_form.gerber_exp_group.format_dec_entry,
            "gerber_exp_zeros": self.ui.gerber_defaults_form.gerber_exp_group.zeros_radio,

            # Gerber Editor
            "gerber_editor_sel_limit": self.ui.gerber_defaults_form.gerber_editor_group.sel_limit_entry,
            "gerber_editor_newcode": self.ui.gerber_defaults_form.gerber_editor_group.addcode_entry,
            "gerber_editor_newsize": self.ui.gerber_defaults_form.gerber_editor_group.addsize_entry,
            "gerber_editor_newtype": self.ui.gerber_defaults_form.gerber_editor_group.addtype_combo,
            "gerber_editor_newdim": self.ui.gerber_defaults_form.gerber_editor_group.adddim_entry,
            "gerber_editor_array_size": self.ui.gerber_defaults_form.gerber_editor_group.grb_array_size_entry,
            "gerber_editor_lin_axis": self.ui.gerber_defaults_form.gerber_editor_group.grb_axis_radio,
            "gerber_editor_lin_pitch": self.ui.gerber_defaults_form.gerber_editor_group.grb_pitch_entry,
            "gerber_editor_lin_angle": self.ui.gerber_defaults_form.gerber_editor_group.grb_angle_entry,
            "gerber_editor_circ_dir": self.ui.gerber_defaults_form.gerber_editor_group.grb_circular_dir_radio,
            "gerber_editor_circ_angle":
                self.ui.gerber_defaults_form.gerber_editor_group.grb_circular_angle_entry,
            "gerber_editor_scale_f": self.ui.gerber_defaults_form.gerber_editor_group.grb_scale_entry,
            "gerber_editor_buff_f": self.ui.gerber_defaults_form.gerber_editor_group.grb_buff_entry,
            "gerber_editor_ma_low": self.ui.gerber_defaults_form.gerber_editor_group.grb_ma_low_entry,
            "gerber_editor_ma_high": self.ui.gerber_defaults_form.gerber_editor_group.grb_ma_high_entry,

            # Excellon General
            "excellon_plot": self.ui.excellon_defaults_form.excellon_gen_group.plot_cb,
            "excellon_solid": self.ui.excellon_defaults_form.excellon_gen_group.solid_cb,
            "excellon_format_upper_in":
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_in_entry,
            "excellon_format_lower_in":
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_in_entry,
            "excellon_format_upper_mm":
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_mm_entry,
            "excellon_format_lower_mm":
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_mm_entry,
            "excellon_zeros": self.ui.excellon_defaults_form.excellon_gen_group.excellon_zeros_radio,
            "excellon_units": self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio,
            "excellon_update": self.ui.excellon_defaults_form.excellon_gen_group.update_excellon_cb,
            "excellon_optimization_type": self.ui.excellon_defaults_form.excellon_gen_group.excellon_optimization_radio,
            "excellon_search_time": self.ui.excellon_defaults_form.excellon_gen_group.optimization_time_entry,

            # Excellon Options
            "excellon_drillz": self.ui.excellon_defaults_form.excellon_opt_group.cutz_entry,
            "excellon_travelz": self.ui.excellon_defaults_form.excellon_opt_group.travelz_entry,
            "excellon_endz": self.ui.excellon_defaults_form.excellon_opt_group.eendz_entry,
            "excellon_feedrate": self.ui.excellon_defaults_form.excellon_opt_group.feedrate_entry,
            "excellon_spindlespeed": self.ui.excellon_defaults_form.excellon_opt_group.spindlespeed_entry,
            "excellon_dwell": self.ui.excellon_defaults_form.excellon_opt_group.dwell_cb,
            "excellon_dwelltime": self.ui.excellon_defaults_form.excellon_opt_group.dwelltime_entry,
            "excellon_toolchange": self.ui.excellon_defaults_form.excellon_opt_group.toolchange_cb,
            "excellon_toolchangez": self.ui.excellon_defaults_form.excellon_opt_group.toolchangez_entry,
            "excellon_ppname_e": self.ui.excellon_defaults_form.excellon_opt_group.pp_excellon_name_cb,
            "excellon_tooldia": self.ui.excellon_defaults_form.excellon_opt_group.tooldia_entry,
            "excellon_slot_tooldia": self.ui.excellon_defaults_form.excellon_opt_group.slot_tooldia_entry,
            "excellon_gcode_type": self.ui.excellon_defaults_form.excellon_opt_group.excellon_gcode_type_radio,

            # Excellon Advanced Options
            "excellon_offset": self.ui.excellon_defaults_form.excellon_adv_opt_group.offset_entry,
            "excellon_toolchangexy": self.ui.excellon_defaults_form.excellon_adv_opt_group.toolchangexy_entry,
            "excellon_startz": self.ui.excellon_defaults_form.excellon_adv_opt_group.estartz_entry,
            "excellon_feedrate_rapid": self.ui.excellon_defaults_form.excellon_adv_opt_group.feedrate_rapid_entry,
            "excellon_z_pdepth": self.ui.excellon_defaults_form.excellon_adv_opt_group.pdepth_entry,
            "excellon_feedrate_probe": self.ui.excellon_defaults_form.excellon_adv_opt_group.feedrate_probe_entry,
            "excellon_spindledir": self.ui.excellon_defaults_form.excellon_adv_opt_group.spindledir_radio,
            "excellon_f_plunge": self.ui.excellon_defaults_form.excellon_adv_opt_group.fplunge_cb,
            "excellon_f_retract": self.ui.excellon_defaults_form.excellon_adv_opt_group.fretract_cb,

            # Excellon Export
            "excellon_exp_units": self.ui.excellon_defaults_form.excellon_exp_group.excellon_units_radio,
            "excellon_exp_format": self.ui.excellon_defaults_form.excellon_exp_group.format_radio,
            "excellon_exp_integer": self.ui.excellon_defaults_form.excellon_exp_group.format_whole_entry,
            "excellon_exp_decimals": self.ui.excellon_defaults_form.excellon_exp_group.format_dec_entry,
            "excellon_exp_zeros": self.ui.excellon_defaults_form.excellon_exp_group.zeros_radio,
            "excellon_exp_slot_type": self.ui.excellon_defaults_form.excellon_exp_group.slot_type_radio,

            # Excellon Editor
            "excellon_editor_sel_limit": self.ui.excellon_defaults_form.excellon_editor_group.sel_limit_entry,
            "excellon_editor_newdia": self.ui.excellon_defaults_form.excellon_editor_group.addtool_entry,
            "excellon_editor_array_size": self.ui.excellon_defaults_form.excellon_editor_group.drill_array_size_entry,
            "excellon_editor_lin_dir": self.ui.excellon_defaults_form.excellon_editor_group.drill_axis_radio,
            "excellon_editor_lin_pitch": self.ui.excellon_defaults_form.excellon_editor_group.drill_pitch_entry,
            "excellon_editor_lin_angle": self.ui.excellon_defaults_form.excellon_editor_group.drill_angle_entry,
            "excellon_editor_circ_dir": self.ui.excellon_defaults_form.excellon_editor_group.drill_circular_dir_radio,
            "excellon_editor_circ_angle":
                self.ui.excellon_defaults_form.excellon_editor_group.drill_circular_angle_entry,
            # Excellon Slots
            "excellon_editor_slot_direction":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_axis_radio,
            "excellon_editor_slot_angle":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_angle_spinner,
            "excellon_editor_slot_length":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_length_entry,
            # Excellon Slots
            "excellon_editor_slot_array_size":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_array_size_entry,
            "excellon_editor_slot_lin_dir": self.ui.excellon_defaults_form.excellon_editor_group.slot_array_axis_radio,
            "excellon_editor_slot_lin_pitch":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_array_pitch_entry,
            "excellon_editor_slot_lin_angle":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_array_angle_entry,
            "excellon_editor_slot_circ_dir":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_array_circular_dir_radio,
            "excellon_editor_slot_circ_angle":
                self.ui.excellon_defaults_form.excellon_editor_group.slot_array_circular_angle_entry,

            # Geometry General
            "geometry_plot": self.ui.geometry_defaults_form.geometry_gen_group.plot_cb,
            "geometry_circle_steps": self.ui.geometry_defaults_form.geometry_gen_group.circle_steps_entry,
            "geometry_cnctooldia": self.ui.geometry_defaults_form.geometry_gen_group.cnctooldia_entry,

            # Geometry Options
            "geometry_cutz": self.ui.geometry_defaults_form.geometry_opt_group.cutz_entry,
            "geometry_travelz": self.ui.geometry_defaults_form.geometry_opt_group.travelz_entry,
            "geometry_feedrate": self.ui.geometry_defaults_form.geometry_opt_group.cncfeedrate_entry,
            "geometry_feedrate_z": self.ui.geometry_defaults_form.geometry_opt_group.cncplunge_entry,
            "geometry_spindlespeed": self.ui.geometry_defaults_form.geometry_opt_group.cncspindlespeed_entry,
            "geometry_dwell": self.ui.geometry_defaults_form.geometry_opt_group.dwell_cb,
            "geometry_dwelltime": self.ui.geometry_defaults_form.geometry_opt_group.dwelltime_entry,
            "geometry_ppname_g": self.ui.geometry_defaults_form.geometry_opt_group.pp_geometry_name_cb,
            "geometry_toolchange": self.ui.geometry_defaults_form.geometry_opt_group.toolchange_cb,
            "geometry_toolchangez": self.ui.geometry_defaults_form.geometry_opt_group.toolchangez_entry,
            "geometry_endz": self.ui.geometry_defaults_form.geometry_opt_group.gendz_entry,
            "geometry_depthperpass": self.ui.geometry_defaults_form.geometry_opt_group.depthperpass_entry,
            "geometry_multidepth": self.ui.geometry_defaults_form.geometry_opt_group.multidepth_cb,

            # Geometry Advanced Options
            "geometry_toolchangexy": self.ui.geometry_defaults_form.geometry_adv_opt_group.toolchangexy_entry,
            "geometry_startz": self.ui.geometry_defaults_form.geometry_adv_opt_group.gstartz_entry,
            "geometry_feedrate_rapid": self.ui.geometry_defaults_form.geometry_adv_opt_group.cncfeedrate_rapid_entry,
            "geometry_extracut": self.ui.geometry_defaults_form.geometry_adv_opt_group.extracut_cb,
            "geometry_z_pdepth": self.ui.geometry_defaults_form.geometry_adv_opt_group.pdepth_entry,
            "geometry_feedrate_probe": self.ui.geometry_defaults_form.geometry_adv_opt_group.feedrate_probe_entry,
            "geometry_spindledir": self.ui.geometry_defaults_form.geometry_adv_opt_group.spindledir_radio,
            "geometry_f_plunge": self.ui.geometry_defaults_form.geometry_adv_opt_group.fplunge_cb,
            "geometry_segx": self.ui.geometry_defaults_form.geometry_adv_opt_group.segx_entry,
            "geometry_segy": self.ui.geometry_defaults_form.geometry_adv_opt_group.segy_entry,

            # Geometry Editor
            "geometry_editor_sel_limit": self.ui.geometry_defaults_form.geometry_editor_group.sel_limit_entry,

            # CNCJob General
            "cncjob_plot": self.ui.cncjob_defaults_form.cncjob_gen_group.plot_cb,
            "cncjob_plot_kind": self.ui.cncjob_defaults_form.cncjob_gen_group.cncplot_method_radio,
            "cncjob_annotation": self.ui.cncjob_defaults_form.cncjob_gen_group.annotation_cb,

            "cncjob_tooldia": self.ui.cncjob_defaults_form.cncjob_gen_group.tooldia_entry,
            "cncjob_coords_type": self.ui.cncjob_defaults_form.cncjob_gen_group.coords_type_radio,
            "cncjob_coords_decimals": self.ui.cncjob_defaults_form.cncjob_gen_group.coords_dec_entry,
            "cncjob_fr_decimals": self.ui.cncjob_defaults_form.cncjob_gen_group.fr_dec_entry,
            "cncjob_steps_per_circle": self.ui.cncjob_defaults_form.cncjob_gen_group.steps_per_circle_entry,

            # CNC Job Options
            "cncjob_prepend": self.ui.cncjob_defaults_form.cncjob_opt_group.prepend_text,
            "cncjob_append": self.ui.cncjob_defaults_form.cncjob_opt_group.append_text,

            # CNC Job Advanced Options
            "cncjob_toolchange_macro": self.ui.cncjob_defaults_form.cncjob_adv_opt_group.toolchange_text,
            "cncjob_toolchange_macro_enable": self.ui.cncjob_defaults_form.cncjob_adv_opt_group.toolchange_cb,
            "cncjob_annotation_fontsize": self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontsize_sp,
            "cncjob_annotation_fontcolor": self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_entry,

            # NCC Tool
            "tools_ncctools": self.ui.tools_defaults_form.tools_ncc_group.ncc_tool_dia_entry,
            "tools_nccorder": self.ui.tools_defaults_form.tools_ncc_group.ncc_order_radio,
            "tools_nccoverlap": self.ui.tools_defaults_form.tools_ncc_group.ncc_overlap_entry,
            "tools_nccmargin": self.ui.tools_defaults_form.tools_ncc_group.ncc_margin_entry,
            "tools_nccmethod": self.ui.tools_defaults_form.tools_ncc_group.ncc_method_radio,
            "tools_nccconnect": self.ui.tools_defaults_form.tools_ncc_group.ncc_connect_cb,
            "tools_ncccontour": self.ui.tools_defaults_form.tools_ncc_group.ncc_contour_cb,
            "tools_nccrest": self.ui.tools_defaults_form.tools_ncc_group.ncc_rest_cb,
            "tools_ncc_offset_choice": self.ui.tools_defaults_form.tools_ncc_group.ncc_choice_offset_cb,
            "tools_ncc_offset_value": self.ui.tools_defaults_form.tools_ncc_group.ncc_offset_spinner,
            "tools_nccref": self.ui.tools_defaults_form.tools_ncc_group.reference_radio,
            "tools_ncc_plotting": self.ui.tools_defaults_form.tools_ncc_group.ncc_plotting_radio,
            "tools_nccmilling_type": self.ui.tools_defaults_form.tools_ncc_group.milling_type_radio,
            "tools_ncctool_type": self.ui.tools_defaults_form.tools_ncc_group.tool_type_radio,
            "tools_ncccutz": self.ui.tools_defaults_form.tools_ncc_group.cutz_entry,
            "tools_ncctipdia": self.ui.tools_defaults_form.tools_ncc_group.tipdia_entry,
            "tools_ncctipangle": self.ui.tools_defaults_form.tools_ncc_group.tipangle_entry,

            # CutOut Tool
            "tools_cutouttooldia": self.ui.tools_defaults_form.tools_cutout_group.cutout_tooldia_entry,
            "tools_cutoutkind": self.ui.tools_defaults_form.tools_cutout_group.obj_kind_combo,
            "tools_cutoutmargin": self.ui.tools_defaults_form.tools_cutout_group.cutout_margin_entry,
            "tools_cutoutgapsize": self.ui.tools_defaults_form.tools_cutout_group.cutout_gap_entry,
            "tools_gaps_ff": self.ui.tools_defaults_form.tools_cutout_group.gaps_combo,
            "tools_cutout_convexshape": self.ui.tools_defaults_form.tools_cutout_group.convex_box,

            # Paint Area Tool
            "tools_painttooldia": self.ui.tools_defaults_form.tools_paint_group.painttooldia_entry,
            "tools_paintorder": self.ui.tools_defaults_form.tools_paint_group.paint_order_radio,
            "tools_paintoverlap": self.ui.tools_defaults_form.tools_paint_group.paintoverlap_entry,
            "tools_paintmargin": self.ui.tools_defaults_form.tools_paint_group.paintmargin_entry,
            "tools_paintmethod": self.ui.tools_defaults_form.tools_paint_group.paintmethod_combo,
            "tools_selectmethod": self.ui.tools_defaults_form.tools_paint_group.selectmethod_combo,
            "tools_pathconnect": self.ui.tools_defaults_form.tools_paint_group.pathconnect_cb,
            "tools_paintcontour": self.ui.tools_defaults_form.tools_paint_group.contour_cb,
            "tools_paint_plotting": self.ui.tools_defaults_form.tools_paint_group.paint_plotting_radio,

            # 2-sided Tool
            "tools_2sided_mirror_axis": self.ui.tools_defaults_form.tools_2sided_group.mirror_axis_radio,
            "tools_2sided_axis_loc": self.ui.tools_defaults_form.tools_2sided_group.axis_location_radio,
            "tools_2sided_drilldia": self.ui.tools_defaults_form.tools_2sided_group.drill_dia_entry,

            # Film Tool
            "tools_film_type": self.ui.tools_defaults_form.tools_film_group.film_type_radio,
            "tools_film_boundary": self.ui.tools_defaults_form.tools_film_group.film_boundary_entry,
            "tools_film_scale": self.ui.tools_defaults_form.tools_film_group.film_scale_entry,
            "tools_film_color": self.ui.tools_defaults_form.tools_film_group.film_color_entry,

            # Panelize Tool
            "tools_panelize_spacing_columns": self.ui.tools_defaults_form.tools_panelize_group.pspacing_columns,
            "tools_panelize_spacing_rows": self.ui.tools_defaults_form.tools_panelize_group.pspacing_rows,
            "tools_panelize_columns": self.ui.tools_defaults_form.tools_panelize_group.pcolumns,
            "tools_panelize_rows": self.ui.tools_defaults_form.tools_panelize_group.prows,
            "tools_panelize_constrain": self.ui.tools_defaults_form.tools_panelize_group.pconstrain_cb,
            "tools_panelize_constrainx": self.ui.tools_defaults_form.tools_panelize_group.px_width_entry,
            "tools_panelize_constrainy": self.ui.tools_defaults_form.tools_panelize_group.py_height_entry,
            "tools_panelize_panel_type": self.ui.tools_defaults_form.tools_panelize_group.panel_type_radio,

            # Calculators Tool
            "tools_calc_vshape_tip_dia": self.ui.tools_defaults_form.tools_calculators_group.tip_dia_entry,
            "tools_calc_vshape_tip_angle": self.ui.tools_defaults_form.tools_calculators_group.tip_angle_entry,
            "tools_calc_vshape_cut_z": self.ui.tools_defaults_form.tools_calculators_group.cut_z_entry,
            "tools_calc_electro_length": self.ui.tools_defaults_form.tools_calculators_group.pcblength_entry,
            "tools_calc_electro_width": self.ui.tools_defaults_form.tools_calculators_group.pcbwidth_entry,
            "tools_calc_electro_cdensity": self.ui.tools_defaults_form.tools_calculators_group.cdensity_entry,
            "tools_calc_electro_growth": self.ui.tools_defaults_form.tools_calculators_group.growth_entry,

            # Transformations Tool
            "tools_transform_rotate": self.ui.tools_defaults_form.tools_transform_group.rotate_entry,
            "tools_transform_skew_x": self.ui.tools_defaults_form.tools_transform_group.skewx_entry,
            "tools_transform_skew_y": self.ui.tools_defaults_form.tools_transform_group.skewy_entry,
            "tools_transform_scale_x": self.ui.tools_defaults_form.tools_transform_group.scalex_entry,
            "tools_transform_scale_y": self.ui.tools_defaults_form.tools_transform_group.scaley_entry,
            "tools_transform_scale_link": self.ui.tools_defaults_form.tools_transform_group.link_cb,
            "tools_transform_scale_reference": self.ui.tools_defaults_form.tools_transform_group.reference_cb,
            "tools_transform_offset_x": self.ui.tools_defaults_form.tools_transform_group.offx_entry,
            "tools_transform_offset_y": self.ui.tools_defaults_form.tools_transform_group.offy_entry,
            "tools_transform_mirror_reference": self.ui.tools_defaults_form.tools_transform_group.mirror_reference_cb,
            "tools_transform_mirror_point": self.ui.tools_defaults_form.tools_transform_group.flip_ref_entry,

            # SolderPaste Dispensing Tool
            "tools_solderpaste_tools": self.ui.tools_defaults_form.tools_solderpaste_group.nozzle_tool_dia_entry,
            "tools_solderpaste_new": self.ui.tools_defaults_form.tools_solderpaste_group.addtool_entry,
            "tools_solderpaste_z_start": self.ui.tools_defaults_form.tools_solderpaste_group.z_start_entry,
            "tools_solderpaste_z_dispense": self.ui.tools_defaults_form.tools_solderpaste_group.z_dispense_entry,
            "tools_solderpaste_z_stop": self.ui.tools_defaults_form.tools_solderpaste_group.z_stop_entry,
            "tools_solderpaste_z_travel": self.ui.tools_defaults_form.tools_solderpaste_group.z_travel_entry,
            "tools_solderpaste_z_toolchange": self.ui.tools_defaults_form.tools_solderpaste_group.z_toolchange_entry,
            "tools_solderpaste_xy_toolchange": self.ui.tools_defaults_form.tools_solderpaste_group.xy_toolchange_entry,
            "tools_solderpaste_frxy": self.ui.tools_defaults_form.tools_solderpaste_group.frxy_entry,
            "tools_solderpaste_frz": self.ui.tools_defaults_form.tools_solderpaste_group.frz_entry,
            "tools_solderpaste_frz_dispense": self.ui.tools_defaults_form.tools_solderpaste_group.frz_dispense_entry,
            "tools_solderpaste_speedfwd": self.ui.tools_defaults_form.tools_solderpaste_group.speedfwd_entry,
            "tools_solderpaste_dwellfwd": self.ui.tools_defaults_form.tools_solderpaste_group.dwellfwd_entry,
            "tools_solderpaste_speedrev": self.ui.tools_defaults_form.tools_solderpaste_group.speedrev_entry,
            "tools_solderpaste_dwellrev": self.ui.tools_defaults_form.tools_solderpaste_group.dwellrev_entry,
            "tools_solderpaste_pp": self.ui.tools_defaults_form.tools_solderpaste_group.pp_combo,
            "tools_sub_close_paths": self.ui.tools_defaults_form.tools_sub_group.close_paths_cb,

            # file associations
            "fa_excellon": self.ui.fa_defaults_form.fa_excellon_group.exc_list_text,
            "fa_gcode": self.ui.fa_defaults_form.fa_gcode_group.gco_list_text,
            # "fa_geometry": self.ui.fa_defaults_form.fa_geometry_group.close_paths_cb,
            "fa_gerber": self.ui.fa_defaults_form.fa_gerber_group.grb_list_text,

        }

        # ############################
        # ### LOAD POSTPROCESSORS ####
        # ############################

        self.postprocessors = load_postprocessors(self)

        for name in list(self.postprocessors.keys()):
            # 'Paste' postprocessors are to be used only in the Solder Paste Dispensing Tool
            if name.partition('_')[0] == 'Paste':
                self.ui.tools_defaults_form.tools_solderpaste_group.pp_combo.addItem(name)
                continue

            self.ui.geometry_defaults_form.geometry_opt_group.pp_geometry_name_cb.addItem(name)
            # HPGL postprocessor is only for Geometry objects therefore it should not be in the Excellon Preferences
            if name == 'hpgl':
                continue

            self.ui.excellon_defaults_form.excellon_opt_group.pp_excellon_name_cb.addItem(name)

        # ############################
        # ### LOAD LANGUAGES      ####
        # ############################

        self.languages = fcTranslate.load_languages()
        for name in sorted(self.languages.values()):
            self.ui.general_defaults_form.general_app_group.language_cb.addItem(name)

        self.defaults = LoudDict()
        self.defaults.set_change_callback(self.on_defaults_dict_change)  # When the dictionary changes.
        self.defaults.update({
            # Global APP Preferences
            "first_run": True,
            "units": "IN",
            "global_serial": 0,
            "global_stats": {},
            "global_tabs_detachable": True,
            "global_app_level": 'b',
            "global_portable": False,
            "global_language": 'English',
            "global_version_check": True,
            "global_send_stats": True,
            "global_pan_button": '2',
            "global_mselect_key": 'Control',
            "global_project_at_startup": False,
            "global_project_autohide": True,
            "global_toggle_tooltips": True,
            "global_worker_number": 2,
            "global_tolerance": 0.01,
            "global_open_style": True,
            "global_delete_confirmation": True,
            "global_compression_level": 3,
            "global_save_compressed": True,

            # Global GUI Preferences
            "global_gridx": 0.0393701,
            "global_gridy": 0.0393701,
            "global_snap_max": 0.001968504,
            "global_workspace": False,
            "global_workspaceT": "A4P",

            "global_grid_context_menu": {
                'in': [0.01, 0.02, 0.025, 0.05, 0.1],
                'mm': [0.1, 0.2, 0.5, 1, 2.54]
            },

            "global_plot_fill": '#BBF268BF',
            "global_plot_line": '#006E20BF',
            "global_sel_fill": '#a5a5ffbf',
            "global_sel_line": '#0000ffbf',
            "global_alt_sel_fill": '#BBF268BF',
            "global_alt_sel_line": '#006E20BF',
            "global_draw_color": '#FF0000',
            "global_sel_draw_color": '#0000FF',
            "global_proj_item_color": '#000000',
            "global_proj_item_dis_color": '#b7b7cb',

            "global_toolbar_view": 511,

            "global_background_timeout": 300000,  # Default value is 5 minutes
            "global_verbose_error_level": 0,  # Shell verbosity 0 = default
            # (python trace only for unknown errors),
            # 1 = show trace(show trace always),
            # 2 = (For the future).

            # Persistence
            "global_last_folder": None,
            "global_last_save_folder": None,

            # Default window geometry
            "global_def_win_x": 100,
            "global_def_win_y": 100,
            "global_def_win_w": 1024,
            "global_def_win_h": 650,
            "global_def_notebook_width": 1,

            # Constants...
            "global_defaults_save_period_ms": 20000,  # Time between default saves.
            "global_shell_shape": [500, 300],  # Shape of the shell in pixels.
            "global_shell_at_startup": False,  # Show the shell at startup.
            "global_recent_limit": 10,  # Max. items in recent list.

            "fit_key": 'V',
            "zoom_out_key": '-',
            "zoom_in_key": '=',
            "grid_toggle_key": 'G',
            "global_zoom_ratio": 1.5,
            "global_point_clipboard_format": "(%.4f, %.4f)",
            "global_zdownrate": None,

            # autocomplete keywords
            "global_autocomplete_keywords":
                ['all', 'angle_x', 'angle_y', 'axis', 'axisoffset', 'box', 'center_x', 'center_y',
                 'columns', 'combine', 'connect', 'contour', 'depthperpass', 'dia', 'diatol', 'dist',
                 'drilled_dias', 'drillz', 'pp',
                 'gridoffsety', 'gridx', 'gridy', 'has_offset', 'holes', 'margin', 'method',
                 'milled_dias',
                 'minoffset', 'multidepth', 'name', 'offset', 'opt_type', 'order', 'outname',
                 'overlap', 'passes', 'postamble', 'ppname_e', 'ppname_g', 'preamble', 'radius', 'ref',
                 'rest', 'rows', 'scale_factor', 'spacing_columns', 'spacing_rows', 'spindlespeed',
                 'use_threads', 'value', 'x', 'x0', 'x1', 'y', 'y0', 'y1', 'z_cut', 'z_move',
                 'default', 'feedrate_z', 'grbl_11', 'grbl_laser', 'hpgl', 'line_xyz', 'marlin',
                 'Paste_1', 'Repetier', 'Toolchange_Custom', 'Roland_MDX_20', 'Toolchange_manual',
                 'Toolchange_Probe_MACH3', 'dwell', 'dwelltime', 'toolchange_xy', 'iso_type',
                 'Desktop', 'FlatPrj', 'FlatConfig', 'Users', 'Documents', 'My Documents', 'Marius'
                 ],
            # General GUI Settings
            "global_hover": False,
            "global_selection_shape": True,
            "global_layout": "compact",

            # Gerber General
            "gerber_plot": True,
            "gerber_solid": True,
            "gerber_multicolored": False,
            "gerber_circle_steps": 128,
            "gerber_use_buffer_for_union": True,

            # Gerber Options
            "gerber_isotooldia": 0.00787402,
            "gerber_isopasses": 1,
            "gerber_isooverlap": 0.00393701,
            "gerber_milling_type": "cl",
            "gerber_combine_passes": False,
            "gerber_noncoppermargin": 0.00393701,
            "gerber_noncopperrounded": False,
            "gerber_bboxmargin": 0.00393701,
            "gerber_bboxrounded": False,

            # Gerber Advanced Options
            "gerber_aperture_display": False,
            "gerber_aperture_scale_factor": 1.0,
            "gerber_aperture_buffer_factor": 0.0,
            "gerber_follow": False,
            "gerber_buffering": "full",
            "gerber_simplification": False,
            "gerber_simp_tolerance": 0.0005,

            # Gerber Export
            "gerber_exp_units": 'IN',
            "gerber_exp_integer": 2,
            "gerber_exp_decimals": 4,
            "gerber_exp_zeros": 'L',

            # Gerber Editor
            "gerber_editor_sel_limit": 30,
            "gerber_editor_newcode": 10,
            "gerber_editor_newsize": 0.8,
            "gerber_editor_newtype": 'C',
            "gerber_editor_newdim": "0.5, 0.5",
            "gerber_editor_array_size": 5,
            "gerber_editor_lin_axis": 'X',
            "gerber_editor_lin_pitch": 1,
            "gerber_editor_lin_angle": 0.0,
            "gerber_editor_circ_dir": 'CW',
            "gerber_editor_circ_angle": 0.0,
            "gerber_editor_scale_f": 1.0,
            "gerber_editor_buff_f": 0.1,
            "gerber_editor_ma_low": 0.0,
            "gerber_editor_ma_high": 1.0,

            # Excellon General
            "excellon_plot": True,
            "excellon_solid": True,
            "excellon_format_upper_in": 2,
            "excellon_format_lower_in": 4,
            "excellon_format_upper_mm": 3,
            "excellon_format_lower_mm": 3,
            "excellon_zeros": "L",
            "excellon_units": "INCH",
            "excellon_update": True,
            "excellon_optimization_type": 'B',
            "excellon_search_time": 3,

            # Excellon Options
            "excellon_drillz": -0.0590551,
            "excellon_travelz": 0.0787402,
            "excellon_endz": 0.5,
            "excellon_feedrate": 3.14961,
            "excellon_spindlespeed": None,
            "excellon_dwell": False,
            "excellon_dwelltime": 1,
            "excellon_toolchange": False,
            "excellon_toolchangez": 0.5,
            "excellon_ppname_e": 'default',
            "excellon_tooldia": 0.0314961,
            "excellon_slot_tooldia": 0.0708661,
            "excellon_gcode_type": "drills",

            # Excellon Advanced Options
            "excellon_offset": 0.0,
            "excellon_toolchangexy": "0.0, 0.0",
            "excellon_startz": None,
            "excellon_feedrate_rapid": 31.4961,
            "excellon_z_pdepth": -0.02,
            "excellon_feedrate_probe": 3.14961,
            "excellon_spindledir": 'CW',
            "excellon_f_plunge": False,
            "excellon_f_retract": False,

            # Excellon Export
            "excellon_exp_units": 'INCH',
            "excellon_exp_format": 'ndec',
            "excellon_exp_integer": 2,
            "excellon_exp_decimals": 4,
            "excellon_exp_zeros": 'LZ',
            "excellon_exp_slot_type": 'routing',

            # Excellon Editor
            "excellon_editor_sel_limit": 30,
            "excellon_editor_newdia": 0.039,
            "excellon_editor_array_size": 5,
            "excellon_editor_lin_dir": 'X',
            "excellon_editor_lin_pitch": 0.1,
            "excellon_editor_lin_angle": 0.0,
            "excellon_editor_circ_dir": 'CW',
            "excellon_editor_circ_angle": 12,
            # Excellon Slots
            "excellon_editor_slot_direction": 'X',
            "excellon_editor_slot_angle": 0.0,
            "excellon_editor_slot_length": 5.0,
            # Excellon Slot Array
            "excellon_editor_slot_array_size": 5,
            "excellon_editor_slot_lin_dir":  'X',
            "excellon_editor_slot_lin_pitch": 0.1,
            "excellon_editor_slot_lin_angle": 0.0,
            "excellon_editor_slot_circ_dir": 'CW',
            "excellon_editor_slot_circ_angle": 0.0,

            # Geometry General
            "geometry_plot": True,
            "geometry_circle_steps": 128,
            "geometry_cnctooldia": "0.0944882",

            # Geometry Options
            "geometry_cutz": -0.0944882,
            "geometry_vtipdia": 0.1,
            "geometry_vtipangle": 30,
            "geometry_multidepth": False,
            "geometry_depthperpass": 0.0314961,
            "geometry_travelz": 0.0787402,
            "geometry_toolchange": False,
            "geometry_toolchangez": 0.5,
            "geometry_endz": 0.5,
            "geometry_feedrate": 3.14961,
            "geometry_feedrate_z": 3.14961,
            "geometry_spindlespeed": None,
            "geometry_dwell": False,
            "geometry_dwelltime": 1,
            "geometry_ppname_g": 'default',

            # Geometry Advanced Options
            "geometry_toolchangexy": "0.0, 0.0",
            "geometry_startz": None,
            "geometry_feedrate_rapid": 3.14961,
            "geometry_extracut": False,
            "geometry_z_pdepth": -0.02,
            "geometry_f_plunge": False,
            "geometry_spindledir": 'CW',
            "geometry_feedrate_probe": 3.14961,
            "geometry_segx": 0.0,
            "geometry_segy": 0.0,

            # Geometry Editor
            "geometry_editor_sel_limit": 30,

            # CNC Job General
            "cncjob_plot": True,
            "cncjob_plot_kind": 'all',
            "cncjob_annotation": True,
            "cncjob_tooldia": 0.0393701,
            "cncjob_coords_type": "G90",
            "cncjob_coords_decimals": 4,
            "cncjob_fr_decimals": 2,
            "cncjob_steps_per_circle": 128,

            # CNC Job Options
            "cncjob_prepend": "",
            "cncjob_append": "",

            # CNC Job Advanced Options
            "cncjob_toolchange_macro": "",
            "cncjob_toolchange_macro_enable": False,
            "cncjob_annotation_fontsize": 9,
            "cncjob_annotation_fontcolor": '#990000',

            # NCC Tool
            "tools_ncctools": "0.0393701, 0.019685",
            "tools_nccorder": 'rev',
            "tools_nccoverlap": 0.015748,
            "tools_nccmargin": 0.0393701,
            "tools_nccmethod": "seed",
            "tools_nccconnect": True,
            "tools_ncccontour": True,
            "tools_nccrest": False,
            "tools_ncc_offset_choice": False,
            "tools_ncc_offset_value": 0.0000,
            "tools_nccref": 'itself',
            "tools_ncc_plotting": 'normal',
            "tools_nccmilling_type": 'cl',
            "tools_ncctool_type": 'V',
            "tools_ncccutz": -0.001968504,
            "tools_ncctipdia": 0.00393701,
            "tools_ncctipangle": 30,

            # Cutout Tool
            "tools_cutouttooldia": 0.0944882,
            "tools_cutoutkind": "single",
            "tools_cutoutmargin": 0.00393701,
            "tools_cutoutgapsize": 0.15748,
            "tools_gaps_ff": "4",
            "tools_cutout_convexshape": False,

            # Paint Tool
            "tools_painttooldia": 0.023622,
            "tools_paintorder": 'rev',
            "tools_paintoverlap": 0.015748,
            "tools_paintmargin": 0.0,
            "tools_paintmethod": "seed",
            "tools_selectmethod": "single",
            "tools_pathconnect": True,
            "tools_paintcontour": True,
            "tools_paint_plotting": 'normal',

            # 2-Sided Tool
            "tools_2sided_mirror_axis": "X",
            "tools_2sided_axis_loc": "point",
            "tools_2sided_drilldia": 0.0393701,

            # Film Tool
            "tools_film_type": 'neg',
            "tools_film_boundary": 0.0393701,
            "tools_film_scale": 0,
            "tools_film_color": '#000000',

            # Panel Tool
            "tools_panelize_spacing_columns": 0,
            "tools_panelize_spacing_rows": 0,
            "tools_panelize_columns": 1,
            "tools_panelize_rows": 1,
            "tools_panelize_constrain": False,
            "tools_panelize_constrainx": 0.0,
            "tools_panelize_constrainy": 0.0,
            "tools_panelize_panel_type": 'gerber',

            # Calculators Tool
            "tools_calc_vshape_tip_dia": 0.007874,
            "tools_calc_vshape_tip_angle": 30,
            "tools_calc_vshape_cut_z": 0.000787,
            "tools_calc_electro_length": 10.0,
            "tools_calc_electro_width": 10.0,
            "tools_calc_electro_cdensity": 13.0,
            "tools_calc_electro_growth": 10.0,

            # Transform Tool
            "tools_transform_rotate": 90,
            "tools_transform_skew_x": 0.0,
            "tools_transform_skew_y": 0.0,
            "tools_transform_scale_x": 1.0,
            "tools_transform_scale_y": 1.0,
            "tools_transform_scale_link": True,
            "tools_transform_scale_reference": True,
            "tools_transform_offset_x": 0.0,
            "tools_transform_offset_y": 0.0,
            "tools_transform_mirror_reference": False,
            "tools_transform_mirror_point": (0, 0),

            # SolderPaste Tool
            "tools_solderpaste_tools": "0.0393701, 0.011811",
            "tools_solderpaste_new": 0.011811,
            "tools_solderpaste_z_start": 0.00019685039,
            "tools_solderpaste_z_dispense": 0.00393701,
            "tools_solderpaste_z_stop": 0.00019685039,
            "tools_solderpaste_z_travel": 0.00393701,
            "tools_solderpaste_z_toolchange": 0.0393701,
            "tools_solderpaste_xy_toolchange": "0.0, 0.0",
            "tools_solderpaste_frxy": 3.0,
            "tools_solderpaste_frz": 3.0,
            "tools_solderpaste_frz_dispense": 0.0393701,
            "tools_solderpaste_speedfwd": 20,
            "tools_solderpaste_dwellfwd": 1,
            "tools_solderpaste_speedrev": 10,
            "tools_solderpaste_dwellrev": 1,
            "tools_solderpaste_pp": 'Paste_1',

            # Subtract Tool
            "tools_sub_close_paths": True,

            # file associations
            "fa_excellon": 'drd, drl, exc, ncd, tap, xln',
            "fa_gcode": 'cnc, din, dnc, ecs, eia, fan, fgc, fnc, gc, gcd, gcode, h, hnc, i, min, mpf, mpr, nc, ncc, '
                        'ncg, ncp, out, plt, ply, rol, sbp, tap, xpi',
            "fa_gerber": 'art, bot, bsm, cmp, crc, crs, dim, g4, gb0, gb1, gb2, gb3, gb5, gb6, gb7, gb8, gb9, gbd, '
                         'gbl, gbo, gbp, gbr, gbs, gdo, ger, gko, gm1, gm2, gm3, grb, gtl, gto, gtp, gts, ly15, ly2, '
                         'mil, pho, plc, pls, smb, smt, sol, spb, spt, ssb, sst, stc, sts, top, tsm'
,
        })

        # ############################################################
        # ############### Load defaults from file ####################
        # ############################################################

        if user_defaults:
            self.load_defaults(filename='current_defaults')

        # #############################################################
        # ############## APPLY APP LANGUAGE ###########################
        # #############################################################

        ret_val = fcTranslate.apply_language('strings')

        if ret_val == "no language":
            self.inform.emit('[ERROR] %s' %
                             _("Could not find the Language files. The App strings are missing."))
            log.debug("Could not find the Language files. The App strings are missing.")
        else:
            # make the current language the current selection on the language combobox
            self.ui.general_defaults_form.general_app_group.language_cb.setCurrentText(ret_val)
            log.debug("App.__init__() --> Applied %s language." % str(ret_val).capitalize())

        # ##############################################################
        # ################# CREATE UNIQUE SERIAL NUMBER ################
        # ##############################################################

        chars = 'abcdefghijklmnopqrstuvwxyz0123456789'
        if self.defaults['global_serial'] == 0 or len(str(self.defaults['global_serial'])) < 10:
            self.defaults['global_serial'] = ''.join([random.choice(chars) for i in range(20)])
            self.save_defaults(silent=True)

        self.propagate_defaults(silent=True)
        self.restore_main_win_geom()

        def auto_save_defaults():
            try:
                self.save_defaults(silent=True)
                self.propagate_defaults(silent=True)
            finally:
                QtCore.QTimer.singleShot(self.defaults["global_defaults_save_period_ms"], auto_save_defaults)

        # the following lines activates automatic defaults save
        # if user_defaults:
        #     QtCore.QTimer.singleShot(self.defaults["global_defaults_save_period_ms"], auto_save_defaults)

        # self.options_form = PreferencesUI()

        self.options_form_fields = {
            "units": self.ui.general_options_form.general_app_group.units_radio,
            "global_gridx": self.ui.general_options_form.general_gui_group.gridx_entry,
            "global_gridy": self.ui.general_options_form.general_gui_group.gridy_entry,
            "global_snap_max": self.ui.general_options_form.general_gui_group.snap_max_dist_entry,

            "gerber_plot": self.ui.gerber_options_form.gerber_gen_group.plot_cb,
            "gerber_solid": self.ui.gerber_options_form.gerber_gen_group.solid_cb,
            "gerber_multicolored": self.ui.gerber_options_form.gerber_gen_group.multicolored_cb,

            "gerber_isotooldia": self.ui.gerber_options_form.gerber_opt_group.iso_tool_dia_entry,
            "gerber_isopasses": self.ui.gerber_options_form.gerber_opt_group.iso_width_entry,
            "gerber_isooverlap": self.ui.gerber_options_form.gerber_opt_group.iso_overlap_entry,
            "gerber_combine_passes": self.ui.gerber_options_form.gerber_opt_group.combine_passes_cb,
            "gerber_noncoppermargin": self.ui.gerber_options_form.gerber_opt_group.noncopper_margin_entry,
            "gerber_noncopperrounded": self.ui.gerber_options_form.gerber_opt_group.noncopper_rounded_cb,
            "gerber_bboxmargin": self.ui.gerber_options_form.gerber_opt_group.bbmargin_entry,
            "gerber_bboxrounded": self.ui.gerber_options_form.gerber_opt_group.bbrounded_cb,

            "excellon_plot": self.ui.excellon_options_form.excellon_gen_group.plot_cb,
            "excellon_solid": self.ui.excellon_options_form.excellon_gen_group.solid_cb,
            "excellon_format_upper_in": self.ui.excellon_options_form.excellon_gen_group.excellon_format_upper_in_entry,
            "excellon_format_lower_in": self.ui.excellon_options_form.excellon_gen_group.excellon_format_lower_in_entry,
            "excellon_format_upper_mm": self.ui.excellon_options_form.excellon_gen_group.excellon_format_upper_mm_entry,
            "excellon_format_lower_mm": self.ui.excellon_options_form.excellon_gen_group.excellon_format_lower_mm_entry,
            "excellon_zeros": self.ui.excellon_options_form.excellon_gen_group.excellon_zeros_radio,
            "excellon_units": self.ui.excellon_options_form.excellon_gen_group.excellon_units_radio,
            "excellon_optimization_type": self.ui.excellon_options_form.excellon_gen_group.excellon_optimization_radio,

            "excellon_drillz": self.ui.excellon_options_form.excellon_opt_group.cutz_entry,
            "excellon_travelz": self.ui.excellon_options_form.excellon_opt_group.travelz_entry,
            "excellon_endz": self.ui.excellon_options_form.excellon_opt_group.eendz_entry,
            "excellon_feedrate": self.ui.excellon_options_form.excellon_opt_group.feedrate_entry,
            "excellon_spindlespeed": self.ui.excellon_options_form.excellon_opt_group.spindlespeed_entry,
            "excellon_dwell": self.ui.excellon_options_form.excellon_opt_group.dwell_cb,
            "excellon_dwelltime": self.ui.excellon_options_form.excellon_opt_group.dwelltime_entry,
            "excellon_toolchange": self.ui.excellon_options_form.excellon_opt_group.toolchange_cb,
            "excellon_toolchangez": self.ui.excellon_options_form.excellon_opt_group.toolchangez_entry,
            "excellon_tooldia": self.ui.excellon_options_form.excellon_opt_group.tooldia_entry,
            "excellon_ppname_e": self.ui.excellon_options_form.excellon_opt_group.pp_excellon_name_cb,

            "excellon_feedrate_rapid": self.ui.excellon_options_form.excellon_adv_opt_group.feedrate_rapid_entry,
            "excellon_toolchangexy": self.ui.excellon_options_form.excellon_adv_opt_group.toolchangexy_entry,
            "excellon_f_plunge": self.ui.excellon_options_form.excellon_adv_opt_group.fplunge_cb,
            "excellon_startz": self.ui.excellon_options_form.excellon_adv_opt_group.estartz_entry,
            "excellon_spindledir": self.ui.excellon_options_form.excellon_adv_opt_group.spindledir_radio,

            "geometry_plot": self.ui.geometry_options_form.geometry_gen_group.plot_cb,
            "geometry_cnctooldia": self.ui.geometry_options_form.geometry_gen_group.cnctooldia_entry,

            "geometry_cutz": self.ui.geometry_options_form.geometry_opt_group.cutz_entry,
            "geometry_travelz": self.ui.geometry_options_form.geometry_opt_group.travelz_entry,
            "geometry_feedrate": self.ui.geometry_options_form.geometry_opt_group.cncfeedrate_entry,
            "geometry_feedrate_z": self.ui.geometry_options_form.geometry_opt_group.cncplunge_entry,
            "geometry_spindlespeed": self.ui.geometry_options_form.geometry_opt_group.cncspindlespeed_entry,
            "geometry_dwell": self.ui.geometry_options_form.geometry_opt_group.dwell_cb,
            "geometry_dwelltime": self.ui.geometry_options_form.geometry_opt_group.dwelltime_entry,
            "geometry_ppname_g": self.ui.geometry_options_form.geometry_opt_group.pp_geometry_name_cb,
            "geometry_toolchange": self.ui.geometry_options_form.geometry_opt_group.toolchange_cb,
            "geometry_toolchangez": self.ui.geometry_options_form.geometry_opt_group.toolchangez_entry,
            "geometry_endz": self.ui.geometry_options_form.geometry_opt_group.gendz_entry,
            "geometry_depthperpass": self.ui.geometry_options_form.geometry_opt_group.depthperpass_entry,
            "geometry_multidepth": self.ui.geometry_options_form.geometry_opt_group.multidepth_cb,

            "geometry_segx": self.ui.geometry_options_form.geometry_adv_opt_group.segx_entry,
            "geometry_segy": self.ui.geometry_options_form.geometry_adv_opt_group.segy_entry,
            "geometry_feedrate_rapid": self.ui.geometry_options_form.geometry_adv_opt_group.cncfeedrate_rapid_entry,
            "geometry_f_plunge": self.ui.geometry_options_form.geometry_adv_opt_group.fplunge_cb,
            "geometry_spindledir": self.ui.geometry_options_form.geometry_adv_opt_group.spindledir_radio,
            "geometry_toolchangexy": self.ui.geometry_options_form.geometry_adv_opt_group.toolchangexy_entry,
            "geometry_startz": self.ui.geometry_options_form.geometry_adv_opt_group.gstartz_entry,
            "geometry_extracut": self.ui.geometry_options_form.geometry_adv_opt_group.extracut_cb,

            "cncjob_plot": self.ui.cncjob_options_form.cncjob_gen_group.plot_cb,
            "cncjob_tooldia": self.ui.cncjob_options_form.cncjob_gen_group.tooldia_entry,

            "cncjob_prepend": self.ui.cncjob_options_form.cncjob_opt_group.prepend_text,
            "cncjob_append": self.ui.cncjob_options_form.cncjob_opt_group.append_text,

            "tools_ncctools": self.ui.tools_options_form.tools_ncc_group.ncc_tool_dia_entry,
            "tools_nccoverlap": self.ui.tools_options_form.tools_ncc_group.ncc_overlap_entry,
            "tools_nccmargin": self.ui.tools_options_form.tools_ncc_group.ncc_margin_entry,

            "tools_cutouttooldia": self.ui.tools_options_form.tools_cutout_group.cutout_tooldia_entry,
            "tools_cutoutmargin": self.ui.tools_options_form.tools_cutout_group.cutout_margin_entry,
            "tools_cutoutgapsize": self.ui.tools_options_form.tools_cutout_group.cutout_gap_entry,
            "tools_gaps_ff": self.ui.tools_options_form.tools_cutout_group.gaps_combo,

            "tools_painttooldia": self.ui.tools_options_form.tools_paint_group.painttooldia_entry,
            "tools_paintoverlap": self.ui.tools_options_form.tools_paint_group.paintoverlap_entry,
            "tools_paintmargin": self.ui.tools_options_form.tools_paint_group.paintmargin_entry,
            "tools_paintmethod": self.ui.tools_options_form.tools_paint_group.paintmethod_combo,
            "tools_selectmethod": self.ui.tools_options_form.tools_paint_group.selectmethod_combo,
            "tools_pathconnect": self.ui.tools_options_form.tools_paint_group.pathconnect_cb,
            "tools_paintcontour": self.ui.tools_options_form.tools_paint_group.contour_cb,

            "tools_2sided_mirror_axis": self.ui.tools_options_form.tools_2sided_group.mirror_axis_radio,
            "tools_2sided_axis_loc": self.ui.tools_options_form.tools_2sided_group.axis_location_radio,
            "tools_2sided_drilldia": self.ui.tools_options_form.tools_2sided_group.drill_dia_entry,

            "tools_film_type": self.ui.tools_options_form.tools_film_group.film_type_radio,
            "tools_film_boundary": self.ui.tools_options_form.tools_film_group.film_boundary_entry,
            "tools_film_scale": self.ui.tools_options_form.tools_film_group.film_scale_entry,

            "tools_panelize_spacing_columns": self.ui.tools_options_form.tools_panelize_group.pspacing_columns,
            "tools_panelize_spacing_rows": self.ui.tools_options_form.tools_panelize_group.pspacing_rows,
            "tools_panelize_columns": self.ui.tools_options_form.tools_panelize_group.pcolumns,
            "tools_panelize_rows": self.ui.tools_options_form.tools_panelize_group.prows,
            "tools_panelize_constrain": self.ui.tools_options_form.tools_panelize_group.pconstrain_cb,
            "tools_panelize_constrainx": self.ui.tools_options_form.tools_panelize_group.px_width_entry,
            "tools_panelize_constrainy": self.ui.tools_options_form.tools_panelize_group.py_height_entry

        }

        for name in list(self.postprocessors.keys()):
            self.ui.geometry_options_form.geometry_opt_group.pp_geometry_name_cb.addItem(name)
            self.ui.excellon_options_form.excellon_opt_group.pp_excellon_name_cb.addItem(name)

        self.options = LoudDict()
        self.options.set_change_callback(self.on_options_dict_change)
        self.options.update({
            "units": "IN",
            "global_gridx": 1.0,
            "global_gridy": 1.0,
            "global_snap_max": 0.05,
            "global_background_timeout": 300000,  # Default value is 5 minutes
            "global_verbose_error_level": 0,  # Shell verbosity:
            # 0 = default(python trace only for unknown errors),
            # 1 = show trace(show trace allways), 2 = (For the future).

            "gerber_plot": True,
            "gerber_solid": True,
            "gerber_multicolored": False,
            "gerber_isotooldia": 0.016,
            "gerber_isopasses": 1,
            "gerber_isooverlap": 0.15,
            "gerber_combine_passes": True,
            "gerber_noncoppermargin": 0.0,
            "gerber_noncopperrounded": False,
            "gerber_bboxmargin": 0.0,
            "gerber_bboxrounded": False,

            "excellon_plot": True,
            "excellon_solid": False,
            "excellon_format_upper_in": 2,
            "excellon_format_lower_in": 4,
            "excellon_format_upper_mm": 3,
            "excellon_format_lower_mm": 3,
            "excellon_units": 'INCH',
            "excellon_optimization_type": 'B',
            "excellon_search_time": 3,
            "excellon_zeros": "L",

            "excellon_drillz": -0.1,
            "excellon_travelz": 0.1,
            "excellon_feedrate": 3.0,
            "excellon_feedrate_rapid": 3.0,
            "excellon_spindlespeed": None,
            "excellon_spindledir": 'CW',
            "excellon_dwell": True,
            "excellon_dwelltime": 1000,
            "excellon_toolchange": False,
            "excellon_toolchangez": 1.0,
            "excellon_toolchangexy": "0.0, 0.0",
            "excellon_tooldia": 0.016,
            "excellon_ppname_e": 'default',
            "excellon_f_plunge": False,
            "excellon_startz": None,
            "excellon_endz": 2.0,

            "geometry_plot": True,
            "geometry_segx": 0.0,
            "geometry_segy": 0.0,
            "geometry_cutz": -0.002,
            "geometry_vtipdia": 0.1,
            "geometry_vtipangle": 30,
            "geometry_travelz": 0.1,
            "geometry_feedrate": 3.0,
            "geometry_feedrate_z": 3.0,
            "geometry_feedrate_rapid": 3.0,
            "geometry_spindlespeed": None,
            "geometry_spindledir": 'CW',
            "geometry_dwell": True,
            "geometry_dwelltime": 1000,
            "geometry_cnctooldia": 0.016,
            "geometry_toolchange": False,
            "geometry_toolchangez": 2.0,
            "geometry_toolchangexy": "0.0, 0.0",
            "geometry_startz": None,
            "geometry_endz": 2.0,
            "geometry_ppname_g": "default",
            "geometry_f_plunge": False,
            "geometry_depthperpass": 0.002,
            "geometry_multidepth": False,
            "geometry_extracut": False,

            "cncjob_plot": True,
            "cncjob_tooldia": 0.016,
            "cncjob_prepend": "",
            "cncjob_append": "",

            "tools_ncctools": "1.0, 0.5",
            "tools_nccoverlap": 0.4,
            "tools_nccmargin": 1,

            "tools_cutouttooldia": 0.07,
            "tools_cutoutmargin": 0.1,
            "tools_cutoutgapsize": 0.15,
            "tools_gaps_ff": "8",

            "tools_painttooldia": 0.07,
            "tools_paintoverlap": 0.15,
            "tools_paintmargin": 0.0,
            "tools_paintmethod": "seed",
            "tools_selectmethod": "single",
            "tools_pathconnect": True,
            "tools_paintcontour": True,

            "tools_2sided_mirror_axis": "X",
            "tools_2sided_axis_loc": 'point',
            "tools_2sided_drilldia": 1,

            "tools_film_type": 'neg',
            "tools_film_boundary": 1,
            "tools_film_scale": 0,

            "tools_panelize_spacing_columns": 0,
            "tools_panelize_spacing_rows": 0,
            "tools_panelize_columns": 1,
            "tools_panelize_rows": 1,
            "tools_panelize_constrain": False,
            "tools_panelize_constrainx": 0.0,
            "tools_panelize_constrainy": 0.0

        })

        self.options.update(self.defaults)  # Copy app defaults to project options

        self.gen_form = None
        self.ger_form = None
        self.exc_form = None
        self.geo_form = None
        self.cnc_form = None
        self.tools_form = None
        self.fa_form = None
        self.on_options_combo_change(0)  # Will show the initial form

        # ################################

        # ### Initialize the color box's color in Preferences -> Global -> Color
        # Init Plot Colors
        self.ui.general_defaults_form.general_gui_group.pf_color_entry.set_value(self.defaults['global_plot_fill'])
        self.ui.general_defaults_form.general_gui_group.pf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_plot_fill'])[:7])
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_spinner.set_value(
            int(self.defaults['global_plot_fill'][7:9], 16))
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_slider.setValue(
            int(self.defaults['global_plot_fill'][7:9], 16))

        self.ui.general_defaults_form.general_gui_group.pl_color_entry.set_value(self.defaults['global_plot_line'])
        self.ui.general_defaults_form.general_gui_group.pl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_plot_line'])[:7])

        # Init Left-Right Selection colors
        self.ui.general_defaults_form.general_gui_group.sf_color_entry.set_value(self.defaults['global_sel_fill'])
        self.ui.general_defaults_form.general_gui_group.sf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_fill'])[:7])
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_spinner.set_value(
            int(self.defaults['global_sel_fill'][7:9], 16))
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_slider.setValue(
            int(self.defaults['global_sel_fill'][7:9], 16))

        self.ui.general_defaults_form.general_gui_group.sl_color_entry.set_value(self.defaults['global_sel_line'])
        self.ui.general_defaults_form.general_gui_group.sl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_line'])[:7])

        # Init Right-Left Selection colors
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_entry.set_value(
            self.defaults['global_alt_sel_fill'])
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_alt_sel_fill'])[:7])
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_spinner.set_value(
            int(self.defaults['global_sel_fill'][7:9], 16))
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_slider.setValue(
            int(self.defaults['global_sel_fill'][7:9], 16))

        self.ui.general_defaults_form.general_gui_group.alt_sl_color_entry.set_value(
            self.defaults['global_alt_sel_line'])
        self.ui.general_defaults_form.general_gui_group.alt_sl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_alt_sel_line'])[:7])

        # Init Draw color and Selection Draw Color
        self.ui.general_defaults_form.general_gui_group.draw_color_entry.set_value(
            self.defaults['global_draw_color'])
        self.ui.general_defaults_form.general_gui_group.draw_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_draw_color'])[:7])

        self.ui.general_defaults_form.general_gui_group.sel_draw_color_entry.set_value(
            self.defaults['global_sel_draw_color'])
        self.ui.general_defaults_form.general_gui_group.sel_draw_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_draw_color'])[:7])

        # Init Project Items color
        self.ui.general_defaults_form.general_gui_group.proj_color_entry.set_value(
            self.defaults['global_proj_item_color'])
        self.ui.general_defaults_form.general_gui_group.proj_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_proj_item_color'])[:7])

        self.ui.general_defaults_form.general_gui_group.proj_color_dis_entry.set_value(
            self.defaults['global_proj_item_dis_color'])
        self.ui.general_defaults_form.general_gui_group.proj_color_dis_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_proj_item_dis_color'])[:7])

        # Init the Annotation CNC Job color
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_entry.set_value(
            self.defaults['cncjob_annotation_fontcolor'])
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['cncjob_annotation_fontcolor'])[:7])

        # Init the Tool Film color
        self.ui.tools_defaults_form.tools_film_group.film_color_entry.set_value(
            self.defaults['tools_film_color'])
        self.ui.tools_defaults_form.tools_film_group.film_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['tools_film_color'])[:7])

        # ### End of Data ####

        # ###############################################
        # ############# SETUP Plot Area #################
        # ###############################################
        if show_splash:
            self.splash.showMessage(_("FlatCAM is initializing ...\n"
                                      "Canvas initialization started."),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))
        start_plot_time = time.time()   # debug
        self.plotcanvas = None
        self.app_cursor = None
        self.hover_shapes = None
        self.on_plotcanvas_setup()
        end_plot_time = time.time()
        self.used_time = end_plot_time - start_plot_time
        self.log.debug("Finished Canvas initialization in %s seconds." % str(self.used_time))
        if show_splash:
            self.splash.showMessage('%s: %ssec' % (_("FlatCAM is initializing ...\n"
                                                     "Canvas initialization started.\n"
                                                     "Canvas initialization finished in"), '%.2f' % self.used_time),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))
        self.ui.splitter.setStretchFactor(1, 2)

        # to use for tools like Measurement tool who depends on the event sources who are changed inside the Editors
        # depending on from where those tools are called different actions can be done
        self.call_source = 'app'

        # ##############################################
        # ######### SETUP OBJECT COLLECTION ############
        # ##############################################

        self.collection = ObjectCollection(self)
        self.ui.project_tab_layout.addWidget(self.collection.view)

        # ### Adjust tabs width ## ##
        # self.collection.view.setMinimumWidth(self.ui.options_scroll_area.widget().sizeHint().width() +
        #     self.ui.options_scroll_area.verticalScrollBar().sizeHint().width())
        self.collection.view.setMinimumWidth(290)
        self.log.debug("Finished creating Object Collection.")

        # ###############################################
        # ############# Worker SETUP ####################
        # ###############################################

        if self.defaults["global_worker_number"]:
            self.workers = WorkerStack(workers_number=int(self.defaults["global_worker_number"]))
        else:
            self.workers = WorkerStack(workers_number=2)
        self.worker_task.connect(self.workers.add_task)
        self.log.debug("Finished creating Workers crew.")

        # ################################################
        # ############### Signal handling ################
        # ################################################

        # ############# Custom signals  ##################

        # signal for displaying messages in status bar
        self.inform.connect(self.info)
        # signal to be called when the app is quiting
        self.app_quit.connect(self.quit_application)
        self.message.connect(self.message_dialog)
        self.progress.connect(self.set_progress_bar)

        # signals that are emitted when object state changes
        self.object_created.connect(self.on_object_created)
        self.object_changed.connect(self.on_object_changed)
        self.object_plotted.connect(self.on_object_plotted)
        self.plots_updated.connect(self.on_plots_updated)

        # signals emitted when file state change
        self.file_opened.connect(self.register_recent)
        self.file_opened.connect(lambda kind, filename: self.register_folder(filename))
        self.file_saved.connect(lambda kind, filename: self.register_save_folder(filename))

        # ############# Standard signals ###################
        # ### Menu
        self.ui.menufilenewproject.triggered.connect(self.on_file_new_click)
        self.ui.menufilenewgeo.triggered.connect(self.new_geometry_object)
        self.ui.menufilenewgrb.triggered.connect(self.new_gerber_object)
        self.ui.menufilenewexc.triggered.connect(self.new_excellon_object)

        self.ui.menufileopengerber.triggered.connect(self.on_fileopengerber)
        self.ui.menufileopenexcellon.triggered.connect(self.on_fileopenexcellon)
        self.ui.menufileopengcode.triggered.connect(self.on_fileopengcode)
        self.ui.menufileopenproject.triggered.connect(self.on_file_openproject)
        self.ui.menufileopenconfig.triggered.connect(self.on_file_openconfig)

        self.ui.menufilenewscript.triggered.connect(self.on_filenewscript)
        self.ui.menufileopenscript.triggered.connect(self.on_fileopenscript)

        self.ui.menufilerunscript.triggered.connect(self.on_filerunscript)

        self.ui.menufileimportsvg.triggered.connect(lambda: self.on_file_importsvg("geometry"))
        self.ui.menufileimportsvg_as_gerber.triggered.connect(lambda: self.on_file_importsvg("gerber"))

        self.ui.menufileimportdxf.triggered.connect(lambda: self.on_file_importdxf("geometry"))
        self.ui.menufileimportdxf_as_gerber.triggered.connect(lambda: self.on_file_importdxf("gerber"))

        self.ui.menufileexportsvg.triggered.connect(self.on_file_exportsvg)
        self.ui.menufileexportpng.triggered.connect(self.on_file_exportpng)
        self.ui.menufileexportexcellon.triggered.connect(self.on_file_exportexcellon)
        self.ui.menufileexportgerber.triggered.connect(self.on_file_exportgerber)

        self.ui.menufileexportdxf.triggered.connect(self.on_file_exportdxf)

        self.ui.menufilesaveproject.triggered.connect(self.on_file_saveproject)
        self.ui.menufilesaveprojectas.triggered.connect(self.on_file_saveprojectas)
        self.ui.menufilesaveprojectcopy.triggered.connect(lambda: self.on_file_saveprojectas(make_copy=True))
        self.ui.menufilesavedefaults.triggered.connect(self.on_file_savedefaults)

        self.ui.menufileexportpref.triggered.connect(self.on_export_preferences)
        self.ui.menufileimportpref.triggered.connect(self.on_import_preferences)

        self.ui.menufile_exit.triggered.connect(self.final_save)

        self.ui.menueditedit.triggered.connect(lambda: self.object2editor())
        self.ui.menueditok.triggered.connect(lambda: self.editor2object())

        self.ui.menuedit_convertjoin.triggered.connect(self.on_edit_join)
        self.ui.menuedit_convertjoinexc.triggered.connect(self.on_edit_join_exc)
        self.ui.menuedit_convertjoingrb.triggered.connect(self.on_edit_join_grb)

        self.ui.menuedit_convert_sg2mg.triggered.connect(self.on_convert_singlegeo_to_multigeo)
        self.ui.menuedit_convert_mg2sg.triggered.connect(self.on_convert_multigeo_to_singlegeo)

        self.ui.menueditdelete.triggered.connect(self.on_delete)

        self.ui.menueditcopyobject.triggered.connect(self.on_copy_object)
        self.ui.menueditconvert_any2geo.triggered.connect(self.convert_any2geo)
        self.ui.menueditconvert_any2gerber.triggered.connect(self.convert_any2gerber)

        self.ui.menueditorigin.triggered.connect(self.on_set_origin)
        self.ui.menueditjump.triggered.connect(self.on_jump_to)

        self.ui.menuedittoggleunits.triggered.connect(self.on_toggle_units_click)
        self.ui.menueditselectall.triggered.connect(self.on_selectall)
        self.ui.menueditpreferences.triggered.connect(self.on_preferences)

        # self.ui.menuoptions_transfer_a2o.triggered.connect(self.on_options_app2object)
        # self.ui.menuoptions_transfer_a2p.triggered.connect(self.on_options_app2project)
        # self.ui.menuoptions_transfer_o2a.triggered.connect(self.on_options_object2app)
        # self.ui.menuoptions_transfer_p2a.triggered.connect(self.on_options_project2app)
        # self.ui.menuoptions_transfer_o2p.triggered.connect(self.on_options_object2project)
        # self.ui.menuoptions_transfer_p2o.triggered.connect(self.on_options_project2object)

        self.ui.menuoptions_transform_rotate.triggered.connect(self.on_rotate)

        self.ui.menuoptions_transform_skewx.triggered.connect(self.on_skewx)
        self.ui.menuoptions_transform_skewy.triggered.connect(self.on_skewy)

        self.ui.menuoptions_transform_flipx.triggered.connect(self.on_flipx)
        self.ui.menuoptions_transform_flipy.triggered.connect(self.on_flipy)
        self.ui.menuoptions_view_source.triggered.connect(self.on_view_source)

        self.ui.menuviewdisableall.triggered.connect(self.disable_all_plots)
        self.ui.menuviewdisableother.triggered.connect(self.disable_other_plots)
        self.ui.menuviewenable.triggered.connect(self.enable_all_plots)

        self.ui.menuview_zoom_fit.triggered.connect(self.on_zoom_fit)
        self.ui.menuview_zoom_in.triggered.connect(self.on_zoom_in)
        self.ui.menuview_zoom_out.triggered.connect(self.on_zoom_out)
        self.ui.menuview_replot.triggered.connect(self.plot_all)

        self.ui.menuview_toggle_code_editor.triggered.connect(self.on_toggle_code_editor)
        self.ui.menuview_toggle_fscreen.triggered.connect(self.on_fullscreen)
        self.ui.menuview_toggle_parea.triggered.connect(self.on_toggle_plotarea)
        self.ui.menuview_toggle_notebook.triggered.connect(self.on_toggle_notebook)

        self.ui.menuview_toggle_grid.triggered.connect(self.on_toggle_grid)
        self.ui.menuview_toggle_axis.triggered.connect(self.on_toggle_axis)
        self.ui.menuview_toggle_workspace.triggered.connect(self.on_workspace_menu)

        self.ui.menutoolshell.triggered.connect(self.on_toggle_shell)

        self.ui.menuhelp_about.triggered.connect(self.on_about)
        self.ui.menuhelp_home.triggered.connect(lambda: webbrowser.open(self.app_url))
        self.ui.menuhelp_manual.triggered.connect(lambda: webbrowser.open(self.manual_url))
        self.ui.menuhelp_report_bug.triggered.connect(lambda: webbrowser.open(self.bug_report_url))
        self.ui.menuhelp_exc_spec.triggered.connect(lambda: webbrowser.open(self.excellon_spec_url))
        self.ui.menuhelp_gerber_spec.triggered.connect(lambda: webbrowser.open(self.gerber_spec_url))
        self.ui.menuhelp_videohelp.triggered.connect(lambda: webbrowser.open(self.video_url))
        self.ui.menuhelp_shortcut_list.triggered.connect(self.on_shortcut_list)

        self.ui.menuprojectenable.triggered.connect(self.on_enable_sel_plots)
        self.ui.menuprojectdisable.triggered.connect(self.on_disable_sel_plots)
        self.ui.menuprojectgeneratecnc.triggered.connect(lambda: self.generate_cnc_job(self.collection.get_selected()))
        self.ui.menuprojectviewsource.triggered.connect(self.on_view_source)

        self.ui.menuprojectcopy.triggered.connect(self.on_copy_object)
        self.ui.menuprojectedit.triggered.connect(self.object2editor)

        self.ui.menuprojectdelete.triggered.connect(self.on_delete)
        self.ui.menuprojectsave.triggered.connect(self.on_project_context_save)
        self.ui.menuprojectproperties.triggered.connect(self.obj_properties)

        # ToolBar signals
        self.connect_toolbar_signals()

        # Notebook signals
        # make the right click on the notebook tab connect to a function
        self.ui.notebook.setupContextMenu()
        self.ui.notebook.addContextMenu(
            _("Detachable Tabs"), self.on_notebook_tab_rmb_click,
            initial_checked=self.defaults["global_tabs_detachable"])
        # activate initial state
        self.on_notebook_tab_rmb_click(self.defaults["global_tabs_detachable"])

        # Context Menu
        self.ui.popmenu_disable.triggered.connect(lambda: self.toggle_plots(self.collection.get_selected()))
        self.ui.popmenu_panel_toggle.triggered.connect(self.on_toggle_notebook)

        self.ui.popmenu_new_geo.triggered.connect(self.new_geometry_object)
        self.ui.popmenu_new_grb.triggered.connect(self.new_gerber_object)
        self.ui.popmenu_new_exc.triggered.connect(self.new_excellon_object)
        self.ui.popmenu_new_prj.triggered.connect(self.on_file_new)

        self.ui.zoomfit.triggered.connect(self.on_zoom_fit)
        self.ui.clearplot.triggered.connect(self.clear_plots)
        self.ui.replot.triggered.connect(self.plot_all)

        self.ui.popmenu_copy.triggered.connect(self.on_copy_object)
        self.ui.popmenu_delete.triggered.connect(self.on_delete)
        self.ui.popmenu_edit.triggered.connect(self.object2editor)
        self.ui.popmenu_save.triggered.connect(lambda: self.editor2object())
        self.ui.popmenu_move.triggered.connect(self.obj_move)

        self.ui.popmenu_properties.triggered.connect(self.obj_properties)

        # Preferences Plot Area TAB
        self.ui.options_combo.activated.connect(self.on_options_combo_change)
        self.ui.pref_save_button.clicked.connect(self.on_save_button)
        self.ui.pref_import_button.clicked.connect(self.on_import_preferences)
        self.ui.pref_export_button.clicked.connect(self.on_export_preferences)
        self.ui.pref_open_button.clicked.connect(self.on_preferences_open_folder)

        # ##############################
        # ### GUI PREFERENCES SIGNALS ##
        # ##############################
        self.ui.general_options_form.general_app_group.units_radio.group_toggle_fn = self.on_toggle_units
        self.ui.general_defaults_form.general_app_group.language_apply_btn.clicked.connect(
            lambda: fcTranslate.on_language_apply_click(self, restart=True)
        )
        self.ui.general_defaults_form.general_app_group.units_radio.activated_custom.connect(
            lambda: self.on_toggle_units(no_pref=False))

        # ###############################################################
        # ################### GUI COLORS SIGNALS ########################
        # ###############################################################

        # Setting plot colors signals
        self.ui.general_defaults_form.general_gui_group.pf_color_entry.editingFinished.connect(
            self.on_pf_color_entry)
        self.ui.general_defaults_form.general_gui_group.pf_color_button.clicked.connect(
            self.on_pf_color_button)
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_spinner.valueChanged.connect(
            self.on_pf_color_spinner)
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_slider.valueChanged.connect(
            self.on_pf_color_slider)
        self.ui.general_defaults_form.general_gui_group.pl_color_entry.editingFinished.connect(
            self.on_pl_color_entry)
        self.ui.general_defaults_form.general_gui_group.pl_color_button.clicked.connect(
            self.on_pl_color_button)
        # Setting selection (left - right) colors signals
        self.ui.general_defaults_form.general_gui_group.sf_color_entry.editingFinished.connect(
            self.on_sf_color_entry)
        self.ui.general_defaults_form.general_gui_group.sf_color_button.clicked.connect(
            self.on_sf_color_button)
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_spinner.valueChanged.connect(
            self.on_sf_color_spinner)
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_slider.valueChanged.connect(
            self.on_sf_color_slider)
        self.ui.general_defaults_form.general_gui_group.sl_color_entry.editingFinished.connect(
            self.on_sl_color_entry)
        self.ui.general_defaults_form.general_gui_group.sl_color_button.clicked.connect(
            self.on_sl_color_button)
        # Setting selection (right - left) colors signals
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_entry.editingFinished.connect(
            self.on_alt_sf_color_entry)
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_button.clicked.connect(
            self.on_alt_sf_color_button)
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_spinner.valueChanged.connect(
            self.on_alt_sf_color_spinner)
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_slider.valueChanged.connect(
            self.on_alt_sf_color_slider)
        self.ui.general_defaults_form.general_gui_group.alt_sl_color_entry.editingFinished.connect(
            self.on_alt_sl_color_entry)
        self.ui.general_defaults_form.general_gui_group.alt_sl_color_button.clicked.connect(
            self.on_alt_sl_color_button)
        # Setting Editor Draw colors signals
        self.ui.general_defaults_form.general_gui_group.draw_color_entry.editingFinished.connect(
            self.on_draw_color_entry)
        self.ui.general_defaults_form.general_gui_group.draw_color_button.clicked.connect(
            self.on_draw_color_button)

        self.ui.general_defaults_form.general_gui_group.sel_draw_color_entry.editingFinished.connect(
            self.on_sel_draw_color_entry)
        self.ui.general_defaults_form.general_gui_group.sel_draw_color_button.clicked.connect(
            self.on_sel_draw_color_button)

        self.ui.general_defaults_form.general_gui_group.proj_color_entry.editingFinished.connect(
            self.on_proj_color_entry)
        self.ui.general_defaults_form.general_gui_group.proj_color_button.clicked.connect(
            self.on_proj_color_button)

        self.ui.general_defaults_form.general_gui_group.proj_color_dis_entry.editingFinished.connect(
            self.on_proj_color_dis_entry)
        self.ui.general_defaults_form.general_gui_group.proj_color_dis_button.clicked.connect(
            self.on_proj_color_dis_button)

        # ########## workspace setting signals ###########
        self.ui.general_defaults_form.general_gui_group.wk_cb.currentIndexChanged.connect(self.on_workspace_modified)
        self.ui.general_defaults_form.general_gui_group.workspace_cb.stateChanged.connect(self.on_workspace)

        self.ui.general_defaults_form.general_gui_set_group.layout_combo.activated.connect(self.on_layout)

        # ########## CNC Job related signals #############
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.tc_variable_combo.currentIndexChanged[str].connect(
            self.on_cnc_custom_parameters)
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_entry.editingFinished.connect(
            self.on_annotation_fontcolor_entry)
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_button.clicked.connect(
            self.on_annotation_fontcolor_button)

        # ########## Tools related signals #############
        self.ui.tools_defaults_form.tools_film_group.film_color_entry.editingFinished.connect(
            self.on_film_color_entry)
        self.ui.tools_defaults_form.tools_film_group.film_color_button.clicked.connect(
            self.on_film_color_button)

        # ########## Modify G-CODE Plot Area TAB ###########
        self.ui.code_editor.textChanged.connect(self.handleTextChanged)
        self.ui.buttonOpen.clicked.connect(self.handleOpen)
        self.ui.buttonSave.clicked.connect(self.handleSaveGCode)
        self.ui.buttonPrint.clicked.connect(self.handlePrint)
        self.ui.buttonPreview.clicked.connect(self.handlePreview)
        self.ui.buttonFind.clicked.connect(self.handleFindGCode)
        self.ui.buttonReplace.clicked.connect(self.handleReplaceGCode)

        # portability changed signal
        self.ui.general_defaults_form.general_app_group.portability_cb.stateChanged.connect(self.on_portable_checked)

        # Object list
        self.collection.view.activated.connect(self.on_row_activated)

        # Monitor the checkbox from the Application Defaults Tab and show the TCL shell or not depending on it's value
        self.ui.general_defaults_form.general_gui_set_group.shell_startup_cb.clicked.connect(self.on_toggle_shell)

        # Make sure that when the Excellon loading parameters are changed, the change is reflected in the
        # Export Excellon parameters.
        self.ui.excellon_defaults_form.excellon_gen_group.update_excellon_cb.stateChanged.connect(
            self.on_update_exc_export
        )
        # call it once to make sure it is updated at startup
        self.on_update_exc_export(state=self.defaults["excellon_update"])

        # Load the defaults values into the Excellon Format and Excellon Zeros fields
        self.ui.excellon_defaults_form.excellon_opt_group.excellon_defaults_button.clicked.connect(
            self.on_excellon_defaults_button)

        # Load the defaults values into the Excellon Format and Excellon Zeros fields
        self.ui.excellon_options_form.excellon_opt_group.excellon_defaults_button.clicked.connect(
            self.on_excellon_options_button)

        # when there are arguments at application startup this get launched
        self.args_at_startup[list].connect(self.on_startup_args)

        # ##############################################################
        # ############### FILE ASSOCIATIONS SIGNALS ####################
        # ##############################################################

        self.ui.fa_defaults_form.fa_excellon_group.restore_btn.clicked.connect(
            lambda: self.restore_extensions(ext_type='excellon'))
        self.ui.fa_defaults_form.fa_gcode_group.restore_btn.clicked.connect(
            lambda: self.restore_extensions(ext_type='gcode'))
        self.ui.fa_defaults_form.fa_gerber_group.restore_btn.clicked.connect(
            lambda: self.restore_extensions(ext_type='gerber'))

        self.ui.fa_defaults_form.fa_excellon_group.del_all_btn.clicked.connect(
            lambda: self.delete_all_extensions(ext_type='excellon'))
        self.ui.fa_defaults_form.fa_gcode_group.del_all_btn.clicked.connect(
            lambda: self.delete_all_extensions(ext_type='gcode'))
        self.ui.fa_defaults_form.fa_gerber_group.del_all_btn.clicked.connect(
            lambda: self.delete_all_extensions(ext_type='gerber'))

        self.ui.fa_defaults_form.fa_excellon_group.add_btn.clicked.connect(
            lambda: self.add_extension(ext_type='excellon'))
        self.ui.fa_defaults_form.fa_gcode_group.add_btn.clicked.connect(
            lambda: self.add_extension(ext_type='gcode'))
        self.ui.fa_defaults_form.fa_gerber_group.add_btn.clicked.connect(
            lambda: self.add_extension(ext_type='gerber'))

        self.ui.fa_defaults_form.fa_excellon_group.del_btn.clicked.connect(
            lambda: self.del_extension(ext_type='excellon'))
        self.ui.fa_defaults_form.fa_gcode_group.del_btn.clicked.connect(
            lambda: self.del_extension(ext_type='gcode'))
        self.ui.fa_defaults_form.fa_gerber_group.del_btn.clicked.connect(
            lambda: self.del_extension(ext_type='gerber'))

        # connect the 'Apply' buttons from the Preferences/File Associations
        self.ui.fa_defaults_form.fa_excellon_group.exc_list_btn.clicked.connect(
            lambda: self.on_register_files(obj_type='excellon'))
        self.ui.fa_defaults_form.fa_gcode_group.gco_list_btn.clicked.connect(
            lambda: self.on_register_files(obj_type='gcode'))
        self.ui.fa_defaults_form.fa_gerber_group.grb_list_btn.clicked.connect(
            lambda: self.on_register_files(obj_type='gerber'))

        # splash screen button signal
        self.ui.general_defaults_form.general_gui_set_group.splash_cb.stateChanged.connect(self.on_splash_changed)

        # connect the abort_all_tasks related slots to the related signals
        self.proc_container.idle_flag.connect(self.app_is_idle)

        # #####################################################################################
        # ########### FINISHED CONNECTING SIGNALS #############################################
        # #####################################################################################
        self.log.debug("Finished connecting Signals.")

        # #####################################################################################
        # ########################## Other setups #############################################
        # #####################################################################################

        # this is a flag to signal to other tools that the ui tooltab is locked and not accessible
        self.tool_tab_locked = False

        # decide if to show or hide the Notebook side of the screen at startup
        if self.defaults["global_project_at_startup"] is True:
            self.ui.splitter.setSizes([1, 1])
        else:
            self.ui.splitter.setSizes([0, 1])

        # Sets up FlatCAMObj, FCProcess and FCProcessContainer.
        self.setup_obj_classes()
        self.setup_recent_items()
        self.setup_component_editor()

        # #####################################################################################
        # ######################### Auto-complete KEYWORDS ####################################
        # #####################################################################################
        self.tcl_commands_list = ['add_circle', 'add_poly', 'add_polygon', 'add_polyline', 'add_rectangle',
                                  'aligndrill', 'aligndrillgrid', 'bbox', 'bounding_box', 'clear', 'cncjob', 'cutout',
                                  'delete', 'drillcncjob', 'export_gcode', 'export_svg', 'ext', 'exteriors', 'follow',
                                  'geo_union', 'geocutout', 'get_names', 'get_sys', 'getsys', 'help', 'import_svg',
                                  'interiors', 'isolate', 'join_excellon', 'join_excellons', 'join_geometries',
                                  'join_geometry', 'list_sys', 'listsys', 'milld', 'mills', 'milldrills', 'millslots',
                                  'mirror', 'ncc',
                                  'ncc_clear', 'ncr', 'new', 'new_geometry', 'non_copper_regions', 'offset',
                                  'open_excellon', 'open_gcode', 'open_gerber', 'open_project', 'options', 'paint',
                                  'pan', 'panel', 'panelize', 'plot_all', 'plot_objects', 'save', 'save_project',
                                  'save_sys', 'scale',
                                  'set_active', 'set_sys', 'setsys', 'skew', 'subtract_poly', 'subtract_rectangle',
                                  'version', 'write_gcode'
                                  ]

        self.ordinary_keywords = self.defaults["global_autocomplete_keywords"]

        self.tcl_keywords = [
            'after', 'append', 'apply', 'argc', 'argv', 'argv0', 'array', 'attemptckalloc', 'attemptckrealloc',
            'auto_execok', 'auto_import', 'auto_load', 'auto_mkindex', 'auto_path', 'auto_qualify', 'auto_reset',
            'bgerror', 'binary', 'break', 'case', 'catch', 'cd', 'chan', 'ckalloc', 'ckfree', 'ckrealloc', 'clock',
            'close', 'concat', 'continue', 'coroutine', 'dde', 'dict', 'encoding', 'env', 'eof', 'error', 'errorCode',
            'errorInfo', 'eval', 'exec', 'exit', 'expr', 'fblocked', 'fconfigure', 'fcopy', 'file', 'fileevent',
            'filename', 'flush', 'for', 'foreach', 'format', 'gets', 'glob', 'global', 'history', 'http', 'if', 'incr',
            'info', 'interp', 'join', 'lappend', 'lassign', 'lindex', 'linsert', 'list', 'llength', 'load', 'lrange',
            'lrepeat', 'lreplace', 'lreverse', 'lsearch', 'lset', 'lsort', 'mathfunc', 'mathop', 'memory', 'msgcat',
            'my', 'namespace', 'next', 'nextto', 'open', 'package', 'parray', 'pid', 'pkg_mkIndex', 'platform',
            'proc', 'puts', 'pwd', 're_syntax', 'read', 'refchan', 'regexp', 'registry', 'regsub', 'rename', 'return',
            'safe', 'scan', 'seek', 'self', 'set', 'socket', 'source', 'split', 'string', 'subst', 'switch',
            'tailcall', 'Tcl', 'Tcl_Access', 'Tcl_AddErrorInfo', 'Tcl_AddObjErrorInfo', 'Tcl_AlertNotifier',
            'Tcl_Alloc', 'Tcl_AllocHashEntryProc', 'Tcl_AllocStatBuf', 'Tcl_AllowExceptions', 'Tcl_AppendAllObjTypes',
            'Tcl_AppendElement', 'Tcl_AppendExportList', 'Tcl_AppendFormatToObj', 'Tcl_AppendLimitedToObj',
            'Tcl_AppendObjToErrorInfo', 'Tcl_AppendObjToObj', 'Tcl_AppendPrintfToObj', 'Tcl_AppendResult',
            'Tcl_AppendResultVA', 'Tcl_AppendStringsToObj', 'Tcl_AppendStringsToObjVA', 'Tcl_AppendToObj',
            'Tcl_AppendUnicodeToObj', 'Tcl_AppInit', 'Tcl_AppInitProc', 'Tcl_ArgvInfo', 'Tcl_AsyncCreate',
            'Tcl_AsyncDelete', 'Tcl_AsyncInvoke', 'Tcl_AsyncMark', 'Tcl_AsyncProc', 'Tcl_AsyncReady',
            'Tcl_AttemptAlloc', 'Tcl_AttemptRealloc', 'Tcl_AttemptSetObjLength', 'Tcl_BackgroundError',
            'Tcl_BackgroundException', 'Tcl_Backslash', 'Tcl_BadChannelOption', 'Tcl_CallWhenDeleted', 'Tcl_Canceled',
            'Tcl_CancelEval', 'Tcl_CancelIdleCall', 'Tcl_ChannelBlockModeProc', 'Tcl_ChannelBuffered',
            'Tcl_ChannelClose2Proc', 'Tcl_ChannelCloseProc', 'Tcl_ChannelFlushProc', 'Tcl_ChannelGetHandleProc',
            'Tcl_ChannelGetOptionProc', 'Tcl_ChannelHandlerProc', 'Tcl_ChannelInputProc', 'Tcl_ChannelName',
            'Tcl_ChannelOutputProc', 'Tcl_ChannelProc', 'Tcl_ChannelSeekProc', 'Tcl_ChannelSetOptionProc',
            'Tcl_ChannelThreadActionProc', 'Tcl_ChannelTruncateProc', 'Tcl_ChannelType', 'Tcl_ChannelVersion',
            'Tcl_ChannelWatchProc', 'Tcl_ChannelWideSeekProc', 'Tcl_Chdir', 'Tcl_ClassGetMetadata',
            'Tcl_ClassSetConstructor', 'Tcl_ClassSetDestructor', 'Tcl_ClassSetMetadata', 'Tcl_ClearChannelHandlers',
            'Tcl_CloneProc', 'Tcl_Close', 'Tcl_CloseProc', 'Tcl_CmdDeleteProc', 'Tcl_CmdInfo',
            'Tcl_CmdObjTraceDeleteProc', 'Tcl_CmdObjTraceProc', 'Tcl_CmdProc', 'Tcl_CmdTraceProc',
            'Tcl_CommandComplete', 'Tcl_CommandTraceInfo', 'Tcl_CommandTraceProc', 'Tcl_CompareHashKeysProc',
            'Tcl_Concat', 'Tcl_ConcatObj', 'Tcl_ConditionFinalize', 'Tcl_ConditionNotify', 'Tcl_ConditionWait',
            'Tcl_Config', 'Tcl_ConvertCountedElement', 'Tcl_ConvertElement', 'Tcl_ConvertToType',
            'Tcl_CopyObjectInstance', 'Tcl_CreateAlias', 'Tcl_CreateAliasObj', 'Tcl_CreateChannel',
            'Tcl_CreateChannelHandler', 'Tcl_CreateCloseHandler', 'Tcl_CreateCommand', 'Tcl_CreateEncoding',
            'Tcl_CreateEnsemble', 'Tcl_CreateEventSource', 'Tcl_CreateExitHandler', 'Tcl_CreateFileHandler',
            'Tcl_CreateHashEntry', 'Tcl_CreateInterp', 'Tcl_CreateMathFunc', 'Tcl_CreateNamespace',
            'Tcl_CreateObjCommand', 'Tcl_CreateObjTrace', 'Tcl_CreateSlave', 'Tcl_CreateThread',
            'Tcl_CreateThreadExitHandler', 'Tcl_CreateTimerHandler', 'Tcl_CreateTrace',
            'Tcl_CutChannel', 'Tcl_DecrRefCount', 'Tcl_DeleteAssocData', 'Tcl_DeleteChannelHandler',
            'Tcl_DeleteCloseHandler', 'Tcl_DeleteCommand', 'Tcl_DeleteCommandFromToken', 'Tcl_DeleteEvents',
            'Tcl_DeleteEventSource', 'Tcl_DeleteExitHandler', 'Tcl_DeleteFileHandler', 'Tcl_DeleteHashEntry',
            'Tcl_DeleteHashTable', 'Tcl_DeleteInterp', 'Tcl_DeleteNamespace', 'Tcl_DeleteThreadExitHandler',
            'Tcl_DeleteTimerHandler', 'Tcl_DeleteTrace', 'Tcl_DetachChannel', 'Tcl_DetachPids', 'Tcl_DictObjDone',
            'Tcl_DictObjFirst', 'Tcl_DictObjGet', 'Tcl_DictObjNext', 'Tcl_DictObjPut', 'Tcl_DictObjPutKeyList',
            'Tcl_DictObjRemove', 'Tcl_DictObjRemoveKeyList', 'Tcl_DictObjSize', 'Tcl_DiscardInterpState',
            'Tcl_DiscardResult', 'Tcl_DontCallWhenDeleted', 'Tcl_DoOneEvent', 'Tcl_DoWhenIdle',
            'Tcl_DriverBlockModeProc', 'Tcl_DriverClose2Proc', 'Tcl_DriverCloseProc', 'Tcl_DriverFlushProc',
            'Tcl_DriverGetHandleProc', 'Tcl_DriverGetOptionProc', 'Tcl_DriverHandlerProc', 'Tcl_DriverInputProc',
            'Tcl_DriverOutputProc', 'Tcl_DriverSeekProc', 'Tcl_DriverSetOptionProc', 'Tcl_DriverThreadActionProc',
            'Tcl_DriverTruncateProc', 'Tcl_DriverWatchProc', 'Tcl_DriverWideSeekProc', 'Tcl_DStringAppend',
            'Tcl_DStringAppendElement', 'Tcl_DStringEndSublist', 'Tcl_DStringFree', 'Tcl_DStringGetResult',
            'Tcl_DStringInit', 'Tcl_DStringLength', 'Tcl_DStringResult', 'Tcl_DStringSetLength',
            'Tcl_DStringStartSublist', 'Tcl_DStringTrunc', 'Tcl_DStringValue', 'Tcl_DumpActiveMemory',
            'Tcl_DupInternalRepProc', 'Tcl_DuplicateObj', 'Tcl_EncodingConvertProc', 'Tcl_EncodingFreeProc',
            'Tcl_EncodingType', 'tcl_endOfWord', 'Tcl_Eof', 'Tcl_ErrnoId', 'Tcl_ErrnoMsg', 'Tcl_Eval', 'Tcl_EvalEx',
            'Tcl_EvalFile', 'Tcl_EvalObjEx', 'Tcl_EvalObjv', 'Tcl_EvalTokens', 'Tcl_EvalTokensStandard', 'Tcl_Event',
            'Tcl_EventCheckProc', 'Tcl_EventDeleteProc', 'Tcl_EventProc', 'Tcl_EventSetupProc', 'Tcl_EventuallyFree',
            'Tcl_Exit', 'Tcl_ExitProc', 'Tcl_ExitThread', 'Tcl_Export', 'Tcl_ExposeCommand', 'Tcl_ExprBoolean',
            'Tcl_ExprBooleanObj', 'Tcl_ExprDouble', 'Tcl_ExprDoubleObj', 'Tcl_ExprLong', 'Tcl_ExprLongObj',
            'Tcl_ExprObj', 'Tcl_ExprString', 'Tcl_ExternalToUtf', 'Tcl_ExternalToUtfDString', 'Tcl_FileProc',
            'Tcl_Filesystem', 'Tcl_Finalize', 'Tcl_FinalizeNotifier', 'Tcl_FinalizeThread', 'Tcl_FindCommand',
            'Tcl_FindEnsemble', 'Tcl_FindExecutable', 'Tcl_FindHashEntry', 'tcl_findLibrary', 'Tcl_FindNamespace',
            'Tcl_FirstHashEntry', 'Tcl_Flush', 'Tcl_ForgetImport', 'Tcl_Format', 'Tcl_FreeHashEntryProc',
            'Tcl_FreeInternalRepProc', 'Tcl_FreeParse', 'Tcl_FreeProc', 'Tcl_FreeResult',
            'Tcl_Free·\xa0Tcl_FreeEncoding', 'Tcl_FSAccess', 'Tcl_FSAccessProc', 'Tcl_FSChdir',
            'Tcl_FSChdirProc', 'Tcl_FSConvertToPathType', 'Tcl_FSCopyDirectory', 'Tcl_FSCopyDirectoryProc',
            'Tcl_FSCopyFile', 'Tcl_FSCopyFileProc', 'Tcl_FSCreateDirectory', 'Tcl_FSCreateDirectoryProc',
            'Tcl_FSCreateInternalRepProc', 'Tcl_FSData', 'Tcl_FSDeleteFile', 'Tcl_FSDeleteFileProc',
            'Tcl_FSDupInternalRepProc', 'Tcl_FSEqualPaths', 'Tcl_FSEvalFile', 'Tcl_FSEvalFileEx',
            'Tcl_FSFileAttrsGet', 'Tcl_FSFileAttrsGetProc', 'Tcl_FSFileAttrsSet', 'Tcl_FSFileAttrsSetProc',
            'Tcl_FSFileAttrStrings', 'Tcl_FSFileSystemInfo', 'Tcl_FSFilesystemPathTypeProc',
            'Tcl_FSFilesystemSeparatorProc', 'Tcl_FSFreeInternalRepProc', 'Tcl_FSGetCwd', 'Tcl_FSGetCwdProc',
            'Tcl_FSGetFileSystemForPath', 'Tcl_FSGetInternalRep', 'Tcl_FSGetNativePath', 'Tcl_FSGetNormalizedPath',
            'Tcl_FSGetPathType', 'Tcl_FSGetTranslatedPath', 'Tcl_FSGetTranslatedStringPath',
            'Tcl_FSInternalToNormalizedProc', 'Tcl_FSJoinPath', 'Tcl_FSJoinToPath', 'Tcl_FSLinkProc',
            'Tcl_FSLink·\xa0Tcl_FSListVolumes', 'Tcl_FSListVolumesProc', 'Tcl_FSLoadFile', 'Tcl_FSLoadFileProc',
            'Tcl_FSLstat', 'Tcl_FSLstatProc', 'Tcl_FSMatchInDirectory', 'Tcl_FSMatchInDirectoryProc',
            'Tcl_FSMountsChanged', 'Tcl_FSNewNativePath', 'Tcl_FSNormalizePathProc', 'Tcl_FSOpenFileChannel',
            'Tcl_FSOpenFileChannelProc', 'Tcl_FSPathInFilesystemProc', 'Tcl_FSPathSeparator', 'Tcl_FSRegister',
            'Tcl_FSRemoveDirectory', 'Tcl_FSRemoveDirectoryProc', 'Tcl_FSRenameFile', 'Tcl_FSRenameFileProc',
            'Tcl_FSSplitPath', 'Tcl_FSStat', 'Tcl_FSStatProc', 'Tcl_FSUnloadFile', 'Tcl_FSUnloadFileProc',
            'Tcl_FSUnregister', 'Tcl_FSUtime', 'Tcl_FSUtimeProc', 'Tcl_GetAccessTimeFromStat', 'Tcl_GetAlias',
            'Tcl_GetAliasObj', 'Tcl_GetAssocData', 'Tcl_GetBignumFromObj', 'Tcl_GetBlocksFromStat',
            'Tcl_GetBlockSizeFromStat', 'Tcl_GetBoolean', 'Tcl_GetBooleanFromObj', 'Tcl_GetByteArrayFromObj',
            'Tcl_GetChangeTimeFromStat', 'Tcl_GetChannel', 'Tcl_GetChannelBufferSize', 'Tcl_GetChannelError',
            'Tcl_GetChannelErrorInterp', 'Tcl_GetChannelHandle', 'Tcl_GetChannelInstanceData', 'Tcl_GetChannelMode',
            'Tcl_GetChannelName', 'Tcl_GetChannelNames', 'Tcl_GetChannelNamesEx', 'Tcl_GetChannelOption',
            'Tcl_GetChannelThread', 'Tcl_GetChannelType', 'Tcl_GetCharLength', 'Tcl_GetClassAsObject',
            'Tcl_GetCommandFromObj', 'Tcl_GetCommandFullName', 'Tcl_GetCommandInfo', 'Tcl_GetCommandInfoFromToken',
            'Tcl_GetCommandName', 'Tcl_GetCurrentNamespace', 'Tcl_GetCurrentThread', 'Tcl_GetCwd',
            'Tcl_GetDefaultEncodingDir', 'Tcl_GetDeviceTypeFromStat', 'Tcl_GetDouble', 'Tcl_GetDoubleFromObj',
            'Tcl_GetEncoding', 'Tcl_GetEncodingFromObj', 'Tcl_GetEncodingName', 'Tcl_GetEncodingNameFromEnvironment',
            'Tcl_GetEncodingNames', 'Tcl_GetEncodingSearchPath', 'Tcl_GetEnsembleFlags', 'Tcl_GetEnsembleMappingDict',
            'Tcl_GetEnsembleNamespace', 'Tcl_GetEnsembleParameterList', 'Tcl_GetEnsembleSubcommandList',
            'Tcl_GetEnsembleUnknownHandler', 'Tcl_GetErrno', 'Tcl_GetErrorLine', 'Tcl_GetFSDeviceFromStat',
            'Tcl_GetFSInodeFromStat', 'Tcl_GetGlobalNamespace', 'Tcl_GetGroupIdFromStat', 'Tcl_GetHashKey',
            'Tcl_GetHashValue', 'Tcl_GetHostName', 'Tcl_GetIndexFromObj', 'Tcl_GetIndexFromObjStruct', 'Tcl_GetInt',
            'Tcl_GetInterpPath', 'Tcl_GetIntFromObj', 'Tcl_GetLinkCountFromStat', 'Tcl_GetLongFromObj',
            'Tcl_GetMaster', 'Tcl_GetMathFuncInfo', 'Tcl_GetModeFromStat', 'Tcl_GetModificationTimeFromStat',
            'Tcl_GetNameOfExecutable', 'Tcl_GetNamespaceUnknownHandler', 'Tcl_GetObjectAsClass', 'Tcl_GetObjectCommand',
            'Tcl_GetObjectFromObj', 'Tcl_GetObjectName', 'Tcl_GetObjectNamespace', 'Tcl_GetObjResult', 'Tcl_GetObjType',
            'Tcl_GetOpenFile', 'Tcl_GetPathType', 'Tcl_GetRange', 'Tcl_GetRegExpFromObj', 'Tcl_GetReturnOptions',
            'Tcl_Gets', 'Tcl_GetServiceMode', 'Tcl_GetSizeFromStat', 'Tcl_GetSlave', 'Tcl_GetsObj',
            'Tcl_GetStackedChannel', 'Tcl_GetStartupScript', 'Tcl_GetStdChannel', 'Tcl_GetString',
            'Tcl_GetStringFromObj', 'Tcl_GetStringResult', 'Tcl_GetThreadData', 'Tcl_GetTime', 'Tcl_GetTopChannel',
            'Tcl_GetUniChar', 'Tcl_GetUnicode', 'Tcl_GetUnicodeFromObj', 'Tcl_GetUserIdFromStat', 'Tcl_GetVar',
            'Tcl_GetVar2', 'Tcl_GetVar2Ex', 'Tcl_GetVersion', 'Tcl_GetWideIntFromObj', 'Tcl_GlobalEval',
            'Tcl_GlobalEvalObj', 'Tcl_GlobTypeData', 'Tcl_HashKeyType', 'Tcl_HashStats', 'Tcl_HideCommand',
            'Tcl_IdleProc', 'Tcl_Import', 'Tcl_IncrRefCount', 'Tcl_Init', 'Tcl_InitCustomHashTable',
            'Tcl_InitHashTable', 'Tcl_InitMemory', 'Tcl_InitNotifier', 'Tcl_InitObjHashTable', 'Tcl_InitStubs',
            'Tcl_InputBlocked', 'Tcl_InputBuffered', 'tcl_interactive', 'Tcl_Interp', 'Tcl_InterpActive',
            'Tcl_InterpDeleted', 'Tcl_InterpDeleteProc', 'Tcl_InvalidateStringRep', 'Tcl_IsChannelExisting',
            'Tcl_IsChannelRegistered', 'Tcl_IsChannelShared', 'Tcl_IsEnsemble', 'Tcl_IsSafe', 'Tcl_IsShared',
            'Tcl_IsStandardChannel', 'Tcl_JoinPath', 'Tcl_JoinThread', 'tcl_library', 'Tcl_LimitAddHandler',
            'Tcl_LimitCheck', 'Tcl_LimitExceeded', 'Tcl_LimitGetCommands', 'Tcl_LimitGetGranularity',
            'Tcl_LimitGetTime', 'Tcl_LimitHandlerDeleteProc', 'Tcl_LimitHandlerProc', 'Tcl_LimitReady',
            'Tcl_LimitRemoveHandler', 'Tcl_LimitSetCommands', 'Tcl_LimitSetGranularity', 'Tcl_LimitSetTime',
            'Tcl_LimitTypeEnabled', 'Tcl_LimitTypeExceeded', 'Tcl_LimitTypeReset', 'Tcl_LimitTypeSet',
            'Tcl_LinkVar', 'Tcl_ListMathFuncs', 'Tcl_ListObjAppendElement', 'Tcl_ListObjAppendList',
            'Tcl_ListObjGetElements', 'Tcl_ListObjIndex', 'Tcl_ListObjLength', 'Tcl_ListObjReplace',
            'Tcl_LogCommandInfo', 'Tcl_Main', 'Tcl_MainLoopProc', 'Tcl_MakeFileChannel', 'Tcl_MakeSafe',
            'Tcl_MakeTcpClientChannel', 'Tcl_MathProc', 'TCL_MEM_DEBUG', 'Tcl_Merge', 'Tcl_MethodCallProc',
            'Tcl_MethodDeclarerClass', 'Tcl_MethodDeclarerObject', 'Tcl_MethodDeleteProc', 'Tcl_MethodIsPublic',
            'Tcl_MethodIsType', 'Tcl_MethodName', 'Tcl_MethodType', 'Tcl_MutexFinalize', 'Tcl_MutexLock',
            'Tcl_MutexUnlock', 'Tcl_NamespaceDeleteProc', 'Tcl_NewBignumObj', 'Tcl_NewBooleanObj',
            'Tcl_NewByteArrayObj', 'Tcl_NewDictObj', 'Tcl_NewDoubleObj', 'Tcl_NewInstanceMethod', 'Tcl_NewIntObj',
            'Tcl_NewListObj', 'Tcl_NewLongObj', 'Tcl_NewMethod', 'Tcl_NewObj', 'Tcl_NewObjectInstance',
            'Tcl_NewStringObj', 'Tcl_NewUnicodeObj', 'Tcl_NewWideIntObj', 'Tcl_NextHashEntry', 'tcl_nonwordchars',
            'Tcl_NotifierProcs', 'Tcl_NotifyChannel', 'Tcl_NRAddCallback', 'Tcl_NRCallObjProc', 'Tcl_NRCmdSwap',
            'Tcl_NRCreateCommand', 'Tcl_NREvalObj', 'Tcl_NREvalObjv', 'Tcl_NumUtfChars', 'Tcl_Obj', 'Tcl_ObjCmdProc',
            'Tcl_ObjectContextInvokeNext', 'Tcl_ObjectContextIsFiltering', 'Tcl_ObjectContextMethod',
            'Tcl_ObjectContextObject', 'Tcl_ObjectContextSkippedArgs', 'Tcl_ObjectDeleted', 'Tcl_ObjectGetMetadata',
            'Tcl_ObjectGetMethodNameMapper', 'Tcl_ObjectMapMethodNameProc', 'Tcl_ObjectMetadataDeleteProc',
            'Tcl_ObjectSetMetadata', 'Tcl_ObjectSetMethodNameMapper', 'Tcl_ObjGetVar2', 'Tcl_ObjPrintf',
            'Tcl_ObjSetVar2', 'Tcl_ObjType', 'Tcl_OpenCommandChannel', 'Tcl_OpenFileChannel', 'Tcl_OpenTcpClient',
            'Tcl_OpenTcpServer', 'Tcl_OutputBuffered', 'Tcl_PackageInitProc', 'Tcl_PackageUnloadProc', 'Tcl_Panic',
            'Tcl_PanicProc', 'Tcl_PanicVA', 'Tcl_ParseArgsObjv', 'Tcl_ParseBraces', 'Tcl_ParseCommand', 'Tcl_ParseExpr',
            'Tcl_ParseQuotedString', 'Tcl_ParseVar', 'Tcl_ParseVarName', 'tcl_patchLevel', 'tcl_pkgPath',
            'Tcl_PkgPresent', 'Tcl_PkgPresentEx', 'Tcl_PkgProvide', 'Tcl_PkgProvideEx', 'Tcl_PkgRequire',
            'Tcl_PkgRequireEx', 'Tcl_PkgRequireProc', 'tcl_platform', 'Tcl_PosixError', 'tcl_precision',
            'Tcl_Preserve', 'Tcl_PrintDouble', 'Tcl_PutEnv', 'Tcl_QueryTimeProc', 'Tcl_QueueEvent', 'tcl_rcFileName',
            'Tcl_Read', 'Tcl_ReadChars', 'Tcl_ReadRaw', 'Tcl_Realloc', 'Tcl_ReapDetachedProcs', 'Tcl_RecordAndEval',
            'Tcl_RecordAndEvalObj', 'Tcl_RegExpCompile', 'Tcl_RegExpExec', 'Tcl_RegExpExecObj', 'Tcl_RegExpGetInfo',
            'Tcl_RegExpIndices', 'Tcl_RegExpInfo', 'Tcl_RegExpMatch', 'Tcl_RegExpMatchObj', 'Tcl_RegExpRange',
            'Tcl_RegisterChannel', 'Tcl_RegisterConfig', 'Tcl_RegisterObjType', 'Tcl_Release', 'Tcl_ResetResult',
            'Tcl_RestoreInterpState', 'Tcl_RestoreResult', 'Tcl_SaveInterpState', 'Tcl_SaveResult', 'Tcl_ScaleTimeProc',
            'Tcl_ScanCountedElement', 'Tcl_ScanElement', 'Tcl_Seek', 'Tcl_ServiceAll', 'Tcl_ServiceEvent',
            'Tcl_ServiceModeHook', 'Tcl_SetAssocData', 'Tcl_SetBignumObj', 'Tcl_SetBooleanObj',
            'Tcl_SetByteArrayLength', 'Tcl_SetByteArrayObj', 'Tcl_SetChannelBufferSize', 'Tcl_SetChannelError',
            'Tcl_SetChannelErrorInterp', 'Tcl_SetChannelOption', 'Tcl_SetCommandInfo', 'Tcl_SetCommandInfoFromToken',
            'Tcl_SetDefaultEncodingDir', 'Tcl_SetDoubleObj', 'Tcl_SetEncodingSearchPath', 'Tcl_SetEnsembleFlags',
            'Tcl_SetEnsembleMappingDict', 'Tcl_SetEnsembleParameterList', 'Tcl_SetEnsembleSubcommandList',
            'Tcl_SetEnsembleUnknownHandler', 'Tcl_SetErrno', 'Tcl_SetErrorCode', 'Tcl_SetErrorCodeVA',
            'Tcl_SetErrorLine', 'Tcl_SetExitProc', 'Tcl_SetFromAnyProc', 'Tcl_SetHashValue', 'Tcl_SetIntObj',
            'Tcl_SetListObj', 'Tcl_SetLongObj', 'Tcl_SetMainLoop', 'Tcl_SetMaxBlockTime',
            'Tcl_SetNamespaceUnknownHandler', 'Tcl_SetNotifier', 'Tcl_SetObjErrorCode', 'Tcl_SetObjLength',
            'Tcl_SetObjResult', 'Tcl_SetPanicProc', 'Tcl_SetRecursionLimit', 'Tcl_SetResult', 'Tcl_SetReturnOptions',
            'Tcl_SetServiceMode', 'Tcl_SetStartupScript', 'Tcl_SetStdChannel', 'Tcl_SetStringObj',
            'Tcl_SetSystemEncoding', 'Tcl_SetTimeProc', 'Tcl_SetTimer', 'Tcl_SetUnicodeObj', 'Tcl_SetVar',
            'Tcl_SetVar2', 'Tcl_SetVar2Ex', 'Tcl_SetWideIntObj', 'Tcl_SignalId', 'Tcl_SignalMsg', 'Tcl_Sleep',
            'Tcl_SourceRCFile', 'Tcl_SpliceChannel', 'Tcl_SplitList', 'Tcl_SplitPath', 'Tcl_StackChannel',
            'Tcl_StandardChannels', 'tcl_startOfNextWord', 'tcl_startOfPreviousWord', 'Tcl_Stat', 'Tcl_StaticPackage',
            'Tcl_StringCaseMatch', 'Tcl_StringMatch', 'Tcl_SubstObj', 'Tcl_TakeBignumFromObj', 'Tcl_TcpAcceptProc',
            'Tcl_Tell', 'Tcl_ThreadAlert', 'Tcl_ThreadQueueEvent', 'Tcl_Time', 'Tcl_TimerProc', 'Tcl_Token',
            'Tcl_TraceCommand', 'tcl_traceCompile', 'tcl_traceEval', 'Tcl_TraceVar', 'Tcl_TraceVar2',
            'Tcl_TransferResult', 'Tcl_TranslateFileName', 'Tcl_TruncateChannel', 'Tcl_Ungets', 'Tcl_UniChar',
            'Tcl_UniCharAtIndex', 'Tcl_UniCharCaseMatch', 'Tcl_UniCharIsAlnum', 'Tcl_UniCharIsAlpha',
            'Tcl_UniCharIsControl', 'Tcl_UniCharIsDigit', 'Tcl_UniCharIsGraph', 'Tcl_UniCharIsLower',
            'Tcl_UniCharIsPrint', 'Tcl_UniCharIsPunct', 'Tcl_UniCharIsSpace', 'Tcl_UniCharIsUpper',
            'Tcl_UniCharIsWordChar', 'Tcl_UniCharLen', 'Tcl_UniCharNcasecmp', 'Tcl_UniCharNcmp', 'Tcl_UniCharToLower',
            'Tcl_UniCharToTitle', 'Tcl_UniCharToUpper', 'Tcl_UniCharToUtf', 'Tcl_UniCharToUtfDString', 'Tcl_UnlinkVar',
            'Tcl_UnregisterChannel', 'Tcl_UnsetVar', 'Tcl_UnsetVar2', 'Tcl_UnstackChannel', 'Tcl_UntraceCommand',
            'Tcl_UntraceVar', 'Tcl_UntraceVar2', 'Tcl_UpdateLinkedVar', 'Tcl_UpdateStringProc', 'Tcl_UpVar',
            'Tcl_UpVar2', 'Tcl_UtfAtIndex', 'Tcl_UtfBackslash', 'Tcl_UtfCharComplete', 'Tcl_UtfFindFirst',
            'Tcl_UtfFindLast', 'Tcl_UtfNext', 'Tcl_UtfPrev', 'Tcl_UtfToExternal', 'Tcl_UtfToExternalDString',
            'Tcl_UtfToLower', 'Tcl_UtfToTitle', 'Tcl_UtfToUniChar', 'Tcl_UtfToUniCharDString', 'Tcl_UtfToUpper',
            'Tcl_ValidateAllMemory', 'Tcl_Value', 'Tcl_VarEval', 'Tcl_VarEvalVA', 'Tcl_VarTraceInfo',
            'Tcl_VarTraceInfo2', 'Tcl_VarTraceProc', 'tcl_version', 'Tcl_WaitForEvent', 'Tcl_WaitPid',
            'Tcl_WinTCharToUtf', 'Tcl_WinUtfToTChar', 'tcl_wordBreakAfter', 'tcl_wordBreakBefore', 'tcl_wordchars',
            'Tcl_Write', 'Tcl_WriteChars', 'Tcl_WriteObj', 'Tcl_WriteRaw', 'Tcl_WrongNumArgs', 'Tcl_ZlibAdler32',
            'Tcl_ZlibCRC32', 'Tcl_ZlibDeflate', 'Tcl_ZlibInflate', 'Tcl_ZlibStreamChecksum', 'Tcl_ZlibStreamClose',
            'Tcl_ZlibStreamEof', 'Tcl_ZlibStreamGet', 'Tcl_ZlibStreamGetCommandName', 'Tcl_ZlibStreamInit',
            'Tcl_ZlibStreamPut', 'tcltest', 'tell', 'throw', 'time', 'tm', 'trace', 'transchan', 'try', 'unknown',
            'unload', 'unset', 'update', 'uplevel', 'upvar', 'variable', 'vwait', 'while', 'yield', 'yieldto', 'zlib'
        ]

        self.myKeywords = self.tcl_commands_list + self.ordinary_keywords + self.tcl_keywords

        self.default_autocomplete_keywords = [
            'all', 'angle_x', 'angle_y', 'axis', 'axisoffset', 'box', 'center_x', 'center_y',
            'columns', 'combine', 'connect', 'contour', 'depthperpass', 'dia', 'diatol', 'dist',
            'drilled_dias', 'drillz', 'pp',
            'gridoffsety', 'gridx', 'gridy', 'has_offset', 'holes', 'margin', 'method',
            'milled_dias',
            'minoffset', 'multidepth', 'name', 'offset', 'opt_type', 'order', 'outname',
            'overlap', 'passes', 'postamble', 'ppname_e', 'ppname_g', 'preamble', 'radius', 'ref',
            'rest', 'rows', 'scale_factor', 'spacing_columns', 'spacing_rows', 'spindlespeed',
            'use_threads', 'value', 'x', 'x0', 'x1', 'y', 'y0', 'y1', 'z_cut', 'z_move',
            'default', 'feedrate_z', 'grbl_11', 'grbl_laser', 'hpgl', 'line_xyz', 'marlin',
            'Paste_1', 'Repetier', 'Toolchange_Custom', 'Roland_MDX_20', 'Toolchange_manual',
            'Toolchange_Probe_MACH3', 'dwell', 'dwelltime', 'toolchange_xy', 'iso_type',
            'Desktop', 'FlatPrj', 'FlatConfig', 'Users', 'Documents', 'My Documents', 'Marius'
        ]

        # ####################################################################################
        # ####################### Shell SETUP ################################################
        # ####################################################################################

        self.shell = FCShell(self, version=self.version)
        self.shell._edit.set_model_data(self.myKeywords)
        self.ui.code_editor.set_model_data(self.myKeywords)
        self.shell.setWindowIcon(self.ui.app_icon)
        self.shell.setWindowTitle("FlatCAM Shell")
        self.shell.resize(*self.defaults["global_shell_shape"])
        self.shell.append_output("FlatCAM %s - " % self.version)
        self.shell.append_output(_("Open Source Software - Type help to get started\n\n"))

        self.init_tcl()

        self.ui.shell_dock = QtWidgets.QDockWidget("FlatCAM TCL Shell")
        self.ui.shell_dock.setObjectName('Shell_DockWidget')
        self.ui.shell_dock.setWidget(self.shell)
        self.ui.shell_dock.setAllowedAreas(QtCore.Qt.AllDockWidgetAreas)
        self.ui.shell_dock.setFeatures(QtWidgets.QDockWidget.DockWidgetMovable |
                                       QtWidgets.QDockWidget.DockWidgetFloatable |
                                       QtWidgets.QDockWidget.DockWidgetClosable)
        self.ui.addDockWidget(QtCore.Qt.BottomDockWidgetArea, self.ui.shell_dock)

        # show TCL shell at start-up based on the Menu -? Edit -> Preferences setting.
        if self.defaults["global_shell_at_startup"]:
            self.ui.shell_dock.show()
        else:
            self.ui.shell_dock.hide()

        # ##################################################################################
        # ###################### Tools and Plugins #########################################
        # ##################################################################################

        self.dblsidedtool = None
        self.measurement_tool = None
        self.panelize_tool = None
        self.film_tool = None
        self.paste_tool = None
        self.calculator_tool = None
        self.sub_tool = None
        self.move_tool = None
        self.cutout_tool = None
        self.ncclear_tool = None
        self.paint_tool = None
        self.transform_tool = None
        self.properties_tool = None
        self.pdf_tool = None
        self.image_tool = None
        self.pcb_wizard_tool = None

        # always install tools only after the shell is initialized because the self.inform.emit() depends on shell
        self.install_tools()

        # ### System Font Parsing ###
        # self.f_parse = ParseFont(self)
        # self.parse_system_fonts()

        # #####################################################################################
        # ######################## Check for updates ##########################################
        # #####################################################################################

        # Separate thread (Not worker)
        # Check for updates on startup but only if the user consent and the app is not in Beta version
        if (self.beta is False or self.beta is None) and \
                self.ui.general_defaults_form.general_gui_group.version_check_cb.get_value() is True:
            App.log.info("Checking for updates in backgroud (this is version %s)." % str(self.version))

            self.thr2 = QtCore.QThread()
            self.worker_task.emit({'fcn': self.version_check,
                                   'params': []})
            self.thr2.start(QtCore.QThread.LowPriority)

        # #####################################################################################
        # ###################### Variables for global usage ###################################
        # #####################################################################################

        # register files with FlatCAM; it works only for Windows for now
        if sys.platform == 'win32' and self.defaults["first_run"] is True:
            self.on_register_files()

        # coordinates for relative position display
        self.rel_point1 = (0, 0)
        self.rel_point2 = (0, 0)

        # variable to store coordinates
        self.pos = (0, 0)
        self.pos_jump = (0, 0)

        # variable to store mouse coordinates
        self.mouse = [0, 0]

        # decide if we have a double click or single click
        self.doubleclick = False

        # variable to store if a command is active (then the var is not None) and which one it is
        self.command_active = None
        # variable to store the status of moving selection action
        # None value means that it's not an selection action
        # True value = a selection from left to right
        # False value = a selection from right to left
        self.selection_type = None

        # List to store the objects that are currently loaded in FlatCAM
        # This list is updated on each object creation or object delete
        self.all_objects_list = list()

        # List to store the objects that are selected
        self.sel_objects_list = list()

        # holds the key modifier if pressed (CTRL, SHIFT or ALT)
        self.key_modifiers = None

        # Variable to hold the status of the axis
        self.toggle_axis = True

        # Variable to store the status of the fullscreen event
        self.toggle_fscreen = False

        # Variable to store the status of the code editor
        self.toggle_codeeditor = False

        # Variable to be used for situations when we don't want the LMB click on canvas to auto open the Project Tab
        self.click_noproject = False

        self.cursor = None

        # Variable to store the GCODE that was edited
        self.gcode_edited = ""

        # reference for the self.ui.code_editor
        self.reference_code_editor = None
        self.script_code = ''

        # if Preferences are changed in the Edit -> Preferences tab the value will be set to True
        self.preferences_changed_flag = False

        self.grb_list = ['art', 'bot', 'bsm', 'cmp', 'crc', 'crs', 'dim', 'g4', 'gb0', 'gb1', 'gb2', 'gb3', 'gb5',
                         'gb6', 'gb7', 'gb8', 'gb9', 'gbd', 'gbl', 'gbo', 'gbp', 'gbr', 'gbs', 'gdo', 'ger', 'gko',
                         'gml', 'gm1', 'gm2', 'gm3', 'grb', 'gtl', 'gto', 'gtp', 'gts', 'ly15', 'ly2', 'mil', 'pho',
                         'plc', 'pls', 'smb', 'smt', 'sol', 'spb', 'spt', 'ssb', 'sst', 'stc', 'sts', 'top', 'tsm']

        self.exc_list = ['drd', 'drl', 'exc', 'ncd', 'tap', 'txt', 'xln']

        self.gcode_list = ['cnc', 'din', 'dnc', 'ecs', 'eia', 'fan', 'fgc', 'fnc', 'gc', 'gcd', 'gcode', 'h', 'hnc',
                           'i', 'min', 'mpf', 'mpr', 'nc', 'ncc', 'ncg', 'ncp', 'out', 'plt', 'ply', 'rol', 'sbp',
                           'tap', 'xpi']
        self.svg_list = ['svg']
        self.dxf_list = ['dxf']
        self.pdf_list = ['pdf']
        self.prj_list = ['flatprj']
        self.conf_list = ['flatconfig']

        # global variable used by NCC Tool to signal that some polygons could not be cleared, if True
        # flag for polygons not cleared
        self.poly_not_cleared = False

        # VisPy visuals
        self.isHovering = False
        self.notHovering = True

        # when True, the app has to return from any thread
        self.abort_flag = False

        # ###############################################################################
        # ############# Save defaults to factory_defaults.FlatConfig file ###############
        # ############# It's done only once after install                 ###############
        # ###############################################################################
        factory_file = open(self.data_path + '/factory_defaults.FlatConfig')
        fac_def_from_file = factory_file.read()
        factory_defaults = json.loads(fac_def_from_file)

        # if the file contain an empty dictionary then save the factory defaults into the file
        if not factory_defaults:
            self.save_factory_defaults(silent=False)

            # ONLY AT FIRST STARTUP INIT THE GUI LAYOUT TO 'COMPACT'
            initial_lay = 'compact'
            self.on_layout(lay=initial_lay)

            # Set the combobox in Preferences to the current layout
            idx = self.ui.general_defaults_form.general_gui_set_group.layout_combo.findText(initial_lay)
            self.ui.general_defaults_form.general_gui_set_group.layout_combo.setCurrentIndex(idx)

        factory_file.close()

        # and then make the  factory_defaults.FlatConfig file read_only os it can't be modified after creation.
        filename_factory = self.data_path + '/factory_defaults.FlatConfig'
        os.chmod(filename_factory, S_IREAD | S_IRGRP | S_IROTH)

        # after the first run, this object should be False
        self.defaults["first_run"] = False

        # ###############################################################################
        # ################# ADDING FlatCAM EDITORS section ##############################
        # ###############################################################################

        # watch out for the position of the editors instantiation ... if it is done before a save of the default values
        # at the first launch of the App , the editors will not be functional.
        self.geo_editor = FlatCAMGeoEditor(self, disabled=True)
        self.exc_editor = FlatCAMExcEditor(self)
        self.grb_editor = FlatCAMGrbEditor(self)
        self.log.debug("Finished adding FlatCAM Editor's.")

        self.set_ui_title(name=_("New Project - Not saved"))

        # disable the Excellon path optimizations made with Google OR-Tools if the app is run on a 32bit platform
        current_platform = platform.architecture()[0]
        if current_platform != '64bit':
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_optimization_radio.set_value('T')
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_optimization_radio.setDisabled(True)

        # ###############################################################################
        # ####################### Finished the CONSTRUCTOR ##############################
        # ###############################################################################
        App.log.debug("END of constructor. Releasing control.")

        # #####################################################################################
        # ########################## SHOW GUI #################################################
        # #####################################################################################

        # finish the splash
        self.splash.finish(self.ui)

        settings = QSettings("Open Source", "FlatCAM")
        if settings.contains("maximized_gui"):
            maximized_ui = settings.value('maximized_gui', type=bool)
            if maximized_ui is True:
                self.ui.showMaximized()
            else:
                self.ui.show()
        else:
            self.ui.show()

        # #####################################################################################
        # ########################## START-UP ARGUMENTS #######################################
        # #####################################################################################

        # test if the program was started with a script as parameter
        if self.cmd_line_shellvar:
            try:
                cnt = 0
                command_tcl = 0
                for i in self.cmd_line_shellvar.split(','):
                    if i is not None:
                        try:
                            command_tcl = eval(i)
                        except:
                            command_tcl = i

                    command_tcl_formatted = 'set shellvar_{nr} {cmd}'.format(cmd=str(command_tcl), nr=str(cnt))
                    cnt += 1

                    # if there are Windows paths then replace the path separator with a Unix like one
                    if sys.platform == 'win32':
                        command_tcl_formatted = command_tcl_formatted.replace('\\', '/')
                    self.shell._sysShell.exec_command(command_tcl_formatted, no_echo=True)
            except Exception as ext:
                print("ERROR: ", ext)
                sys.exit(2)

        if self.cmd_line_shellfile:
            try:
                if self.ui.shell_dock.isHidden():
                    self.ui.shell_dock.show()

                with open(self.cmd_line_shellfile, "r") as myfile:
                    if show_splash:
                        self.splash.showMessage('%s: %ssec\n%s' % (
                            _("Canvas initialization started.\n"
                              "Canvas initialization finished in"), '%.2f' % self.used_time,
                            _("Executing Tcl Script ...")),
                                                alignment=Qt.AlignBottom | Qt.AlignLeft,
                                                color=QtGui.QColor("gray"))
                    cmd_line_shellfile_text = myfile.read()
                    self.shell._sysShell.exec_command(cmd_line_shellfile_text)
            except Exception as ext:
                print("ERROR: ", ext)
                sys.exit(2)

            # accept some type file as command line parameter: FlatCAM project, FlatCAM preferences or scripts
            # the path/file_name must be enclosed in quotes if it contain spaces
        if App.args:
            self.args_at_startup.emit(App.args)

    @staticmethod
    def copy_and_overwrite(from_path, to_path):
        """
        From here:
        https://stackoverflow.com/questions/12683834/how-to-copy-directory-recursively-in-python-and-overwrite-all

        :param from_path: source path
        :param to_path: destination path
        :return: None
        """
        if os.path.exists(to_path):
            shutil.rmtree(to_path)
        try:
            shutil.copytree(from_path, to_path)
        except FileNotFoundError:
            from_new_path = os.path.dirname(os.path.realpath(__file__)) + '\\flatcamGUI\\VisPyData\\data'
            shutil.copytree(from_new_path, to_path)

    def on_startup_args(self, args):
        """
        This will process any arguments provided to the application at startup. Like trying to launch a file or project.

        :param args: a list containing the application args at startup
        :return: None
        """

        if args is not None:
            args_to_process = args
        else:
            args_to_process = App.args

        log.debug("Application was started with arguments: %s. Processing ..." % str(args_to_process))

        for argument in args_to_process:
            if '.FlatPrj' in argument:
                try:
                    project_name = str(argument)

                    if project_name == "":
                        self.inform.emit(_("Open cancelled."))
                    else:
                        # self.open_project(project_name)
                        run_from_arg = True
                        # self.worker_task.emit({'fcn': self.open_project,
                        #                        'params': [project_name, run_from_arg]})
                        self.open_project(filename=project_name, run_from_arg=run_from_arg)
                except Exception as e:
                    log.debug("Could not open FlatCAM project file as App parameter due: %s" % str(e))

            elif '.FlatConfig' in argument:
                try:
                    file_name = str(argument)

                    if file_name == "":
                        self.inform.emit(_("Open Config file failed."))
                    else:
                        run_from_arg = True
                        # self.worker_task.emit({'fcn': self.open_config_file,
                        #                        'params': [file_name, run_from_arg]})
                        self.open_config_file(file_name, run_from_arg=run_from_arg)
                except Exception as e:
                    log.debug("Could not open FlatCAM Config file as App parameter due: %s" % str(e))

            elif '.FlatScript' in argument:
                try:
                    file_name = str(argument)

                    if file_name == "":
                        self.inform.emit(_("Open Script file failed."))
                    else:
                        # run_from_arg = True
                        # self.worker_task.emit({'fcn': self.open_script_file,
                        #                        'params': [file_name, run_from_arg]})
                        self.on_filerunscript(name=file_name)
                except Exception as e:
                    log.debug("Could not open FlatCAM Script file as App parameter due: %s" % str(e))

            elif 'quit' in argument or 'exit' in argument:
                log.debug("App.on_startup_args() --> Quit event.")
                sys.exit()

            elif 'save' in argument:
                log.debug("App.on_startup_args() --> Save event. App Defaults saved.")
                self.save_defaults()
            else:
                exc_list = self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.get_value().split(',')
                proc_arg = argument.lower()
                for ext in exc_list:
                    proc_ext = ext.replace(' ', '')
                    proc_ext = '.%s' % proc_ext
                    if proc_ext.lower() in proc_arg and proc_ext != '':
                        file_name = str(argument)
                        if file_name == "":
                            self.inform.emit(_("Open Excellon file failed."))
                        else:
                            self.on_fileopenexcellon(name=file_name)
                            return

                gco_list = self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.get_value().split(',')
                for ext in gco_list:
                    proc_ext = ext.replace(' ', '')
                    proc_ext = '.%s' % proc_ext
                    if proc_ext.lower() in proc_arg and proc_ext != '':
                        print(proc_ext, proc_arg)
                        file_name = str(argument)
                        if file_name == "":
                            self.inform.emit(_("Open GCode file failed."))
                        else:
                            self.on_fileopengcode(name=file_name)
                            return

                grb_list = self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.get_value().split(',')
                for ext in grb_list:
                    proc_ext = ext.replace(' ', '')
                    proc_ext = '.%s' % proc_ext
                    if proc_ext.lower() in proc_arg and proc_ext != '':
                        file_name = str(argument)
                        if file_name == "":
                            self.inform.emit(_("Open Gerber file failed."))
                        else:
                            self.on_fileopengerber(name=file_name)
                            return

    def set_ui_title(self, name):
        """
        Sets the title of the main window.

        :param name: String that store the project path and project name
        :return: None
        """
        self.ui.setWindowTitle('FlatCAM %s %s - %s    %s' %
                               (self.version,
                                ('BETA' if self.beta else ''),
                                platform.architecture()[0],
                                name)
                               )

    def defaults_read_form(self):
        """
        Will read all the values in the Preferences GUI and update the defaults dictionary.

        :return: None
        """
        for option in self.defaults_form_fields:
            try:
                self.defaults[option] = self.defaults_form_fields[option].get_value()
            except Exception as e:
                log.debug("App.defaults_read_form() --> %s" % str(e))

    def defaults_write_form(self, factor=None, fl_units=None):
        """
        Will set the values for all the GUI elements in Preferences GUI based on the values found in the
        self.defaults dictionary.

        :param factor: will apply a factor to the values that written in the GUI elements
        :param fl_units: current measuring units in FlatCAM: Metric or Inch
        :return: None
        """
        for option in self.defaults:
            self.defaults_write_form_field(option, factor=factor, units=fl_units)
            # try:
            #     self.defaults_form_fields[option].set_value(self.defaults[option])
            # except KeyError:
            #     #self.log.debug("defaults_write_form(): No field for: %s" % option)
            #     # TODO: Rethink this?
            #     pass

    def defaults_write_form_field(self, field, factor=None, units=None):
        """
        Basically it is the worker in the self.defaults_write_form()

        :param field: the GUI element in Preferences GUI to be updated
        :param factor: factor to be applied to the field parameter
        :param units: current FLatCAM measuring units
        :return: None, it updates GUI elements
        """
        try:
            if factor is None:
                if units is None:
                    self.defaults_form_fields[field].set_value(self.defaults[field])
                elif units == 'IN' and (field == 'global_gridx' or field == 'global_gridy'):
                    self.defaults_form_fields[field].set_value(self.defaults[field], decimals=6)
                elif units == 'MM' and (field == 'global_gridx' or field == 'global_gridy'):
                    self.defaults_form_fields[field].set_value(self.defaults[field], decimals=4)
            else:
                if units is None:
                    self.defaults_form_fields[field].set_value(self.defaults[field] * factor)
                elif units == 'IN' and (field == 'global_gridx' or field == 'global_gridy'):
                    self.defaults_form_fields[field].set_value((self.defaults[field] * factor), decimals=6)
                elif units == 'MM' and (field == 'global_gridx' or field == 'global_gridy'):
                    self.defaults_form_fields[field].set_value((self.defaults[field] * factor), decimals=4)
        except KeyError:
            # self.log.debug("defaults_write_form(): No field for: %s" % option)
            # TODO: Rethink this?
            pass
        except AttributeError:
            log.debug(field)

    def clear_pool(self):
        """
        Clear the multiprocessing pool and calls garbage collector.

        :return: None
        """
        self.pool.close()

        self.pool = Pool()
        self.pool_recreated.emit(self.pool)

        gc.collect()

    def install_tools(self):
        """
        This installs the FlatCAM tools (plugin-like) which reside in their own classes.
        Instantiation of the Tools classes.
        The order that the tools are installed is important as they can depend on each other install position.

        :return: None
        """
        self.dblsidedtool = DblSidedTool(self)
        self.dblsidedtool.install(icon=QtGui.QIcon('share/doubleside16.png'), separator=True)

        self.measurement_tool = Measurement(self)
        self.measurement_tool.install(icon=QtGui.QIcon('share/measure16.png'), separator=True)

        self.panelize_tool = Panelize(self)
        self.panelize_tool.install(icon=QtGui.QIcon('share/panel16.png'))

        self.film_tool = Film(self)
        self.film_tool.install(icon=QtGui.QIcon('share/film16.png'))

        self.paste_tool = SolderPaste(self)
        self.paste_tool.install(icon=QtGui.QIcon('share/solderpastebis32.png'))

        self.calculator_tool = ToolCalculator(self)
        self.calculator_tool.install(icon=QtGui.QIcon('share/calculator24.png'), separator=True)

        self.sub_tool = ToolSub(self)
        self.sub_tool.install(icon=QtGui.QIcon('share/sub32.png'), pos=self.ui.menutool, separator=True)

        self.move_tool = ToolMove(self)
        self.move_tool.install(icon=QtGui.QIcon('share/move16.png'), pos=self.ui.menuedit,
                               before=self.ui.menueditorigin)

        self.cutout_tool = CutOut(self)
        self.cutout_tool.install(icon=QtGui.QIcon('share/cut16_bis.png'), pos=self.ui.menutool,
                                 before=self.measurement_tool.menuAction)

        self.ncclear_tool = NonCopperClear(self)
        self.ncclear_tool.install(icon=QtGui.QIcon('share/ncc16.png'), pos=self.ui.menutool,
                                  before=self.measurement_tool.menuAction, separator=True)

        self.paint_tool = ToolPaint(self)
        self.paint_tool.install(icon=QtGui.QIcon('share/paint16.png'), pos=self.ui.menutool,
                                before=self.measurement_tool.menuAction, separator=True)

        self.transform_tool = ToolTransform(self)
        self.transform_tool.install(icon=QtGui.QIcon('share/transform.png'), pos=self.ui.menuoptions, separator=True)

        self.properties_tool = Properties(self)
        self.properties_tool.install(icon=QtGui.QIcon('share/properties32.png'), pos=self.ui.menuoptions)

        self.pdf_tool = ToolPDF(self)
        self.pdf_tool.install(icon=QtGui.QIcon('share/pdf32.png'), pos=self.ui.menufileimport,
                              separator=True)

        self.image_tool = ToolImage(self)
        self.image_tool.install(icon=QtGui.QIcon('share/image32.png'), pos=self.ui.menufileimport,
                                separator=True)
        self.pcb_wizard_tool = PcbWizard(self)
        self.pcb_wizard_tool.install(icon=QtGui.QIcon('share/drill32.png'), pos=self.ui.menufileimport)

        self.log.debug("Tools are installed.")

    def remove_tools(self):
        """
        Will remove all the actions in the Tool menu.
        :return: None
        """
        for act in self.ui.menutool.actions():
            self.ui.menutool.removeAction(act)

    def init_tools(self):
        """
        Initialize the Tool tab in the notebook side of the central widget.
        Remove the actions in the Tools menu.
        Instantiate again the FlatCAM tools (plugins).
        All this is required when changing the layout: standard, compact etc.

        :return: None
        """

        log.debug("init_tools()")

        # delete the data currently in the Tools Tab and the Tab itself
        widget = QtWidgets.QTabWidget.widget(self.ui.notebook, 2)
        if widget is not None:
            widget.deleteLater()
        self.ui.notebook.removeTab(2)

        # rebuild the Tools Tab
        self.ui.tool_tab = QtWidgets.QWidget()
        self.ui.tool_tab_layout = QtWidgets.QVBoxLayout(self.ui.tool_tab)
        self.ui.tool_tab_layout.setContentsMargins(2, 2, 2, 2)
        self.ui.notebook.addTab(self.ui.tool_tab, "Tool")
        self.ui.tool_scroll_area = VerticalScrollArea()
        self.ui.tool_tab_layout.addWidget(self.ui.tool_scroll_area)

        # reinstall all the Tools as some may have been removed when the data was removed from the Tools Tab
        # first remove all of them
        self.remove_tools()

        # re-add the TCL Shell action to the Tools menu and reconnect it to ist slot function
        self.ui.menutoolshell = self.ui.menutool.addAction(QtGui.QIcon('share/shell16.png'), '&Command Line\tS')
        self.ui.menutoolshell.triggered.connect(self.on_toggle_shell)

        # third install all of them
        self.install_tools()
        self.log.debug("Tools are initialized.")

    # def parse_system_fonts(self):
    #     self.worker_task.emit({'fcn': self.f_parse.get_fonts_by_types,
    #                            'params': []})

    def connect_toolbar_signals(self):
        """
        Reconnect the signals to the actions in the toolbar.
        This has to be done each time after the FlatCAM tools are removed/installed.

        :return: None
        """

        # Toolbar
        # self.ui.file_new_btn.triggered.connect(self.on_file_new)
        self.ui.file_open_btn.triggered.connect(self.on_file_openproject)
        self.ui.file_save_btn.triggered.connect(self.on_file_saveproject)
        self.ui.file_open_gerber_btn.triggered.connect(self.on_fileopengerber)
        self.ui.file_open_excellon_btn.triggered.connect(self.on_fileopenexcellon)

        self.ui.clear_plot_btn.triggered.connect(self.clear_plots)
        self.ui.replot_btn.triggered.connect(self.plot_all)
        self.ui.zoom_fit_btn.triggered.connect(self.on_zoom_fit)
        self.ui.zoom_in_btn.triggered.connect(lambda: self.plotcanvas.zoom(1 / 1.5))
        self.ui.zoom_out_btn.triggered.connect(lambda: self.plotcanvas.zoom(1.5))

        self.ui.newgeo_btn.triggered.connect(self.new_geometry_object)
        self.ui.newgrb_btn.triggered.connect(self.new_gerber_object)
        self.ui.newexc_btn.triggered.connect(self.new_excellon_object)
        self.ui.editgeo_btn.triggered.connect(self.object2editor)
        self.ui.update_obj_btn.triggered.connect(lambda: self.editor2object())
        self.ui.delete_btn.triggered.connect(self.on_delete)

        self.ui.shell_btn.triggered.connect(self.on_toggle_shell)
        self.ui.new_script_btn.triggered.connect(self.on_filenewscript)
        self.ui.open_script_btn.triggered.connect(self.on_fileopenscript)
        self.ui.run_script_btn.triggered.connect(self.on_filerunscript)

        # Tools Toolbar Signals
        self.ui.dblsided_btn.triggered.connect(lambda: self.dblsidedtool.run(toggle=True))
        self.ui.cutout_btn.triggered.connect(lambda: self.cutout_tool.run(toggle=True))
        self.ui.ncc_btn.triggered.connect(lambda: self.ncclear_tool.run(toggle=True))
        self.ui.paint_btn.triggered.connect(lambda: self.paint_tool.run(toggle=True))

        self.ui.panelize_btn.triggered.connect(lambda: self.panelize_tool.run(toggle=True))
        self.ui.film_btn.triggered.connect(lambda: self.film_tool.run(toggle=True))
        self.ui.solder_btn.triggered.connect(lambda: self.paste_tool.run(toggle=True))
        self.ui.sub_btn.triggered.connect(lambda: self.sub_tool.run(toggle=True))

        self.ui.calculators_btn.triggered.connect(lambda: self.calculator_tool.run(toggle=True))
        self.ui.transform_btn.triggered.connect(lambda: self.transform_tool.run(toggle=True))

    def object2editor(self):
        """
        Send the current Geometry or Excellon object (if any) into the it's editor.

        :return: None
        """
        self.report_usage("object2editor()")

        edited_object = self.collection.get_active()

        if isinstance(edited_object, FlatCAMGerber) or isinstance(edited_object, FlatCAMGeometry) or \
                isinstance(edited_object, FlatCAMExcellon):
            pass
        else:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Select a Geometry, Gerber or Excellon Object to edit."))
            return

        if isinstance(edited_object, FlatCAMGeometry):
            # store the Geometry Editor Toolbar visibility before entering in the Editor
            self.geo_editor.toolbar_old_state = True if self.ui.geo_edit_toolbar.isVisible() else False

            # we set the notebook to hidden
            self.ui.splitter.setSizes([0, 1])

            if edited_object.multigeo is True:
                edited_tools = [int(x.text()) for x in edited_object.ui.geo_tools_table.selectedItems()]
                if len(edited_tools) > 1:
                    self.inform.emit('[WARNING_NOTCL] %s' %
                                     _("Simultanoeus editing of tools geometry in a MultiGeo Geometry "
                                       "is not possible.\n"
                                       "Edit only one geometry at a time."))

                # determine the tool dia of the selected tool
                selected_tooldia = float(edited_object.ui.geo_tools_table.item((edited_tools[0] - 1), 1).text())

                # now find the key in the edited_object.tools that has this tooldia
                multi_tool = 1
                for tool in edited_object.tools:
                    if edited_object.tools[tool]['tooldia'] == selected_tooldia:
                        multi_tool = tool
                        break

                self.geo_editor.edit_fcgeometry(edited_object, multigeo_tool=multi_tool)
            else:
                self.geo_editor.edit_fcgeometry(edited_object)

            # set call source to the Editor we go into
            self.call_source = 'geo_editor'

        elif isinstance(edited_object, FlatCAMExcellon):
            # store the Excellon Editor Toolbar visibility before entering in the Editor
            self.exc_editor.toolbar_old_state = True if self.ui.exc_edit_toolbar.isVisible() else False

            if self.ui.splitter.sizes()[0] == 0:
                self.ui.splitter.setSizes([1, 1])

            self.exc_editor.edit_fcexcellon(edited_object)

            # set call source to the Editor we go into
            self.call_source = 'exc_editor'

        elif isinstance(edited_object, FlatCAMGerber):
            # store the Gerber Editor Toolbar visibility before entering in the Editor
            self.grb_editor.toolbar_old_state = True if self.ui.grb_edit_toolbar.isVisible() else False

            if self.ui.splitter.sizes()[0] == 0:
                self.ui.splitter.setSizes([1, 1])

            self.grb_editor.edit_fcgerber(edited_object)

            # set call source to the Editor we go into
            self.call_source = 'grb_editor'

        # make sure that we can't select another object while in Editor Mode:
        # self.collection.view.setSelectionMode(QtWidgets.QAbstractItemView.NoSelection)
        self.ui.project_frame.setDisabled(True)

        # delete any selection shape that might be active as they are not relevant in Editor
        self.delete_selection_shape()

        self.ui.plot_tab_area.setTabText(0, "EDITOR Area")
        self.ui.plot_tab_area.protectTab(0)
        self.inform.emit('[WARNING_NOTCL] %s' %
                         _("Editor is activated ..."))

        self.should_we_save = True

    def editor2object(self, cleanup=None):
        """
        Transfers the Geometry or Excellon from it's editor to the current object.

        :return: None
        """
        self.report_usage("editor2object()")

        # do not update a geometry or excellon object unless it comes out of an editor
        if self.call_source != 'app':
            edited_obj = self.collection.get_active()

            if cleanup is None:
                msgbox = QtWidgets.QMessageBox()
                msgbox.setText(_("Do you want to save the edited object?"))
                msgbox.setWindowTitle(_("Close Editor"))
                msgbox.setWindowIcon(QtGui.QIcon('share/save_as.png'))

                bt_yes = msgbox.addButton(_('Yes'), QtWidgets.QMessageBox.YesRole)
                bt_no = msgbox.addButton(_('No'), QtWidgets.QMessageBox.NoRole)
                bt_cancel = msgbox.addButton(_('Cancel'), QtWidgets.QMessageBox.RejectRole)

                msgbox.setDefaultButton(bt_yes)
                msgbox.exec_()
                response = msgbox.clickedButton()

                if response == bt_yes:
                    # clean the Tools Tab
                    self.ui.tool_scroll_area.takeWidget()
                    self.ui.tool_scroll_area.setWidget(QtWidgets.QWidget())
                    self.ui.notebook.setTabText(2, "Tool")

                    if isinstance(edited_obj, FlatCAMGeometry):
                        obj_type = "Geometry"
                        if cleanup is None:
                            self.geo_editor.update_fcgeometry(edited_obj)
                            self.geo_editor.update_options(edited_obj)
                        self.geo_editor.deactivate()

                        # update the geo object options so it is including the bounding box values
                        try:
                            xmin, ymin, xmax, ymax = edited_obj.bounds()
                            edited_obj.options['xmin'] = xmin
                            edited_obj.options['ymin'] = ymin
                            edited_obj.options['xmax'] = xmax
                            edited_obj.options['ymax'] = ymax
                        except AttributeError as e:
                            self.inform.emit('[WARNING] %s' %
                                             _("Object empty after edit."))
                            log.debug("App.editor2object() --> Geometry --> %s" % str(e))
                    elif isinstance(edited_obj, FlatCAMGerber):
                        obj_type = "Gerber"
                        if cleanup is None:
                            self.grb_editor.update_fcgerber()
                            self.grb_editor.update_options(edited_obj)
                        self.grb_editor.deactivate_grb_editor()

                        # delete the old object (the source object) if it was an empty one
                        if len(edited_obj.solid_geometry) == 0:
                            old_name = edited_obj.options['name']
                            self.collection.set_active(old_name)
                            self.collection.delete_active()

                    elif isinstance(edited_obj, FlatCAMExcellon):
                        obj_type = "Excellon"
                        if cleanup is None:
                            self.exc_editor.update_fcexcellon(edited_obj)
                            self.exc_editor.update_options(edited_obj)
                        self.exc_editor.deactivate()
                    else:
                        self.inform.emit('[WARNING_NOTCL] %s' %
                                         _("Select a Gerber, Geometry or Excellon Object to update."))
                        return

                    self.inform.emit('[selected] %s %s' %
                                     (obj_type, _("is updated, returning to App...")))
                elif response == bt_no:
                    # clean the Tools Tab
                    self.ui.tool_scroll_area.takeWidget()
                    self.ui.tool_scroll_area.setWidget(QtWidgets.QWidget())
                    self.ui.notebook.setTabText(2, "Tool")

                    if isinstance(edited_obj, FlatCAMGeometry):
                        self.geo_editor.deactivate()
                    elif isinstance(edited_obj, FlatCAMGerber):
                        self.grb_editor.deactivate_grb_editor()
                    elif isinstance(edited_obj, FlatCAMExcellon):
                        self.exc_editor.deactivate()
                        # set focus on the project tab
                        self.ui.notebook.setCurrentWidget(self.ui.project_tab)
                    else:
                        self.inform.emit('[WARNING_NOTCL] %s' %
                                         _("Select a Gerber, Geometry or Excellon Object to update."))
                        return
                elif response == bt_cancel:
                    return
            else:
                if isinstance(edited_obj, FlatCAMGeometry):
                    self.geo_editor.deactivate()
                elif isinstance(edited_obj, FlatCAMGerber):
                    self.grb_editor.deactivate_grb_editor()
                elif isinstance(edited_obj, FlatCAMExcellon):
                    self.exc_editor.deactivate()
                else:
                    self.inform.emit('[WARNING_NOTCL] %s' %
                                     _("Select a Gerber, Geometry or Excellon Object to update."))
                    return

            # if notebook is hidden we show it
            if self.ui.splitter.sizes()[0] == 0:
                self.ui.splitter.setSizes([1, 1])

            # restore the call_source to app
            self.call_source = 'app'

            edited_obj.plot()
            self.ui.plot_tab_area.setTabText(0, "Plot Area")
            self.ui.plot_tab_area.protectTab(0)

            # make sure that we reenable the selection on Project Tab after returning from Editor Mode:
            # self.collection.view.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
            self.ui.project_frame.setDisabled(False)

    def get_last_folder(self):
        """
        Get the folder path from where the last file was opened.
        :return: String, last opened folder path
        """
        return self.defaults["global_last_folder"]

    def get_last_save_folder(self):
        """
        Get the folder path from where the last file was saved.
        :return: String, last saved folder path
        """
        loc = self.defaults["global_last_save_folder"]
        if loc is None:
            loc = self.defaults["global_last_folder"]
        if loc is None:
            loc = os.path.dirname(__file__)
        return loc

    def report_usage(self, resource):
        """
        Increments usage counter for the given resource
        in self.defaults['global_stats'].

        :param resource: Name of the resource.
        :return: None
        """

        if resource in self.defaults['global_stats']:
            self.defaults['global_stats'][resource] += 1
        else:
            self.defaults['global_stats'][resource] = 1

    def init_tcl(self):
        """
        Initialize the TCL Shell. A dock widget that holds the GUI interface to the FlatCAM command line.
        :return: None
        """
        if hasattr(self, 'tcl'):
            # self.tcl = None
            # TODO  we need  to clean  non default variables and procedures here
            # new object cannot be used here as it  will not remember values created for next passes,
            # because tcl  was execudted in old instance of TCL
            pass
        else:
            self.tcl = tk.Tcl()
            self.setup_shell()
        self.log.debug("TCL Shell has been initialized.")

    # TODO: This shouldn't be here.
    class TclErrorException(Exception):
        """
        this exception is defined here, to be able catch it if we successfully handle all errors from shell command
        """
        pass

    def shell_message(self, msg, show=False, error=False, warning=False, success=False, selected=False):
        """
        Shows a message on the FlatCAM Shell

        :param msg: Message to display.
        :param show: Opens the shell.
        :param error: Shows the message as an error.
        :param warning: Shows the message as an warning.
        :param success: Shows the message as an success.
        :param selected: Indicate that something was selected on canvas
        :return: None
        """
        if show:
            self.ui.shell_dock.show()
        try:
            if error:
                self.shell.append_error(msg + "\n")
            elif warning:
                self.shell.append_warning(msg + "\n")
            elif success:
                self.shell.append_success(msg + "\n")
            elif selected:
                self.shell.append_selected(msg + "\n")
            else:
                self.shell.append_output(msg + "\n")
        except AttributeError:
            log.debug("shell_message() is called before Shell Class is instantiated. The message is: %s", str(msg))

    def raise_tcl_unknown_error(self, unknownException):
        """
        Raise exception if is different type than TclErrorException
        this is here mainly to show unknown errors inside TCL shell console.

        :param unknownException:
        :return:
        """

        if not isinstance(unknownException, self.TclErrorException):
            self.raise_tcl_error("Unknown error: %s" % str(unknownException))
        else:
            raise unknownException

    def display_tcl_error(self, error, error_info=None):
        """
        Escape bracket [ with '\' otherwise there is error
        "ERROR: missing close-bracket" instead of real error

        :param error: it may be text  or exception
        :param error_info: Some informations about the error
        :return: None
        """

        if isinstance(error, Exception):
            exc_type, exc_value, exc_traceback = error_info
            if not isinstance(error, self.TclErrorException):
                show_trace = 1
            else:
                show_trace = int(self.defaults['global_verbose_error_level'])

            if show_trace > 0:
                trc = traceback.format_list(traceback.extract_tb(exc_traceback))
                trc_formated = []
                for a in reversed(trc):
                    trc_formated.append(a.replace("    ", " > ").replace("\n", ""))
                text = "%s\nPython traceback: %s\n%s" % (exc_value, exc_type, "\n".join(trc_formated))
            else:
                text = "%s" % error
        else:
            text = error

        text = text.replace('[', '\\[').replace('"', '\\"')
        self.tcl.eval('return -code error "%s"' % text)

    def raise_tcl_error(self, text):
        """
        This method  pass exception from python into TCL as error, so we get stacktrace and reason

        :param text: text of error
        :return: raise exception
        """

        self.display_tcl_error(text)
        raise self.TclErrorException(text)

    def exec_command(self, text, no_echo=False):
        """
        Handles input from the shell. See FlatCAMApp.setup_shell for shell commands.
        Also handles execution in separated threads

        :param text: FlatCAM TclCommand with parameters
        :param no_echo: If True it will not try to print to the Shell because most likely the shell is hidden and it
        will create crashes of the _Expandable_Edit widget
        :return: output if there was any
        """

        self.report_usage('exec_command')

        result = self.exec_command_test(text, False, no_echo=no_echo)

        # MS: added this method call so the geometry is updated once the TCL command is executed
        # if no_plot is None:
        #     self.plot_all()

        return result

    def exec_command_test(self, text, reraise=True, no_echo=False):
        """
        Same as exec_command(...) with additional control over  exceptions.
        Handles input from the shell. See FlatCAMApp.setup_shell for shell commands.

        :param text: Input command
        :param reraise: Re-raise TclError exceptions in Python (mostly for unitttests).
        :param no_echo: If True it will not try to print to the Shell because most likely the shell is hidden and it
        will create crashes of the _Expandable_Edit widget
        :return: Output from the command
        """

        tcl_command_string = str(text)

        try:
            if no_echo is False:
                self.shell.open_proccessing()  # Disables input box.

            result = self.tcl.eval(str(tcl_command_string))
            if result != 'None' and no_echo is False:
                self.shell.append_output(result + '\n')

        except tk.TclError as e:
            # This will display more precise answer if something in TCL shell fails
            result = self.tcl.eval("set errorInfo")
            self.log.error("Exec command Exception: %s" % (result + '\n'))
            if no_echo is False:
                self.shell.append_error('ERROR: ' + result + '\n')
            # Show error in console and just return or in test raise exception
            if reraise:
                raise e
        finally:
            if no_echo is False:
                self.shell.close_proccessing()
            pass
        return result

        # """
        # Code below is unsused. Saved for later.
        # """

        # parts = re.findall(r'([\w\\:\.]+|".*?")+', text)
        # parts = [p.replace('\n', '').replace('"', '') for p in parts]
        # self.log.debug(parts)
        # try:
        #     if parts[0] not in commands:
        #         self.shell.append_error("Unknown command\n")
        #         return
        #
        #     #import inspect
        #     #inspect.getargspec(someMethod)
        #     if (type(commands[parts[0]]["params"]) is not list and len(parts)-1 != commands[parts[0]]["params"]) or \
        #             (type(commands[parts[0]]["params"]) is list and len(parts)-1 not in commands[parts[0]]["params"]):
        #         self.shell.append_error(
        #             "Command %s takes %d arguments. %d given.\n" %
        #             (parts[0], commands[parts[0]]["params"], len(parts)-1)
        #         )
        #         return
        #
        #     cmdfcn = commands[parts[0]]["fcn"]
        #     cmdconv = commands[parts[0]]["converters"]
        #     if len(parts) - 1 > 0:
        #         retval = cmdfcn(*[cmdconv[i](parts[i + 1]) for i in range(len(parts)-1)])
        #     else:
        #         retval = cmdfcn()
        #     retfcn = commands[parts[0]]["retfcn"]
        #     if retval and retfcn(retval):
        #         self.shell.append_output(retfcn(retval) + "\n")
        #
        # except Exception as e:
        #     #self.shell.append_error(''.join(traceback.format_exc()))
        #     #self.shell.append_error("?\n")
        #     self.shell.append_error(str(e) + "\n")

    def info(self, msg):
        """
        Informs the user. Normally on the status bar, optionally
        also on the shell.

        :param msg: Text to write.
        :return: None
        """

        # Type of message in brackets at the beginning of the message.
        match = re.search("\[([^\]]+)\](.*)", msg)
        if match:
            level = match.group(1)
            msg_ = match.group(2)
            self.ui.fcinfo.set_status(str(msg_), level=level)

            if level.lower() == "error":
                self.shell_message(msg, error=True, show=True)
            elif level.lower() == "warning":
                self.shell_message(msg, warning=True, show=True)

            elif level.lower() == "error_notcl":
                self.shell_message(msg, error=True, show=False)

            elif level.lower() == "warning_notcl":
                self.shell_message(msg, warning=True, show=False)

            elif level.lower() == "success":
                self.shell_message(msg, success=True, show=False)

            elif level.lower() == "selected":
                self.shell_message(msg, selected=True, show=False)

            else:
                self.shell_message(msg, show=False)

        else:
            self.ui.fcinfo.set_status(str(msg), level="info")

            # make sure that if the message is to clear the infobar with a space
            # is not printed over and over on the shell
            if msg != '':
                self.shell_message(msg)

    def restore_toolbar_view(self):
        """
        Some toolbars may be hidden by user and here we restore the state of the toolbars visibility that
        was saved in the defaults dictionary.

        :return: None
        """
        tb = self.defaults["global_toolbar_view"]
        if tb & 1:
            self.ui.toolbarfile.setVisible(True)
        else:
            self.ui.toolbarfile.setVisible(False)

        if tb & 2:
            self.ui.toolbargeo.setVisible(True)
        else:
            self.ui.toolbargeo.setVisible(False)

        if tb & 4:
            self.ui.toolbarview.setVisible(True)
        else:
            self.ui.toolbarview.setVisible(False)

        if tb & 8:
            self.ui.toolbartools.setVisible(True)
        else:
            self.ui.toolbartools.setVisible(False)

        if tb & 16:
            self.ui.exc_edit_toolbar.setVisible(True)
        else:
            self.ui.exc_edit_toolbar.setVisible(False)

        if tb & 32:
            self.ui.geo_edit_toolbar.setVisible(True)
        else:
            self.ui.geo_edit_toolbar.setVisible(False)

        if tb & 64:
            self.ui.grb_edit_toolbar.setVisible(True)
        else:
            self.ui.grb_edit_toolbar.setVisible(False)

        if tb & 128:
            self.ui.snap_toolbar.setVisible(True)
        else:
            self.ui.snap_toolbar.setVisible(False)

        if tb & 256:
            self.ui.toolbarshell.setVisible(True)
        else:
            self.ui.toolbarshell.setVisible(False)

    def load_defaults(self, filename):
        """
        Loads the aplication's default settings from current_defaults.FlatConfig into
        ``self.defaults``.

        :return: None
        """
        try:
            f = open(self.data_path + "/" + filename + ".FlatConfig")
            options = f.read()
            f.close()
        except IOError:
            self.log.error("Could not load defaults file.")
            self.inform.emit('[ERROR] %s' %
                             _("Could not load defaults file."))
            # in case the defaults file can't be loaded, show all toolbars
            self.defaults["global_toolbar_view"] = 511
            return

        try:
            defaults = json.loads(options)
        except:
            # in case the defaults file can't be loaded, show all toolbars
            self.defaults["global_toolbar_view"] = 511
            e = sys.exc_info()[0]
            App.log.error(str(e))
            self.inform.emit('[ERROR] %s' %
                             _("Failed to parse defaults file."))
            return
        self.defaults.update(defaults)
        log.debug("FlatCAM defaults loaded from: %s" % filename)

        # restore the toolbar view
        self.restore_toolbar_view()

    def on_import_preferences(self):
        """
        Loads the aplication's factory default settings from factory_defaults.FlatConfig into
        ``self.defaults``.

        :return: None
        """

        self.report_usage("on_import_preferences")
        App.log.debug("on_import_preferences()")

        filter_ = "Config File (*.FlatConfig);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Import FlatCAM Preferences"),
                                                                 directory=self.data_path,
                                                                 filter=filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Import FlatCAM Preferences"),
                                                                 filter=filter_)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("FlatCAM preferences import cancelled."))
        else:
            try:
                f = open(filename)
                options = f.read()
                f.close()
            except IOError:
                self.log.error("Could not load defaults file.")
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Could not load defaults file."))
                return

            try:
                defaults_from_file = json.loads(options)
            except Exception as e:
                e = sys.exc_info()[0]
                App.log.error(str(e))
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Failed to parse defaults file."))
                return
            self.defaults.update(defaults_from_file)
            self.on_preferences_edited()
            self.inform.emit('[success] %s: %s' %
                             (_("Imported Defaults from"), filename))

    def on_export_preferences(self):
        """
        Save the defaults dictionary to a file.

        :return: None
        """
        self.report_usage("on_export_preferences")
        App.log.debug("on_export_preferences()")

        defaults_file_content = None

        self.date = str(datetime.today()).rpartition('.')[0]
        self.date = ''.join(c for c in self.date if c not in ':-')
        self.date = self.date.replace(' ', '_')

        filter__ = "Config File (*.FlatConfig);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export FlatCAM Preferences"),
                directory=self.data_path + '/preferences_' + self.date,
                filter=filter__
            )
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export FlatCAM Preferences"),
                                                                 filter=filter__)

        filename = str(filename)
        defaults_from_file = {}

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("FlatCAM preferences export cancelled."))
            return
        else:
            try:
                f = open(filename, 'w')
                defaults_file_content = f.read()
                f.close()
            except PermissionError:
                self.inform.emit('[WARNING] %s' %
                                 _("Permission denied, saving not possible.\n"
                                   "Most likely another app is holding the file open and not accessible."))
                return
            except IOError:
                App.log.debug('Creating a new preferences file ...')
                f = open(filename, 'w')
                json.dump({}, f)
                f.close()
            except:
                e = sys.exc_info()[0]
                App.log.error("Could not load defaults file.")
                App.log.error(str(e))
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Could not load preferences file."))
                return

            try:
                defaults_from_file = json.loads(defaults_file_content)
            except:
                App.log.warning("Trying to read an empty Preferences file. Continue.")

            # Update options
            self.defaults_read_form()
            defaults_from_file.update(self.defaults)
            self.propagate_defaults(silent=True)

            # Save update options
            try:
                f = open(filename, "w")
                json.dump(defaults_from_file, f, default=to_dict, indent=2, sort_keys=True)
                f.close()
            except:
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Failed to write defaults to file."))
                return
        if self.defaults["global_open_style"] is False:
            self.file_opened.emit("preferences", filename)
        self.file_saved.emit("preferences", filename)
        self.inform.emit('[success] %s: %s' %
                         (_("Exported preferences to"), filename))

    def on_preferences_open_folder(self):
        """
        Will open an Explorer window set to the folder path where the FlatCAM preferences files are usually saved.

        :return: None
        """
        self.report_usage("on_preferences_open_folder()")

        if sys.platform == 'win32':
            subprocess.Popen('explorer %s' % self.data_path)
        elif sys.platform == 'darwin':
            os.system('open "%s"' % self.data_path)
        else:
            subprocess.Popen(['xdg-open', self.data_path])
        self.inform.emit('[success] %s' %
                         _("FlatCAM Preferences Folder opened."))

    def save_geometry(self, x, y, width, height, notebook_width):
        """
        Will save the application geometry and positions in the defaults discitionary to be restored at the next
        launch of the application.

        :param x: X position of the main window
        :param y: Y position of the main window
        :param width: width of the main window
        :param height: height of the main window
        :param notebook_width: the notebook width is adjustable so it get saved here, too.

        :return: None
        """
        self.defaults["global_def_win_x"] = x
        self.defaults["global_def_win_y"] = y
        self.defaults["global_def_win_w"] = width
        self.defaults["global_def_win_h"] = height
        self.defaults["global_def_notebook_width"] = notebook_width
        self.save_defaults()

    def message_dialog(self, title, message, kind="info"):
        """
        Builds and show a custom QMessageBox to be used in FlatCAM.

        :param title: title of the QMessageBox
        :param message: message to be displayed
        :param kind: type of QMessageBox; will display a specific icon.
        :return:
        """
        icon = {"info": QtWidgets.QMessageBox.Information,
                "warning": QtWidgets.QMessageBox.Warning,
                "error": QtWidgets.QMessageBox.Critical}[str(kind)]
        dlg = QtWidgets.QMessageBox(icon, title, message, parent=self.ui)
        dlg.setText(message)
        dlg.exec_()

    def register_recent(self, kind, filename):
        """
        Will register the files opened into record dictionaries. The FlatCAM projects has it's own
        dictionary.

        :param kind: type of file that was opened
        :param filename: the path and file name for the file that was opened
        :return:
        """
        self.log.debug("register_recent()")
        self.log.debug("   %s" % kind)
        self.log.debug("   %s" % filename)

        record = {'kind': str(kind), 'filename': str(filename)}
        if record in self.recent:
            return
        if record in self.recent_projects:
            return

        if record['kind'] == 'project':
            self.recent_projects.insert(0, record)
        else:
            self.recent.insert(0, record)

        if len(self.recent) > self.defaults['global_recent_limit']:  # Limit reached
            self.recent.pop()

        if len(self.recent_projects) > self.defaults['global_recent_limit']:  # Limit reached
            self.recent_projects.pop()

        try:
            f = open(self.data_path + '/recent.json', 'w')
        except IOError:
            App.log.error("Failed to open recent items file for writing.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _('Failed to open recent files file for writing.'))
            return

        json.dump(self.recent, f, default=to_dict, indent=2, sort_keys=True)
        f.close()

        try:
            fp = open(self.data_path + '/recent_projects.json', 'w')
        except IOError:
            App.log.error("Failed to open recent items file for writing.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _('Failed to open recent projects file for writing.'))
            return

        json.dump(self.recent_projects, fp, default=to_dict, indent=2, sort_keys=True)
        fp.close()

        # Re-build the recent items menu
        self.setup_recent_items()

    def new_object(self, kind, name, initialize, active=True, fit=True, plot=True, autoselected=True):
        """
        Creates a new specialized FlatCAMObj and attaches it to the application,
        this is, updates the GUI accordingly, any other records and plots it.
        This method is thread-safe.

        Notes:
            * If the name is in use, the self.collection will modify it
              when appending it to the collection. There is no need to handle
              name conflicts here.

        :param kind: The kind of object to create. One of 'gerber', 'excellon', 'cncjob' and 'geometry'.
        :type kind: str
        :param name: Name for the object.
        :type name: str
        :param initialize: Function to run after creation of the object but before it is attached to the application.
        The function is called with 2 parameters: the new object and the App instance.
        :type initialize: function
        :param active:
        :param fit:
        :param plot: If to plot the resulting object
        :param autoselected: if the resulting object is autoselected in the Project tab and therefore in the
        self.colleaction
        :return: None
        :rtype: None
        """

        App.log.debug("new_object()")
        obj_plot = plot
        obj_autoselected = autoselected

        t0 = time.time()  # Debug

        # ## Create object
        classdict = {
            "gerber": FlatCAMGerber,
            "excellon": FlatCAMExcellon,
            "cncjob": FlatCAMCNCjob,
            "geometry": FlatCAMGeometry
        }

        App.log.debug("Calling object constructor...")
        obj = classdict[kind](name)
        obj.units = self.options["units"]  # TODO: The constructor should look at defaults.

        # Set options from "Project options" form
        self.options_read_form()

        # IMPORTANT
        # The key names in defaults and options dictionary's are not random:
        # they have to have in name first the type of the object (geometry, excellon, cncjob and gerber) or how it's
        # called here, the 'kind' followed by an underline. The function called above (self.options_read_form()) copy
        # the options from project options form into the self.options. After that, below, depending on the type of
        # object that is created, it will strip the name of the object and the underline (if the original key was
        # let's say "excellon_toolchange", it will strip the excellon_) and to the obj.options the key will become
        # "toolchange"
        for option in self.options:
            if option.find(kind + "_") == 0:
                oname = option[len(kind) + 1:]
                obj.options[oname] = self.options[option]

        obj.isHovering = False
        obj.notHovering = True

        # Initialize as per user request
        # User must take care to implement initialize
        # in a thread-safe way as is is likely that we
        # have been invoked in a separate thread.
        t1 = time.time()
        self.log.debug("%f seconds before initialize()." % (t1 - t0))
        try:
            return_value = initialize(obj, self)
        except Exception as e:
            msg = '[ERROR_NOTCL] %s' % \
                  _("An internal error has ocurred. See shell.\n")
            msg += _("Object ({kind}) failed because: {error} \n\n").format(kind=kind, error=str(e))
            msg += traceback.format_exc()
            self.inform.emit(msg)

            # if str(e) == "Empty Geometry":
            #     self.inform.emit("[ERROR_NOTCL] )
            # else:
            #     self.inform.emit("[ERROR] Object (%s) failed because: %s" % (kind, str(e)))
            return "fail"

        t2 = time.time()
        self.log.debug("%f seconds executing initialize()." % (t2 - t1))

        if return_value == 'fail':
            log.debug("Object (%s) parsing and/or geometry creation failed." % kind)
            return "fail"

        # Check units and convert if necessary
        # This condition CAN be true because initialize() can change obj.units
        if self.options["units"].upper() != obj.units.upper():
            self.inform.emit('%s: %s' %
                             (_("Converting units to "), self.options["units"]))
            obj.convert_units(self.options["units"])
            t3 = time.time()
            self.log.debug("%f seconds converting units." % (t3 - t2))

        # Create the bounding box for the object and then add the results to the obj.options
        try:
            xmin, ymin, xmax, ymax = obj.bounds()
            obj.options['xmin'] = xmin
            obj.options['ymin'] = ymin
            obj.options['xmax'] = xmax
            obj.options['ymax'] = ymax
        except Exception as e:
            log.warning("The object has no bounds properties. %s" % str(e))
            return "fail"

        FlatCAMApp.App.log.debug("Moving new object back to main thread.")

        # Move the object to the main thread and let the app know that it is available.
        obj.moveToThread(self.main_thread)

        self.object_created.emit(obj, obj_plot, obj_autoselected)

        return obj

    def new_excellon_object(self):
        """
        Creates a new, blank Excellon object.

        :return: None
        """
        self.report_usage("new_excellon_object()")

        self.new_object('excellon', 'new_exc', lambda x, y: None, plot=False)

    def new_geometry_object(self):
        """
        Creates a new, blank and single-tool Geometry object.

        :return: None
        """
        self.report_usage("new_geometry_object()")

        def initialize(obj, self):
            obj.multitool = False

        self.new_object('geometry', 'new_geo', initialize, plot=False)

    def new_gerber_object(self):
        """
        Creates a new, blank Gerber object.

        :return: None
        """
        self.report_usage("new_gerber_object()")

        def initialize(grb_obj, self):
            grb_obj.multitool = False
            grb_obj.source_file = []
            grb_obj.multigeo = False
            grb_obj.follow = False
            grb_obj.apertures = {}
            grb_obj.solid_geometry = []

            try:
                grb_obj.options['xmin'] = 0
                grb_obj.options['ymin'] = 0
                grb_obj.options['xmax'] = 0
                grb_obj.options['ymax'] = 0
            except KeyError:
                pass

        self.new_object('gerber', 'new_grb', initialize, plot=False)

    def on_object_created(self, obj, plot, autoselect):
        """
        Event callback for object creation.
        It will add the new object to the collection. After that it will plot the object in a threaded way

        :param obj: The newly created FlatCAM object.
        :param plot: if the newly create object t obe plotted
        :param autoselect: if the newly created object to be autoselected after creation
        :return: None
        """
        t0 = time.time()  # DEBUG
        self.log.debug("on_object_created()")

        # The Collection might change the name if there is a collision
        self.collection.append(obj)

        # after adding the object to the collection always update the list of objects that are in the collection
        self.all_objects_list = self.collection.get_list()

        # self.inform.emit('[selected] %s created & selected: %s' %
        #                  (str(obj.kind).capitalize(), str(obj.options['name'])))
        if obj.kind == 'gerber':
            self.inform.emit(_('[selected] {kind} created/selected: <span style="color:{color};">{name}</span>').format(
                kind=obj.kind.capitalize(), color='green', name=str(obj.options['name'])))
        elif obj.kind == 'excellon':
            self.inform.emit(_('[selected] {kind} created/selected: <span style="color:{color};">{name}</span>').format(
                kind=obj.kind.capitalize(), color='brown', name=str(obj.options['name'])))
        elif obj.kind == 'cncjob':
            self.inform.emit(_('[selected] {kind} created/selected: <span style="color:{color};">{name}</span>').format(
                kind=obj.kind.capitalize(), color='blue', name=str(obj.options['name'])))
        elif obj.kind == 'geometry':
            self.inform.emit(_('[selected] {kind} created/selected: <span style="color:{color};">{name}</span>').format(
                kind=obj.kind.capitalize(), color='red', name=str(obj.options['name'])))

        # update the SHELL auto-completer model with the name of the new object
        self.myKeywords.append(obj.options['name'])
        self.shell._edit.set_model_data(self.myKeywords)
        self.ui.code_editor.set_model_data(self.myKeywords)

        if autoselect:
            # select the just opened object but deselect the previous ones
            self.collection.set_all_inactive()
            self.collection.set_active(obj.options["name"])
        else:
            self.collection.set_all_inactive()

        # here it is done the object plotting
        def worker_task(t_obj):
            with self.proc_container.new(_("Plotting")):
                if isinstance(t_obj, FlatCAMCNCjob):
                    t_obj.plot(kind=self.defaults["cncjob_plot_kind"])
                else:
                    t_obj.plot()
                t1 = time.time()  # DEBUG
                self.log.debug("%f seconds adding object and plotting." % (t1 - t0))
                self.object_plotted.emit(t_obj)

        # Send to worker
        # self.worker.add_task(worker_task, [self])
        if plot is True:
            self.worker_task.emit({'fcn': worker_task, 'params': [obj]})

    def on_object_changed(self, obj):
        """
        Called whenever the geometry of the object was changed in some way.
        This require the update of it's bounding values so it can be the selected on canvas.
        Update the bounding box data from obj.options

        :param obj: the object that was changed
        :return: None
        """

        xmin, ymin, xmax, ymax = obj.bounds()
        obj.options['xmin'] = xmin
        obj.options['ymin'] = ymin
        obj.options['xmax'] = xmax
        obj.options['ymax'] = ymax

        log.debug("Object changed, updating the bounding box data on self.options")
        # delete the old selection shape
        self.delete_selection_shape()
        self.should_we_save = True

    def on_object_plotted(self, obj):
        """
        Callback called whenever the plotted object needs to be fit into the viewport (canvas)

        :param obj: object to be fit into view
        :return: None
        """
        self.on_zoom_fit(None)

    def options_read_form(self):
        """
        Same as it's equivalent from the defaults.
        self.options use to store the preferences per project. No longer used.
        :return: None
        """
        for option in self.options_form_fields:
            self.options[option] = self.options_form_fields[option].get_value()

    def options_write_form(self):
        """
        Same as it's equivalent from the defaults.
        self.options use to store the preferences per project. No longer used.
        :return: None
        """
        for option in self.options:
            self.options_write_form_field(option)

    def options_write_form_field(self, field):
        """
        Same as it's equivalent from the defaults.
        self.options use to store the preferences per project. No longer used.
        :return: None
        """
        try:
            self.options_form_fields[field].set_value(self.options[field])
        except KeyError:
            # Changed from error to debug. This allows to have data stored
            # which is not user-editable.
            # self.log.debug("options_write_form_field(): No field for: %s" % field)
            pass

    def on_about(self):
        """
        Displays the "about" dialog found in the Menu --> Help.

        :return: None
        """
        self.report_usage("on_about")

        version = self.version
        version_date = self.version_date
        beta = self.beta

        class AboutDialog(QtWidgets.QDialog):
            def __init__(self, parent=None):
                QtWidgets.QDialog.__init__(self, parent)

                # Icon and title
                self.setWindowIcon(parent.app_icon)
                self.setWindowTitle(_("About FlatCAM"))
                self.resize(600, 200)
                # self.setStyleSheet("background-image: url(share/flatcam_icon256.png); background-attachment: fixed")
                # self.setStyleSheet(
                #     "border-image: url(share/flatcam_icon256.png) 0 0 0 0 stretch stretch; "
                #     "background-attachment: fixed"
                # )

                # bgimage = QtGui.QImage('share/flatcam_icon256.png')
                # s_bgimage = bgimage.scaled(QtCore.QSize(self.frameGeometry().width(), self.frameGeometry().height()))
                # palette = QtGui.QPalette()
                # palette.setBrush(10, QtGui.QBrush(bgimage))  # 10 = Windowrole
                # self.setPalette(palette)

                logo = QtWidgets.QLabel()
                logo.setPixmap(QtGui.QPixmap('share/flatcam_icon256.png'))

                title = QtWidgets.QLabel(
                    "<font size=8><B>FlatCAM</B></font><BR>"
                    "{title}<BR>"
                    "<BR>"
                    "<BR>"
                    # "<B>{devel}</B> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
                    "<a href = \"https://bitbucket.org/jpcgt/flatcam/src/Beta/\"><B>{devel}</B></a><BR>"
                    # "<b>{down}</B> area &nbsp;&nbsp;&nbsp;&nbsp;"
                    "<a href = \"https://bitbucket.org/jpcgt/flatcam/downloads/\"><b>{down}</B></a><BR>"
                    # "<b> {issue}</B> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
                    "<a href = \"https://bitbucket.org/jpcgt/flatcam/issues?status=new&status=open/\">"
                    "<B>{issue}</B></a><BR>".format(
                        title=_("2D Computer-Aided Printed Circuit Board Manufacturing"),
                        devel=_("Development"),
                        down=_("DOWNLOAD"),
                        issue=_("Issue tracker"))
                )
                title.setOpenExternalLinks(True)

                closebtn = QtWidgets.QPushButton(_("Close"))

                tab_widget = QtWidgets.QTabWidget()
                description_label = QtWidgets.QLabel(
                    "FlatCAM {version} {beta} ({date}) - {arch}<br>"
                    "<a href = \"http://flatcam.org/\">http://flatcam.org</a><br>".format(
                        version=version,
                        beta=('BETA' if beta else ''),
                        date=version_date,
                        arch=platform.architecture()[0])
                )
                description_label.setOpenExternalLinks(True)

                license_label = QtWidgets.QLabel(
                    _(
                        '(c) Copyright 2014 Juan Pablo Caram.\n\n'
                        'Licensed under the MIT license:\n'
                        'http://www.opensource.org/licenses/mit-license.php\n\n'
                        'Permission is hereby granted, free of charge, to any person obtaining a copy\n'
                        'of this software and associated documentation files (the "Software"), to deal\n'
                        'in the Software without restriction, including without limitation the rights\n'
                        'to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n'
                        'copies of the Software, and to permit persons to whom the Software is\n'
                       ' furnished to do so, subject to the following conditions:\n\n'

                        'The above copyright notice and this permission notice shall be included in\n'
                        'all copies or substantial portions of the Software.\n\n'

                        'THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n'
                        'IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n'
                        'FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n'
                        'AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n'
                        'LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n'
                        'OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n'
                        'THE SOFTWARE.'
                    )
                )
                license_label.setOpenExternalLinks(True)

                # layouts
                layout1 = QtWidgets.QVBoxLayout()
                layout1_1 = QtWidgets.QHBoxLayout()
                layout1_2 = QtWidgets.QHBoxLayout()

                layout2 = QtWidgets.QHBoxLayout()
                layout3 = QtWidgets.QHBoxLayout()

                self.setLayout(layout1)
                layout1.addLayout(layout1_1)
                layout1.addLayout(layout1_2)

                layout1.addLayout(layout2)
                layout1.addLayout(layout3)

                layout1_1.addStretch()
                layout1_1.addWidget(description_label)
                layout1_2.addWidget(tab_widget)

                self.splash_tab = QtWidgets.QWidget()
                self.splash_tab.setObjectName("splash_about")
                self.splash_tab_layout = QtWidgets.QHBoxLayout(self.splash_tab)
                self.splash_tab_layout.setContentsMargins(2, 2, 2, 2)
                tab_widget.addTab(self.splash_tab, _("Splash"))

                self.programmmers_tab = QtWidgets.QWidget()
                self.programmmers_tab.setObjectName("programmers_about")
                self.programmmers_tab_layout = QtWidgets.QVBoxLayout(self.programmmers_tab)
                self.programmmers_tab_layout.setContentsMargins(2, 2, 2, 2)
                tab_widget.addTab(self.programmmers_tab, _("Programmers"))

                self.translators_tab = QtWidgets.QWidget()
                self.translators_tab.setObjectName("translators_about")
                self.translators_tab_layout = QtWidgets.QVBoxLayout(self.translators_tab)
                self.translators_tab_layout.setContentsMargins(2, 2, 2, 2)
                tab_widget.addTab(self.translators_tab, _("Translators"))

                self.license_tab = QtWidgets.QWidget()
                self.license_tab.setObjectName("license_about")
                self.license_tab_layout = QtWidgets.QVBoxLayout(self.license_tab)
                self.license_tab_layout.setContentsMargins(2, 2, 2, 2)
                tab_widget.addTab(self.license_tab, _("License"))

                self.splash_tab_layout.addWidget(logo, stretch=0)
                self.splash_tab_layout.addWidget(title, stretch=1)

                pal = QtGui.QPalette()
                pal.setColor(QtGui.QPalette.Background, Qt.white)

                self.prog_form_lay = QtWidgets.QFormLayout()
                self.prog_form_lay.setHorizontalSpacing(20)

                prog_widget = QtWidgets.QWidget()
                prog_widget.setLayout(self.prog_form_lay)
                prog_scroll = QtWidgets.QScrollArea()
                prog_scroll.setWidget(prog_widget)
                prog_scroll.setWidgetResizable(True)
                prog_scroll.setFrameShape(QtWidgets.QFrame.NoFrame)
                prog_scroll.setPalette(pal)

                self.programmmers_tab_layout.addWidget(prog_scroll)

                self.prog_form_lay.addRow(QtWidgets.QLabel('<b>%s</b>' % _("Programmer")),
                                          QtWidgets.QLabel('<b>%s</b>' % _("Status")))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Juan Pablo Caram"),
                                          QtWidgets.QLabel('%s' % _("Program Author")))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Denis Hayrullin"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Kamil Sopko"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Marius Stanciu"),
                                          QtWidgets.QLabel('%s' % _("Maintainer >=2019")))
                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Alexandru Lazar"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Matthieu Berthomé"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Mike Evans"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Victor Benso"))
                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Barnaby Walters"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Jørn Sandvik Nilsson"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Lei Zheng"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Marco A Quezada"))
                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Cedric Dussud"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Chris Hemingway"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Damian Wrobel"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Daniel Sallin"))
                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Bruno Vunderl"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Gonzalo Lopez"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Jakob Staudt"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Mike Smith"))

                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Lubos Medovarsky"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Steve Martina"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "Thomas Duffin"))
                self.prog_form_lay.addRow(QtWidgets.QLabel(''))

                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "@Idechix"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "@SM"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "@grbf"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "@Symonty"))
                self.prog_form_lay.addRow(QtWidgets.QLabel('%s' % "@mgix"))

                self.translator_grid_lay = QtWidgets.QGridLayout()

                # trans_widget = QtWidgets.QWidget()
                # trans_widget.setLayout(self.translator_grid_lay)
                # self.translators_tab_layout.addWidget(trans_widget)
                # self.translators_tab_layout.addStretch()

                trans_widget = QtWidgets.QWidget()
                trans_widget.setLayout(self.translator_grid_lay)
                trans_scroll = QtWidgets.QScrollArea()
                trans_scroll.setWidget(trans_widget)
                trans_scroll.setWidgetResizable(True)
                trans_scroll.setFrameShape(QtWidgets.QFrame.NoFrame)
                trans_scroll.setPalette(pal)
                self.translators_tab_layout.addWidget(trans_scroll)

                self.translator_grid_lay.addWidget(QtWidgets.QLabel('<b>%s</b>' % _("Language")), 0, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('<b>%s</b>' % _("Translator")), 0, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('<b>%s</b>' % _("E-mail")), 0, 2)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Brasilian - Portuguese"), 1, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Carlos Stein"), 1, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % " "),  1, 2)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "German"), 2, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Marius Stanciu (Google-Translation)"), 2, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % " "), 2, 2)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Romanian"), 3, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Marius Stanciu"), 3, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % " "), 3, 2)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Russian"), 4, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Andrey Kultyapov"), 4, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "<camellan@yandex.ru>"), 4, 2)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Spanish"), 5, 0)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % "Marius Stanciu (Google-Translation)"), 5, 1)
                self.translator_grid_lay.addWidget(QtWidgets.QLabel('%s' % " "), 5, 2)
                self.translator_grid_lay.setColumnStretch(0, 0)
                self.translators_tab_layout.addStretch()

                self.license_tab_layout.addWidget(license_label)
                self.license_tab_layout.addStretch()

                layout3.addStretch()
                layout3.addWidget(closebtn)

                closebtn.clicked.connect(self.accept)

        AboutDialog(self.ui).exec_()

    def on_file_savedefaults(self):
        """
        Callback for menu item File->Save Defaults. Saves application default options
        ``self.defaults`` to current_defaults.FlatConfig.

        :return: None
        """

        self.save_defaults()

    # def on_app_exit(self):
    #     self.report_usage("on_app_exit()")
    #
    #     if self.collection.get_list():
    #         msgbox = QtWidgets.QMessageBox()
    #         # msgbox.setText("<B>Save changes ...</B>")
    #         msgbox.setText("There are files/objects opened in FlatCAM. "
    #                        "\n"
    #                        "Do you want to Save the project?")
    #         msgbox.setWindowTitle("Save changes")
    #         msgbox.setWindowIcon(QtGui.QIcon('share/save_as.png'))
    #         msgbox.setStandardButtons(QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No |
    #                                   QtWidgets.QMessageBox.Cancel)
    #         msgbox.setDefaultButton(QtWidgets.QMessageBox.Yes)
    #
    #         response = msgbox.exec_()
    #
    #         if response == QtWidgets.QMessageBox.Yes:
    #             self.on_file_saveprojectas(thread=False)
    #         elif response == QtWidgets.QMessageBox.Cancel:
    #             return
    #         self.save_defaults()
    #     else:
    #         self.save_defaults()
    #     log.debug("Application defaults saved ... Exit event.")
    #     QtWidgets.qApp.quit()

    def save_defaults(self, silent=False, data_path=None):
        """
        Saves application default options
        ``self.defaults`` to current_defaults.FlatConfig file.
        Save the toolbars visibility status to the preferences file (current_defaults.FlatConfig) to be
        used at the next launch of the application.

        :param silent: whether to display a message in status bar or not; boolean
        :param data_path: the path where to save the preferences file (current_defaults.FlatConfig)
        When the application is portable it should be a mobile location.
        :return: None
        """
        self.report_usage("save_defaults")

        if data_path is None:
            data_path = self.data_path

        # Read options from file
        try:
            f = open(data_path + "/current_defaults.FlatConfig")
            defaults_file_content = f.read()
            f.close()
        except:
            e = sys.exc_info()[0]
            App.log.error("Could not load defaults file.")
            App.log.error(str(e))
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Could not load defaults file."))
            return

        try:
            defaults = json.loads(defaults_file_content)
        except:
            e = sys.exc_info()[0]
            App.log.error("Failed to parse defaults file.")
            App.log.error(str(e))
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to parse defaults file."))
            return

        # Update options
        self.defaults_read_form()
        defaults.update(self.defaults)
        self.propagate_defaults(silent=True)

        # Save the toolbar view
        tb_status = 0
        if self.ui.toolbarfile.isVisible():
            tb_status += 1

        if self.ui.toolbargeo.isVisible():
            tb_status += 2

        if self.ui.toolbarview.isVisible():
            tb_status += 4

        if self.ui.toolbartools.isVisible():
            tb_status += 8

        if self.ui.exc_edit_toolbar.isVisible():
            tb_status += 16

        if self.ui.geo_edit_toolbar.isVisible():
            tb_status += 32

        if self.ui.grb_edit_toolbar.isVisible():
            tb_status += 64

        if self.ui.snap_toolbar.isVisible():
            tb_status += 128

        if self.ui.toolbarshell.isVisible():
            tb_status += 256

        self.defaults["global_toolbar_view"] = tb_status

        # Save update options
        try:
            f = open(data_path + "/current_defaults.FlatConfig", "w")
            json.dump(defaults, f, default=to_dict, indent=2, sort_keys=True)
            f.close()
        except:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to write defaults to file."))
            return

        if not silent:
            self.inform.emit('[success] %s' %
                             _("Preferences saved."))

    def save_factory_defaults(self, silent=False, data_path=None):
        """
        Saves application factory default options
        ``self.defaults`` to factory_defaults.FlatConfig.
        It's a one time job done just after the first install.

        :param silent: whether to display a message in status bar or not; boolean
        :param data_path: the path where to save the default preferences file (factory_defaults.FlatConfig)
        When the application is portable it should be a mobile location.
        :return: None
        """
        self.report_usage("save_factory_defaults")

        if data_path is None:
            data_path = self.data_path

        # Read options from file
        try:
            f_f_def = open(data_path + "/factory_defaults.FlatConfig")
            factory_defaults_file_content = f_f_def.read()
            f_f_def.close()
        except:
            e = sys.exc_info()[0]
            App.log.error("Could not load factory defaults file.")
            App.log.error(str(e))
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Could not load factory defaults file."))
            return

        try:
            factory_defaults = json.loads(factory_defaults_file_content)
        except:
            e = sys.exc_info()[0]
            App.log.error("Failed to parse factory defaults file.")
            App.log.error(str(e))
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to parse factory defaults file."))
            return

        # Update options
        self.defaults_read_form()
        factory_defaults.update(self.defaults)
        self.propagate_defaults(silent=True)

        # Save update options
        try:
            f_f_def_s = open(data_path + "/factory_defaults.FlatConfig", "w")
            json.dump(factory_defaults, f_f_def_s, default=to_dict, indent=2, sort_keys=True)
            f_f_def_s.close()
        except:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to write factory defaults to file."))
            return

        if silent is False:
            self.inform.emit(_("Factory defaults saved."))

    def final_save(self):
        """
        Callback for doing a preferences save to file whenever the application is about to quit.
        If the project has changes, it will ask the user to save the project.

        :return: None
        """
        if self.save_in_progress:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Application is saving the project. Please wait ..."))
            return

        if self.should_we_save and self.collection.get_list():
            msgbox = QtWidgets.QMessageBox()
            msgbox.setText(_("There are files/objects modified in FlatCAM. "
                             "\n"
                             "Do you want to Save the project?"))
            msgbox.setWindowTitle(_("Save changes"))
            msgbox.setWindowIcon(QtGui.QIcon('share/save_as.png'))
            bt_yes = msgbox.addButton(_('Yes'), QtWidgets.QMessageBox.YesRole)
            bt_no = msgbox.addButton(_('No'), QtWidgets.QMessageBox.NoRole)
            bt_cancel = msgbox.addButton(_('Cancel'), QtWidgets.QMessageBox.RejectRole)

            msgbox.setDefaultButton(bt_yes)
            msgbox.exec_()
            response = msgbox.clickedButton()

            if response == bt_yes:
                self.on_file_saveprojectas(use_thread=True, quit_action=True)
            elif response == bt_no:
                self.quit_application()
            elif response == bt_cancel:
                return
        else:
            self.quit_application()

    def quit_application(self):
        """
        Called (as a pyslot or not) when the application is quit.

        :return: None
        """
        self.save_defaults()
        log.debug("App.final_save() --> App Defaults saved.")

        # save toolbar state to file
        settings = QSettings("Open Source", "FlatCAM")
        settings.setValue('saved_gui_state', self.ui.saveState())
        settings.setValue('maximized_gui', self.ui.isMaximized())
        settings.setValue('language', self.ui.general_defaults_form.general_app_group.language_cb.get_value())
        settings.setValue('notebook_font_size',
                          self.ui.general_defaults_form.general_gui_set_group.notebook_font_size_spinner.get_value())
        settings.setValue('axis_font_size',
                          self.ui.general_defaults_form.general_gui_set_group.axis_font_size_spinner.get_value())

        settings.setValue('toolbar_lock', self.ui.lock_action.isChecked())

        # This will write the setting to the platform specific storage.
        del settings
        log.debug("App.final_save() --> App UI state saved.")
        QtWidgets.qApp.quit()

    def on_portable_checked(self, state):
        """
        Callback called when the checkbox in Preferences GUI is checked.
        It will set the application as portable by creating the preferences and recent files in the
        'config' folder found in the FlatCAM installation folder.

        :param state: boolean, the state of the checkbox when clicked/checked
        :return:
        """

        line_no = 0
        data = None

        if sys.platform != 'win32':
            # this won't work in Linux or MacOS
            return

        # test if the app was frozen and choose the path for the configuration file
        if getattr(sys, "frozen", False) is True:
            current_data_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__))) + '\\config'
        else:
            current_data_path = os.path.dirname(os.path.realpath(__file__)) + '\\config'

        config_file = current_data_path  + '\\configuration.txt'
        try:
            with open(config_file, 'r') as f:
                try:
                    data = f.readlines()
                except Exception as e:
                    log.debug('App.__init__() -->%s' % str(e))
                    return
        except FileNotFoundError:
            pass

        for line in data:
            line = line.strip('\n')
            param = str(line).rpartition('=')
            if param[0] == 'portable':
                break
            line_no += 1

        if state:
            data[line_no] = 'portable=True\n'
            # create the new defauults files
            # create current_defaults.FlatConfig file if there is none
            try:
                f = open(current_data_path + '/current_defaults.FlatConfig')
                f.close()
            except IOError:
                App.log.debug('Creating empty current_defaults.FlatConfig')
                f = open(current_data_path + '/current_defaults.FlatConfig', 'w')
                json.dump({}, f)
                f.close()

            # create factory_defaults.FlatConfig file if there is none
            try:
                f = open(current_data_path + '/factory_defaults.FlatConfig')
                f.close()
            except IOError:
                App.log.debug('Creating empty factory_defaults.FlatConfig')
                f = open(current_data_path + '/factory_defaults.FlatConfig', 'w')
                json.dump({}, f)
                f.close()

            try:
                f = open(current_data_path + '/recent.json')
                f.close()
            except IOError:
                App.log.debug('Creating empty recent.json')
                f = open(current_data_path + '/recent.json', 'w')
                json.dump([], f)
                f.close()

            try:
                fp = open(current_data_path + '/recent_projects.json')
                fp.close()
            except IOError:
                App.log.debug('Creating empty recent_projects.json')
                fp = open(current_data_path + '/recent_projects.json', 'w')
                json.dump([], fp)
                fp.close()

            # save the current defaults to the new defaults file
            self.save_defaults(silent=True, data_path=current_data_path)
            self.save_factory_defaults(silent=True, data_path=current_data_path)

        else:
            data[line_no] = 'portable=False\n'

        with open(config_file, 'w') as f:
            f.writelines(data)

    def on_toggle_shell(self):
        """
        Toggle shell: if is visible close it, if it is closed then open it
        :return:
        """
        self.report_usage("on_toggle_shell()")

        if self.ui.shell_dock.isVisible():
            self.ui.shell_dock.hide()
        else:
            self.ui.shell_dock.show()

    def on_register_files(self, obj_type=None):
        """
        Called whenever there is a need to register file extensions with FlatCAM.
        Works only in Windows and should be called only when FlatCAM is run in Windows.

        :param obj_type: the type of object to be register for.
        Can be: 'gerber', 'excellon' or 'gcode'. 'geometry' is not used for the moment.

        :return: None
        """
        log.debug("Manufacturing files extensions are registered with FlatCAM.")

        new_reg_path = 'Software\\Classes\\'
        # find if the current user is admin
        try:
            is_admin = os.getuid() == 0
        except AttributeError:
            is_admin = ctypes.windll.shell32.IsUserAnAdmin() == 1

        if is_admin is True:
            root_path = winreg.HKEY_CLASSES_ROOT
        else:
            root_path = winreg.HKEY_CURRENT_USER

        # create the keys
        def set_reg(name, root_path, new_reg_path, value):
            try:
                winreg.CreateKey(root_path, new_reg_path)
                with winreg.OpenKey(root_path, new_reg_path, 0, winreg.KEY_WRITE) as registry_key:
                    winreg.SetValueEx(registry_key, name, 0, winreg.REG_SZ, value)
                return True
            except WindowsError:
                return False

        # delete key in registry
        def delete_reg(root_path, reg_path, key_to_del):
            key_to_del_path = reg_path + key_to_del
            try:
                winreg.DeleteKey(root_path, key_to_del_path)
                return True
            except WindowsError:
                return False

        if obj_type is None or obj_type == 'excellon':
            exc_list = self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.get_value().replace(' ', '').split(',')
            exc_list = [x for x in exc_list if x != '']

            # register all keys in the Preferences window
            for ext in exc_list:
                new_k = new_reg_path + '.%s' % ext
                set_reg('', root_path=root_path, new_reg_path=new_k, value='FlatCAM')

            # and unregister those that are no longer in the Preferences windows but are in the file
            for ext in self.defaults["fa_excellon"].replace(' ', '').split(','):
                if ext not in exc_list:
                    delete_reg(root_path=root_path, reg_path=new_reg_path, key_to_del='.%s' % ext)

            # now write the updated extensions to the self.defaults
            # new_ext = ''
            # for ext in exc_list:
            #     new_ext = new_ext + ext + ', '
            # self.defaults["fa_excellon"] = new_ext
            self.inform.emit('[success] %s' % _("Selected Excellon file extensions registered with FlatCAM."))

        if obj_type is None or obj_type == 'gcode':
            gco_list = self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.get_value().replace(' ', '').split(',')
            gco_list = [x for x in gco_list if x != '']

            # register all keys in the Preferences window
            for ext in gco_list:
                new_k = new_reg_path + '.%s' % ext
                set_reg('', root_path=root_path, new_reg_path=new_k, value='FlatCAM')

            # and unregister those that are no longer in the Preferences windows but are in the file
            for ext in self.defaults["fa_gcode"].replace(' ', '').split(','):
                if ext not in gco_list:
                    delete_reg(root_path=root_path, reg_path=new_reg_path, key_to_del='.%s' % ext)

            # now write the updated extensions to the self.defaults
            # new_ext = ''
            # for ext in gco_list:
            #     new_ext = new_ext + ext + ', '
            # self.defaults["fa_gcode"] = new_ext
            self.inform.emit('[success] %s' %
                             _("Selected GCode file extensions registered with FlatCAM."))

        if obj_type is None or obj_type == 'gerber':
            grb_list = self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.get_value().replace(' ', '').split(',')
            grb_list = [x for x in grb_list if x != '']

            # register all keys in the Preferences window
            for ext in grb_list:
                new_k = new_reg_path + '.%s' % ext
                set_reg('', root_path=root_path, new_reg_path=new_k, value='FlatCAM')

            # and unregister those that are no longer in the Preferences windows but are in the file
            for ext in self.defaults["fa_gerber"].replace(' ', '').split(','):
                if ext not in grb_list:
                    delete_reg(root_path=root_path, reg_path=new_reg_path, key_to_del='.%s' % ext)

            # now write the updated extensions to the self.defaults
            # new_ext = ''
            # for ext in grb_list:
            #     new_ext = new_ext + ext + ', '
            # self.defaults["fa_gerber"] = new_ext
            self.inform.emit('[success] %s' %
                             _("Selected Gerber file extensions registered with FlatCAM."))

    def add_extension(self, ext_type):
        if ext_type == 'excellon':
            new_ext = self.ui.fa_defaults_form.fa_excellon_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.get_value().replace(' ', '').split(',')
            if new_ext in old_val:
                return
            old_val.append(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.set_value(', '.join(old_val))
        if ext_type == 'gcode':
            new_ext = self.ui.fa_defaults_form.fa_gcode_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.get_value().replace(' ', '').split(',')
            if new_ext in old_val:
                return
            old_val.append(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.set_value(', '.join(old_val))
        if ext_type == 'gerber':
            new_ext = self.ui.fa_defaults_form.fa_gerber_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.get_value().replace(' ', '').split(',')
            if new_ext in old_val:
                return
            old_val.append(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.set_value(', '.join(old_val))

    def del_extension(self, ext_type):
        if ext_type == 'excellon':
            new_ext = self.ui.fa_defaults_form.fa_excellon_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.get_value().replace(' ', '').split(',')
            if new_ext not in old_val:
                return
            old_val.remove(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.set_value(', '.join(old_val))
        if ext_type == 'gcode':
            new_ext = self.ui.fa_defaults_form.fa_gcode_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.get_value().replace(' ', '').split(',')
            if new_ext not in old_val:
                return
            old_val.remove(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.set_value(', '.join(old_val))
        if ext_type == 'gerber':
            new_ext = self.ui.fa_defaults_form.fa_gerber_group.ext_entry.get_value()
            if new_ext == '':
                return

            old_val = self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.get_value().replace(' ', '').split(',')
            if new_ext not in old_val:
                return
            old_val.remove(new_ext)
            old_val.sort()
            self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.set_value(', '.join(old_val))

    def restore_extensions(self, ext_type):
        if ext_type == 'excellon':
            # don't add 'txt' to the associations (too many files are .txt and not Excellon) but keep it in the list
            # for the ability to open Excellon files with .txt extension
            new_exc_list = deepcopy(self.exc_list)

            try:
                new_exc_list.remove('txt')
            except ValueError:
                pass
            self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.set_value(', '.join(new_exc_list))
        if ext_type == 'gcode':
            self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.set_value(', '.join(self.gcode_list))
        if ext_type == 'gerber':
            self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.set_value(', '.join(self.grb_list))

    def delete_all_extensions(self, ext_type):
        if ext_type == 'excellon':
            self.ui.fa_defaults_form.fa_excellon_group.exc_list_text.set_value('')
        if ext_type == 'gcode':
            self.ui.fa_defaults_form.fa_gcode_group.gco_list_text.set_value('')
        if ext_type == 'gerber':
            self.ui.fa_defaults_form.fa_gerber_group.grb_list_text.set_value('')

    def on_edit_join(self, name=None):
        """
        Callback for Edit->Join. Joins the selected geometry objects into
        a new one.

        :return: None
        """
        self.report_usage("on_edit_join()")

        obj_name_single = str(name) if name else "Combo_SingleGeo"
        obj_name_multi = str(name) if name else "Combo_MultiGeo"

        tooldias = []
        geo_type_list = set()

        objs = self.collection.get_selected()

        if len(objs) < 2:
            self.inform.emit('[ERROR_NOTCL] %s: %d' %
                             (_("At least two objects are required for join. Objects currently selected"), len(objs)))
            return 'fail'

        for obj in objs:
            geo_type_list.add(obj.multigeo)

        # if len(geo_type_list) == 1 means that all list elements are the same
        if len(geo_type_list) != 1:
            self.inform.emit('[ERROR] %s' %
                             _("Failed join. The Geometry objects are of different types.\n"
                               "At least one is MultiGeo type and the other is SingleGeo type. A possibility is to "
                               "convert from one to another and retry joining \n"
                               "but in the case of converting from MultiGeo to SingleGeo, informations may be lost and "
                               "the result may not be what was expected. \n"
                               "Check the generated GCODE."))
            return

        # if at least one True object is in the list then due of the previous check, all list elements are True objects
        if True in geo_type_list:
            def initialize(obj, app):
                FlatCAMGeometry.merge(self, geo_list=objs, geo_final=obj, multigeo=True)

                # rename all the ['name] key in obj.tools[tooluid]['data'] to the obj_name_multi
                for v in obj.tools.values():
                    v['data']['name'] = obj_name_multi
            self.new_object("geometry", obj_name_multi, initialize)
        else:
            def initialize(obj, app):
                FlatCAMGeometry.merge(self, geo_list=objs, geo_final=obj, multigeo=False)

                # rename all the ['name] key in obj.tools[tooluid]['data'] to the obj_name_multi
                for v in obj.tools.values():
                    v['data']['name'] = obj_name_single
            self.new_object("geometry", obj_name_single, initialize)

        self.should_we_save = True

    def on_edit_join_exc(self):
        """
        Callback for Edit->Join Excellon. Joins the selected Excellon objects into
        a new Excellon.

        :return: None
        """
        self.report_usage("on_edit_join_exc()")

        objs = self.collection.get_selected()

        for obj in objs:
            if not isinstance(obj, FlatCAMExcellon):
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Failed. Excellon joining works only on Excellon objects."))
                return

        if len(objs) < 2:
            self.inform.emit('[ERROR_NOTCL] %s: %d' %
                             (_("At least two objects are required for join. Objects currently selected"), len(objs)))
            return 'fail'

        def initialize(obj, app):
            FlatCAMExcellon.merge(self, exc_list=objs, exc_final=obj)

        self.new_object("excellon", 'Combo_Excellon', initialize)
        self.should_we_save = True

    def on_edit_join_grb(self):
        """
        Callback for Edit->Join Gerber. Joins the selected Gerber objects into
        a new Gerber object.

        :return: None
        """
        self.report_usage("on_edit_join_grb()")

        objs = self.collection.get_selected()

        for obj in objs:
            if not isinstance(obj, FlatCAMGerber):
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Failed. Gerber joining works only on Gerber objects."))
                return

        if len(objs) < 2:
            self.inform.emit('[ERROR_NOTCL] %s: %d' %
                             (_("At least two objects are required for join. Objects currently selected"), len(objs)))
            return 'fail'

        def initialize(obj, app):
            FlatCAMGerber.merge(self, grb_list=objs, grb_final=obj)

        self.new_object("gerber", 'Combo_Gerber', initialize)
        self.should_we_save = True

    def on_convert_singlegeo_to_multigeo(self):
        """
        Called for converting a Geometry object from single-geo to multi-geo.
        Single-geo Geometry objects store their geometry data into self.solid_geometry.
        Multi-geo Geometry objects store their geometry data into the self.tools dictionary, each key (a tool actually)
        having as a value another dictionary. This value dictionary has one of it's keys 'solid_geometry' which holds
        the solid-geometry of that tool.

        :return: None
        """
        self.report_usage("on_convert_singlegeo_to_multigeo()")

        obj = self.collection.get_active()

        if obj is None:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Select a Geometry Object and try again."))
            return

        if not isinstance(obj, FlatCAMGeometry):
            self.inform.emit('[ERROR_NOTCL] %s: %s' %
                             (_("Expected a FlatCAMGeometry, got"), type(obj)))
            return

        obj.multigeo = True
        for tooluid, dict_value in obj.tools.items():
            dict_value['solid_geometry'] = deepcopy(obj.solid_geometry)
        if not isinstance(obj.solid_geometry, list):
            obj.solid_geometry = [obj.solid_geometry]
        obj.solid_geometry[:] = []
        obj.plot()

        self.should_we_save = True

        self.inform.emit('[success] %s' %
                         _("A Geometry object was converted to MultiGeo type."))

    def on_convert_multigeo_to_singlegeo(self):
        """
        Called for converting a Geometry object from multi-geo to single-geo.
        Single-geo Geometry objects store their geometry data into self.solid_geometry.
        Multi-geo Geometry objects store their geometry data into the self.tools dictionary, each key (a tool actually)
        having as a value another dictionary. This value dictionary has one of it's keys 'solid_geometry' which holds
        the solid-geometry of that tool.

        :return: None
        """
        self.report_usage("on_convert_multigeo_to_singlegeo()")

        obj = self.collection.get_active()

        if obj is None:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Select a Geometry Object and try again."))
            return

        if not isinstance(obj, FlatCAMGeometry):
            self.inform.emit('[ERROR_NOTCL] %s: %s' %
                             (_("Expected a FlatCAMGeometry, got"), type(obj)))
            return

        obj.multigeo = False
        total_solid_geometry = []
        for tooluid, dict_value in obj.tools.items():
            total_solid_geometry += deepcopy(dict_value['solid_geometry'])
            # clear the original geometry
            dict_value['solid_geometry'][:] = []
        obj.solid_geometry = deepcopy(total_solid_geometry)
        obj.plot()

        self.should_we_save = True

        self.inform.emit('[success] %s' %
                         _("A Geometry object was converted to SingleGeo type."))

    def on_options_dict_change(self, field):
        """
        Called whenever a key changed in the self.options dictionary. This dict was used to store the preferences of the
        current project. This feature is no longer used.

        :param field:
        :return:
        """
        self.options_write_form_field(field)

        if field == "units":
            self.set_screen_units(self.options['units'])

    def on_defaults_dict_change(self, field):
        """
        Called whenever a key changed in the self.defaults dictionary. It will set the required GUI element in the
        Edit -> Preferences tab window.

        :param field: the key of the self.defaults dictionary that was changed.
        :return: None
        """
        self.defaults_write_form_field(field)

        if field == "units":
            self.set_screen_units(self.defaults['units'])

    def set_screen_units(self, units):
        """
        Set the FlatCAM units on the status bar.

        :param units: the new measuring units to be displayed in FlatCAM's status bar.
        :return: None
        """
        self.ui.units_label.setText("[" + units.lower() + "]")

    def on_toggle_units(self, no_pref=False):
        """
        Callback for the Units radio-button change in the Preferences tab.
        Changes the application's default units adn for the project too.
        If changing the project's units, the change propagates to all of
        the objects in the project.

        :return: None
        """

        self.report_usage("on_toggle_units")

        if self.toggle_units_ignore:
            return

        new_units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()

        # If option is the same, then ignore
        if new_units == self.defaults["units"].upper():
            self.log.debug("on_toggle_units(): Same as defaults, so ignoring.")
            return

        # Options to scale
        dimensions = ['gerber_isotooldia', 'gerber_noncoppermargin', 'gerber_bboxmargin',

                      'excellon_drillz',  'excellon_travelz', "excellon_toolchangexy",
                      'excellon_feedrate', 'excellon_feedrate_rapid', 'excellon_toolchangez',
                      'excellon_tooldia', 'excellon_slot_tooldia', 'excellon_endz', "excellon_feedrate_probe",
                      "excellon_z_pdepth",

                      'geometry_cutz',  "geometry_depthperpass", 'geometry_travelz', 'geometry_feedrate',
                      'geometry_feedrate_rapid', "geometry_toolchangez", "geometry_feedrate_z",
                      "geometry_toolchangexy", 'geometry_cnctooldia', 'geometry_endz', "geometry_z_pdepth",
                      "geometry_feedrate_probe",

                      'cncjob_tooldia',

                      'tools_paintmargin', 'tools_painttooldia', 'tools_paintoverlap',
                      "tools_ncctools", "tools_nccoverlap", "tools_nccmargin", "tools_ncccutz", "tools_ncctipdia"
                      "tools_2sided_drilldia", "tools_film_boundary",
                      "tools_cutouttooldia", 'tools_cutoutmargin', 'tools_cutoutgapsize',
                      "tools_panelize_constrainx", "tools_panelize_constrainy",
                      "tools_calc_vshape_tip_dia", "tools_calc_vshape_cut_z",
                      "tools_transform_skew_x", "tools_transform_skew_y", "tools_transform_offset_x",
                      "tools_transform_offset_y",

                      "tools_solderpaste_tools", "tools_solderpaste_new", "tools_solderpaste_z_start",
                      "tools_solderpaste_z_dispense", "tools_solderpaste_z_stop", "tools_solderpaste_z_travel",
                      "tools_solderpaste_z_toolchange", "tools_solderpaste_xy_toolchange", "tools_solderpaste_frxy",
                      "tools_solderpaste_frz", "tools_solderpaste_frz_dispense",

                      'global_gridx', 'global_gridy', 'global_snap_max']

        def scale_options(sfactor):
            for dim in dimensions:
                if dim == 'excellon_toolchangexy':
                    coordinates = self.defaults["excellon_toolchangexy"].split(",")
                    coords_xy = [float(eval(a)) for a in coordinates if a != '']
                    coords_xy[0] *= sfactor
                    coords_xy[1] *= sfactor
                    self.options['excellon_toolchangexy'] = "%f, %f" % (coords_xy[0], coords_xy[1])
                elif dim == 'geometry_toolchangexy':
                    coordinates = self.defaults["geometry_toolchangexy"].split(",")
                    coords_xy = [float(eval(a)) for a in coordinates if a != '']
                    coords_xy[0] *= sfactor
                    coords_xy[1] *= sfactor
                    self.options['geometry_toolchangexy'] = "%f, %f" % (coords_xy[0], coords_xy[1])
                elif dim == 'geometry_cnctooldia':
                    tools_diameters = []
                    try:
                        tools_string = self.defaults["geometry_cnctooldia"].split(",")
                        tools_diameters = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.options['geometry_cnctooldia'] = ''
                    for t in range(len(tools_diameters)):
                        tools_diameters[t] *= sfactor
                        self.options['geometry_cnctooldia'] += "%f," % tools_diameters[t]
                elif dim == 'tools_ncctools':
                    ncctools = []
                    try:
                        tools_string = self.defaults["tools_ncctools"].split(",")
                        ncctools = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.options['tools_ncctools'] = ''
                    for t in range(len(ncctools)):
                        ncctools[t] *= sfactor
                        self.options['tools_ncctools'] += "%f," % ncctools[t]
                elif dim == 'tools_solderpaste_tools':
                    sptools = []
                    try:
                        tools_string = self.defaults["tools_solderpaste_tools"].split(",")
                        sptools = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.options['tools_solderpaste_tools'] = ""
                    for t in range(len(sptools)):
                        sptools[t] *= sfactor
                        self.options['tools_solderpaste_tools'] += "%f," % sptools[t]
                elif dim == 'tools_solderpaste_xy_toolchange':
                    coordinates = self.defaults["tools_solderpaste_xy_toolchange"].split(",")
                    sp_coords = [float(eval(a)) for a in coordinates if a != '']
                    sp_coords[0] *= sfactor
                    sp_coords[1] *= sfactor
                    self.options['tools_solderpaste_xy_toolchange'] = "%f, %f" % (sp_coords[0], sp_coords[1])
                elif dim == 'global_gridx' or dim == 'global_gridy':
                    if new_units == 'IN':
                        val = 0.1
                        try:
                            val = float(self.defaults[dim]) * sfactor
                        except Exception as e:
                            log.debug('App.on_toggle_units().scale_defaults() --> %s' % str(e))

                        self.options[dim] = float('%.6f' % val)
                    else:
                        val = 0.1
                        try:
                            val = float(self.defaults[dim]) * sfactor
                        except Exception as e:
                            log.debug('App.on_toggle_units().scale_defaults() --> %s' % str(e))

                        self.options[dim] = float('%.4f' % val)
                else:
                    val = 0.1
                    try:
                        val = float(self.options[dim]) * sfactor
                    except Exception as e:
                        log.debug('App.on_toggle_units().scale_options() --> %s' % str(e))

                    self.options[dim] = val

        def scale_defaults(sfactor):
            for dim in dimensions:
                if dim == 'excellon_toolchangexy':
                    coordinates = self.defaults["excellon_toolchangexy"].split(",")
                    coords_xy = [float(eval(a)) for a in coordinates if a != '']
                    coords_xy[0] *= sfactor
                    coords_xy[1] *= sfactor
                    self.defaults['excellon_toolchangexy'] = "%.4f, %.4f" % (coords_xy[0], coords_xy[1])
                elif dim == 'geometry_toolchangexy':
                    coordinates = self.defaults["geometry_toolchangexy"].split(",")
                    coords_xy = [float(eval(a)) for a in coordinates if a != '']
                    coords_xy[0] *= sfactor
                    coords_xy[1] *= sfactor
                    self.defaults['geometry_toolchangexy'] = "%.4f, %.4f" % (coords_xy[0], coords_xy[1])
                elif dim == 'geometry_cnctooldia':
                    tools_diameters = []
                    try:
                        tools_string = self.defaults["geometry_cnctooldia"].split(",")
                        tools_diameters = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.defaults['geometry_cnctooldia'] = ''
                    for t in range(len(tools_diameters)):
                        tools_diameters[t] *= sfactor
                        self.defaults['geometry_cnctooldia'] += "%.4f," % tools_diameters[t]
                elif dim == 'tools_ncctools':
                    ncctools = []
                    try:
                        tools_string = self.defaults["tools_ncctools"].split(",")
                        ncctools = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.defaults['tools_ncctools'] = ''
                    for t in range(len(ncctools)):
                        ncctools[t] *= sfactor
                        self.defaults['tools_ncctools'] += "%.4f," % ncctools[t]
                elif dim == 'tools_solderpaste_tools':
                    sptools = []
                    try:
                        tools_string = self.defaults["tools_solderpaste_tools"].split(",")
                        sptools = [eval(a) for a in tools_string if a != '']
                    except Exception as e:
                        log.debug("App.on_toggle_units().scale_options() --> %s" % str(e))

                    self.defaults['tools_solderpaste_tools'] = ""
                    for t in range(len(sptools)):
                        sptools[t] *= sfactor
                        self.defaults['tools_solderpaste_tools'] += "%.4f," % sptools[t]
                elif dim == 'tools_solderpaste_xy_toolchange':
                    coordinates = self.defaults["tools_solderpaste_xy_toolchange"].split(",")
                    sp_coords = [float(eval(a)) for a in coordinates if a != '']
                    sp_coords[0] *= sfactor
                    sp_coords[1] *= sfactor
                    self.defaults['tools_solderpaste_xy_toolchange'] = "%.4f, %.4f" % (sp_coords[0], sp_coords[1])
                elif dim == 'global_gridx' or dim == 'global_gridy':
                    if new_units == 'IN':
                        val = 0.1
                        try:
                            val = float(self.defaults[dim]) * sfactor
                        except Exception as e:
                            log.debug('App.on_toggle_units().scale_defaults() --> %s' % str(e))

                        self.defaults[dim] = float('%.6f' % val)
                    else:
                        val = 0.1
                        try:
                            val = float(self.defaults[dim]) * sfactor
                        except Exception as e:
                            log.debug('App.on_toggle_units().scale_defaults() --> %s' % str(e))

                        self.defaults[dim] = float('%.4f' % val)
                else:
                    val = 0.1
                    try:
                        val = float(self.defaults[dim]) * sfactor
                    except Exception as e:
                        log.debug('App.on_toggle_units().scale_defaults() --> %s' % str(e))

                    self.defaults[dim] = val

        # The scaling factor depending on choice of units.
        factor = 1/25.4
        if new_units == 'MM':
            factor = 25.4

        # Changing project units. Warn user.
        msgbox = QtWidgets.QMessageBox()
        msgbox.setWindowTitle(_("Toggle Units"))
        msgbox.setWindowIcon(QtGui.QIcon('share/toggle_units32.png'))
        msgbox.setText("<B>%s</B>" % _("Change project units ..."))
        msgbox.setInformativeText(_("Changing the units of the project causes all geometrical "
                                    "properties of all objects to be scaled accordingly.\nContinue?"))
        bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
        bt_cancel = msgbox.addButton(_('Cancel'), QtWidgets.QMessageBox.RejectRole)

        msgbox.setDefaultButton(bt_ok)
        msgbox.exec_()
        response = msgbox.clickedButton()

        if response == bt_ok:
            if no_pref is False:
                self.options_read_form()
                scale_options(factor)
                self.options_write_form()

                self.defaults_read_form()
                scale_defaults(factor)
                self.defaults_write_form(fl_units=new_units)

                # save the defaults to file, some may assume that the conversion is enough and it's not
                self.on_save_button()

            self.should_we_save = True

            # change this only if the workspace is active
            if self.defaults['global_workspace'] is True:
                self.plotcanvas.draw_workspace()

            # adjust the grid values on the main toolbar
            dec = 6 if new_units == 'IN'else 4
            val_x = float(self.ui.grid_gap_x_entry.get_value()) * factor
            self.ui.grid_gap_x_entry.set_value(val_x, decimals=dec)
            if not self.ui.grid_gap_link_cb.isChecked():
                val_y = float(self.ui.grid_gap_y_entry.get_value()) * factor
                self.ui.grid_gap_y_entry.set_value(val_y, decimals=dec)

            for obj in self.collection.get_list():
                obj.convert_units(new_units)

                # make that the properties stored in the object are also updated
                self.object_changed.emit(obj)
                obj.build_ui()

            current = self.collection.get_active()
            if current is not None:
                # the transfer of converted values to the UI form for Geometry is done local in the FlatCAMObj.py
                if not isinstance(current, FlatCAMGeometry):
                    current.to_form()

            self.plot_all()
            self.inform.emit('[success] %s: %s' %
                             (_("Converted units to"), new_units))
            # self.ui.units_label.setText("[" + self.options["units"] + "]")
            self.set_screen_units(new_units)
        else:
            # Undo toggling
            self.toggle_units_ignore = True
            if self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper() == 'MM':
                self.ui.general_defaults_form.general_app_group.units_radio.set_value('IN')
            else:
                self.ui.general_defaults_form.general_app_group.units_radio.set_value('MM')
            self.toggle_units_ignore = False
            self.inform.emit('[WARNING_NOTCL]%s' %
                             _(" Units conversion cancelled."))

        self.options_read_form()
        self.defaults_read_form()

    def on_toggle_units_click(self):
        try:
            self.ui.general_defaults_form.general_app_group.units_radio.activated_custom.disconnect()
        except (TypeError, AttributeError):
            pass

        if self.defaults["units"] == 'MM':
            self.ui.general_defaults_form.general_app_group.units_radio.set_value("IN")
        else:
            self.ui.general_defaults_form.general_app_group.units_radio.set_value("MM")
        self.on_toggle_units(no_pref=True)

        self.ui.general_defaults_form.general_app_group.units_radio.activated_custom.connect(
            lambda: self.on_toggle_units(no_pref=False))

    def on_fullscreen(self):
        self.report_usage("on_fullscreen()")

        if self.toggle_fscreen is False:
            if sys.platform == 'win32':
                self.ui.showFullScreen()
            for tb in self.ui.findChildren(QtWidgets.QToolBar):
                tb.setVisible(False)
            self.ui.splitter_left.setVisible(False)
            self.toggle_fscreen = True
        else:
            if sys.platform == 'win32':
                self.ui.showNormal()
            self.restore_toolbar_view()
            self.ui.splitter_left.setVisible(True)
            self.toggle_fscreen = False

    def on_toggle_plotarea(self):
        self.report_usage("on_toggle_plotarea()")

        try:
            name = self.ui.plot_tab_area.widget(0).objectName()
        except AttributeError:
            self.ui.plot_tab_area.addTab(self.ui.plot_tab, "Plot Area")
            # remove the close button from the Plot Area tab (first tab index = 0) as this one will always be ON
            self.ui.plot_tab_area.protectTab(0)
            return

        if name != 'plotarea':
            self.ui.plot_tab_area.insertTab(0, self.ui.plot_tab, "Plot Area")
            # remove the close button from the Plot Area tab (first tab index = 0) as this one will always be ON
            self.ui.plot_tab_area.protectTab(0)
        else:
            self.ui.plot_tab_area.closeTab(0)

    def on_toggle_notebook(self):
        if self.ui.splitter.sizes()[0] == 0:
            self.ui.splitter.setSizes([1, 1])
        else:
            self.ui.splitter.setSizes([0, 1])

    def on_toggle_axis(self):
        self.report_usage("on_toggle_axis()")

        if self.toggle_axis is False:
            self.plotcanvas.v_line.set_data(color=(0.70, 0.3, 0.3, 1.0))
            self.plotcanvas.h_line.set_data(color=(0.70, 0.3, 0.3, 1.0))
            self.plotcanvas.redraw()
            self.toggle_axis = True
        else:
            self.plotcanvas.v_line.set_data(color=(0.0, 0.0, 0.0, 0.0))

            self.plotcanvas.h_line.set_data(color=(0.0, 0.0, 0.0, 0.0))
            self.plotcanvas.redraw()
            self.toggle_axis = False

    def on_toggle_grid(self):
        self.report_usage("on_toggle_grid()")

        self.ui.grid_snap_btn.trigger()

    def on_options_combo_change(self, sel):
        """
        Called when the combo box to choose between application defaults and
        project option changes value. The corresponding variables are
        copied to the UI.

        :param sel: The option index that was chosen.
        :return: None
        """

        # combo_sel = self.ui.notebook.combo_options.get_active()
        App.log.debug("Options --> %s" % sel)

        # form = [self.defaults_form, self.options_form][sel]
        # self.ui.notebook.options_contents.pack_start(form, False, False, 1)

        if sel == 0:
            self.gen_form = self.ui.general_defaults_form
            self.ger_form = self.ui.gerber_defaults_form
            self.exc_form = self.ui.excellon_defaults_form
            self.geo_form = self.ui.geometry_defaults_form
            self.cnc_form = self.ui.cncjob_defaults_form
            self.tools_form = self.ui.tools_defaults_form
            self.fa_form = self.ui.fa_defaults_form
        elif sel == 1:
            self.gen_form = self.ui.general_options_form
            self.ger_form = self.ui.gerber_options_form
            self.exc_form = self.ui.excellon_options_form
            self.geo_form = self.ui.geometry_options_form
            self.cnc_form = self.ui.cncjob_options_form
            self.tools_form = self.ui.tools_options_form
            self.fa_form = self.ui.fa_options_form
        else:
            return

        try:
            self.ui.general_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.general_scroll_area.setWidget(self.gen_form)
        self.gen_form.show()

        try:
            self.ui.gerber_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.gerber_scroll_area.setWidget(self.ger_form)
        self.ger_form.show()

        try:
            self.ui.excellon_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.excellon_scroll_area.setWidget(self.exc_form)
        self.exc_form.show()

        try:
            self.ui.geometry_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.geometry_scroll_area.setWidget(self.geo_form)
        self.geo_form.show()

        try:
            self.ui.cncjob_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.cncjob_scroll_area.setWidget(self.cnc_form)
        self.cnc_form.show()

        try:
            self.ui.tools_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.tools_scroll_area.setWidget(self.tools_form)
        self.tools_form.show()

        try:
            self.ui.fa_scroll_area.takeWidget()
        except:
            self.log.debug("Nothing to remove")
        self.ui.fa_scroll_area.setWidget(self.fa_form)
        self.fa_form.show()

        self.log.debug("Finished GUI form initialization.")

        # self.options2form()

    def on_excellon_defaults_button(self):
        self.defaults_form_fields["excellon_format_lower_in"].set_value('4')
        self.defaults_form_fields["excellon_format_upper_in"].set_value('2')
        self.defaults_form_fields["excellon_format_lower_mm"].set_value('3')
        self.defaults_form_fields["excellon_format_upper_mm"].set_value('3')
        self.defaults_form_fields["excellon_zeros"].set_value('L')
        self.defaults_form_fields["excellon_units"].set_value('INCH')
        log.debug("Excellon app defaults loaded ...")

    def on_excellon_options_button(self):

        self.options_form_fields["excellon_format_lower_in"].set_value('4')
        self.options_form_fields["excellon_format_upper_in"].set_value('2')
        self.options_form_fields["excellon_format_lower_mm"].set_value('3')
        self.options_form_fields["excellon_format_upper_mm"].set_value('3')
        self.options_form_fields["excellon_zeros"].set_value('L')
        self.options_form_fields["excellon_units"].set_value('INCH')
        log.debug("Excellon options defaults loaded ...")

    def on_update_exc_export(self, state):
        """
        This is handling the update of Excellon Export parameters based on the ones in the Excellon General but only
        if the update_excellon_cb checkbox is checked

        :param state: state of the checkbox whose signals is tied to his slot
        :return:
        """
        if state:
            # first try to disconnect
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_in_entry.textChanged.\
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_in_entry.textChanged.\
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_mm_entry.textChanged.\
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_mm_entry.textChanged.\
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass

            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_zeros_radio.activated_custom.\
                    disconnect(self.on_excellon_zeros_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio.activated_custom.\
                    disconnect(self.on_excellon_zeros_changed)
            except TypeError:
                pass

            # the connect them
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_in_entry.textChanged.connect(
                self.on_excellon_format_changed)
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_in_entry.textChanged.connect(
                self.on_excellon_format_changed)
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_mm_entry.textChanged.connect(
                self.on_excellon_format_changed)
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_mm_entry.textChanged.connect(
                self.on_excellon_format_changed)
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_zeros_radio.activated_custom.connect(
                self.on_excellon_zeros_changed)
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio.activated_custom.connect(
                self.on_excellon_units_changed)
        else:
            # disconnect the signals
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_in_entry.textChanged. \
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_in_entry.textChanged. \
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_mm_entry.textChanged. \
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_mm_entry.textChanged. \
                    disconnect(self.on_excellon_format_changed)
            except TypeError:
                pass

            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_zeros_radio.activated_custom. \
                    disconnect(self.on_excellon_zeros_changed)
            except TypeError:
                pass
            try:
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio.activated_custom. \
                    disconnect(self.on_excellon_zeros_changed)
            except TypeError:
                pass

    def on_excellon_format_changed(self):
        """
        Slot activated when the user changes the Excellon format values in Preferences -> Excellon -> Excellon General
        :return: None
        """
        if self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio.get_value().upper() == 'METRIC':
            self.ui.excellon_defaults_form.excellon_exp_group.format_whole_entry.set_value(
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_mm_entry.get_value()
            )
            self.ui.excellon_defaults_form.excellon_exp_group.format_dec_entry.set_value(
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_mm_entry.get_value()
            )
        else:
            self.ui.excellon_defaults_form.excellon_exp_group.format_whole_entry.set_value(
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_upper_in_entry.get_value()
            )
            self.ui.excellon_defaults_form.excellon_exp_group.format_dec_entry.set_value(
                self.ui.excellon_defaults_form.excellon_gen_group.excellon_format_lower_in_entry.get_value()
            )

    def on_excellon_zeros_changed(self):
        """
        Slot activated when the user changes the Excellon zeros values in Preferences -> Excellon -> Excellon General
        :return: None
        """
        self.ui.excellon_defaults_form.excellon_exp_group.zeros_radio.set_value(
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_zeros_radio.get_value() + 'Z'
        )

    def on_excellon_units_changed(self):
        """
        Slot activated when the user changes the Excellon unit values in Preferences -> Excellon -> Excellon General
        :return: None
        """
        self.ui.excellon_defaults_form.excellon_exp_group.excellon_units_radio.set_value(
            self.ui.excellon_defaults_form.excellon_gen_group.excellon_units_radio.get_value()
        )
        self.on_excellon_format_changed()

    # Setting plot colors handlers
    def on_pf_color_entry(self):
        self.defaults['global_plot_fill'] = \
            self.ui.general_defaults_form.general_gui_group.pf_color_entry.get_value()[:7] + \
            self.defaults['global_plot_fill'][7:9]
        self.ui.general_defaults_form.general_gui_group.pf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_plot_fill'])[:7])

    def on_pf_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_plot_fill'][:7])

        c_dialog = QtWidgets.QColorDialog()
        plot_fill_color = c_dialog.getColor(initial=current_color)

        if plot_fill_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.pf_color_button.setStyleSheet(
            "background-color:%s" % str(plot_fill_color.name()))

        new_val = str(plot_fill_color.name()) + str(self.defaults['global_plot_fill'][7:9])
        self.ui.general_defaults_form.general_gui_group.pf_color_entry.set_value(new_val)
        self.defaults['global_plot_fill'] = new_val

    def on_pf_color_spinner(self):
        spinner_value = self.ui.general_defaults_form.general_gui_group.pf_color_alpha_spinner.value()
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_slider.setValue(spinner_value)
        self.defaults['global_plot_fill'] = \
            self.defaults['global_plot_fill'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')
        self.defaults['global_plot_line'] = \
            self.defaults['global_plot_line'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')

    def on_pf_color_slider(self):
        slider_value = self.ui.general_defaults_form.general_gui_group.pf_color_alpha_slider.value()
        self.ui.general_defaults_form.general_gui_group.pf_color_alpha_spinner.setValue(slider_value)

    def on_pl_color_entry(self):
        self.defaults['global_plot_line'] = \
            self.ui.general_defaults_form.general_gui_group.pl_color_entry.get_value()[:7] + \
            self.defaults['global_plot_line'][7:9]
        self.ui.general_defaults_form.general_gui_group.pl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_plot_line'])[:7])

    def on_pl_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_plot_line'][:7])
        # print(current_color)

        c_dialog = QtWidgets.QColorDialog()
        plot_line_color = c_dialog.getColor(initial=current_color)

        if plot_line_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.pl_color_button.setStyleSheet(
            "background-color:%s" % str(plot_line_color.name()))

        new_val_line = str(plot_line_color.name()) + str(self.defaults['global_plot_line'][7:9])
        self.ui.general_defaults_form.general_gui_group.pl_color_entry.set_value(new_val_line)
        self.defaults['global_plot_line'] = new_val_line

    # Setting selection colors (left - right) handlers
    def on_sf_color_entry(self):
        self.defaults['global_sel_fill'] = \
            self.ui.general_defaults_form.general_gui_group.sf_color_entry.get_value()[:7] + \
            self.defaults['global_sel_fill'][7:9]
        self.ui.general_defaults_form.general_gui_group.sf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_fill'])[:7])

    def on_sf_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_sel_fill'][:7])

        c_dialog = QtWidgets.QColorDialog()
        plot_fill_color = c_dialog.getColor(initial=current_color)

        if plot_fill_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.sf_color_button.setStyleSheet(
            "background-color:%s" % str(plot_fill_color.name()))

        new_val = str(plot_fill_color.name()) + str(self.defaults['global_sel_fill'][7:9])
        self.ui.general_defaults_form.general_gui_group.sf_color_entry.set_value(new_val)
        self.defaults['global_sel_fill'] = new_val

    def on_sf_color_spinner(self):
        spinner_value = self.ui.general_defaults_form.general_gui_group.sf_color_alpha_spinner.value()
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_slider.setValue(spinner_value)
        self.defaults['global_sel_fill'] = \
            self.defaults['global_sel_fill'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')
        self.defaults['global_sel_line'] = \
            self.defaults['global_sel_line'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')

    def on_sf_color_slider(self):
        slider_value = self.ui.general_defaults_form.general_gui_group.sf_color_alpha_slider.value()
        self.ui.general_defaults_form.general_gui_group.sf_color_alpha_spinner.setValue(slider_value)

    def on_sl_color_entry(self):
        self.defaults['global_sel_line'] = \
            self.ui.general_defaults_form.general_gui_group.sl_color_entry.get_value()[:7] + \
            self.defaults['global_sel_line'][7:9]
        self.ui.general_defaults_form.general_gui_group.sl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_line'])[:7])

    def on_sl_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_sel_line'][:7])

        c_dialog = QtWidgets.QColorDialog()
        plot_line_color = c_dialog.getColor(initial=current_color)

        if plot_line_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.sl_color_button.setStyleSheet(
            "background-color:%s" % str(plot_line_color.name()))

        new_val_line = str(plot_line_color.name()) + str(self.defaults['global_sel_line'][7:9])
        self.ui.general_defaults_form.general_gui_group.sl_color_entry.set_value(new_val_line)
        self.defaults['global_sel_line'] = new_val_line

    # Setting selection colors (right - left) handlers
    def on_alt_sf_color_entry(self):
        self.defaults['global_alt_sel_fill'] = self.ui.general_defaults_form.general_gui_group \
                                   .alt_sf_color_entry.get_value()[:7] + self.defaults['global_alt_sel_fill'][7:9]
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_alt_sel_fill'])[:7])

    def on_alt_sf_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_alt_sel_fill'][:7])

        c_dialog = QtWidgets.QColorDialog()
        plot_fill_color = c_dialog.getColor(initial=current_color)

        if plot_fill_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.alt_sf_color_button.setStyleSheet(
            "background-color:%s" % str(plot_fill_color.name()))

        new_val = str(plot_fill_color.name()) + str(self.defaults['global_alt_sel_fill'][7:9])
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_entry.set_value(new_val)
        self.defaults['global_alt_sel_fill'] = new_val

    def on_alt_sf_color_spinner(self):
        spinner_value = self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_spinner.value()
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_slider.setValue(spinner_value)
        self.defaults['global_alt_sel_fill'] = \
            self.defaults['global_alt_sel_fill'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')
        self.defaults['global_alt_sel_line'] = \
            self.defaults['global_alt_sel_line'][:7] + \
            (hex(spinner_value)[2:] if int(hex(spinner_value)[2:], 16) > 0 else '00')

    def on_alt_sf_color_slider(self):
        slider_value = self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_slider.value()
        self.ui.general_defaults_form.general_gui_group.alt_sf_color_alpha_spinner.setValue(slider_value)

    def on_alt_sl_color_entry(self):
        self.defaults['global_alt_sel_line'] = \
            self.ui.general_defaults_form.general_gui_group.alt_sl_color_entry.get_value()[:7] + \
            self.defaults['global_alt_sel_line'][7:9]
        self.ui.general_defaults_form.general_gui_group.alt_sl_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_alt_sel_line'])[:7])

    def on_alt_sl_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_alt_sel_line'][:7])

        c_dialog = QtWidgets.QColorDialog()
        plot_line_color = c_dialog.getColor(initial=current_color)

        if plot_line_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.alt_sl_color_button.setStyleSheet(
            "background-color:%s" % str(plot_line_color.name()))

        new_val_line = str(plot_line_color.name()) + str(self.defaults['global_alt_sel_line'][7:9])
        self.ui.general_defaults_form.general_gui_group.alt_sl_color_entry.set_value(new_val_line)
        self.defaults['global_alt_sel_line'] = new_val_line

    # Setting Editor colors
    def on_draw_color_entry(self):
        self.defaults['global_draw_color'] = self.ui.general_defaults_form.general_gui_group \
                                                   .draw_color_entry.get_value()
        self.ui.general_defaults_form.general_gui_group.draw_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_draw_color']))

    def on_draw_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_draw_color'])

        c_dialog = QtWidgets.QColorDialog()
        draw_color = c_dialog.getColor(initial=current_color)

        if draw_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.draw_color_button.setStyleSheet(
            "background-color:%s" % str(draw_color.name()))

        new_val = str(draw_color.name())
        self.ui.general_defaults_form.general_gui_group.draw_color_entry.set_value(new_val)
        self.defaults['global_draw_color'] = new_val

    def on_sel_draw_color_entry(self):
        self.defaults['global_sel_draw_color'] = self.ui.general_defaults_form.general_gui_group \
                                                   .sel_draw_color_entry.get_value()
        self.ui.general_defaults_form.general_gui_group.sel_draw_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_sel_draw_color']))

    def on_sel_draw_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_sel_draw_color'])

        c_dialog = QtWidgets.QColorDialog()
        sel_draw_color = c_dialog.getColor(initial=current_color)

        if sel_draw_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.sel_draw_color_button.setStyleSheet(
            "background-color:%s" % str(sel_draw_color.name()))

        new_val_sel = str(sel_draw_color.name())
        self.ui.general_defaults_form.general_gui_group.sel_draw_color_entry.set_value(new_val_sel)
        self.defaults['global_sel_draw_color'] = new_val_sel

    def on_proj_color_entry(self):
        self.defaults['global_proj_item_color'] = self.ui.general_defaults_form.general_gui_group \
                                                   .proj_color_entry.get_value()
        self.ui.general_defaults_form.general_gui_group.proj_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_proj_item_color']))

    def on_proj_color_button(self):
        current_color = QtGui.QColor(self.defaults['global_proj_item_color'])

        c_dialog = QtWidgets.QColorDialog()
        proj_color = c_dialog.getColor(initial=current_color)

        if proj_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.proj_color_button.setStyleSheet(
            "background-color:%s" % str(proj_color.name()))

        new_val_sel = str(proj_color.name())
        self.ui.general_defaults_form.general_gui_group.proj_color_entry.set_value(new_val_sel)
        self.defaults['global_proj_item_color'] = new_val_sel

    def on_proj_color_dis_entry(self):
        self.defaults['global_proj_item_dis_color'] = self.ui.general_defaults_form.general_gui_group \
                                                   .proj_color_dis_entry.get_value()
        self.ui.general_defaults_form.general_gui_group.proj_color_dis_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['global_proj_item_dis_color']))

    def on_proj_color_dis_button(self):
        current_color = QtGui.QColor(self.defaults['global_proj_item_dis_color'])

        c_dialog = QtWidgets.QColorDialog()
        proj_color = c_dialog.getColor(initial=current_color)

        if proj_color.isValid() is False:
            return

        self.ui.general_defaults_form.general_gui_group.proj_color_dis_button.setStyleSheet(
            "background-color:%s" % str(proj_color.name()))

        new_val_sel = str(proj_color.name())
        self.ui.general_defaults_form.general_gui_group.proj_color_dis_entry.set_value(new_val_sel)
        self.defaults['global_proj_item_dis_color'] = new_val_sel

    def on_annotation_fontcolor_entry(self):
        self.defaults['cncjob_annotation_fontcolor'] = \
            self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_entry.get_value()
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['cncjob_annotation_fontcolor']))

    def on_annotation_fontcolor_button(self):
        current_color = QtGui.QColor(self.defaults['cncjob_annotation_fontcolor'])

        c_dialog = QtWidgets.QColorDialog()
        annotation_color = c_dialog.getColor(initial=current_color)

        if annotation_color.isValid() is False:
            return

        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_button.setStyleSheet(
            "background-color:%s" % str(annotation_color.name()))

        new_val_sel = str(annotation_color.name())
        self.ui.cncjob_defaults_form.cncjob_adv_opt_group.annotation_fontcolor_entry.set_value(new_val_sel)
        self.defaults['cncjob_annotation_fontcolor'] = new_val_sel

    def on_film_color_entry(self):
        self.defaults['tools_film_color'] = \
            self.ui.tools_defaults_form.tools_film_group.film_color_entry.get_value()
        self.ui.tools_defaults_form.tools_film_group.film_color_button.setStyleSheet(
            "background-color:%s" % str(self.defaults['tools_film_color']))

    def on_film_color_button(self):
        current_color = QtGui.QColor(self.defaults['tools_film_color'])

        c_dialog = QtWidgets.QColorDialog()
        film_color = c_dialog.getColor(initial=current_color)

        if film_color.isValid() is False:
            return

        # if new color is different then mark that the Preferences are changed
        if film_color != current_color:
            self.on_preferences_edited()

        self.ui.tools_defaults_form.tools_film_group.film_color_button.setStyleSheet(
            "background-color:%s" % str(film_color.name()))

        new_val_sel = str(film_color.name())
        self.ui.tools_defaults_form.tools_film_group.film_color_entry.set_value(new_val_sel)
        self.defaults['tools_film_color'] = new_val_sel

    def on_splash_changed(self, state):
        settings = QSettings("Open Source", "FlatCAM")
        settings.setValue('splash_screen', 1) if state else settings.setValue('splash_screen', 0)

        # This will write the setting to the platform specific storage.
        del settings

    def on_notebook_tab_rmb_click(self, checked):
        self.ui.notebook.set_detachable(val=checked)
        self.defaults["global_tabs_detachable"] = checked

        self.ui.plot_tab_area.set_detachable(val=checked)
        self.defaults["global_tabs_detachable"] = checked

    def on_deselect_all(self):
        self.collection.set_all_inactive()
        self.delete_selection_shape()

    def on_workspace_modified(self):
        self.save_defaults(silent=True)
        self.plotcanvas.draw_workspace()

    def on_workspace(self):
        self.report_usage("on_workspace()")

        if self.ui.general_defaults_form.general_gui_group.workspace_cb.isChecked():
            self.plotcanvas.restore_workspace()
        else:
            self.plotcanvas.delete_workspace()

        self.save_defaults(silent=True)

    def on_workspace_menu(self):
        if self.ui.general_defaults_form.general_gui_group.workspace_cb.isChecked():
            self.ui.general_defaults_form.general_gui_group.workspace_cb.setChecked(False)
        else:
            self.ui.general_defaults_form.general_gui_group.workspace_cb.setChecked(True)
        self.on_workspace()

    def on_layout(self, index=None, lay=None):
        self.report_usage("on_layout()")
        if lay:
            current_layout = lay
        else:
            current_layout = self.ui.general_defaults_form.general_gui_set_group.layout_combo.get_value()

        settings = QSettings("Open Source", "FlatCAM")
        settings.setValue('layout', current_layout)

        # This will write the setting to the platform specific storage.
        del settings

        # first remove the toolbars:
        try:
            self.ui.removeToolBar(self.ui.toolbarfile)
            self.ui.removeToolBar(self.ui.toolbargeo)
            self.ui.removeToolBar(self.ui.toolbarview)
            self.ui.removeToolBar(self.ui.toolbarshell)
            self.ui.removeToolBar(self.ui.toolbartools)
            self.ui.removeToolBar(self.ui.exc_edit_toolbar)
            self.ui.removeToolBar(self.ui.geo_edit_toolbar)
            self.ui.removeToolBar(self.ui.grb_edit_toolbar)
            self.ui.removeToolBar(self.ui.snap_toolbar)
            self.ui.removeToolBar(self.ui.toolbarshell)
        except Exception as e:
            pass

        if current_layout == 'standard':
            # ## TOOLBAR INSTALLATION # ##
            self.ui.toolbarfile = QtWidgets.QToolBar('File Toolbar')
            self.ui.toolbarfile.setObjectName('File_TB')
            self.ui.addToolBar(self.ui.toolbarfile)

            self.ui.toolbargeo = QtWidgets.QToolBar('Edit Toolbar')
            self.ui.toolbargeo.setObjectName('Edit_TB')
            self.ui.addToolBar(self.ui.toolbargeo)

            self.ui.toolbarview = QtWidgets.QToolBar('View Toolbar')
            self.ui.toolbarview.setObjectName('View_TB')
            self.ui.addToolBar(self.ui.toolbarview)

            self.ui.toolbarshell = QtWidgets.QToolBar('Shell Toolbar')
            self.ui.toolbarshell.setObjectName('Shell_TB')
            self.ui.addToolBar(self.ui.toolbarshell)

            self.ui.toolbartools = QtWidgets.QToolBar('Tools Toolbar')
            self.ui.toolbartools.setObjectName('Tools_TB')
            self.ui.addToolBar(self.ui.toolbartools)

            self.ui.exc_edit_toolbar = QtWidgets.QToolBar('Excellon Editor Toolbar')
            # self.ui.exc_edit_toolbar.setVisible(False)
            self.ui.exc_edit_toolbar.setObjectName('ExcEditor_TB')
            self.ui.addToolBar(self.ui.exc_edit_toolbar)

            self.ui.addToolBarBreak()

            self.ui.geo_edit_toolbar = QtWidgets.QToolBar('Geometry Editor Toolbar')
            # self.ui.geo_edit_toolbar.setVisible(False)
            self.ui.geo_edit_toolbar.setObjectName('GeoEditor_TB')
            self.ui.addToolBar(self.ui.geo_edit_toolbar)

            self.ui.grb_edit_toolbar = QtWidgets.QToolBar('Gerber Editor Toolbar')
            # self.ui.grb_edit_toolbar.setVisible(False)
            self.ui.grb_edit_toolbar.setObjectName('GrbEditor_TB')
            self.ui.addToolBar(self.ui.grb_edit_toolbar)

            self.ui.snap_toolbar = QtWidgets.QToolBar('Grid Toolbar')
            self.ui.snap_toolbar.setObjectName('Snap_TB')
            # self.ui.snap_toolbar.setMaximumHeight(30)
            self.ui.addToolBar(self.ui.snap_toolbar)

            self.ui.corner_snap_btn.setVisible(False)
            self.ui.snap_magnet.setVisible(False)
        elif current_layout == 'compact':
            # ## TOOLBAR INSTALLATION # ##
            self.ui.toolbarfile = QtWidgets.QToolBar('File Toolbar')
            self.ui.toolbarfile.setObjectName('File_TB')
            self.ui.addToolBar(Qt.LeftToolBarArea, self.ui.toolbarfile)

            self.ui.toolbargeo = QtWidgets.QToolBar('Edit Toolbar')
            self.ui.toolbargeo.setObjectName('Edit_TB')
            self.ui.addToolBar(Qt.LeftToolBarArea, self.ui.toolbargeo)


            self.ui.toolbarshell = QtWidgets.QToolBar('Shell Toolbar')
            self.ui.toolbarshell.setObjectName('Shell_TB')
            self.ui.addToolBar(Qt.LeftToolBarArea, self.ui.toolbarshell)

            self.ui.toolbartools = QtWidgets.QToolBar('Tools Toolbar')
            self.ui.toolbartools.setObjectName('Tools_TB')
            self.ui.addToolBar(Qt.LeftToolBarArea, self.ui.toolbartools)

            self.ui.geo_edit_toolbar = QtWidgets.QToolBar('Geometry Editor Toolbar')
            # self.ui.geo_edit_toolbar.setVisible(False)
            self.ui.geo_edit_toolbar.setObjectName('GeoEditor_TB')
            self.ui.addToolBar(Qt.RightToolBarArea, self.ui.geo_edit_toolbar)

            self.ui.toolbarview = QtWidgets.QToolBar('View Toolbar')
            self.ui.toolbarview.setObjectName('View_TB')
            self.ui.addToolBar(Qt.RightToolBarArea, self.ui.toolbarview)

            self.ui.addToolBarBreak(area=Qt.RightToolBarArea)

            self.ui.grb_edit_toolbar = QtWidgets.QToolBar('Gerber Editor Toolbar')
            # self.ui.grb_edit_toolbar.setVisible(False)
            self.ui.grb_edit_toolbar.setObjectName('GrbEditor_TB')
            self.ui.addToolBar(Qt.RightToolBarArea, self.ui.grb_edit_toolbar)

            self.ui.exc_edit_toolbar = QtWidgets.QToolBar('Excellon Editor Toolbar')
            self.ui.exc_edit_toolbar.setObjectName('ExcEditor_TB')
            self.ui.addToolBar(Qt.RightToolBarArea, self.ui.exc_edit_toolbar)

            self.ui.snap_toolbar = QtWidgets.QToolBar('Grid Toolbar')
            self.ui.snap_toolbar.setObjectName('Snap_TB')
            self.ui.snap_toolbar.setMaximumHeight(30)
            self.ui.splitter_left.addWidget(self.ui.snap_toolbar)

            self.ui.corner_snap_btn.setVisible(True)
            self.ui.snap_magnet.setVisible(True)

        # add all the actions to the toolbars
        self.ui.populate_toolbars()

        # reconnect all the signals to the toolbar actions
        self.connect_toolbar_signals()

        self.ui.grid_snap_btn.setChecked(True)
        self.ui.grid_gap_x_entry.setText(str(self.defaults["global_gridx"]))
        self.ui.grid_gap_y_entry.setText(str(self.defaults["global_gridy"]))
        self.ui.snap_max_dist_entry.setText(str(self.defaults["global_snap_max"]))
        self.ui.grid_gap_link_cb.setChecked(True)

    def on_cnc_custom_parameters(self, signal_text):
        if signal_text == 'Parameters':
            return
        else:
            self.ui.cncjob_defaults_form.cncjob_adv_opt_group.toolchange_text.insertPlainText('%%%s%%' % signal_text)

    def on_save_button(self):
        log.debug("App.on_save_button() --> Saving preferences to file.")
        self.preferences_changed_flag = False

        self.save_defaults(silent=False)
        # load the defaults so they are updated into the app
        self.load_defaults(filename='current_defaults')
        # Re-fresh project options
        self.on_options_app2project()

        # save the notebook font size
        settings = QSettings("Open Source", "FlatCAM")
        fsize = self.ui.general_defaults_form.general_gui_set_group.notebook_font_size_spinner.get_value()
        settings.setValue('notebook_font_size', fsize)

        # save the axis font size
        g_fsize = self.ui.general_defaults_form.general_gui_set_group.axis_font_size_spinner.get_value()
        settings.setValue('axis_font_size', g_fsize)

        # This will write the setting to the platform specific storage.
        del settings

    def handlePrint(self):
        self.report_usage("handlePrint()")

        dialog = QtPrintSupport.QPrintDialog()
        if dialog.exec_() == QtWidgets.QDialog.Accepted:
            self.ui.code_editor.document().print_(dialog.printer())

    def handlePreview(self):
        self.report_usage("handlePreview()")

        dialog = QtPrintSupport.QPrintPreviewDialog()
        dialog.paintRequested.connect(self.ui.code_editor.print_)
        dialog.exec_()

    def handleTextChanged(self):
        # enable = not self.ui.code_editor.document().isEmpty()
        # self.ui.buttonPrint.setEnabled(enable)
        # self.ui.buttonPreview.setEnabled(enable)
        pass

    def handleOpen(self, filt=None):
        self.report_usage("handleOpen()")

        if filt:
            _filter_ = filt
        else:
            _filter_ = "G-Code Files (*.nc);; G-Code Files (*.txt);; G-Code Files (*.tap);; G-Code Files (*.cnc);; " \
                       "All Files (*.*)"

        path, _f = QtWidgets.QFileDialog.getOpenFileName(
            caption=_('Open file'), directory=self.get_last_folder(), filter=_filter_)

        if path:
            file = QtCore.QFile(path)
            if file.open(QtCore.QIODevice.ReadOnly):
                stream = QtCore.QTextStream(file)
                self.gcode_edited = stream.readAll()
                self.ui.code_editor.setPlainText(self.gcode_edited)
                file.close()

    def handleSaveGCode(self, name=None, filt=None):
        self.report_usage("handleSaveGCode()")

        if filt:
            _filter_ = filt
        else:
            _filter_ = "G-Code Files (*.nc);; G-Code Files (*.txt);; G-Code Files (*.tap);; G-Code Files (*.cnc);; " \
                       "All Files (*.*)"

        if name:
            obj_name = name
        else:
            try:
                obj_name = self.collection.get_active().options['name']
            except AttributeError:
                obj_name = 'file'
                if filt is None:
                    _filter_ = "FlatConfig Files (*.FlatConfig);;All Files (*.*)"

        try:
            filename = str(QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export G-Code ..."),
                directory=self.defaults["global_last_folder"] + '/' + str(obj_name),
                filter=_filter_
            )[0])
        except TypeError:
            filename = str(QtWidgets.QFileDialog.getSaveFileName(caption=_("Export G-Code ..."), filter=_filter_)[0])

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Export Code cancelled."))
            return
        else:
            try:
                my_gcode = self.ui.code_editor.toPlainText()
                with open(filename, 'w') as f:
                    for line in my_gcode:
                        f.write(line)
            except FileNotFoundError:
                self.inform.emit('[WARNING] %s' %
                                 _("No such file or directory"))
                return
            except PermissionError:
                self.inform.emit('[WARNING] %s' %
                                 _("Permission denied, saving not possible.\n"
                                   "Most likely another app is holding the file open and not accessible."))
                return

        # Just for adding it to the recent files list.
        if self.defaults["global_open_style"] is False:
            self.file_opened.emit("cncjob", filename)
        self.file_saved.emit("cncjob", filename)
        self.inform.emit('%s: %s' % (_("Saved to"), str(filename)))

    def handleFindGCode(self):
        self.report_usage("handleFindGCode()")

        flags = QtGui.QTextDocument.FindCaseSensitively
        text_to_be_found = self.ui.entryFind.get_value()

        r = self.ui.code_editor.find(str(text_to_be_found), flags)
        if r is False:
            self.ui.code_editor.moveCursor(QtGui.QTextCursor.Start)

    def handleReplaceGCode(self):
        self.report_usage("handleReplaceGCode()")

        old = self.ui.entryFind.get_value()
        new = self.ui.entryReplace.get_value()

        if self.ui.sel_all_cb.isChecked():
            while True:
                cursor = self.ui.code_editor.textCursor()
                cursor.beginEditBlock()
                flags = QtGui.QTextDocument.FindCaseSensitively
                # self.ui.editor is the QPlainTextEdit
                r = self.ui.code_editor.find(str(old), flags)
                if r:
                    qc = self.ui.code_editor.textCursor()
                    if qc.hasSelection():
                        qc.insertText(new)
                else:
                    self.ui.code_editor.moveCursor(QtGui.QTextCursor.Start)
                    break
            # Mark end of undo block
            cursor.endEditBlock()
        else:
            cursor = self.ui.code_editor.textCursor()
            cursor.beginEditBlock()
            qc = self.ui.code_editor.textCursor()
            if qc.hasSelection():
                qc.insertText(new)
            # Mark end of undo block
            cursor.endEditBlock()

    def handleRunCode(self):
        # trying to run a Tcl command without having the Shell open will create some warnings because the Tcl Shell
        # tries to print on a hidden widget, therefore show the dock if hidden
        if self.ui.shell_dock.isHidden():
            self.ui.shell_dock.show()

        self.script_code = deepcopy(self.ui.code_editor.toPlainText())
        # self.shell._sysShell.exec_command(script_code)

        old_line = ''
        for tcl_command_line in self.script_code.splitlines():
            # do not process lines starting with '#' = comment and empty lines
            if not tcl_command_line.startswith('#') and tcl_command_line != '':
                # id FlatCAM is run in Windows then replace all the slashes with
                # the UNIX style slash that TCL understands
                if sys.platform == 'win32':
                    if "open" in tcl_command_line:
                        tcl_command_line = tcl_command_line.replace('\\', '/')

                if old_line != '':
                    new_command = old_line + tcl_command_line + '\n'
                else:
                    new_command = tcl_command_line

                # execute the actual Tcl command
                try:
                    self.shell.open_proccessing()  # Disables input box.

                    result = self.tcl.eval(str(new_command))
                    if result != 'None':
                        self.shell.append_output(result + '\n')

                    old_line = ''
                except tk.TclError:
                    old_line = old_line + tcl_command_line + '\n'
                except Exception as e:
                    log.debug("App.handleRunCode() --> %s" % str(e))

        if old_line != '':
            # it means that the script finished with an error
            result = self.tcl.eval("set errorInfo")
            self.log.error("Exec command Exception: %s" % (result + '\n'))
            self.shell.append_error('ERROR: ' + result + '\n')

        self.shell.close_proccessing()

    def on_tool_add_keypress(self):
        # ## Current application units in Upper Case
        self.units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()

        notebook_widget_name = self.ui.notebook.currentWidget().objectName()

        # work only if the notebook tab on focus is the Selected_Tab and only if the object is Geometry
        if notebook_widget_name == 'selected_tab':
            if str(type(self.collection.get_active())) == "<class 'FlatCAMObj.FlatCAMGeometry'>":
                # Tool add works for Geometry only if Advanced is True in Preferences
                if self.defaults["global_app_level"] == 'a':
                    tool_add_popup = FCInputDialog(title="New Tool ...",
                                                   text='Enter a Tool Diameter:',
                                                   min=0.0000, max=99.9999, decimals=4)
                    tool_add_popup.setWindowIcon(QtGui.QIcon('share/letter_t_32.png'))

                    val, ok = tool_add_popup.get_value()
                    if ok:
                        if float(val) == 0:
                            self.inform.emit('[WARNING_NOTCL] %s' %
                                             _("Please enter a tool diameter with non-zero value, in Float format."))
                            return
                        self.collection.get_active().on_tool_add(dia=float(val))
                    else:
                        self.inform.emit('[WARNING_NOTCL] %s...' %
                                         _("Adding Tool cancelled"))
                else:
                    msgbox = QtWidgets.QMessageBox()
                    msgbox.setText(_("Adding Tool works only when Advanced is checked.\n"
                                   "Go to Preferences -> General - Show Advanced Options."))
                    msgbox.setWindowTitle("Tool adding ...")
                    msgbox.setWindowIcon(QtGui.QIcon('share/warning.png'))
                    bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)

                    msgbox.setDefaultButton(bt_ok)
                    msgbox.exec_()

        # work only if the notebook tab on focus is the Tools_Tab
        if notebook_widget_name == 'tool_tab':
            tool_widget = self.ui.tool_scroll_area.widget().objectName()

            tool_add_popup = FCInputDialog(title="New Tool ...",
                                           text='Enter a Tool Diameter:',
                                           min=0.0000, max=99.9999, decimals=4)
            tool_add_popup.setWindowIcon(QtGui.QIcon('share/letter_t_32.png'))

            val, ok = tool_add_popup.get_value()

            # and only if the tool is NCC Tool
            if tool_widget == self.ncclear_tool.toolName:
                if ok:
                    if float(val) == 0:
                        self.inform.emit('[WARNING_NOTCL] %s' %
                                         _("Please enter a tool diameter with non-zero value, in Float format."))
                        return
                    self.ncclear_tool.on_tool_add(dia=float(val))
                else:
                    self.inform.emit('[WARNING_NOTCL] %s...' %
                                     _("Adding Tool cancelled"))
            # and only if the tool is Paint Area Tool
            elif tool_widget == self.paint_tool.toolName:
                if ok:
                    if float(val) == 0:
                        self.inform.emit('[WARNING_NOTCL] %s' %
                                         _("Please enter a tool diameter with non-zero value, in Float format."))
                        return
                    self.paint_tool.on_tool_add(dia=float(val))
                else:
                    self.inform.emit('[WARNING_NOTCL] %s...' %
                                     _("Adding Tool cancelled"))
            # and only if the tool is Solder Paste Dispensing Tool
            elif tool_widget == self.paste_tool.toolName:
                if ok:
                    if float(val) == 0:
                        self.inform.emit('[WARNING_NOTCL] %s' %
                                         _("Please enter a tool diameter with non-zero value, in Float format."))
                        return
                    self.paste_tool.on_tool_add(dia=float(val))
                else:
                    self.inform.emit('[WARNING_NOTCL] %s...' %
                                     _("Adding Tool cancelled"))

    # It's meant to delete tools in tool tables via a 'Delete' shortcut key but only if certain conditions are met
    # See description bellow.
    def on_delete_keypress(self):
        notebook_widget_name = self.ui.notebook.currentWidget().objectName()

        # work only if the notebook tab on focus is the Selected_Tab and only if the object is Geometry
        if notebook_widget_name == 'selected_tab':
            if str(type(self.collection.get_active())) == "<class 'FlatCAMObj.FlatCAMGeometry'>":
                self.collection.get_active().on_tool_delete()

        # work only if the notebook tab on focus is the Tools_Tab
        elif notebook_widget_name == 'tool_tab':
            tool_widget = self.ui.tool_scroll_area.widget().objectName()

            # and only if the tool is NCC Tool
            if tool_widget == self.ncclear_tool.toolName:
                self.ncclear_tool.on_tool_delete()

            # and only if the tool is Paint Tool
            elif tool_widget == self.paint_tool.toolName:
                self.paint_tool.on_tool_delete()

            # and only if the tool is Solder Paste Dispensing Tool
            elif tool_widget == self.paste_tool.toolName:
                self.paste_tool.on_tool_delete()
        else:
            self.on_delete()

    # It's meant to delete selected objects. It work also activated by a shortcut key 'Delete' same as above so in
    # some screens you have to be careful where you hover with your mouse.
    # Hovering over Selected tab, if the selected tab is a Geometry it will delete tools in tool table. But even if
    # there is a Selected tab in focus with a Geometry inside, if you hover over canvas it will delete an object.
    # Complicated, I know :)
    def on_delete(self):
        """
        Delete the currently selected FlatCAMObjs.

        :return: None
        """
        self.report_usage("on_delete()")

        response = None
        bt_ok = None

        # Make sure that the deletion will happen only after the Editor is no longer active otherwise we might delete
        # a geometry object before we update it.
        if self.geo_editor.editor_active is False and self.exc_editor.editor_active is False \
                and self.grb_editor.editor_active is False:
            if self.defaults["global_delete_confirmation"] is True:
                msgbox = QtWidgets.QMessageBox()
                msgbox.setWindowTitle(_("Delete objects"))
                msgbox.setWindowIcon(QtGui.QIcon('share/deleteshape32.png'))
                # msgbox.setText("<B>%s</B>" % _("Change project units ..."))
                msgbox.setText(_("Are you sure you want to permanently delete\n"
                                 "the selected objects?"))
                bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
                bt_cancel = msgbox.addButton(_('Cancel'), QtWidgets.QMessageBox.RejectRole)

                msgbox.setDefaultButton(bt_ok)
                msgbox.exec_()
                response = msgbox.clickedButton()

            if response == bt_ok or self.defaults["global_delete_confirmation"] is False:
                if self.collection.get_active():
                    self.log.debug("App.on_delete()")

                    while self.collection.get_active():
                        obj_active = self.collection.get_active()
                        # if the deleted object is FlatCAMGerber then make sure to delete the possible mark shapes
                        if isinstance(obj_active, FlatCAMGerber):
                            for el in obj_active.mark_shapes:
                                obj_active.mark_shapes[el].clear(update=True)
                                obj_active.mark_shapes[el].enabled = False
                                # obj_active.mark_shapes[el] = None
                                del el
                        elif isinstance(obj_active, FlatCAMCNCjob):
                            try:
                                obj_active.annotation.clear(update=True)
                                obj_active.annotation.enabled = False
                            except AttributeError:
                                pass
                        self.delete_first_selected()

                    self.inform.emit('%s...' %
                                     _("Object(s) deleted"))
                    # make sure that the selection shape is deleted, too
                    self.delete_selection_shape()
                else:
                    self.inform.emit(_("Failed. No object(s) selected..."))
        else:
            self.inform.emit(_("Save the work in Editor and try again ..."))

    def delete_first_selected(self):
        # Keep this for later
        try:
            sel_obj = self.collection.get_active()
            name = sel_obj.options["name"]
        except AttributeError:
            self.log.debug("Nothing selected for deletion")
            return

        # Remove from dictionary
        self.collection.delete_active()

        # Clear form
        self.setup_component_editor()

        self.inform.emit('%s: %s' %
                         (_("Object deleted"), name))

    def on_set_origin(self):
        """
        Set the origin to the left mouse click position

        :return: None
        """

        # display the message for the user
        # and ask him to click on the desired position
        self.report_usage("on_set_origin()")

        def origin_replot():

            def worker_task():
                with self.proc_container.new('%s...' % _("Plotting")):
                    for obj in self.collection.get_list():
                        obj.plot()
                    self.plotcanvas.fit_view()
                self.plotcanvas.vis_disconnect('mouse_press', self.on_set_zero_click)

            self.worker_task.emit({'fcn': worker_task, 'params': []})

        self.inform.emit(_('Click to set the origin ...'))
        self.plotcanvas.vis_connect('mouse_press', self.on_set_zero_click)

        # first disconnect it as it may have been used by something else
        try:
            self.replot_signal.disconnect()
        except TypeError:
            pass
        self.replot_signal[list].connect(origin_replot)

    def on_set_zero_click(self, event):
        # this function will be available only for mouse left click

        pos_canvas = self.plotcanvas.translate_coords(event.pos)
        if event.button == 1:
            if self.grid_status() == True:
                pos = self.geo_editor.snap(pos_canvas[0], pos_canvas[1])
            else:
                pos = pos_canvas

            x = 0 - pos[0]
            y = 0 - pos[1]

            def worker_task():
                with self.proc_container.new(_("Setting Origin...")):
                    for obj in self.collection.get_list():
                        obj.offset((x, y))
                        self.object_changed.emit(obj)

                        # Update the object bounding box options
                        a, b, c, d = obj.bounds()
                        obj.options['xmin'] = a
                        obj.options['ymin'] = b
                        obj.options['xmax'] = c
                        obj.options['ymax'] = d
                    self.inform.emit('[success]%s...' %
                                     _('Origin set'))
                    self.replot_signal.emit([])

            self.worker_task.emit({'fcn': worker_task, 'params': []})
            self.should_we_save = True

    def on_jump_to(self, custom_location=None, fit_center=True):
        """
        Jump to a location by setting the mouse cursor location
        :return:

        """
        self.report_usage("on_jump_to()")

        if not custom_location:
            dia_box = Dialog_box(title=_("Jump to ..."),
                                 label=_("Enter the coordinates in format X,Y:"),
                                 icon=QtGui.QIcon('share/jump_to16.png'))

            if dia_box.ok is True:
                try:
                    location = eval(dia_box.location)
                    if not isinstance(location, tuple):
                        self.inform.emit(_("Wrong coordinates. Enter coordinates in format: X,Y"))
                        return
                except:
                    return
            else:
                return
        else:
            location = custom_location

        if fit_center:
            self.plotcanvas.fit_center(loc=location)

        cursor = QtGui.QCursor()

        canvas_origin = self.plotcanvas.native.mapToGlobal(QtCore.QPoint(0, 0))
        jump_loc = self.plotcanvas.translate_coords_2((location[0], location[1]))

        cursor.setPos(canvas_origin.x() + jump_loc[0], (canvas_origin.y() + jump_loc[1]))
        self.inform.emit('[success] %s' %
                         _("Done."))
        return location

    def on_copy_object(self):
        self.report_usage("on_copy_object()")

        def initialize(obj_init, app):
            obj_init.solid_geometry = deepcopy(obj.solid_geometry)
            try:
                obj_init.follow_geometry = deepcopy(obj.follow_geometry)
            except AttributeError:
                pass
            try:
                obj_init.apertures = deepcopy(obj.apertures)
            except AttributeError:
                pass

            try:
                if obj.tools:
                    obj_init.tools = deepcopy(obj.tools)
            except Exception as e:
                log.debug("App.on_copy_object() --> %s" % str(e))

        def initialize_excellon(obj_init, app):
            obj_init.tools = deepcopy(obj.tools)

            # drills are offset, so they need to be deep copied
            obj_init.drills = deepcopy(obj.drills)
            # slots are offset, so they need to be deep copied
            obj_init.slots = deepcopy(obj.slots)
            obj_init.create_geometry()

        for obj in self.collection.get_selected():
            obj_name = obj.options["name"]

            try:
                if isinstance(obj, FlatCAMExcellon):
                    self.new_object("excellon", str(obj_name) + "_copy", initialize_excellon)
                elif isinstance(obj, FlatCAMGerber):
                    self.new_object("gerber", str(obj_name) + "_copy", initialize)
                elif isinstance(obj, FlatCAMGeometry):
                    self.new_object("geometry", str(obj_name) + "_copy", initialize)
            except Exception as e:
                return "Operation failed: %s" % str(e)

    def on_copy_object2(self, custom_name):

        def initialize_geometry(obj_init, app):
            obj_init.solid_geometry = deepcopy(obj.solid_geometry)
            try:
                obj_init.follow_geometry = deepcopy(obj.follow_geometry)
            except AttributeError:
                pass
            try:
                obj_init.apertures = deepcopy(obj.apertures)
            except AttributeError:
                pass

            try:
                if obj.tools:
                    obj_init.tools = deepcopy(obj.tools)
            except Exception as e:
                log.debug("on_copy_object2() --> %s" % str(e))

        def initialize_gerber(obj_init, app):
            obj_init.solid_geometry = deepcopy(obj.solid_geometry)
            obj_init.apertures = deepcopy(obj.apertures)
            obj_init.aperture_macros = deepcopy(obj.aperture_macros)

        def initialize_excellon(obj_init, app):
            obj_init.tools = deepcopy(obj.tools)
            # drills are offset, so they need to be deep copied
            obj_init.drills = deepcopy(obj.drills)
            # slots are offset, so they need to be deep copied
            obj_init.slots = deepcopy(obj.slots)
            obj_init.create_geometry()

        for obj in self.collection.get_selected():
            obj_name = obj.options["name"]
            try:
                if isinstance(obj, FlatCAMExcellon):
                    self.new_object("excellon", str(obj_name) + custom_name, initialize_excellon)
                elif isinstance(obj, FlatCAMGerber):
                    self.new_object("gerber", str(obj_name) + custom_name, initialize_gerber)
                elif isinstance(obj, FlatCAMGeometry):
                    self.new_object("geometry", str(obj_name) + custom_name, initialize_geometry)
            except Exception as e:
                return "Operation failed: %s" % str(e)

    def on_rename_object(self, text):
        self.report_usage("on_rename_object()")

        named_obj = self.collection.get_active()
        for obj in named_obj:
            if obj is list:
                self.on_rename_object(text)
            else:
                try:
                    obj.options['name'] = text
                except Exception as e:
                    log.warning("App.on_rename_object() --> Could not rename the object in the list. --> %s" % str(e))

    def convert_any2geo(self):
        self.report_usage("convert_any2geo()")

        def initialize(obj_init, app):
            obj_init.solid_geometry = obj.solid_geometry
            try:
                obj_init.follow_geometry = obj.follow_geometry
            except AttributeError:
                pass
            try:
                obj_init.apertures = obj.apertures
            except AttributeError:
                pass

            try:
                if obj.tools:
                    obj_init.tools = obj.tools
            except AttributeError:
                pass

        def initialize_excellon(obj_init, app):
            # objs = self.collection.get_selected()
            # FlatCAMGeometry.merge(objs, obj)
            solid_geo = []
            for tool in obj.tools:
                for geo in obj.tools[tool]['solid_geometry']:
                    solid_geo.append(geo)
            obj_init.solid_geometry = deepcopy(solid_geo)

        if not self.collection.get_selected():
            log.warning("App.convert_any2geo --> No object selected")
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object is selected. Select an object and try again."))
            return

        for obj in self.collection.get_selected():
            obj_name = obj.options["name"]

            try:
                if isinstance(obj, FlatCAMExcellon):
                    self.new_object("geometry", str(obj_name) + "_conv", initialize_excellon)
                else:
                    self.new_object("geometry", str(obj_name) + "_conv", initialize)
            except Exception as e:
                return "Operation failed: %s" % str(e)

    def convert_any2gerber(self):
        self.report_usage("convert_any2gerber()")

        def initialize_geometry(obj_init, app):
            apertures = {}
            apid = 0

            apertures[str(apid)] = {}
            apertures[str(apid)]['geometry'] = []
            for obj_orig in obj.solid_geometry:
                new_elem = dict()
                new_elem['solid'] = obj_orig
                new_elem['follow'] = obj_orig.exterior
                apertures[str(apid)]['geometry'].append(deepcopy(new_elem))
            apertures[str(apid)]['size'] = 0.0
            apertures[str(apid)]['type'] = 'C'

            obj_init.solid_geometry = deepcopy(obj.solid_geometry)
            obj_init.apertures = deepcopy(apertures)

        def initialize_excellon(obj_init, app):
            apertures = {}

            apid = 10
            for tool in obj.tools:
                apertures[str(apid)] = {}
                apertures[str(apid)]['geometry'] = []
                for geo in obj.tools[tool]['solid_geometry']:
                    new_el = dict()
                    new_el['solid'] = geo
                    new_el['follow'] = geo.exterior
                    apertures[str(apid)]['geometry'].append(deepcopy(new_el))

                apertures[str(apid)]['size'] = float(obj.tools[tool]['C'])
                apertures[str(apid)]['type'] = 'C'
                apid += 1

            # create solid_geometry
            solid_geometry = []
            for apid in apertures:
                for geo_el in apertures[apid]['geometry']:
                    solid_geometry.append(geo_el['solid'])

            solid_geometry = MultiPolygon(solid_geometry)
            solid_geometry = solid_geometry.buffer(0.0000001)

            obj_init.solid_geometry = deepcopy(solid_geometry)
            obj_init.apertures = deepcopy(apertures)
            # clear the working objects (perhaps not necessary due of Python GC)
            apertures.clear()

        if not self.collection.get_selected():
            log.warning("App.convert_any2gerber --> No object selected")
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object is selected. Select an object and try again."))
            return

        for obj in self.collection.get_selected():

            obj_name = obj.options["name"]

            try:
                if isinstance(obj, FlatCAMExcellon):
                    self.new_object("gerber", str(obj_name) + "_conv", initialize_excellon)
                elif isinstance(obj, FlatCAMGeometry):
                    self.new_object("gerber", str(obj_name) + "_conv", initialize_geometry)
                else:
                    log.warning("App.convert_any2gerber --> This is no vaild object for conversion.")

            except Exception as e:
                return "Operation failed: %s" % str(e)

    def abort_all_tasks(self):
        if self.abort_flag is False:
            self.inform.emit(_("Aborting. The current task will be gracefully closed as soon as possible..."))
            self.abort_flag = True

    def app_is_idle(self):
        if self.abort_flag:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("The current task was gracefully closed on user request..."))
            self.abort_flag = False

    def on_selectall(self):
        self.report_usage("on_selectall()")

        # delete the possible selection box around a possible selected object
        self.delete_selection_shape()
        for name in self.collection.get_names():
            self.collection.set_active(name)
            curr_sel_obj = self.collection.get_by_name(name)
            # create the selection box around the selected object
            if self.defaults['global_selection_shape'] is True:
                self.draw_selection_shape(curr_sel_obj)

    def on_preferences(self):
        # add the tab if it was closed
        self.ui.plot_tab_area.addTab(self.ui.preferences_tab, _("Preferences"))

        # delete the absolute and relative position and messages in the infobar
        self.ui.position_label.setText("")
        self.ui.rel_position_label.setText("")

        # Switch plot_area to preferences page
        self.ui.plot_tab_area.setCurrentWidget(self.ui.preferences_tab)
        # self.ui.show()

        # this disconnect() is done so the slot will be connected only once
        try:
            self.ui.plot_tab_area.tab_closed_signal.disconnect(self.on_preferences_closed)
        except (TypeError, AttributeError):
            pass
        self.ui.plot_tab_area.tab_closed_signal.connect(self.on_preferences_closed)

        # detect changes in the preferences
        for idx in range(self.ui.pref_tab_area.count()):
            for tb in self.ui.pref_tab_area.widget(idx).findChildren(QtCore.QObject):
                try:
                    try:
                        tb.textEdited.disconnect(self.on_preferences_edited)
                    except (TypeError, AttributeError):
                        pass
                    tb.textEdited.connect(self.on_preferences_edited)
                except AttributeError:
                    pass

                try:
                    try:
                        tb.modificationChanged.disconnect(self.on_preferences_edited)
                    except (TypeError, AttributeError):
                        pass
                    tb.modificationChanged.connect(self.on_preferences_edited)
                except AttributeError:
                    pass

                try:
                    try:
                        tb.toggled.disconnect(self.on_preferences_edited)
                    except (TypeError, AttributeError):
                        pass
                    tb.toggled.connect(self.on_preferences_edited)
                except AttributeError:
                    pass

                try:
                    try:
                        tb.valueChanged.disconnect(self.on_preferences_edited)
                    except (TypeError, AttributeError):
                        pass
                    tb.valueChanged.connect(self.on_preferences_edited)
                except AttributeError:
                    pass

                try:
                    try:
                        tb.currentIndexChanged.disconnect(self.on_preferences_edited)
                    except (TypeError, AttributeError):
                        pass
                    tb.currentIndexChanged.connect(self.on_preferences_edited)
                except AttributeError:
                    pass

    def on_preferences_edited(self):
        self.inform.emit('[WARNING_NOTCL] %s' %
                         _("Preferences edited but not saved."))
        self.preferences_changed_flag = True

    def on_preferences_closed(self):
        # disconnect
        for idx in range(self.ui.pref_tab_area.count()):
            for tb in self.ui.pref_tab_area.widget(idx).findChildren(QtCore.QObject):
                try:
                    tb.textEdited.disconnect(self.on_preferences_edited)
                except (TypeError, AttributeError):
                    pass

                try:
                    tb.modificationChanged.disconnect(self.on_preferences_edited)
                except (TypeError, AttributeError):
                    pass

                try:
                    tb.toggled.disconnect(self.on_preferences_edited)
                except (TypeError, AttributeError):
                    pass

                try:
                    tb.valueChanged.disconnect(self.on_preferences_edited)
                except (TypeError, AttributeError):
                    pass

                try:
                    tb.currentIndexChanged.disconnect(self.on_preferences_edited)
                except (TypeError, AttributeError):
                    pass

        if self.preferences_changed_flag is True:
            msgbox = QtWidgets.QMessageBox()
            msgbox.setText(_("One or more values are changed.\n"
                             "Do you want to save the Preferences?"))
            msgbox.setWindowTitle(_("Save Preferences"))
            msgbox.setWindowIcon(QtGui.QIcon('share/save_as.png'))

            bt_yes = msgbox.addButton(_('Yes'), QtWidgets.QMessageBox.YesRole)
            bt_no = msgbox.addButton(_('No'), QtWidgets.QMessageBox.NoRole)

            msgbox.setDefaultButton(bt_yes)
            msgbox.exec_()
            response = msgbox.clickedButton()

            if response == bt_yes:
                self.on_save_button()
                self.inform.emit('[success] %s' %
                                 _("Preferences saved."))
            else:
                self.preferences_changed_flag = False
                return

    def on_flipy(self):
        self.report_usage("on_flipy()")

        obj_list = self.collection.get_selected()
        xminlist = []
        yminlist = []
        xmaxlist = []
        ymaxlist = []

        if not obj_list:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected to Flip on Y axis."))
        else:
            try:
                # first get a bounding box to fit all
                for obj in obj_list:
                    xmin, ymin, xmax, ymax = obj.bounds()
                    xminlist.append(xmin)
                    yminlist.append(ymin)
                    xmaxlist.append(xmax)
                    ymaxlist.append(ymax)

                # get the minimum x,y and maximum x,y for all objects selected
                xminimal = min(xminlist)
                yminimal = min(yminlist)
                xmaximal = max(xmaxlist)
                ymaximal = max(ymaxlist)

                px = 0.5 * (xminimal + xmaximal)
                py = 0.5 * (yminimal + ymaximal)

                # execute mirroring
                for obj in obj_list:
                    obj.mirror('X', [px, py])
                    obj.plot()
                    self.object_changed.emit(obj)
                self.inform.emit('[success] %s' %
                                 _("Flip on Y axis done."))
            except Exception as e:
                self.inform.emit('[ERROR_NOTCL] %s: %s' %
                                 (_("Flip action was not executed."), str(e)))
                return

    def on_flipx(self):
        self.report_usage("on_flipx()")

        obj_list = self.collection.get_selected()
        xminlist = []
        yminlist = []
        xmaxlist = []
        ymaxlist = []

        if not obj_list:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected to Flip on X axis."))
        else:
            try:
                # first get a bounding box to fit all
                for obj in obj_list:
                    xmin, ymin, xmax, ymax = obj.bounds()
                    xminlist.append(xmin)
                    yminlist.append(ymin)
                    xmaxlist.append(xmax)
                    ymaxlist.append(ymax)

                # get the minimum x,y and maximum x,y for all objects selected
                xminimal = min(xminlist)
                yminimal = min(yminlist)
                xmaximal = max(xmaxlist)
                ymaximal = max(ymaxlist)

                px = 0.5 * (xminimal + xmaximal)
                py = 0.5 * (yminimal + ymaximal)

                # execute mirroring
                for obj in obj_list:
                    obj.mirror('Y', [px, py])
                    obj.plot()
                    self.object_changed.emit(obj)
                self.inform.emit('[success] %s' %
                                 _("Flip on X axis done."))
            except Exception as e:
                self.inform.emit('[ERROR_NOTCL] %s: %s' %
                                 (_("Flip action was not executed."), str(e)))
                return

    def on_rotate(self, silent=False, preset=None):
        self.report_usage("on_rotate()")

        obj_list = self.collection.get_selected()
        xminlist = []
        yminlist = []
        xmaxlist = []
        ymaxlist = []

        if not obj_list:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected to Rotate."))
        else:
            if silent is False:
                rotatebox = FCInputDialog(title=_("Transform"), text=_("Enter the Angle value:"),
                                          min=-360, max=360, decimals=4,
                                          init_val=float(self.defaults['tools_transform_rotate']))
                num, ok = rotatebox.get_value()
            else:
                num = preset
                ok = True

            if ok:
                try:
                    # first get a bounding box to fit all
                    for obj in obj_list:
                        xmin, ymin, xmax, ymax = obj.bounds()
                        xminlist.append(xmin)
                        yminlist.append(ymin)
                        xmaxlist.append(xmax)
                        ymaxlist.append(ymax)

                    # get the minimum x,y and maximum x,y for all objects selected
                    xminimal = min(xminlist)
                    yminimal = min(yminlist)
                    xmaximal = max(xmaxlist)
                    ymaximal = max(ymaxlist)
                    px = 0.5 * (xminimal + xmaximal)
                    py = 0.5 * (yminimal + ymaximal)

                    for sel_obj in obj_list:
                        sel_obj.rotate(-float(num), point=(px, py))
                        sel_obj.plot()
                        self.object_changed.emit(sel_obj)
                    self.inform.emit('[success] %s' %
                                     _("Rotation done."))
                except Exception as e:
                    self.inform.emit('[ERROR_NOTCL] %s: %s' %
                                     (_("Rotation movement was not executed."), str(e)))
                    return

    def on_skewx(self):
        self.report_usage("on_skewx()")

        obj_list = self.collection.get_selected()
        xminlist = []
        yminlist = []

        if not obj_list:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected to Skew/Shear on X axis."))
        else:
            skewxbox = FCInputDialog(title=_("Transform"), text=_("Enter the Angle value:"),
                                     min=-360, max=360, decimals=4,
                                     init_val=float(self.defaults['tools_transform_skew_x']))
            num, ok = skewxbox.get_value()
            if ok:
                # first get a bounding box to fit all
                for obj in obj_list:
                    xmin, ymin, xmax, ymax = obj.bounds()
                    xminlist.append(xmin)
                    yminlist.append(ymin)

                # get the minimum x,y and maximum x,y for all objects selected
                xminimal = min(xminlist)
                yminimal = min(yminlist)

                for obj in obj_list:
                    obj.skew(num, 0, point=(xminimal, yminimal))
                    obj.plot()
                    self.object_changed.emit(obj)
                self.inform.emit('[success] %s' %
                                 _("Skew on X axis done."))

    def on_skewy(self):
        self.report_usage("on_skewy()")

        obj_list = self.collection.get_selected()
        xminlist = []
        yminlist = []

        if not obj_list:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected to Skew/Shear on Y axis."))
        else:
            skewybox = FCInputDialog(title=_("Transform"), text=_("Enter the Angle value:"),
                                     min=-360, max=360, decimals=4,
                                     init_val=float(self.defaults['tools_transform_skew_y']))
            num, ok = skewybox.get_value()
            if ok:
                # first get a bounding box to fit all
                for obj in obj_list:
                    xmin, ymin, xmax, ymax = obj.bounds()
                    xminlist.append(xmin)
                    yminlist.append(ymin)

                # get the minimum x,y and maximum x,y for all objects selected
                xminimal = min(xminlist)
                yminimal = min(yminlist)

                for obj in obj_list:
                    obj.skew(0, num, point=(xminimal, yminimal))
                    obj.plot()
                    self.object_changed.emit(obj)
                self.inform.emit('[success] %s' %
                                 _("Skew on Y axis done."))

    def on_plots_updated(self):
        """
        Callback used to report when the plots have changed.
        Adjust axes and zooms to fit.

        :return: None
        """
        self.plotcanvas.update()           # TODO: Need update canvas?
        self.on_zoom_fit(None)
        self.collection.update_view()
        # self.inform.emit(_("Plots updated ..."))

    # TODO: Rework toolbar 'clear', 'replot' functions
    def on_toolbar_replot(self):
        """
        Callback for toolbar button. Re-plots all objects.

        :return: None
        """

        self.report_usage("on_toolbar_replot")
        self.log.debug("on_toolbar_replot()")

        try:
            self.collection.get_active().read_form()
        except AttributeError:
            self.log.debug("on_toolbar_replot(): AttributeError")
            pass

        self.plot_all()

    def on_row_activated(self, index):
        if index.isValid():
            if index.internalPointer().parent_item != self.collection.root_item:
                self.ui.notebook.setCurrentWidget(self.ui.selected_tab)
        self.collection.on_item_activated(index)

    def grid_status(self):
        if self.ui.grid_snap_btn.isChecked():
            return True
        else:
            return False

    def populate_cmenu_grids(self):
        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().lower()

        self.ui.cmenu_gridmenu.clear()
        sorted_list = sorted(self.defaults["global_grid_context_menu"][str(units)])

        grid_toggle = self.ui.cmenu_gridmenu.addAction(QtGui.QIcon('share/grid32_menu.png'), _("Grid On/Off"))
        grid_toggle.setCheckable(True)
        if self.grid_status() == True:
            grid_toggle.setChecked(True)
        else:
            grid_toggle.setChecked(False)

        self.ui.cmenu_gridmenu.addSeparator()
        for grid in sorted_list:
            action = self.ui.cmenu_gridmenu.addAction(QtGui.QIcon('share/grid32_menu.png'), "%s" % str(grid))
            action.triggered.connect(self.set_grid)

        self.ui.cmenu_gridmenu.addSeparator()
        grid_add = self.ui.cmenu_gridmenu.addAction(QtGui.QIcon('share/plus32.png'), _("Add"))
        grid_delete = self.ui.cmenu_gridmenu.addAction(QtGui.QIcon('share/delete32.png'), _("Delete"))
        grid_add.triggered.connect(self.on_grid_add)
        grid_delete.triggered.connect(self.on_grid_delete)
        grid_toggle.triggered.connect(lambda: self.ui.grid_snap_btn.trigger())

    def set_grid(self):
        self.ui.grid_gap_x_entry.setText(self.sender().text())
        self.ui.grid_gap_y_entry.setText(self.sender().text())

    def on_grid_add(self):
        # ## Current application units in lower Case
        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().lower()

        grid_add_popup = FCInputDialog(title=_("New Grid ..."),
                                       text=_('Enter a Grid Value:'),
                                       min=0.0000, max=99.9999, decimals=4)
        grid_add_popup.setWindowIcon(QtGui.QIcon('share/plus32.png'))

        val, ok = grid_add_popup.get_value()
        if ok:
            if float(val) == 0:
                self.inform.emit('[WARNING_NOTCL] %s' %
                                 _("Please enter a grid value with non-zero value, in Float format."))
                return
            else:
                if val not in self.defaults["global_grid_context_menu"][str(units)]:
                    self.defaults["global_grid_context_menu"][str(units)].append(val)
                    self.inform.emit('[success] %s...' %
                                     _("New Grid added"))
                else:
                    self.inform.emit('[WARNING_NOTCL] %s...' %
                                     _("Grid already exists"))
        else:
            self.inform.emit('[WARNING_NOTCL] %s...' %
                             _("Adding New Grid cancelled"))

    def on_grid_delete(self):
        # ## Current application units in lower Case
        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().lower()

        grid_del_popup = FCInputDialog(title="Delete Grid ...",
                                       text='Enter a Grid Value:',
                                       min=0.0000, max=99.9999, decimals=4)
        grid_del_popup.setWindowIcon(QtGui.QIcon('share/delete32.png'))

        val, ok = grid_del_popup.get_value()
        if ok:
            if float(val) == 0:
                self.inform.emit('[WARNING_NOTCL] %s' %
                                 _("Please enter a grid value with non-zero value, in Float format."))
                return
            else:
                try:
                    self.defaults["global_grid_context_menu"][str(units)].remove(val)
                except ValueError:
                    self.inform.emit('[ERROR_NOTCL]%s...' %
                                     _(" Grid Value does not exist"))
                    return
                self.inform.emit('[success] %s...' %
                                 _("Grid Value deleted"))
        else:
            self.inform.emit('[WARNING_NOTCL] %s...' %
                             _("Delete Grid value cancelled"))

    def on_shortcut_list(self):
        self.report_usage("on_shortcut_list()")

        # add the tab if it was closed
        self.ui.plot_tab_area.addTab(self.ui.shortcuts_tab, _("Key Shortcut List"))

        # delete the absolute and relative position and messages in the infobar
        self.ui.position_label.setText("")
        self.ui.rel_position_label.setText("")

        # Switch plot_area to preferences page
        self.ui.plot_tab_area.setCurrentWidget(self.ui.shortcuts_tab)
        # self.ui.show()

    def on_select_tab(self, name):
        # if the splitter is hidden, display it, else hide it but only if the current widget is the same
        if self.ui.splitter.sizes()[0] == 0:
            self.ui.splitter.setSizes([1, 1])
        else:
            if self.ui.notebook.currentWidget().objectName() == name + '_tab':
                self.ui.splitter.setSizes([0, 1])

        if name == 'project':
            self.ui.notebook.setCurrentWidget(self.ui.project_tab)
        elif name == 'selected':
            self.ui.notebook.setCurrentWidget(self.ui.selected_tab)
        elif name == 'tool':
            self.ui.notebook.setCurrentWidget(self.ui.tool_tab)

    def on_copy_name(self):
        self.report_usage("on_copy_name()")

        obj = self.collection.get_active()
        try:
            name = obj.options["name"]
        except AttributeError:
            log.debug("on_copy_name() --> No object selected to copy it's name")
            self.inform.emit('[WARNING_NOTCL]%s' %
                             _(" No object selected to copy it's name"))
            return

        self.clipboard.setText(name)
        self.inform.emit(_("Name copied on clipboard ..."))

    def on_mouse_click_over_plot(self, event):
        """
        Default actions are:
        :param event: Contains information about the event, like which button
            was clicked, the pixel coordinates and the axes coordinates.
        :return: None
        """
        self.pos = []

        # So it can receive key presses
        self.plotcanvas.native.setFocus()
        # Set the mouse button for panning
        self.plotcanvas.view.camera.pan_button_setting = self.defaults['global_pan_button']

        self.pos_canvas = self.plotcanvas.translate_coords(event.pos)

        if self.grid_status() == True:
            self.pos = self.geo_editor.snap(self.pos_canvas[0], self.pos_canvas[1])
            self.app_cursor.enabled = True
        else:
            self.pos = (self.pos_canvas[0], self.pos_canvas[1])
            self.app_cursor.enabled = False

        try:
            modifiers = QtWidgets.QApplication.keyboardModifiers()

            if event.button == 1:
                # Reset here the relative coordinates so there is a new reference on the click position
                if self.rel_point1 is None:
                    self.rel_point1 = self.pos
                else:
                    self.rel_point2 = copy(self.rel_point1)
                    self.rel_point1 = self.pos

                # If the SHIFT key is pressed when LMB is clicked then the coordinates are copied to clipboard
                if modifiers == QtCore.Qt.ShiftModifier:
                    # do not auto open the Project Tab
                    self.click_noproject = True

                    self.clipboard.setText(self.defaults["global_point_clipboard_format"] % (self.pos[0], self.pos[1]))
                    self.inform.emit('[success] %s' %
                                     _("Coordinates copied to clipboard."))
                    return

            self.on_mouse_move_over_plot(event, origin_click=True)
        except Exception as e:
            App.log.debug("App.on_mouse_click_over_plot() --> Outside plot? --> %s" % str(e))

    def on_double_click_over_plot(self, event):
        self.doubleclick = True

    def on_mouse_move_over_plot(self, event, origin_click=None):
        """
        Callback for the mouse motion event over the plot.

        :param event: Contains information about the event.
        :param origin_click
        :return: None
        """

        # So it can receive key presses
        self.plotcanvas.native.setFocus()
        self.pos_jump = event.pos

        self.ui.popMenu.mouse_is_panning = False

        if not origin_click:
            # if the RMB is clicked and mouse is moving over plot then 'panning_action' is True
            if event.button == 2 and event.is_dragging == 1:
                self.ui.popMenu.mouse_is_panning = True
                return

        if self.rel_point1 is not None:
            try:  # May fail in case mouse not within axes
                pos_canvas = self.plotcanvas.translate_coords(event.pos)
                if self.grid_status() == True:
                    pos = self.geo_editor.snap(pos_canvas[0], pos_canvas[1])
                    self.app_cursor.enabled = True
                    # Update cursor
                    self.app_cursor.set_data(np.asarray([(pos[0], pos[1])]), symbol='++', edge_color='black', size=20)
                else:
                    pos = (pos_canvas[0], pos_canvas[1])
                    self.app_cursor.enabled = False

                self.ui.position_label.setText("&nbsp;&nbsp;&nbsp;&nbsp;<b>X</b>: %.4f&nbsp;&nbsp;   "
                                               "<b>Y</b>: %.4f" % (pos[0], pos[1]))

                dx = pos[0] - self.rel_point1[0]
                dy = pos[1] - self.rel_point1[1]
                self.ui.rel_position_label.setText("<b>Dx</b>: %.4f&nbsp;&nbsp;  <b>Dy</b>: "
                                                   "%.4f&nbsp;&nbsp;&nbsp;&nbsp;" % (dx, dy))
                self.mouse = [pos[0], pos[1]]

                # if the mouse is moved and the LMB is clicked then the action is a selection
                if event.is_dragging == 1 and event.button == 1:
                    self.delete_selection_shape()
                    if dx < 0:
                        self.draw_moving_selection_shape(self.pos, pos, color=self.defaults['global_alt_sel_line'],
                                                     face_color=self.defaults['global_alt_sel_fill'])
                        self.selection_type = False
                    else:
                        self.draw_moving_selection_shape(self.pos, pos)
                        self.selection_type = True

                # hover effect - enabled in Preferences -> General -> GUI Settings
                if self.defaults['global_hover']:
                    for obj in self.collection.get_list():
                        try:
                            # select the object(s) only if it is enabled (plotted)
                            if obj.options['plot']:
                                if obj not in self.collection.get_selected():
                                    poly_obj = Polygon(
                                        [(obj.options['xmin'], obj.options['ymin']),
                                         (obj.options['xmax'], obj.options['ymin']),
                                         (obj.options['xmax'], obj.options['ymax']),
                                         (obj.options['xmin'], obj.options['ymax'])]
                                    )
                                    if Point(pos).within(poly_obj):
                                        if obj.isHovering is False:
                                            obj.isHovering = True
                                            obj.notHovering = True
                                            # create the selection box around the selected object
                                            self.draw_hover_shape(obj, color='#d1e0e0')
                                    else:
                                        if obj.notHovering is True:
                                            obj.notHovering = False
                                            obj.isHovering = False
                                            self.delete_hover_shape()
                        except:
                            # the Exception here will happen if we try to select on screen and we have an
                            # newly (and empty) just created Geometry or Excellon object that do not have the
                            # xmin, xmax, ymin, ymax options.
                            # In this case poly_obj creation (see above) will fail
                            pass

            except:
                self.ui.position_label.setText("")
                self.ui.rel_position_label.setText("")
                self.mouse = None

    def on_mouse_click_release_over_plot(self, event):
        """
        Callback for the mouse click release over plot. This event is generated by the Matplotlib backend
        and has been registered in ''self.__init__()''.
        :param event: contains information about the event.
        :return:
        """
        pos = 0, 0
        pos_canvas = self.plotcanvas.translate_coords(event.pos)
        if self.grid_status() == True:
            pos = self.geo_editor.snap(pos_canvas[0], pos_canvas[1])
        else:
            pos = (pos_canvas[0], pos_canvas[1])

        # if the released mouse button was RMB then test if it was a panning motion or not, if not it was a context
        # canvas menu
        if event.button == 2:  # right click
            if self.ui.popMenu.mouse_is_panning is False:
                self.cursor = QtGui.QCursor()
                self.populate_cmenu_grids()
                self.ui.popMenu.popup(self.cursor.pos())

        # if the released mouse button was LMB then test if we had a right-to-left selection or a left-to-right
        # selection and then select a type of selection ("enclosing" or "touching")
        try:
            if event.button == 1:  # left click
                if self.doubleclick is True:
                    self.doubleclick = False
                    if self.collection.get_selected():
                        self.ui.notebook.setCurrentWidget(self.ui.selected_tab)
                        if self.ui.splitter.sizes()[0] == 0:
                            self.ui.splitter.setSizes([1, 1])

                        # delete the selection shape(S) as it may be in the way
                        self.delete_selection_shape()
                        self.delete_hover_shape()
                else:
                    if self.selection_type is not None:
                        self.selection_area_handler(self.pos, pos, self.selection_type)
                        self.selection_type = None
                    else:
                        key_modifier = QtWidgets.QApplication.keyboardModifiers()

                        if key_modifier == QtCore.Qt.ShiftModifier:
                            mod_key = 'Shift'
                        elif key_modifier == QtCore.Qt.ControlModifier:
                            mod_key = 'Control'
                        else:
                            mod_key = None

                        if mod_key == self.defaults["global_mselect_key"]:
                            # If the CTRL key is pressed when the LMB is clicked then if the object is selected it will
                            # deselect, and if it's not selected then it will be selected
                            # If there is no active command (self.command_active is None) then we check if we clicked
                            # on a object by checking the bounding limits against mouse click position
                            if self.command_active is None:
                                self.select_objects(key='CTRL')
                                self.delete_hover_shape()
                        else:
                            # If there is no active command (self.command_active is None) then we check if we clicked
                            # on a object by checking the bounding limits against mouse click position
                            if self.command_active is None:
                                self.select_objects()
                                self.delete_hover_shape()

        except Exception as e:
            log.warning("Error: %s" % str(e))
            return

    def selection_area_handler(self, start_pos, end_pos, sel_type):
        """
        :param start_pos: mouse position when the selection LMB click was done
        :param end_pos: mouse position when the left mouse button is released
        :param sel_type: if True it's a left to right selection (enclosure), if False it's a 'touch' selection
        :return:
        """
        poly_selection = Polygon([start_pos, (end_pos[0], start_pos[1]), end_pos, (start_pos[0], end_pos[1])])

        self.delete_selection_shape()
        for obj in self.collection.get_list():
            try:
                # select the object(s) only if it is enabled (plotted)
                if obj.options['plot']:
                    poly_obj = Polygon([(obj.options['xmin'], obj.options['ymin']),
                                        (obj.options['xmax'], obj.options['ymin']),
                                        (obj.options['xmax'], obj.options['ymax']),
                                        (obj.options['xmin'], obj.options['ymax'])])
                    if sel_type is True:
                        if poly_obj.within(poly_selection):
                            # create the selection box around the selected object
                            if self.defaults['global_selection_shape'] is True:
                                self.draw_selection_shape(obj)
                            self.collection.set_active(obj.options['name'])
                    else:
                        if poly_selection.intersects(poly_obj):
                            # create the selection box around the selected object
                            if self.defaults['global_selection_shape'] is True:
                                self.draw_selection_shape(obj)
                            self.collection.set_active(obj.options['name'])
            except Exception as e:
                # the Exception here will happen if we try to select on screen and we have an newly (and empty)
                # just created Geometry or Excellon object that do not have the xmin, xmax, ymin, ymax options.
                # In this case poly_obj creation (see above) will fail
                log.debug("App.selection_area_handler() --> %s" % str(e))

    def select_objects(self, key=None):
        # list where we store the overlapped objects under our mouse left click position
        objects_under_the_click_list = []

        # Populate the list with the overlapped objects on the click position
        curr_x, curr_y = self.pos

        for obj in self.all_objects_list:
            if (curr_x >= obj.options['xmin']) and (curr_x <= obj.options['xmax']) and \
                    (curr_y >= obj.options['ymin']) and (curr_y <= obj.options['ymax']):
                if obj.options['name'] not in objects_under_the_click_list:
                    if obj.options['plot']:
                        # add objects to the objects_under_the_click list only if the object is plotted
                        # (active and not disabled)
                        objects_under_the_click_list.append(obj.options['name'])
        try:
            # If there is no element in the overlapped objects list then make everyone inactive
            # because we selected "nothing"
            if not objects_under_the_click_list:
                self.collection.set_all_inactive()

                # delete the possible selection box around a possible selected object
                self.delete_selection_shape()

                # and as a convenience move the focus to the Project tab because Selected tab is now empty but
                # only when working on App
                if self.call_source == 'app':
                    if self.click_noproject is False:
                        self.ui.notebook.setCurrentWidget(self.ui.project_tab)
                    else:
                        # restore auto open the Project Tab
                        self.click_noproject = False

                    # delete any text in the status bar, implicitly the last object name that was selected
                    self.inform.emit("")
                else:
                    self.call_source = 'app'
            else:
                # case when there is only an object under the click and we toggle it
                if len(objects_under_the_click_list) == 1:
                    if self.collection.get_active() is None:
                        self.collection.set_active(objects_under_the_click_list[0])
                        # create the selection box around the selected object
                        curr_sel_obj = self.collection.get_active()
                        if self.defaults['global_selection_shape'] is True:
                            self.draw_selection_shape(curr_sel_obj)

                        # self.inform.emit('[selected] %s: %s selected' %
                        #                  (str(curr_sel_obj.kind).capitalize(), str(curr_sel_obj.options['name'])))
                        if curr_sel_obj.kind == 'gerber':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='green', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'excellon':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='brown', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'cncjob':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='blue', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'geometry':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='red', name=str(curr_sel_obj.options['name'])))

                    elif self.collection.get_active().options['name'] not in objects_under_the_click_list:
                        self.collection.set_all_inactive()
                        self.delete_selection_shape()
                        self.collection.set_active(objects_under_the_click_list[0])
                        # create the selection box around the selected object
                        curr_sel_obj = self.collection.get_active()
                        if self.defaults['global_selection_shape'] is True:
                            self.draw_selection_shape(curr_sel_obj)

                        # self.inform.emit('[selected] %s: %s selected' %
                        #                  (str(curr_sel_obj.kind).capitalize(), str(curr_sel_obj.options['name'])))
                        if curr_sel_obj.kind == 'gerber':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='green', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'excellon':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='brown', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'cncjob':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='blue', name=str(curr_sel_obj.options['name'])))
                        elif curr_sel_obj.kind == 'geometry':
                            self.inform.emit(
                                _('[selected]<span style="color:{color};">{name}</span> selected').format(
                                    color='red', name=str(curr_sel_obj.options['name'])))

                    else:
                        self.collection.set_all_inactive()
                        self.delete_selection_shape()
                        if self.call_source == 'app':
                            # delete any text in the status bar, implicitly the last object name that was selected
                            self.inform.emit("")
                        else:
                            self.call_source = 'app'
                else:
                    # If there is no selected object
                    # make active the first element of the overlapped objects list
                    if self.collection.get_active() is None:
                        self.collection.set_active(objects_under_the_click_list[0])

                    name_sel_obj = self.collection.get_active().options['name']
                    # In case that there is a selected object but it is not in the overlapped object list
                    # make that object inactive and activate the first element in the overlapped object list
                    if name_sel_obj not in objects_under_the_click_list:
                        self.collection.set_inactive(name_sel_obj)
                        name_sel_obj = objects_under_the_click_list[0]
                        self.collection.set_active(name_sel_obj)
                    else:
                        name_sel_obj_idx = objects_under_the_click_list.index(name_sel_obj)
                        self.collection.set_all_inactive()
                        self.collection.set_active(objects_under_the_click_list[(name_sel_obj_idx + 1) %
                                                                                len(objects_under_the_click_list)])

                    curr_sel_obj = self.collection.get_active()
                    # delete the possible selection box around a possible selected object
                    self.delete_selection_shape()
                    # create the selection box around the selected object
                    if self.defaults['global_selection_shape'] is True:
                        self.draw_selection_shape(curr_sel_obj)

                    # self.inform.emit('[selected] %s: %s selected' %
                    #                  (str(curr_sel_obj.kind).capitalize(), str(curr_sel_obj.options['name'])))
                    if curr_sel_obj.kind == 'gerber':
                        self.inform.emit(_('[selected]<span style="color:{color};">{name}</span> selected').format(
                            color='green', name=str(curr_sel_obj.options['name'])))
                    elif curr_sel_obj.kind == 'excellon':
                        self.inform.emit(_('[selected]<span style="color:{color};">{name}</span> selected').format(
                            color='brown', name=str(curr_sel_obj.options['name'])))
                    elif curr_sel_obj.kind == 'cncjob':
                        self.inform.emit(_('[selected]<span style="color:{color};">{name}</span> selected').format(
                            color='blue', name=str(curr_sel_obj.options['name'])))
                    elif curr_sel_obj.kind == 'geometry':
                        self.inform.emit(_('[selected]<span style="color:{color};">{name}</span> selected').format(
                            color='red', name=str(curr_sel_obj.options['name'])))

                    # for obj in self.collection.get_list():
                    #     obj.plot()
                    # curr_sel_obj.plot(color=self.FC_dark_blue, face_color=self.FC_light_blue)

                    # TODO: on selected objects change the object colors and do not draw the selection box
                    # self.plotcanvas.update() # this updates the canvas
        except Exception as e:
            log.error("[ERROR] Something went bad. %s" % str(e))
            return

    def delete_hover_shape(self):
        self.hover_shapes.clear()
        self.hover_shapes.redraw()

    def draw_hover_shape(self, sel_obj, color=None):
        """

        :param sel_obj: the object for which the hover shape must be drawn
        :return:
        """

        pt1 = (float(sel_obj.options['xmin']), float(sel_obj.options['ymin']))
        pt2 = (float(sel_obj.options['xmax']), float(sel_obj.options['ymin']))
        pt3 = (float(sel_obj.options['xmax']), float(sel_obj.options['ymax']))
        pt4 = (float(sel_obj.options['xmin']), float(sel_obj.options['ymax']))

        hover_rect = Polygon([pt1, pt2, pt3, pt4])
        if self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper() == 'MM':
            hover_rect = hover_rect.buffer(-0.1)
            hover_rect = hover_rect.buffer(0.2)

        else:
            hover_rect = hover_rect.buffer(-0.00393)
            hover_rect = hover_rect.buffer(0.00787)

        if color:
            face = Color(color)
            face.alpha = 0.2
            outline = Color(color, alpha=0.8)
        else:
            face = Color(self.defaults['global_sel_fill'])
            face.alpha = 0.2
            outline = self.defaults['global_sel_line']

        self.hover_shapes.add(hover_rect, color=outline, face_color=face, update=True, layer=0, tolerance=None)

    def delete_selection_shape(self):
        self.move_tool.sel_shapes.clear()
        self.move_tool.sel_shapes.redraw()

    def draw_selection_shape(self, sel_obj, color=None):
        """

        :param sel_obj: the object for which the selection shape must be drawn
        :return:
        """

        pt1 = (float(sel_obj.options['xmin']), float(sel_obj.options['ymin']))
        pt2 = (float(sel_obj.options['xmax']), float(sel_obj.options['ymin']))
        pt3 = (float(sel_obj.options['xmax']), float(sel_obj.options['ymax']))
        pt4 = (float(sel_obj.options['xmin']), float(sel_obj.options['ymax']))

        sel_rect = Polygon([pt1, pt2, pt3, pt4])
        if self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper() == 'MM':
            sel_rect = sel_rect.buffer(-0.1)
            sel_rect = sel_rect.buffer(0.2)
        else:
            sel_rect = sel_rect.buffer(-0.00393)
            sel_rect = sel_rect.buffer(0.00787)

        if color:
            face = Color(color, alpha=0.2)
            outline = Color(color, alpha=0.8)
        else:
            face = Color(self.defaults['global_sel_fill'], alpha=0.2)
            outline = Color(self.defaults['global_sel_line'], alpha=0.8)

        self.sel_objects_list.append(self.move_tool.sel_shapes.add(sel_rect,
                                                                   color=outline,
                                                                   face_color=face,
                                                                   update=True,
                                                                   layer=0,
                                                                   tolerance=None))

    def draw_moving_selection_shape(self, old_coords, coords, **kwargs):
        """

        :param old_coords: old coordinates
        :param coords: new coordinates
        :return:
        """

        if 'color' in kwargs:
            color = kwargs['color']
        else:
            color = self.defaults['global_sel_line']

        if 'face_color' in kwargs:
            face_color = kwargs['face_color']
        else:
            face_color = self.defaults['global_sel_fill']

        if 'face_alpha' in kwargs:
            face_alpha = kwargs['face_alpha']
        else:
            face_alpha = 0.3

        x0, y0 = old_coords
        x1, y1 = coords
        pt1 = (x0, y0)
        pt2 = (x1, y0)
        pt3 = (x1, y1)
        pt4 = (x0, y1)
        sel_rect = Polygon([pt1, pt2, pt3, pt4])

        color_t = Color(face_color)
        color_t.alpha = face_alpha
        self.move_tool.sel_shapes.add(sel_rect, color=color, face_color=color_t, update=True,
                                      layer=0, tolerance=None)

    def on_file_new_click(self):
        if self.collection.get_list() and self.should_we_save:
            msgbox = QtWidgets.QMessageBox()
            # msgbox.setText("<B>Save changes ...</B>")
            msgbox.setText(_("There are files/objects opened in FlatCAM.\n"
                             "Creating a New project will delete them.\n"
                             "Do you want to Save the project?"))
            msgbox.setWindowTitle(_("Save changes"))
            msgbox.setWindowIcon(QtGui.QIcon('share/save_as.png'))
            bt_yes = msgbox.addButton(_('Yes'), QtWidgets.QMessageBox.YesRole)
            bt_no = msgbox.addButton(_('No'), QtWidgets.QMessageBox.NoRole)
            bt_cancel = msgbox.addButton(_('Cancel'), QtWidgets.QMessageBox.RejectRole)

            msgbox.setDefaultButton(bt_yes)
            msgbox.exec_()
            response = msgbox.clickedButton()

            if response == bt_yes:
                self.on_file_saveprojectas()
            elif response == bt_cancel:
                return
            elif response == bt_no:
                self.on_file_new()
        else:
            self.on_file_new()
        self.inform.emit('[success] %s...' %
                         _("New Project created"))

    def on_file_new(self, cli=None):
        """
        Callback for menu item File->New. Returns the application to its
        startup state. This method is thread-safe.

        :return: None
        """

        self.report_usage("on_file_new")

        # Remove everything from memory
        App.log.debug("on_file_new()")

        if self.call_source != 'app':
            self.editor2object(cleanup=True)
            # ## EDITOR section
            self.geo_editor = FlatCAMGeoEditor(self, disabled=True)
            self.exc_editor = FlatCAMExcEditor(self)
            self.grb_editor = FlatCAMGrbEditor(self)

        # Clear pool
        self.clear_pool()

        for obj in self.collection.get_list():
            # delete shapes left drawn from mark shape_collections, if any
            if isinstance(obj, FlatCAMGerber):
                try:
                    obj.mark_shapes.enabled = False
                    obj.mark_shapes.clear(update=True)
                except AttributeError:
                    pass

            # also delete annotation shapes, if any
            elif isinstance(obj, FlatCAMCNCjob):
                try:
                    obj.annotation.enabled = False
                    obj.annotation.clear(update=True)
                except AttributeError:
                    pass

        # tcl needs to be reinitialized, otherwise old shell variables etc  remains
        self.init_tcl()

        self.delete_selection_shape()
        self.collection.delete_all()

        self.setup_component_editor()

        # Clear project filename
        self.project_filename = None

        # Load the application defaults
        self.load_defaults(filename='current_defaults')

        # Re-fresh project options
        self.on_options_app2project()

        # Init Tools
        self.init_tools()

        if cli is None:
            # Close any Tabs opened in the Plot Tab Area section
            for index in range(self.ui.plot_tab_area.count()):
                self.ui.plot_tab_area.closeTab(index)
                # for whatever reason previous command does not close the last tab so I do it manually
            self.ui.plot_tab_area.closeTab(0)

            # # And then add again the Plot Area
            self.ui.plot_tab_area.addTab(self.ui.plot_tab, "Plot Area")
            self.ui.plot_tab_area.protectTab(0)

        # take the focus of the Notebook on Project Tab.
        self.ui.notebook.setCurrentWidget(self.ui.project_tab)

        self.set_ui_title(name=_("New Project - Not saved"))

    def obj_properties(self):
        self.report_usage("obj_properties()")

        self.properties_tool.run(toggle=False)

    def on_project_context_save(self):
        obj = self.collection.get_active()
        if type(obj) == FlatCAMGeometry:
            self.on_file_exportdxf()
        elif type(obj) == FlatCAMExcellon:
            self.on_file_saveexcellon()
        elif type(obj) == FlatCAMCNCjob:
            obj.on_exportgcode_button_click()
        elif type(obj) == FlatCAMGerber:
            self.on_file_savegerber()

    def obj_move(self):
        self.report_usage("obj_move()")
        self.move_tool.run(toggle=False)

    def on_fileopengerber(self, checked=None, name=None):
        """
        File menu callback for opening a Gerber.

        :return: None
        """

        self.report_usage("on_fileopengerber")
        App.log.debug("on_fileopengerber()")

        _filter_ = "Gerber Files (*.gbr *.ger *.gtl *.gbl *.gts *.gbs *.gtp *.gbp *.gto *.gbo *.gm1 *.gml *.gm3 *" \
                   ".gko *.cmp *.sol *.stc *.sts *.plc *.pls *.crc *.crs *.tsm *.bsm *.ly2 *.ly15 *.dim *.mil *.grb" \
                   "*.top *.bot *.smt *.smb *.sst *.ssb *.spt *.spb *.pho *.gdo *.art *.gbd *.gb*);;" \
                   "Protel Files (*.gtl *.gbl *.gts *.gbs *.gto *.gbo *.gtp *.gbp *.gml *.gm1 *.gm3 *.gko);;" \
                   "Eagle Files (*.cmp *.sol *.stc *.sts *.plc *.pls *.crc *.crs *.tsm *.bsm *.ly2 *.ly15 *.dim " \
                   "*.mil);;" \
                   "OrCAD Files (*.top *.bot *.smt *.smb *.sst *.ssb *.spt *.spb);;" \
                   "Allegro Files (*.art);;" \
                   "Mentor Files (*.pho *.gdo);;" \
                   "All Files (*.*)"

        if name is None:
            try:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open Gerber"),
                                                                       directory=self.get_last_folder(),
                                                                       filter=_filter_)
            except TypeError:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open Gerber"), filter=_filter_)

            filenames = [str(filename) for filename in filenames]
        else:
            filenames = [name]
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Opening Gerber file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))

        if len(filenames) == 0:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open Gerber cancelled."))
        else:
            for filename in filenames:
                if filename != '':
                    self.worker_task.emit({'fcn': self.open_gerber, 'params': [filename]})

    def on_fileopenexcellon(self, checked=None, name=None):
        """
        File menu callback for opening an Excellon file.

        :return: None
        """

        self.report_usage("on_fileopenexcellon")
        App.log.debug("on_fileopenexcellon()")

        _filter_ = "Excellon Files (*.drl *.txt *.xln *.drd *.tap *.exc *.ncd);;" \
                   "All Files (*.*)"
        if name is None:
            try:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open Excellon"),
                                                                       directory=self.get_last_folder(),
                                                                       filter=_filter_)
            except TypeError:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open Excellon"), filter=_filter_)
            filenames = [str(filename) for filename in filenames]
        else:
            filenames = [str(name)]
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Opening Excellon file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))

        if len(filenames) == 0:
            self.inform.emit('[WARNING_NOTCL]%s' %
                             _(" Open Excellon cancelled."))
        else:
            for filename in filenames:
                if filename != '':
                    self.worker_task.emit({'fcn': self.open_excellon, 'params': [filename]})

    def on_fileopengcode(self, checked=None, name=None):
        """
        File menu call back for opening gcode.

        :return: None
        """

        self.report_usage("on_fileopengcode")
        App.log.debug("on_fileopengcode()")

        # https://bobcadsupport.com/helpdesk/index.php?/Knowledgebase/Article/View/13/5/known-g-code-file-extensions
        _filter_ = "G-Code Files (*.txt *.nc *.ncc *.tap *.gcode *.cnc *.ecs *.fnc *.dnc *.ncg *.gc *.fan *.fgc" \
                   " *.din *.xpi *.hnc *.h *.i *.ncp *.min *.gcd *.rol *.mpr *.ply *.out *.eia *.plt *.sbp *.mpf);;" \
                   "All Files (*.*)"

        if name is None:
            try:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open G-Code"),
                                                                       directory=self.get_last_folder(),
                                                                       filter=_filter_)
            except TypeError:
                filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Open G-Code"), filter=_filter_)

            filenames = [str(filename) for filename in filenames]
        else:
            filenames = [name]
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Opening G-Code file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))

        if len(filenames) == 0:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open G-Code cancelled."))
        else:
            for filename in filenames:
                if filename != '':
                    self.worker_task.emit({'fcn': self.open_gcode, 'params': [filename]})

    def on_file_openproject(self, checked=None):
        """
        File menu callback for opening a project.

        :return: None
        """

        self.report_usage("on_file_openproject")
        App.log.debug("on_file_openproject()")
        _filter_ = "FlatCAM Project (*.FlatPrj);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open Project"),
                                                                 directory=self.get_last_folder(), filter=_filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open Project"), filter=_filter_)

        # The Qt methods above will return a QString which can cause problems later.
        # So far json.dump() will fail to serialize it.
        # TODO: Improve the serialization methods and remove this fix.
        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open Project cancelled."))
        else:
            # self.worker_task.emit({'fcn': self.open_project,
            #                        'params': [filename]})
            # The above was failing because open_project() is not
            # thread safe. The new_project()
            self.open_project(filename)

    def on_file_openconfig(self, checked=None):
        """
        File menu callback for opening a config file.

        :return: None
        """

        self.report_usage("on_file_openconfig")
        App.log.debug("on_file_openconfig()")
        _filter_ = "FlatCAM Config (*.FlatConfig);;FlatCAM Config (*.json);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open Configuration File"),
                                                                 directory=self.data_path, filter=_filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open Configuration File"),
                                                                 filter=_filter_)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open Config cancelled."))
        else:
            self.open_config_file(filename)

    def on_file_exportsvg(self):
        """
        Callback for menu item File->Export SVG.

        :return: None
        """
        self.report_usage("on_file_exportsvg")
        App.log.debug("on_file_exportsvg()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            msg = _("Please Select a Geometry object to export")
            msgbox = QtWidgets.QMessageBox()
            msgbox.setInformativeText(msg)
            bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
            msgbox.setDefaultButton(bt_ok)
            msgbox.exec_()
            return

        # Check for more compatible types and add as required
        if (not isinstance(obj, FlatCAMGeometry)
                and not isinstance(obj, FlatCAMGerber)
                and not isinstance(obj, FlatCAMCNCjob)
                and not isinstance(obj, FlatCAMExcellon)):
            msg = '[ERROR_NOTCL] %s' % \
                  _("Only Geometry, Gerber and CNCJob objects can be used.")
            msgbox = QtWidgets.QMessageBox()
            msgbox.setInformativeText(msg)
            bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
            msgbox.setDefaultButton(bt_ok)
            msgbox.exec_()
            return

        name = obj.options["name"]

        _filter = "SVG File (*.svg);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export SVG"),
                directory=self.get_last_save_folder() + '/' + str(name),
                filter=_filter)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export SVG"), filter=_filter)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL]%s' %
                             _(" Export SVG cancelled."))
            return
        else:
            self.export_svg(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("SVG", filename)
            self.file_saved.emit("SVG", filename)

    def on_file_exportpng(self):
        self.report_usage("on_file_exportpng")
        App.log.debug("on_file_exportpng()")

        self.date = str(datetime.today()).rpartition('.')[0]
        self.date = ''.join(c for c in self.date if c not in ':-')
        self.date = self.date.replace(' ', '_')

        image = _screenshot()
        data = np.asarray(image)
        if not data.ndim == 3 and data.shape[-1] in (3, 4):
            self.inform.emit('[[WARNING_NOTCL]] %s' %
                             _('Data must be a 3D array with last dimension 3 or 4'))
            return

        filter_ = "PNG File (*.png);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export PNG Image"),
                directory=self.get_last_save_folder() + '/png_' + self.date,
                filter=filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export PNG Image"), filter=filter_)

        filename = str(filename)

        if filename == "":
            self.inform.emit(_("Export PNG cancelled."))
            return
        else:
            write_png(filename, data)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("png", filename)
            self.file_saved.emit("png", filename)

    def on_file_savegerber(self):
        """
        Callback for menu item in Project context menu.

        :return: None
        """
        self.report_usage("on_file_savegerber")
        App.log.debug("on_file_savegerber()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected. Please select an Gerber object to export."))
            return

        # Check for more compatible types and add as required
        if not isinstance(obj, FlatCAMGerber):
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Only Gerber objects can be saved as Gerber files..."))
            return

        name = self.collection.get_active().options["name"]

        _filter = "Gerber File (*.GBR);;Gerber File (*.GRB);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption="Save Gerber source file",
                directory=self.get_last_save_folder() + '/' + name,
                filter=_filter)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Save Gerber source file"), filter=_filter)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Save Gerber source file cancelled."))
            return
        else:
            self.save_source_file(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("Gerber", filename)
            self.file_saved.emit("Gerber", filename)

    def on_file_saveexcellon(self):
        """
        Callback for menu item in project context menu.

        :return: None
        """
        self.report_usage("on_file_saveexcellon")
        App.log.debug("on_file_saveexcellon()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected. Please select an Excellon object to export."))
            return

        # Check for more compatible types and add as required
        if not isinstance(obj, FlatCAMExcellon):
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Only Excellon objects can be saved as Excellon files..."))
            return

        name = self.collection.get_active().options["name"]

        _filter = "Excellon File (*.DRL);;Excellon File (*.TXT);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Save Excellon source file"),
                directory=self.get_last_save_folder() + '/' + name,
                filter=_filter)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Save Excellon source file"), filter=_filter)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Saving Excellon source file cancelled."))
            return
        else:
            self.save_source_file(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("Excellon", filename)
            self.file_saved.emit("Excellon", filename)

    def on_file_exportexcellon(self):
        """
        Callback for menu item File->Export->Excellon.

        :return: None
        """
        self.report_usage("on_file_exportexcellon")
        App.log.debug("on_file_exportexcellon()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected. Please Select an Excellon object to export."))
            return

        # Check for more compatible types and add as required
        if not isinstance(obj, FlatCAMExcellon):
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Only Excellon objects can be saved as Excellon files..."))
            return

        name = self.collection.get_active().options["name"]

        _filter = "Excellon File (*.DRL);;Excellon File (*.TXT);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export Excellon"),
                directory=self.get_last_save_folder() + '/' + name,
                filter=_filter)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export Excellon"), filter=_filter)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Export Excellon cancelled."))
            return
        else:
            self.export_excellon(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("Excellon", filename)
            self.file_saved.emit("Excellon", filename)

    def on_file_exportgerber(self):
        """
        Callback for menu item File->Export->Gerber.

        :return: None
        """
        self.report_usage("on_file_exportgerber")
        App.log.debug("on_file_exportgerber()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected. Please Select an Gerber object to export."))
            return

        # Check for more compatible types and add as required
        if not isinstance(obj, FlatCAMGerber):
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed. Only Gerber objects can be saved as Gerber files..."))
            return

        name = self.collection.get_active().options["name"]

        _filter_ = "Gerber File (*.GBR);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export Gerber"),
                directory=self.get_last_save_folder() + '/' + name,
                filter=_filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export Gerber"), filter=_filter_)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Export Gerber cancelled."))
            return
        else:
            self.export_gerber(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("Gerber", filename)
            self.file_saved.emit("Gerber", filename)

    def on_file_exportdxf(self):
        """
                Callback for menu item File->Export DXF.

                :return: None
                """
        self.report_usage("on_file_exportdxf")
        App.log.debug("on_file_exportdxf()")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            msg = _("Please Select a Geometry object to export")
            msgbox = QtWidgets.QMessageBox()
            msgbox.setInformativeText(msg)
            bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
            msgbox.setDefaultButton(bt_ok)
            msgbox.exec_()
            return

        # Check for more compatible types and add as required
        if not isinstance(obj, FlatCAMGeometry):
            msg = '[ERROR_NOTCL] %s' % \
                  _("Only Geometry objects can be used.")
            msgbox = QtWidgets.QMessageBox()
            msgbox.setInformativeText(msg)
            bt_ok = msgbox.addButton(_('Ok'), QtWidgets.QMessageBox.AcceptRole)
            msgbox.setDefaultButton(bt_ok)
            msgbox.exec_()

            return

        name = self.collection.get_active().options["name"]

        _filter_ = "DXF File (*.DXF);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Export DXF"),
                directory=self.get_last_save_folder() + '/' + name,
                filter=_filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Export DXF"),
                                                                 filter=_filter_)

        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Export DXF cancelled."))
            return
        else:
            self.export_dxf(name, filename)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("DXF", filename)
            self.file_saved.emit("DXF", filename)

    def on_file_importsvg(self, type_of_obj):
        """
        Callback for menu item File->Import SVG.
        :param type_of_obj: to import the SVG as Geometry or as Gerber
        :type type_of_obj: str
        :return: None
        """
        self.report_usage("on_file_importsvg")
        App.log.debug("on_file_importsvg()")

        _filter_ = "SVG File (*.svg);;All Files (*.*)"
        try:
            filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Import SVG"),
                                                                   directory=self.get_last_folder(), filter=_filter_)
        except TypeError:
            filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Import SVG"),
                                                                   filter=_filter_)

        if type_of_obj is not "geometry" and type_of_obj is not "gerber":
            type_of_obj = "geometry"

        filenames = [str(filename) for filename in filenames]

        if len(filenames) == 0:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open SVG cancelled."))
        else:
            for filename in filenames:
                if filename != '':
                    self.worker_task.emit({'fcn': self.import_svg,
                                           'params': [filename, type_of_obj]})

    def on_file_importdxf(self, type_of_obj):
        """
        Callback for menu item File->Import DXF.
        :param type_of_obj: to import the DXF as Geometry or as Gerber
        :type type_of_obj: str
        :return: None
        """
        self.report_usage("on_file_importdxf")
        App.log.debug("on_file_importdxf()")

        _filter_ = "DXF File (*.DXF);;All Files (*.*)"
        try:
            filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Import DXF"),
                                                                   directory=self.get_last_folder(),
                                                                   filter=_filter_)
        except TypeError:
            filenames, _f = QtWidgets.QFileDialog.getOpenFileNames(caption=_("Import DXF"),
                                                                   filter=_filter_)

        if type_of_obj is not "geometry" and type_of_obj is not "gerber":
            type_of_obj = "geometry"

        filenames = [str(filename) for filename in filenames]

        if len(filenames) == 0:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open DXF cancelled."))
        else:
            for filename in filenames:
                if filename != '':
                    self.worker_task.emit({'fcn': self.import_dxf,
                                           'params': [filename, type_of_obj]})

    # ###############################################################################################################
    # ### The following section has the functions that are displayed and call the Editor tab CNCJob Tab #############
    # ###############################################################################################################

    def init_code_editor(self, name):
        # Signals section
        # Disconnect the old signals
        try:
            self.ui.buttonOpen.clicked.disconnect()
        except TypeError:
            pass

        try:
            self.ui.buttonSave.clicked.disconnect()
        except TypeError:
            pass

        # add the tab if it was closed
        self.ui.plot_tab_area.addTab(self.ui.cncjob_tab, '%s' % name)
        self.ui.cncjob_tab.setObjectName('cncjob_tab')

        # delete the absolute and relative position and messages in the infobar
        self.ui.position_label.setText("")
        self.ui.rel_position_label.setText("")

        # first clear previous text in text editor (if any)
        self.ui.code_editor.clear()
        self.ui.code_editor.setReadOnly(False)
        self.toggle_codeeditor = True
        self.ui.code_editor.completer_enable = False
        self.ui.buttonRun.hide()

        # make sure to keep a reference to the code editor
        self.reference_code_editor = self.ui.code_editor

        # Switch plot_area to CNCJob tab
        self.ui.plot_tab_area.setCurrentWidget(self.ui.cncjob_tab)

    def on_view_source(self):
        self.inform.emit('%s' %
                         _("Viewing the source code of the selected object."))
        self.proc_container.view.set_busy(_("Loading..."))

        try:
            obj = self.collection.get_active()
        except Exception as e:
            log.debug("App.on_view_source() --> %s" % str(e))
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Select an Gerber or Excellon file to view it's source file."))
            return 'fail'

        if obj.kind == 'gerber':
            flt = "Gerber Files (*.GBR);;All Files (*.*)"
        elif obj.kind == 'excellon':
            flt = "Excellon Files (*.DRL);;All Files (*.*)"
        elif obj.kind == 'cncjob':
            "GCode Files (*.NC);;All Files (*.*)"
        else:
            flt = "All Files (*.*)"

        self.init_code_editor(name=_("Source Editor"))
        self.ui.buttonOpen.clicked.connect(lambda: self.handleOpen(filt=flt))
        self.ui.buttonSave.clicked.connect(lambda: self.handleSaveGCode(filt=flt))

        # then append the text from GCode to the text editor
        if obj.kind == 'cncjob':
            try:
                file = obj.export_gcode(
                    preamble=self.defaults["cncjob_prepend"],
                    postamble=self.defaults["cncjob_append"],
                    to_file=True)
                if file == 'fail':
                    return 'fail'
            except AttributeError:
                self.inform.emit('[WARNING_NOTCL] %s' %
                                 _("There is no selected object for which to see it's source file code."))
                return 'fail'
        else:
            try:
                file = StringIO(obj.source_file)
            except AttributeError:
                self.inform.emit('[WARNING_NOTCL] %s' %
                                 _("There is no selected object for which to see it's source file code."))
                return 'fail'

        self.ui.cncjob_frame.hide()
        try:
            for line in file:
                QtWidgets.QApplication.processEvents()
                proc_line = str(line).strip('\n')
                self.ui.code_editor.append(proc_line)
        except Exception as e:
            log.debug('App.on_view_source() -->%s' % str(e))
            self.inform.emit('[ERROR] %s: %s' %
                             (_('Failed to load the source code for the selected object'), str(e)))
            return

        self.handleTextChanged()
        self.ui.cncjob_frame.show()

        self.ui.code_editor.moveCursor(QtGui.QTextCursor.Start)
        self.proc_container.view.set_idle()
        # self.ui.show()

    def on_toggle_code_editor(self):
        self.report_usage("on_toggle_code_editor()")

        if self.toggle_codeeditor is False:
            self.init_code_editor(name=_("Code Editor"))
            self.ui.buttonOpen.clicked.connect(lambda: self.handleOpen())
            self.ui.buttonSave.clicked.connect(lambda: self.handleSaveGCode())
        else:
            for idx in range(self.ui.plot_tab_area.count()):
                if self.ui.plot_tab_area.widget(idx).objectName() == "cncjob_tab":
                    self.ui.plot_tab_area.closeTab(idx)
                    break
            self.toggle_codeeditor = False

    def on_filenewscript(self):
        flt = "FlatCAM Scripts (*.FlatScript);;All Files (*.*)"
        self.init_code_editor(name=_("Script Editor"))
        self.ui.code_editor.completer_enable = True
        self.ui.code_editor.append(_(
            "#\n"
            "# CREATE A NEW FLATCAM TCL SCRIPT\n"
            "# TCL Tutorial here: https://www.tcl.tk/man/tcl8.5/tutorial/tcltutorial.html\n"
            "#\n\n"
            "# FlatCAM commands list:\n"
            "# AddCircle, AddPolygon, AddPolyline, AddRectangle, AlignDrill, AlignDrillGrid, ClearShell, ClearCopper,\n"
            "# Cncjob, Cutout, Delete, Drillcncjob, ExportGcode, ExportSVG, Exteriors, GeoCutout, GeoUnion, GetNames,\n"
            "# GetSys, ImportSvg, Interiors, Isolate, Follow, JoinExcellon, JoinGeometry, ListSys, MillDrills,\n"
            "# MillSlots, Mirror, New, NewGeometry, Offset, OpenExcellon, OpenGCode, OpenGerber, OpenProject,\n"
            "# Options, Paint, Panelize, Plot, SaveProject, SaveSys, Scale, SetActive, SetSys, Skew, SubtractPoly,\n"
            "# SubtractRectangle, Version, WriteGCode\n"
            "#\n\n"
        ))

        self.ui.buttonOpen.clicked.connect(lambda: self.handleOpen(filt=flt))
        self.ui.buttonSave.clicked.connect(lambda: self.handleSaveGCode(filt=flt))
        self.ui.buttonRun.show()
        try:
            self.ui.buttonRun.clicked.disconnect(self.handleRunCode)
        except TypeError:
            pass
        self.ui.buttonRun.clicked.connect(self.handleRunCode)

        self.handleTextChanged()
        self.ui.code_editor.show()

    def on_fileopenscript(self):
        _filter_ = "TCL script (*.FlatScript);;TCL script (*.TCL);;TCL script (*.TXT);;All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open TCL script"),
                                                                 directory=self.get_last_folder(), filter=_filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Open TCL script"), filter=_filter_)

        # The Qt methods above will return a QString which can cause problems later.
        # So far json.dump() will fail to serialize it.
        # TODO: Improve the serialization methods and remove this fix.
        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Open TCL script cancelled."))
        else:
            self.on_filenewscript()

            try:
                with open(filename, "r") as opened_script:
                    try:
                        for line in opened_script:
                            proc_line = str(line).strip('\n')
                            self.ui.code_editor.append(proc_line)
                    except Exception as e:
                        log.debug('App.on_fileopenscript() -->%s' % str(e))
                        self.inform.emit('[ERROR] %s %s' %
                                         (_('App.on_fileopenscript() -->'), str(e)))
                        return

                    self.ui.code_editor.moveCursor(QtGui.QTextCursor.Start)

                    self.handleTextChanged()
                    # self.ui.show()

            except Exception as e:
                log.debug("App.on_fileopenscript() -> %s" % str(e))

    def on_filerunscript(self, name=None):
        """
                File menu callback for loading and running a TCL script.

                :return: None
                """

        self.report_usage("on_filerunscript")
        App.log.debug("on_file_runscript()")

        if name:
            filename = name
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Executing FlatCAMScript file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))
        else:
            _filter_ = "TCL script (*.FlatScript);;TCL script (*.TCL);;TCL script (*.TXT);;All Files (*.*)"
            try:
                filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Run TCL script"),
                                                                     directory=self.get_last_folder(), filter=_filter_)
            except TypeError:
                filename, _f = QtWidgets.QFileDialog.getOpenFileName(caption=_("Run TCL script"), filter=_filter_)

        # The Qt methods above will return a QString which can cause problems later.
        # So far json.dump() will fail to serialize it.
        # TODO: Improve the serialization methods and remove this fix.
        filename = str(filename)

        if filename == "":
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Run TCL script cancelled."))
        else:
            try:
                with open(filename, "r") as tcl_script:
                    cmd_line_shellfile_content = tcl_script.read()
                    self.shell._sysShell.exec_command(cmd_line_shellfile_content)
            except Exception as e:
                log.debug("App.on_filerunscript() -> %s" % str(e))
                sys.exit(2)

    def on_file_saveproject(self):
        """
        Callback for menu item File->Save Project. Saves the project to
        ``self.project_filename`` or calls ``self.on_file_saveprojectas()``
        if set to None. The project is saved by calling ``self.save_project()``.

        :return: None
        """

        self.report_usage("on_file_saveproject")

        if self.project_filename is None:
            self.on_file_saveprojectas()
        else:
            self.worker_task.emit({'fcn': self.save_project,
                                   'params': [self.project_filename]})
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("project", self.project_filename)
            self.file_saved.emit("project", self.project_filename)

        self.set_ui_title(name=self.project_filename)

        self.should_we_save = False

    def on_file_saveprojectas(self, make_copy=False, use_thread=True, quit_action=False):
        """
        Callback for menu item File->Save Project As... Opens a file
        chooser and saves the project to the given file via
        ``self.save_project()``.

        :param make_copy if to be create a copy of the project; boolean
        :param use_thread: if to be run in a separate thread; boolean
        :param quit_action: if to be followed by quiting the application; boolean
        :return: None
        """

        self.report_usage("on_file_saveprojectas")

        self.date = str(datetime.today()).rpartition('.')[0]
        self.date = ''.join(c for c in self.date if c not in ':-')
        self.date = self.date.replace(' ', '_')

        filter_ = "FlatCAM Project (*.FlatPrj);; All Files (*.*)"
        try:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(
                caption=_("Save Project As ..."),
                directory=_('{l_save}/Project_{date}').format(l_save=str(self.get_last_save_folder()), date=self.date),
                filter=filter_)
        except TypeError:
            filename, _f = QtWidgets.QFileDialog.getSaveFileName(caption=_("Save Project As ..."), filter=filter_)

        filename = str(filename)

        if filename == '':
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Save Project cancelled."))
            return

        try:
            f = open(filename, 'r')
            f.close()
        except IOError:
            pass

        if use_thread is True:
            self.worker_task.emit({'fcn': self.save_project,
                                   'params': [filename, quit_action]})
        else:
            self.save_project(filename, quit_action)

        # self.save_project(filename)
        if self.defaults["global_open_style"] is False:
            self.file_opened.emit("project", filename)
        self.file_saved.emit("project", filename)

        if not make_copy:
            self.project_filename = filename

        self.set_ui_title(name=self.project_filename)
        self.should_we_save = False

    def export_svg(self, obj_name, filename, scale_factor=0.00):
        """
        Exports a Geometry Object to an SVG file.

        :param obj_name: the name of the FlatCAM object to be saved as SVG
        :param filename: Path to the SVG file to save to.
        :param scale_factor: factor by which to change/scale the thickness of the features
        :return:
        """
        self.report_usage("export_svg()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_svg()")

        try:
            obj = self.collection.get_by_name(str(obj_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % obj_name

        with self.proc_container.new(_("Exporting SVG")) as proc:
            exported_svg = obj.export_svg(scale_factor=scale_factor)

            # Determine bounding area for svg export
            bounds = obj.bounds()
            size = obj.size()

            # Convert everything to strings for use in the xml doc
            svgwidth = str(size[0])
            svgheight = str(size[1])
            minx = str(bounds[0])
            miny = str(bounds[1] - size[1])
            uom = obj.units.lower()

            # Add a SVG Header and footer to the svg output from shapely
            # The transform flips the Y Axis so that everything renders
            # properly within svg apps such as inkscape
            svg_header = '<svg xmlns="http://www.w3.org/2000/svg" ' \
                         'version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" '
            svg_header += 'width="' + svgwidth + uom + '" '
            svg_header += 'height="' + svgheight + uom + '" '
            svg_header += 'viewBox="' + minx + ' ' + miny + ' ' + svgwidth + ' ' + svgheight + '">'
            svg_header += '<g transform="scale(1,-1)">'
            svg_footer = '</g> </svg>'
            svg_elem = svg_header + exported_svg + svg_footer

            # Parse the xml through a xml parser just to add line feeds
            # and to make it look more pretty for the output
            svgcode = parse_xml_string(svg_elem)
            try:
                with open(filename, 'w') as fp:
                    fp.write(svgcode.toprettyxml())
            except PermissionError:
                self.inform.emit('[WARNING] %s' %
                                 _("Permission denied, saving not possible.\n"
                                   "Most likely another app is holding the file open and not accessible."))
                return 'fail'

            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("SVG", filename)
            self.file_saved.emit("SVG", filename)
            self.inform.emit('[success] %s: %s' %
                             (_("SVG file exported to"), filename))

    def export_svg_negative(self, obj_name, box_name, filename, boundary, scale_factor=0.00, use_thread=True):
        """
        Exports a Geometry Object to an SVG file in negative.

        :param obj_name: the name of the FlatCAM object to be saved as SVG
        :param box_name: the name of the FlatCAM object to be used as delimitation of the content to be saved
        :param filename: Path to the SVG file to save to.
        :param boundary: thickness of a black border to surround all the features
        :param scale_factor: factor by which to change/scale the thickness of the features
        :param use_thread: if to be run in a separate thread; boolean
        :return:
        """
        self.report_usage("export_negative()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_svg() negative")

        try:
            obj = self.collection.get_by_name(str(obj_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % obj_name

        try:
            box = self.collection.get_by_name(str(box_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % box_name

        if box is None:
            self.inform.emit('[WARNING_NOTCL] %s: %s' %
                             (_("No object Box. Using instead"), obj))
            box = obj

        def make_negative_film():
            exported_svg = obj.export_svg(scale_factor=scale_factor)

            # Determine bounding area for svg export
            bounds = box.bounds()
            size = box.size()

            uom = obj.units.lower()

            # Convert everything to strings for use in the xml doc
            svgwidth = str(size[0] + (2 * boundary))
            svgheight = str(size[1] + (2 * boundary))
            minx = str(bounds[0] - boundary)
            miny = str(bounds[1] + boundary + size[1])
            miny_rect = str(bounds[1] - boundary)

            # Add a SVG Header and footer to the svg output from shapely
            # The transform flips the Y Axis so that everything renders
            # properly within svg apps such as inkscape
            svg_header = '<svg xmlns="http://www.w3.org/2000/svg" ' \
                         'version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" '
            svg_header += 'width="' + svgwidth + uom + '" '
            svg_header += 'height="' + svgheight + uom + '" '
            svg_header += 'viewBox="' + minx + ' -' + miny + ' ' + svgwidth + ' ' + svgheight + '" '
            svg_header += '>'
            svg_header += '<g transform="scale(1,-1)">'
            svg_footer = '</g> </svg>'

            # Change the attributes of the exported SVG
            # We don't need stroke-width - wrong, we do when we have lines with certain width
            # We set opacity to maximum
            # We set the color to WHITE
            root = ET.fromstring(exported_svg)
            for child in root:
                child.set('fill', '#FFFFFF')
                child.set('opacity', '1.0')
                child.set('stroke', '#FFFFFF')

            # first_svg_elem = 'rect x="' + minx + '" ' + 'y="' + miny_rect + '" '
            # first_svg_elem += 'width="' + svgwidth + '" ' + 'height="' + svgheight + '" '
            # first_svg_elem += 'fill="#000000" opacity="1.0" stroke-width="0.0"'

            first_svg_elem_tag = 'rect'
            first_svg_elem_attribs = {
                'x': minx,
                'y': miny_rect,
                'width': svgwidth,
                'height': svgheight,
                'id': 'neg_rect',
                'style': 'fill:#000000;opacity:1.0;stroke-width:0.0'
            }

            root.insert(0, ET.Element(first_svg_elem_tag, first_svg_elem_attribs))
            exported_svg = ET.tostring(root)

            svg_elem = svg_header + str(exported_svg) + svg_footer

            # Parse the xml through a xml parser just to add line feeds
            # and to make it look more pretty for the output
            doc = parse_xml_string(svg_elem)
            try:
                with open(filename, 'w') as fp:
                    fp.write(doc.toprettyxml())
            except PermissionError:
                self.inform.emit('[WARNING] %s' %
                                 _("Permission denied, saving not possible.\n"
                                   "Most likely another app is holding the file open and not accessible."))
                return 'fail'

            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("SVG", filename)
            self.file_saved.emit("SVG", filename)
            self.inform.emit('[success] %s: %s' %
                             (_("SVG file exported to"), filename))

        if use_thread is True:
            proc = self.proc_container.new(_("Generating Film ... Please wait."))

            def job_thread_film(app_obj):
                try:
                    make_negative_film()
                except Exception as e:
                    proc.done()
                    return
                proc.done()

            self.worker_task.emit({'fcn': job_thread_film, 'params': [self]})
        else:
            make_negative_film()

    def export_svg_positive(self, obj_name, box_name, filename, scale_factor=0.00, use_thread=True):
        """
        Exports a Geometry Object to an SVG file in positive black.

        :param obj_name: the name of the FlatCAM object to be saved as SVG
        :param box_name: the name of the FlatCAM object to be used as delimitation of the content to be saved
        :param filename: Path to the SVG file to save to.
        :param scale_factor: factor by which to change/scale the thickness of the features
        :param use_thread: if to be run in a separate thread; boolean
        :return:
        """
        self.report_usage("export_svg_positive()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_svg() black")

        try:
            obj = self.collection.get_by_name(str(obj_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % obj_name

        try:
            box = self.collection.get_by_name(str(box_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % box_name

        if box is None:
            self.inform.emit('[WARNING_NOTCL] %s: %s' %
                             (_("No object Box. Using instead"), obj))
            box = obj

        def make_positive_film():
            exported_svg = obj.export_svg(scale_factor=scale_factor)

            self.progress.emit(40)

            # Change the attributes of the exported SVG
            # We don't need stroke-width
            # We set opacity to maximum
            # We set the colour to WHITE
            root = ET.fromstring(exported_svg)
            for child in root:
                child.set('fill', str(self.defaults['tools_film_color']))
                child.set('opacity', '1.0')
                child.set('stroke', str(self.defaults['tools_film_color']))

            exported_svg = ET.tostring(root)

            # Determine bounding area for svg export
            bounds = box.bounds()
            size = box.size()

            # This contain the measure units
            uom = obj.units.lower()

            # Define a boundary around SVG of about 1.0mm (~39mils)
            if uom in "mm":
                boundary = 1.0
            else:
                boundary = 0.0393701

            self.progress.emit(80)

            # Convert everything to strings for use in the xml doc
            svgwidth = str(size[0] + (2 * boundary))
            svgheight = str(size[1] + (2 * boundary))
            minx = str(bounds[0] - boundary)
            miny = str(bounds[1] + boundary + size[1])

            self.log.debug(minx)
            self.log.debug(miny)

            # Add a SVG Header and footer to the svg output from shapely
            # The transform flips the Y Axis so that everything renders
            # properly within svg apps such as inkscape
            svg_header = '<svg xmlns="http://www.w3.org/2000/svg" ' \
                         'version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" '
            svg_header += 'width="' + svgwidth + uom + '" '
            svg_header += 'height="' + svgheight + uom + '" '
            svg_header += 'viewBox="' + minx + ' -' + miny + ' ' + svgwidth + ' ' + svgheight + '" '
            svg_header += '>'
            svg_header += '<g transform="scale(1,-1)">'
            svg_footer = '</g> </svg>'

            svg_elem = str(svg_header) + str(exported_svg) + str(svg_footer)

            self.progress.emit(90)

            # Parse the xml through a xml parser just to add line feeds
            # and to make it look more pretty for the output
            doc = parse_xml_string(svg_elem)
            try:
                with open(filename, 'w') as fp:
                    fp.write(doc.toprettyxml())
            except PermissionError:
                self.inform.emit('[WARNING] %s' %
                                 _("Permission denied, saving not possible.\n"
                                   "Most likely another app is holding the file open and not accessible."))
                return 'fail'

            self.progress.emit(100)
            if self.defaults["global_open_style"] is False:
                self.file_opened.emit("SVG", filename)
            self.file_saved.emit("SVG", filename)
            self.inform.emit('[success] %s: %s' %
                             (_("SVG file exported to"), filename))

        if use_thread is True:
            proc = self.proc_container.new(_("Generating Film ... Please wait."))

            def job_thread_film(app_obj):
                try:
                    make_positive_film()
                except Exception as e:
                    proc.done()
                    return
                proc.done()

            self.worker_task.emit({'fcn': job_thread_film, 'params': [self]})
        else:
            make_positive_film()

    def save_source_file(self, obj_name, filename, use_thread=True):
        """
        Exports a FlatCAM Object to an Gerber/Excellon file.

        :param obj_name: the name of the FlatCAM object for which to save it's embedded source file
        :param filename: Path to the Gerber file to save to.
        :param use_thread: if to be run in a separate thread
        :return:
        """
        self.report_usage("save source file()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("save source file()")

        obj = self.collection.get_by_name(obj_name)

        file_string = StringIO(obj.source_file)
        time_string = "{:%A, %d %B %Y at %H:%M}".format(datetime.now())

        try:
            with open(filename, 'w') as file:
                file.writelines('G04*\n')
                file.writelines('G04 %s (RE)GENERATED BY FLATCAM v%s - www.flatcam.org - Version Date: %s*\n' %
                                (obj.kind.upper(), str(self.version), str(self.version_date)))
                file.writelines('G04 Filename: %s*\n' % str(obj_name))
                file.writelines('G04 Created on : %s*\n' % time_string)

                for line in file_string:
                    file.writelines(line)
        except PermissionError:
            self.inform.emit('[WARNING] %s' %
                             _("Permission denied, saving not possible.\n"
                               "Most likely another app is holding the file open and not accessible."))
            return 'fail'

    def export_excellon(self, obj_name, filename, local_use=None, use_thread=True):
        """
        Exports a Excellon Object to an Excellon file.

        :param obj_name: the name of the FlatCAM object to be saved as Excellon
        :param filename: Path to the Excellon file to save to.
        :param use_thread: if to be run in a separate thread
        :return:
        """
        self.report_usage("export_excellon()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_excellon()")

        format_exc = ';FILE_FORMAT=%d:%d\n' % (self.defaults["excellon_exp_integer"],
                                               self.defaults["excellon_exp_decimals"]
                                               )
        units = ''

        if local_use is None:
            try:
                obj = self.collection.get_by_name(str(obj_name))
            except:
                # TODO: The return behavior has not been established... should raise exception?
                return "Could not retrieve object: %s" % obj_name
        else:
            obj = local_use

        # updated units
        eunits = self.defaults["excellon_exp_units"]
        ewhole = self.defaults["excellon_exp_integer"]
        efract = self.defaults["excellon_exp_decimals"]
        ezeros = self.defaults["excellon_exp_zeros"]
        eformat = self.defaults["excellon_exp_format"]
        slot_type = self.defaults["excellon_exp_slot_type"]

        fc_units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()
        if fc_units == 'MM':
            factor = 1 if eunits == 'METRIC' else 0.03937
        else:
            factor = 25.4 if eunits == 'METRIC' else 1

        def make_excellon():
            try:
                time_str = "{:%A, %d %B %Y at %H:%M}".format(datetime.now())

                header = 'M48\n'
                header += ';EXCELLON GENERATED BY FLATCAM v%s - www.flatcam.org - Version Date: %s\n' % \
                          (str(self.version), str(self.version_date))

                header += ';Filename: %s' % str(obj_name) + '\n'
                header += ';Created on : %s' % time_str + '\n'

                if eformat == 'dec':
                    has_slots, excellon_code = obj.export_excellon(ewhole, efract, factor=factor, slot_type=slot_type)
                    header += eunits + '\n'

                    for tool in obj.tools:
                        if eunits == 'METRIC':
                            header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                          tool=str(tool),
                                                                          dec=2)
                        else:
                            header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                          tool=str(tool),
                                                                          dec=4)
                else:
                    if ezeros == 'LZ':
                        has_slots, excellon_code = obj.export_excellon(ewhole, efract,
                                                                       form='ndec', e_zeros='LZ', factor=factor,
                                                                       slot_type=slot_type)
                        header += '%s,%s\n' % (eunits, 'LZ')
                        header += format_exc

                        for tool in obj.tools:
                            if eunits == 'METRIC':
                                header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                              tool=str(tool),
                                                                              dec=2)
                            else:
                                header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                              tool=str(tool),
                                                                              dec=4)
                    else:
                        has_slots, excellon_code = obj.export_excellon(ewhole, efract,
                                                                       form='ndec', e_zeros='TZ', factor=factor,
                                                                       slot_type=slot_type)
                        header += '%s,%s\n' % (eunits, 'TZ')
                        header += format_exc

                        for tool in obj.tools:
                            if eunits == 'METRIC':
                                header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                              tool=str(tool),
                                                                              dec=2)
                            else:
                                header += "T{tool}F00S00C{:.{dec}f}\n".format(float(obj.tools[tool]['C']) * factor,
                                                                              tool=str(tool),
                                                                              dec=4)
                header += '%\n'
                footer = 'M30\n'

                exported_excellon = header
                exported_excellon += excellon_code
                exported_excellon += footer

                if local_use is None:
                    try:
                        with open(filename, 'w') as fp:
                            fp.write(exported_excellon)
                    except PermissionError:
                        self.inform.emit('[WARNING] %s' %
                                         _("Permission denied, saving not possible.\n"
                                           "Most likely another app is holding the file open and not accessible."))
                        return 'fail'

                    if self.defaults["global_open_style"] is False:
                        self.file_opened.emit("Excellon", filename)
                    self.file_saved.emit("Excellon", filename)
                    self.inform.emit('[success] %s: %s' %
                                     (_("Excellon file exported to"), filename))
                else:
                    return exported_excellon
            except Exception as e:
                log.debug("App.export_excellon.make_excellon() --> %s" % str(e))
                return 'fail'

        if use_thread is True:

            with self.proc_container.new(_("Exporting Excellon")) as proc:

                def job_thread_exc(app_obj):
                    ret = make_excellon()
                    if ret == 'fail':
                        self.inform.emit('[ERROR_NOTCL] %s' %
                                         _('Could not export Excellon file.'))
                        return

                self.worker_task.emit({'fcn': job_thread_exc, 'params': [self]})
        else:
            ret = make_excellon()
            if ret == 'fail':
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _('Could not export Excellon file.'))
                return 'fail'
            if local_use is not None:
                return ret

    def export_gerber(self, obj_name, filename, local_use=None, use_thread=True):
        """
        Exports a Gerber Object to an Gerber file.

        :param obj_name: the name of the FlatCAM object to be saved as Gerber
        :param filename: Path to the Gerber file to save to.
        :param local_use: if the Gerber code is to be saved to a file (None) or used within FlatCAM.
        When not None, the value will be the actual Gerber object for which to create the Gerber code
        :param use_thread: if to be run in a separate thread
        :return:
        """
        self.report_usage("export_gerber()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_gerber()")

        if local_use is None:
            try:
                obj = self.collection.get_by_name(str(obj_name))
            except:
                # TODO: The return behavior has not been established... should raise exception?
                return "Could not retrieve object: %s" % obj_name
        else:
            obj = local_use

        # updated units
        gunits = self.defaults["gerber_exp_units"]
        gwhole = self.defaults["gerber_exp_integer"]
        gfract = self.defaults["gerber_exp_decimals"]
        gzeros = self.defaults["gerber_exp_zeros"]

        fc_units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()
        if fc_units == 'MM':
            factor = 1 if gunits == 'MM' else 0.03937
        else:
            factor = 25.4 if gunits == 'MM' else 1

        def make_gerber():
            try:
                time_str = "{:%A, %d %B %Y at %H:%M}".format(datetime.now())

                header = 'G04*\n'
                header += 'G04 RS-274X GERBER GENERATED BY FLATCAM v%s - www.flatcam.org - Version Date: %s*\n' % \
                          (str(self.version), str(self.version_date))

                header += 'G04 Filename: %s*' % str(obj_name) + '\n'
                header += 'G04 Created on : %s*' % time_str + '\n'
                header += '%%FS%sAX%s%sY%s%s*%%\n' % (gzeros, gwhole, gfract, gwhole, gfract)
                header += "%MO{units}*%\n".format(units=gunits)

                for apid in obj.apertures:
                    if obj.apertures[apid]['type'] == 'C':
                        header += "%ADD{apid}{type},{size}*%\n".format(
                            apid=str(apid),
                            type='C',
                            size=(factor * obj.apertures[apid]['size'])
                        )
                    elif obj.apertures[apid]['type'] == 'R':
                        header += "%ADD{apid}{type},{width}X{height}*%\n".format(
                            apid=str(apid),
                            type='R',
                            width=(factor * obj.apertures[apid]['width']),
                            height=(factor * obj.apertures[apid]['height'])
                        )
                    elif obj.apertures[apid]['type'] == 'O':
                        header += "%ADD{apid}{type},{width}X{height}*%\n".format(
                            apid=str(apid),
                            type='O',
                            width=(factor * obj.apertures[apid]['width']),
                            height=(factor * obj.apertures[apid]['height'])
                        )

                header += '\n'

                # obsolete units but some software may need it
                if gunits == 'IN':
                    header += 'G70*\n'
                else:
                    header += 'G71*\n'

                # Absolute Mode
                header += 'G90*\n'

                header += 'G01*\n'
                # positive polarity
                header += '%LPD*%\n'

                footer = 'M02*\n'

                gerber_code = obj.export_gerber(gwhole, gfract, g_zeros=gzeros, factor=factor)

                exported_gerber = header
                exported_gerber += gerber_code
                exported_gerber += footer

                if local_use is None:
                    try:
                        with open(filename, 'w') as fp:
                            fp.write(exported_gerber)
                    except PermissionError:
                        self.inform.emit('[WARNING] %s' %
                                         _("Permission denied, saving not possible.\n"
                                           "Most likely another app is holding the file open and not accessible."))
                        return 'fail'

                    if self.defaults["global_open_style"] is False:
                        self.file_opened.emit("Gerber", filename)
                    self.file_saved.emit("Gerber", filename)
                    self.inform.emit('[success] %s: %s' %
                                     (_("Gerber file exported to"), filename))
                else:
                    return exported_gerber
            except Exception as e:
                log.debug("App.export_gerber.make_gerber() --> %s" % str(e))
                return 'fail'

        if use_thread is True:
            with self.proc_container.new(_("Exporting Gerber")) as proc:

                def job_thread_grb(app_obj):
                    ret = make_gerber()
                    if ret == 'fail':
                        self.inform.emit('[ERROR_NOTCL] %s' %
                                         _('Could not export Gerber file.'))
                        return

                self.worker_task.emit({'fcn': job_thread_grb, 'params': [self]})
        else:
            ret = make_gerber()
            if ret == 'fail':
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _('Could not export Gerber file.'))
                return 'fail'
            if local_use is not None:
                return ret

    def export_dxf(self, obj_name, filename, use_thread=True):
        """
        Exports a Geometry Object to an DXF file.

        :param obj_name: the name of the FlatCAM object to be saved as DXF
        :param filename: Path to the DXF file to save to.
        :param use_thread: if to be run in a separate thread
        :return:
        """
        self.report_usage("export_dxf()")

        if filename is None:
            filename = self.defaults["global_last_save_folder"]

        self.log.debug("export_dxf()")

        format_exc = ''
        units = ''

        try:
            obj = self.collection.get_by_name(str(obj_name))
        except:
            # TODO: The return behavior has not been established... should raise exception?
            return "Could not retrieve object: %s" % obj_name

        # updated units
        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()
        if units == 'IN' or units == 'INCH':
            units = 'INCH'
        elif units == 'MM' or units == 'METIRC':
            units ='METRIC'

        def make_dxf():
            try:
                dxf_code = obj.export_dxf()
                dxf_code.saveas(filename)
                if self.defaults["global_open_style"] is False:
                    self.file_opened.emit("DXF", filename)
                self.file_saved.emit("DXF", filename)
                self.inform.emit('[success] %s: %s' %
                                 (_("DXF file exported to"), filename))
            except:
                return 'fail'

        if use_thread is True:

            with self.proc_container.new(_("Exporting DXF")) as proc:

                def job_thread_exc(app_obj):
                    ret = make_dxf()
                    if ret == 'fail':
                        app_obj.inform.emit('[WARNING_NOTCL] %s' %
                                            _('Could not export DXF file.'))
                        return

                self.worker_task.emit({'fcn': job_thread_exc, 'params': [self]})
        else:
            ret = make_dxf()
            if ret == 'fail':
                self.inform.emit('[WARNING_NOTCL] %s' %
                                 _('Could not export DXF file.'))
                return

    def import_svg(self, filename, geo_type='geometry', outname=None):
        """
        Adds a new Geometry Object to the projects and populates
        it with shapes extracted from the SVG file.

        :param filename: Path to the SVG file.
        :param outname:
        :return:
        """
        self.report_usage("import_svg()")

        obj_type = ""
        if geo_type is None or geo_type == "geometry":
            obj_type = "geometry"
        elif geo_type == "gerber":
            obj_type = geo_type
        else:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Not supported type is picked as parameter. "
                             "Only Geometry and Gerber are supported"))
            return

        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()

        def obj_init(geo_obj, app_obj):
            geo_obj.import_svg(filename, obj_type, units=units)
            geo_obj.multigeo = False

        with self.proc_container.new(_("Importing SVG")) as proc:

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]

            self.new_object(obj_type, name, obj_init, autoselected=False)
            self.progress.emit(20)
            # Register recent file
            self.file_opened.emit("svg", filename)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))
            self.progress.emit(100)

    def import_dxf(self, filename, geo_type='geometry', outname=None):
        """
        Adds a new Geometry Object to the projects and populates
        it with shapes extracted from the DXF file.

        :param filename: Path to the DXF file.
        :param outname:
        :type putname: str
        :return:
        """
        self.report_usage("import_dxf()")

        obj_type = ""
        if geo_type is None or geo_type == "geometry":
            obj_type = "geometry"
        elif geo_type == "gerber":
            obj_type = geo_type
        else:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Not supported type is picked as parameter. "
                             "Only Geometry and Gerber are supported"))
            return

        units = self.ui.general_defaults_form.general_app_group.units_radio.get_value().upper()

        def obj_init(geo_obj, app_obj):
            geo_obj.import_dxf(filename, obj_type, units=units)
            geo_obj.multigeo = False

        with self.proc_container.new(_("Importing DXF")) as proc:

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]

            self.new_object(obj_type, name, obj_init, autoselected=False)
            self.progress.emit(20)
            # Register recent file
            self.file_opened.emit("dxf", filename)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))
            self.progress.emit(100)

    def import_image(self, filename, o_type='gerber', dpi=96, mode='black', mask=[250, 250, 250, 250], outname=None):
        """
        Adds a new Geometry Object to the projects and populates
        it with shapes extracted from the SVG file.

        :param filename: Path to the SVG file.
        :param o_type: type of FlatCAM objeect
        :param dpi: dot per inch
        :param mode: black or color
        :param mask: dictate the level of detail
        :param outname: name for the resulting file
        :return:
        """
        self.report_usage("import_image()")

        if o_type is None or o_type == "geometry":
            obj_type = "geometry"
        elif o_type == "gerber":
            obj_type = o_type
        else:
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Not supported type is picked as parameter. "
                               "Only Geometry and Gerber are supported"))
            return

        def obj_init(geo_obj, app_obj):
            geo_obj.import_image(filename, units=units, dpi=dpi, mode=mode, mask=mask)
            geo_obj.multigeo = False

        with self.proc_container.new(_("Importing Image")) as proc:

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]
            units = self.ui.general_defaults_form.general_app_group.units_radio.get_value()

            self.new_object(obj_type, name, obj_init)
            self.progress.emit(20)
            # Register recent file
            self.file_opened.emit("image", filename)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))
            self.progress.emit(100)

    def open_gerber(self, filename, outname=None):
        """
        Opens a Gerber file, parses it and creates a new object for
        it in the program. Thread-safe.

        :param outname: Name of the resulting object. None causes the
            name to be that of the file.
        :param filename: Gerber file filename
        :type filename: str
        :param follow: If true, the parser will not create polygons, just lines
            following the gerber path.
        :type follow: bool
        :return: None
        """

        # How the object should be initialized
        def obj_init(gerber_obj, app_obj):

            assert isinstance(gerber_obj, FlatCAMGerber), \
                "Expected to initialize a FlatCAMGerber but got %s" % type(gerber_obj)

            # Opening the file happens here
            self.progress.emit(30)
            try:
                gerber_obj.parse_file(filename)
            except IOError:
                app_obj.inform.emit('[ERROR_NOTCL] %s: %s' %
                                    (_("Failed to open file"), filename))
                app_obj.progress.emit(0)
                return "fail"
            except ParseError as err:
                app_obj.inform.emit('[ERROR_NOTCL] %s: %s. %s' %
                                    (_("Failed to parse file"), filename, str(err)))
                app_obj.progress.emit(0)
                self.log.error(str(err))
                return "fail"
            except Exception as e:
                log.debug("App.open_gerber() --> %s" % str(e))
                msg = '[ERROR] %s' % \
                      _("An internal error has occurred. See shell.\n")
                msg += traceback.format_exc()
                app_obj.inform.emit(msg)
                return "fail"

            if gerber_obj.is_empty():
                # app_obj.inform.emit("[ERROR] No geometry found in file: " + filename)
                # self.collection.set_active(gerber_obj.options["name"])
                # self.collection.delete_active()
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Object is not Gerber file or empty. Aborting object creation."))
                return "fail"

            # Further parsing
            self.progress.emit(70)  # TODO: Note the mixture of self and app_obj used here

        App.log.debug("open_gerber()")

        with self.proc_container.new(_("Opening Gerber")) as proc:

            self.progress.emit(10)

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]

            # # ## Object creation # ##
            ret = self.new_object("gerber", name, obj_init, autoselected=False)
            if ret == 'fail':
                self.inform.emit('[ERROR_NOTCL]%s' %
                                 _(' Open Gerber failed. Probable not a Gerber file.'))
                return

            # Register recent file
            self.file_opened.emit("gerber", filename)

            self.progress.emit(100)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))

    def open_excellon(self, filename, outname=None, plot=True):
        """
        Opens an Excellon file, parses it and creates a new object for
        it in the program. Thread-safe.

        :param outname: Name of the resulting object. None causes the
            name to be that of the file.
        :param filename: Excellon file filename
        :type filename: str
        :return: None
        """

        App.log.debug("open_excellon()")

        # How the object should be initialized
        def obj_init(excellon_obj, app_obj):
            # self.progress.emit(20)

            try:
                ret = excellon_obj.parse_file(filename=filename)
                if ret == "fail":
                    log.debug("Excellon parsing failed.")
                    self.inform.emit('[ERROR_NOTCL] %s' %
                                     _("This is not Excellon file."))
                    return "fail"
            except IOError:
                app_obj.inform.emit('[ERROR_NOTCL] %s: %s' %
                                    (_("Cannot open file"), filename))
                log.debug("Could not open Excellon object.")
                self.progress.emit(0)  # TODO: self and app_bjj mixed
                return "fail"
            except:
                msg = '[ERROR_NOTCL] %s' % \
                      _("An internal error has occurred. See shell.\n")
                msg += traceback.format_exc()
                app_obj.inform.emit(msg)
                return "fail"

            ret = excellon_obj.create_geometry()
            if ret == 'fail':
                log.debug("Could not create geometry for Excellon object.")
                return "fail"

            for tool in excellon_obj.tools:
                if excellon_obj.tools[tool]['solid_geometry']:
                    return
            app_obj.inform.emit('[ERROR_NOTCL] %s: %s' %
                                (_("No geometry found in file"), filename))
            return "fail"

        with self.proc_container.new(_("Opening Excellon.")):

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]
            ret_val = self.new_object("excellon", name, obj_init, autoselected=False, plot=plot)
            if ret_val == 'fail':
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _('Open Excellon file failed. Probable not an Excellon file.'))
                return

            # Register recent file
            self.file_opened.emit("excellon", filename)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))

    def open_gcode(self, filename, outname=None, plot=True):
        """
        Opens a G-gcode file, parses it and creates a new object for
        it in the program. Thread-safe.

        :param outname: Name of the resulting object. None causes the name to be that of the file.
        :param filename: G-code file filename
        :type filename: str
        :return: None
        """
        App.log.debug("open_gcode()")

        # How the object should be initialized
        def obj_init(job_obj, app_obj_):
            """
            :param job_obj: the resulting object
            :type app_obj_: App
            """
            assert isinstance(app_obj_, App), \
                "Initializer expected App, got %s" % type(app_obj_)

            self.progress.emit(10)

            try:
                f = open(filename)
                gcode = f.read()
                f.close()
            except IOError:
                app_obj_.inform.emit('[ERROR_NOTCL] %s: %s' %
                                     (_("Failed to open"), filename))
                self.progress.emit(0)
                return "fail"

            job_obj.gcode = gcode

            self.progress.emit(20)

            ret = job_obj.gcode_parse()
            if ret == "fail":
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("This is not GCODE"))
                return "fail"

            self.progress.emit(60)
            job_obj.create_geometry()

        with self.proc_container.new(_("Opening G-Code.")):

            # Object name
            name = outname or filename.split('/')[-1].split('\\')[-1]

            # New object creation and file processing
            ret = self.new_object("cncjob", name, obj_init, autoselected=False, plot=plot)
            if ret == 'fail':
                self.inform.emit('[ERROR_NOTCL] %s' %
                                 _("Failed to create CNCJob Object. Probable not a GCode file.\n "
                                   "Attempting to create a FlatCAM CNCJob Object from "
                                   "G-Code file failed during processing"))
                return "fail"

            # Register recent file
            self.file_opened.emit("cncjob", filename)

            # GUI feedback
            self.inform.emit('[success] %s: %s' %
                             (_("Opened"), filename))
            self.progress.emit(100)

    def open_config_file(self, filename, run_from_arg=None):
        """
        Loads a config file from the specified file.

        :param filename:  Name of the file from which to load.
        :type filename: str
        :return: None
        """
        App.log.debug("Opening config file: " + filename)

        if run_from_arg:
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Opening FlatCAM Config file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))
        # add the tab if it was closed
        self.ui.plot_tab_area.addTab(self.ui.cncjob_tab, _("Code Editor"))
        # first clear previous text in text editor (if any)
        self.ui.code_editor.clear()

        # Switch plot_area to CNCJob tab
        self.ui.plot_tab_area.setCurrentWidget(self.ui.cncjob_tab)

        try:
            if filename:
                f = QtCore.QFile(filename)
                if f.open(QtCore.QIODevice.ReadOnly):
                    stream = QtCore.QTextStream(f)
                    gcode_edited = stream.readAll()
                    self.ui.code_editor.setPlainText(gcode_edited)
                    f.close()
        except IOError:
            App.log.error("Failed to open config file: %s" % filename)
            self.inform.emit('[ERROR_NOTCL] %s: %s' %
                             (_("Failed to open config file"), filename))
            return

    def open_project(self, filename, run_from_arg=None, plot=True, cli=None):
        """
        Loads a project from the specified file.

        1) Loads and parses file
        2) Registers the file as recently opened.
        3) Calls on_file_new()
        4) Updates options
        5) Calls new_object() with the object's from_dict() as init method.
        6) Calls plot_all() if plot=True

        :param filename:  Name of the file from which to load.
        :type filename: str
        :param run_from_arg: True if run for arguments
        :param plot: If True plot all objects in the project
        :param cli: run from command line
        :return: None
        """
        App.log.debug("Opening project: " + filename)

        # for some reason, setting ui_title does not work when this method is called from Tcl Shell
        # it's because the TclCommand is run in another thread (it inherit TclCommandSignaled)
        if cli is None:
            self.set_ui_title(name=_("Loading Project ... Please Wait ..."))

        if run_from_arg:
            self.splash.showMessage('%s: %ssec\n%s' % (_("Canvas initialization started.\n"
                                                         "Canvas initialization finished in"), '%.2f' % self.used_time,
                                                       _("Opening FlatCAM Project file.")),
                                    alignment=Qt.AlignBottom | Qt.AlignLeft,
                                    color=QtGui.QColor("gray"))

        # Open and parse an uncompressed Project file
        try:
            f = open(filename, 'r')
        except IOError:
            App.log.error("Failed to open project file: %s" % filename)
            self.inform.emit('[ERROR_NOTCL] %s: %s' %
                             (_("Failed to open project file"), filename))
            return

        try:
            d = json.load(f, object_hook=dict2obj)
        except Exception as e:
            App.log.error("Failed to parse project file, trying to see if it loads as an LZMA archive: %s because %s" %
                          (filename, str(e)))
            f.close()

            # Open and parse a compressed Project file
            try:
                with lzma.open(filename) as f:
                    file_content = f.read().decode('utf-8')
                    d = json.loads(file_content, object_hook=dict2obj)
            except Exception as e:
                App.log.error("Failed to open project file: %s with error: %s" % (filename, str(e)))
                self.inform.emit('[ERROR_NOTCL] %s: %s' %
                                 (_("Failed to open project file"), filename))
                return

        # Clear the current project
        # # NOT THREAD SAFE # ##
        if run_from_arg is True:
            pass
        elif cli is True:
            self.delete_selection_shape()
        else:
            self.on_file_new()

        # Project options
        self.options.update(d['options'])
        self.project_filename = filename

        # for some reason, setting ui_title does not work when this method is called from Tcl Shell
        # it's because the TclCommand is run in another thread (it inherit TclCommandSignaled)
        if cli is None:
            self.set_screen_units(self.options["units"])

        # Re create objects
        App.log.debug(" **************** Started PROEJCT loading... **************** ")

        for obj in d['objs']:
            def obj_init(obj_inst, app_inst):
                obj_inst.from_dict(obj)

            App.log.debug("Recreating from opened project an %s object: %s" %
                          (obj['kind'].capitalize(), obj['options']['name']))

            # for some reason, setting ui_title does not work when this method is called from Tcl Shell
            # it's because the TclCommand is run in another thread (it inherit TclCommandSignaled)
            if cli is None:
                self.set_ui_title(name="{} {}: {}".format(_("Loading Project ... restoring"),
                                                          obj['kind'].upper(),
                                                          obj['options']['name']
                                                          )
                                  )

            self.new_object(obj['kind'], obj['options']['name'], obj_init, active=False, fit=False, plot=plot)

        self.inform.emit('[success] %s: %s' %
                         (_("Project loaded from"), filename))

        self.should_we_save = False
        self.file_opened.emit("project", filename)

        # for some reason, setting ui_title does not work when this method is called from Tcl Shell
        # it's because the TclCommand is run in another thread (it inherit TclCommandSignaled)
        if cli is None:
            self.set_ui_title(name=self.project_filename)

        App.log.debug(" **************** Finished PROJECT loading... **************** ")

    def propagate_defaults(self, silent=False):
        """
        This method is used to set default values in classes. It's
        an alternative to project options but allows the use
        of values invisible to the user.

        :return: None
        """

        if silent is False:
            self.log.debug("propagate_defaults()")

        # Which objects to update the given parameters.
        routes = {
            "global_zdownrate": CNCjob,
            "excellon_zeros": Excellon,
            "excellon_format_upper_in": Excellon,
            "excellon_format_lower_in": Excellon,
            "excellon_format_upper_mm": Excellon,
            "excellon_format_lower_mm": Excellon,
            "excellon_units": Excellon,
            "gerber_use_buffer_for_union": Gerber,
            "geometry_multidepth": Geometry
        }

        for param in routes:
            if param in routes[param].defaults:
                try:
                    routes[param].defaults[param] = self.defaults[param]
                    if silent is False:
                        self.log.debug("  " + param + " OK")
                except KeyError:
                    if silent is False:
                        self.log.debug("  ERROR: " + param + " not in defaults.")
            else:
                # Try extracting the name:
                # classname_param here is param in the object
                if param.find(routes[param].__name__.lower() + "_") == 0:
                    p = param[len(routes[param].__name__) + 1:]
                    if p in routes[param].defaults:
                        routes[param].defaults[p] = self.defaults[param]
                        if silent is False:
                            self.log.debug("  " + param + " OK!")

    def restore_main_win_geom(self):
        try:
            self.ui.setGeometry(self.defaults["global_def_win_x"],
                                self.defaults["global_def_win_y"],
                                self.defaults["global_def_win_w"],
                                self.defaults["global_def_win_h"])
            self.ui.splitter.setSizes([self.defaults["global_def_notebook_width"], 0])
        except KeyError as e:
            log.debug("App.restore_main_win_geom() --> %s" % str(e))

    def plot_all(self, zoom=True):
        """
        Re-generates all plots from all objects.

        :return: None
        """
        self.log.debug("Plot_all()")
        self.inform.emit('[success] %s...' % _("Redrawing all objects"))

        for obj in self.collection.get_list():
            def worker_task(obj):
                with self.proc_container.new("Plotting"):
                    obj.plot(kind=self.defaults["cncjob_plot_kind"])
                    if zoom:
                        self.object_plotted.emit(obj)

            # Send to worker
            self.worker_task.emit({'fcn': worker_task, 'params': [obj]})

    def register_folder(self, filename):
        self.defaults["global_last_folder"] = os.path.split(str(filename))[0]

    def register_save_folder(self, filename):
        self.defaults["global_last_save_folder"] = os.path.split(str(filename))[0]

    def set_progress_bar(self, percentage, text=""):
        self.ui.progress_bar.setValue(int(percentage))

    def setup_shell(self):
        """
        Creates shell functions. Runs once at startup.

        :return: None
        """

        self.log.debug("setup_shell()")

        def shelp(p=None):
            if not p:
                return _("Available commands:\n") + \
                       '\n'.join(['  ' + cmd for cmd in sorted(commands)]) + \
                       _("\n\nType help <command_name> for usage.\n Example: help open_gerber")

            if p not in commands:
                return "Unknown command: %s" % p

            return commands[p]["help"]

        # --- Migrated to new architecture ---
        # def options(name):
        #     ops = self.collection.get_by_name(str(name)).options
        #     return '\n'.join(["%s: %s" % (o, ops[o]) for o in ops])

        def h(*args):
            """
            Pre-processes arguments to detect '-keyword value' pairs into dictionary
            and standalone parameters into list.
            """

            kwa = {}
            a = []
            n = len(args)
            name = None
            for i in range(n):
                match = re.search(r'^-([a-zA-Z].*)', args[i])
                if match:
                    assert name is None
                    name = match.group(1)
                    continue

                if name is None:
                    a.append(args[i])
                else:
                    kwa[name] = args[i]
                    name = None

            return a, kwa

        @contextmanager
        def wait_signal(signal, timeout=10000):
            """
            Block loop until signal emitted, timeout (ms) elapses
            or unhandled exception happens in a thread.

            :param timeout: time after which the loop is exited
            :param signal: Signal to wait for.
            """
            loop = QtCore.QEventLoop()

            # Normal termination
            signal.connect(loop.quit)

            # Termination by exception in thread
            self.thread_exception.connect(loop.quit)

            status = {'timed_out': False}

            def report_quit():
                status['timed_out'] = True
                loop.quit()

            yield

            # Temporarily change how exceptions are managed.
            oeh = sys.excepthook
            ex = []

            def except_hook(type_, value, traceback_):
                ex.append(value)
                oeh(type_, value, traceback_)
            sys.excepthook = except_hook

            # Terminate on timeout
            if timeout is not None:
                QtCore.QTimer.singleShot(timeout, report_quit)

            # # ## Block ## ##
            loop.exec_()

            # Restore exception management
            sys.excepthook = oeh
            if ex:
                self.raiseTclError(str(ex[0]))

            if status['timed_out']:
                raise Exception('Timed out!')

        def make_docs():
            output = ''
            import collections
            od = collections.OrderedDict(sorted(commands.items()))
            for cmd_, val in od.items():
                output += cmd_ + ' \n' + ''.join(['~'] * len(cmd_)) + '\n'

                t = val['help']
                usage_i = t.find('>')
                if usage_i < 0:
                    expl = t
                    output += expl + '\n\n'
                    continue

                expl = t[:usage_i - 1]
                output += expl + '\n\n'

                end_usage_i = t[usage_i:].find('\n')

                if end_usage_i < 0:
                    end_usage_i = len(t[usage_i:])
                    output += '    ' + t[usage_i:] + '\n       No parameters.\n'
                else:
                    extras = t[usage_i+end_usage_i+1:]
                    parts = [s.strip() for s in extras.split('\n')]

                    output += '    ' + t[usage_i:usage_i+end_usage_i] + '\n'
                    for p in parts:
                        output += '       ' + p + '\n\n'

            return output

        '''
            Howto implement TCL shell commands:

            All parameters passed to command should be possible to set as None and test it afterwards.
            This is because we need to see error caused in tcl,
            if None value as default parameter is not allowed TCL will return empty error.
            Use:
                def mycommand(name=None,...):

            Test it like this:
            if name is None:

                self.raise_tcl_error('Argument name is missing.')

            When error ocurre, always use raise_tcl_error, never return "sometext" on error,
            otherwise we will miss it and processing will silently continue.
            Method raise_tcl_error  pass error into TCL interpreter, then raise python exception,
            which is catched in exec_command and displayed in TCL shell console with red background.
            Error in console is displayed  with TCL  trace.

            This behavior works only within main thread,
            errors with promissed tasks can be catched and detected only with log.
            TODO: this problem have to be addressed somehow, maybe rewrite promissing to be blocking somehow for
            TCL shell.

            Kamil's comment: I will rewrite existing TCL commands from time to time to follow this rules.

        '''

        commands = {
            'help': {
                'fcn': shelp,
                'help': _("Shows list of commands.")
            },
        }

        # Import/overwrite tcl commands as objects of TclCommand descendants
        # This modifies the variable 'commands'.
        tclCommands.register_all_commands(self, commands)

        # Add commands to the tcl interpreter
        for cmd in commands:
            self.tcl.createcommand(cmd, commands[cmd]['fcn'])

        # Make the tcl puts function return instead of print to stdout
        self.tcl.eval('''
            rename puts original_puts
            proc puts {args} {
                if {[llength $args] == 1} {
                    return "[lindex $args 0]"
                } else {
                    eval original_puts $args
                }
            }
            ''')

    def setup_recent_items(self):

        # TODO: Move this to constructor
        icons = {
            "gerber": "share/flatcam_icon16.png",
            "excellon": "share/drill16.png",
            'geometry': "share/geometry16.png",
            "cncjob": "share/cnc16.png",
            "project": "share/project16.png",
            "svg": "share/geometry16.png",
            "dxf": "share/dxf16.png",
            "pdf": "share/pdf32.png",
            "image": "share/image16.png"

        }

        openers = {
            'gerber': lambda fname: self.worker_task.emit({'fcn': self.open_gerber, 'params': [fname]}),
            'excellon': lambda fname: self.worker_task.emit({'fcn': self.open_excellon, 'params': [fname]}),
            'geometry': lambda fname: self.worker_task.emit({'fcn': self.import_dxf, 'params': [fname]}),
            'cncjob': lambda fname: self.worker_task.emit({'fcn': self.open_gcode, 'params': [fname]}),
            'project': self.open_project,
            'svg': self.import_svg,
            'dxf': self.import_dxf,
            'image': self.import_image,
            'pdf': lambda fname: self.worker_task.emit({'fcn': self.pdf_tool.open_pdf, 'params': [fname]})
        }

        # Open recent file for files
        try:
            f = open(self.data_path + '/recent.json')
        except IOError:
            App.log.error("Failed to load recent item list.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to load recent item list."))
            return

        try:
            self.recent = json.load(f)
        except json.scanner.JSONDecodeError:
            App.log.error("Failed to parse recent item list.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to parse recent item list."))
            f.close()
            return
        f.close()

        # Open recent file for projects
        try:
            fp = open(self.data_path + '/recent_projects.json')
        except IOError:
            App.log.error("Failed to load recent project item list.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to load recent projects item list."))
            return

        try:
            self.recent_projects = json.load(fp)
        except json.scanner.JSONDecodeError:
            App.log.error("Failed to parse recent project item list.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Failed to parse recent project item list."))
            fp.close()
            return
        fp.close()

        # Closure needed to create callbacks in a loop.
        # Otherwise late binding occurs.
        def make_callback(func, fname):
            def opener():
                func(fname)
            return opener

        def reset_recent_files():
            # Reset menu
            self.ui.recent.clear()
            self.recent = []
            try:
                f = open(self.data_path + '/recent.json', 'w')
            except IOError:
                App.log.error("Failed to open recent items file for writing.")
                return

            json.dump(self.recent, f)

        def reset_recent_projects():
            # Reset menu
            self.ui.recent_projects.clear()
            self.recent_projects = []

            try:
                fp = open(self.data_path + '/recent_projects.json', 'w')
            except IOError:
                App.log.error("Failed to open recent projects items file for writing.")
                return

            json.dump(self.recent, fp)

        # Reset menu
        self.ui.recent.clear()
        self.ui.recent_projects.clear()

        # Create menu items for projects
        for recent in self.recent_projects:
            filename = recent['filename'].split('/')[-1].split('\\')[-1]

            if recent['kind'] == 'project':
                try:
                    action = QtWidgets.QAction(QtGui.QIcon(icons[recent["kind"]]), filename, self)

                    # Attach callback
                    o = make_callback(openers[recent["kind"]], recent['filename'])
                    action.triggered.connect(o)

                    self.ui.recent_projects.addAction(action)

                except KeyError:
                    App.log.error("Unsupported file type: %s" % recent["kind"])

        # Last action in Recent Files menu is one that Clear the content
        clear_action_proj = QtWidgets.QAction(QtGui.QIcon('share/trash32.png'), (_("Clear Recent files")), self)
        clear_action_proj.triggered.connect(reset_recent_projects)
        self.ui.recent_projects.addSeparator()
        self.ui.recent_projects.addAction(clear_action_proj)

        # Create menu items for files
        for recent in self.recent:
            filename = recent['filename'].split('/')[-1].split('\\')[-1]

            if recent['kind'] != 'project':
                try:
                    action = QtWidgets.QAction(QtGui.QIcon(icons[recent["kind"]]), filename, self)

                    # Attach callback
                    o = make_callback(openers[recent["kind"]], recent['filename'])
                    action.triggered.connect(o)

                    self.ui.recent.addAction(action)

                except KeyError:
                    App.log.error("Unsupported file type: %s" % recent["kind"])

        # Last action in Recent Files menu is one that Clear the content
        clear_action = QtWidgets.QAction(QtGui.QIcon('share/trash32.png'), (_("Clear Recent files")), self)
        clear_action.triggered.connect(reset_recent_files)
        self.ui.recent.addSeparator()
        self.ui.recent.addAction(clear_action)

        # self.builder.get_object('open_recent').set_submenu(recent_menu)
        # self.ui.menufilerecent.set_submenu(recent_menu)
        # recent_menu.show_all()
        # self.ui.recent.show()

        self.log.debug("Recent items list has been populated.")

    def setup_component_editor(self):
        # label = QtWidgets.QLabel("Choose an item from Project")
        # label.setAlignment(QtCore.Qt.AlignHCenter | QtCore.Qt.AlignVCenter)

        sel_title = QtWidgets.QTextEdit(
            _('<b>Shortcut Key List</b>'))
        sel_title.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
        sel_title.setFrameStyle(QtWidgets.QFrame.NoFrame)

        settings = QSettings("Open Source", "FlatCAM")
        if settings.contains("notebook_font_size"):
            fsize = settings.value('notebook_font_size', type=int)
        else:
            fsize = 12

        tsize = fsize + int(fsize / 2)

#         selected_text = (_('''
# <p><span style="font-size:{tsize}px"><strong>Selected Tab - Choose an Item from Project Tab</strong></span></p>
#
# <p><span style="font-size:{fsize}px"><strong>Details</strong>:<br />
# The normal flow when working in FlatCAM is the following:</span></p>
#
# <ol>
# 	<li><span style="font-size:{fsize}px">Loat/Import a Gerber, Excellon, Gcode, DXF, Raster Image or SVG file into
        # 	FlatCAM using either the menu&#39;s, toolbars, key shortcuts or
        # 	even dragging and dropping the files on the GUI.<br />
# 	<br />
# 	You can also load a <strong>FlatCAM project</strong> by double clicking on the project file, drag &amp; drop of the
        # 	file into the FLATCAM GUI or through the menu/toolbar links offered within the app.</span><br />
# 	&nbsp;</li>
# 	<li><span style="font-size:{fsize}px">Once an object is available in the Project Tab, by selecting it and then
        # 	focusing on <strong>SELECTED TAB </strong>(more simpler is to double click the object name in the
        # 	Project Tab), <strong>SELECTED TAB </strong>will be updated with the object properties according to
        # 	it&#39;s kind: Gerber, Excellon, Geometry or CNCJob object.<br />
# 	<br />
# 	If the selection of the object is done on the canvas by single click instead, and the <strong>SELECTED TAB</strong>
        # 	is in focus, again the object properties will be displayed into the Selected Tab. Alternatively,
        # 	double clicking on the object on the canvas will bring the <strong>SELECTED TAB</strong> and populate
        # 	it even if it was out of focus.<br />
# 	<br />
# 	You can change the parameters in this screen and the flow direction is like this:<br />
# 	<br />
# 	<strong>Gerber/Excellon Object</strong> -&gt; Change Param -&gt; Generate Geometry -&gt;<strong> Geometry Object
        # 	</strong>-&gt; Add tools (change param in Selected Tab) -&gt; Generate CNCJob -&gt;<strong> CNCJob Object
        # 	</strong>-&gt; Verify GCode (through Edit CNC Code) and/or append/prepend to GCode (again, done in
        # 	<strong>SELECTED TAB)&nbsp;</strong>-&gt; Save GCode</span></li>
# </ol>
#
# <p><span style="font-size:{fsize}px">A list of key shortcuts is available through an menu entry in
        # <strong>Help -&gt; Shortcuts List</strong>&nbsp;or through it&#39;s own key shortcut:
        # <strong>F3</strong>.</span></p>
#
#         ''').format(fsize=fsize, tsize=tsize))

        selected_text = '''
        <p><span style="font-size:{tsize}px"><strong>%s</strong></span></p>

        <p><span style="font-size:{fsize}px"><strong>%s</strong>:<br />
        %s:</span></p>

        <ol>
            <li><span style="font-size:{fsize}px">%s menu&#39;s, %s.<br />
            <br />
            %s &amp; %s.</span><br />
            &nbsp;</li>
            <li><span style="font-size:{fsize}px">%s <strong>%s</strong> (%s), <strong>%s</strong> %s it-s %s.<br />
            <br />
            %s <strong>%s</strong> %s <strong>%s</strong> %s.<br />
            <br />
            %s:<br />
            <br />
            <strong>%s</strong> -&gt; %s -&gt; %s -&gt;<strong> %s </strong> -&gt; %s -&gt; %s -&gt;<strong> %s
            </strong>-&gt; %s <strong>%s)&nbsp;</strong>-&gt; %s</span></li>
        </ol>

        <p><span style="font-size:{fsize}px">%s <strong>%s -&gt; %s</strong>&nbsp;%s it&#39;s %s:
        <strong>F3</strong>.</span></p>
        ''' % (
            _("Selected Tab - Choose an Item from Project Tab"), _("Details"),
            _("The normal flow when working in FlatCAM is the following"),
            _("Load/Import a Gerber, Excellon, Gcode, DXF, Raster Image or SVG file into FlatCAM using either the"),
            _("toolbars, key shortcuts or even dragging and dropping the files on the GUI"),
            _("You can also load a FlatCAM project by double clicking on the project file, drag"),
            _("drop of the file into the FLATCAM GUI or through the menu/toolbar links offered within the app"),
            _("Once an object is available in the Project Tab, by selecting it and then focusing on"),
            _("SELECTED TAB"), _("more simpler is to double click the object name in the Project Tab"),
            _("SELECTED TAB"), _("will be updated with the object properties according to"),
            _("kind: Gerber, Excellon, Geometry or CNCJob object"),
            _("If the selection of the object is done on the canvas by single click instead, and the"),
            _("SELECTED TAB"),
            _("is in focus, again the object properties will be displayed into the Selected Tab. Alternatively, "
              "double clicking on the object on the canvas will bring the"),
            _("SELECTED TAB"), _("and populate it even if it was out of focus"),
            _("You can change the parameters in this screen and the flow direction is like this"),
            _("Gerber/Excellon Object"), _("Change Parameter"), _("Generate Geometry"), _("Geometry Object"),
            _("Add tools (change param in Selected Tab)"), _("Generate CNCJob"), _("CNCJob Object"),
            _("Verify GCode (through Edit CNC Code) and/or append/prepend to GCode (again, done in"), _("SELECTED TAB"),
            _("Save GCode"), _("A list of key shortcuts is available through an menu entry in"), _("Help"),
            _("Shortcuts List"), _("or through"), _("own key shortcut"),
        )

        sel_title.setText(selected_text)
        sel_title.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)

        self.ui.selected_scroll_area.setWidget(sel_title)

    def setup_obj_classes(self):
        """
        Sets up application specifics on the FlatCAMObj class.

        :return: None
        """
        FlatCAMObj.app = self
        ObjectCollection.app = self
        Gerber.app = self
        Excellon.app = self
        Geometry.app = self
        CNCjob.app = self
        FCProcess.app = self
        FCProcessContainer.app = self

    def version_check(self):
        """
        Checks for the latest version of the program. Alerts the
        user if theirs is outdated. This method is meant to be run
        in a separate thread.

        :return: None
        """

        self.log.debug("version_check()")

        if self.ui.general_defaults_form.general_app_group.send_stats_cb.get_value() is True:
            full_url = App.version_url + \
                       "?s=" + str(self.defaults['global_serial']) + \
                       "&v=" + str(self.version) + \
                       "&os=" + str(self.os) + \
                       "&" + urllib.parse.urlencode(self.defaults["global_stats"])
        else:
            # no_stats dict; just so it won't break things on website
            no_ststs_dict = {}
            no_ststs_dict["global_ststs"] = {}
            full_url = App.version_url + \
                       "?s=" + str(self.defaults['global_serial']) + \
                       "&v=" + str(self.version) + \
                       "&os=" + str(self.os) + \
                       "&" + urllib.parse.urlencode(no_ststs_dict["global_ststs"])

        App.log.debug("Checking for updates @ %s" % full_url)
        # ## Get the data
        try:
            f = urllib.request.urlopen(full_url)
        except:
            # App.log.warning("Failed checking for latest version. Could not connect.")
            self.log.warning("Failed checking for latest version. Could not connect.")
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("Failed checking for latest version. Could not connect."))
            return

        try:
            data = json.load(f)
        except Exception as e:
            App.log.error("Could not parse information about latest version.")
            self.inform.emit('[ERROR_NOTCL] %s' %
                             _("Could not parse information about latest version."))
            App.log.debug("json.load(): %s" % str(e))
            f.close()
            return

        f.close()

        # ## Latest version?
        if self.version >= data["version"]:
            App.log.debug("FlatCAM is up to date!")
            self.inform.emit('[success] %s' %
                             _("FlatCAM is up to date!"))
            return

        App.log.debug("Newer version available.")
        self.message.emit(
            _("Newer Version Available"),
            _("There is a newer version of FlatCAM available for download:\n\n") +
            "<b>%s</b>" % str(data["name"]) + "\n%s" % str(data["message"]),
            _("info")
        )

    def on_plotcanvas_setup(self, container=None):
        """
        This is doing the setup for the plot area (VisPy canvas)

        :param container: widget where to install the canvas
        :return: None
        """
        if container:
            plot_container = container
        else:
            plot_container = self.ui.right_layout

        self.plotcanvas = PlotCanvas(plot_container, self)

        # So it can receive key presses
        self.plotcanvas.native.setFocus()

        self.plotcanvas.vis_connect('mouse_move', self.on_mouse_move_over_plot)
        self.plotcanvas.vis_connect('mouse_press', self.on_mouse_click_over_plot)
        self.plotcanvas.vis_connect('mouse_release', self.on_mouse_click_release_over_plot)
        self.plotcanvas.vis_connect('mouse_double_click', self.on_double_click_over_plot)

        # Keys over plot enabled
        self.plotcanvas.vis_connect('key_press', self.ui.keyPressEvent)

        self.app_cursor = self.plotcanvas.new_cursor()
        self.app_cursor.enabled = False
        self.hover_shapes = ShapeCollection(parent=self.plotcanvas.view.scene, layers=1)

    def on_zoom_fit(self, event):
        """
        Callback for zoom-out request. This can be either from the corresponding
        toolbar button or the '1' key when the canvas is focused. Calls ``self.adjust_axes()``
        with axes limits from the geometry bounds of all objects.

        :param event: Ignored.
        :return: None
        """

        self.plotcanvas.fit_view()

    def on_zoom_in(self):
        self.plotcanvas.zoom(1 / float(self.defaults['global_zoom_ratio']))

    def on_zoom_out(self):
        self.plotcanvas.zoom(float(self.defaults['global_zoom_ratio']))

    def disable_all_plots(self):
        self.report_usage("disable_all_plots()")

        self.disable_plots(self.collection.get_list())
        self.inform.emit('[success] %s' %
                         _("All plots disabled."))

    def disable_other_plots(self):
        self.report_usage("disable_other_plots()")

        self.disable_plots(self.collection.get_non_selected())
        self.inform.emit('[success] %s' %
                         _("All non selected plots disabled."))

    def enable_all_plots(self):
        self.report_usage("enable_all_plots()")

        self.enable_plots(self.collection.get_list())
        self.inform.emit('[success] %s' %
                         _("All plots enabled."))

    def on_enable_sel_plots(self):
        log.debug("App.on_enable_sel_plot()")
        object_list = self.collection.get_selected()
        self.enable_plots(objects=object_list)
        self.inform.emit('[success] %s' %
                         _("Selected plots enabled..."))

    def on_disable_sel_plots(self):
        log.debug("App.on_disable_sel_plot()")

        # self.inform.emit(_("Disabling plots ..."))
        object_list = self.collection.get_selected()
        self.disable_plots(objects=object_list)
        self.inform.emit('[success] %s' %
                         _("Selected plots disabled..."))

    def enable_plots(self, objects):
        """
        Disables plots
        :param objects: list of Objects to be enabled
        :return:
        """
        log.debug("Enabling plots ...")
        # self.inform.emit(_("Working ..."))

        for obj in objects:
            if obj.options['plot'] is False:
                obj.options.set_change_callback(lambda x: None)
                obj.options['plot'] = True
                obj.options.set_change_callback(obj.on_options_change)

        def worker_task(objects):
            with self.proc_container.new(_("Enabling plots ...")):
                for obj in objects:
                    # obj.options['plot'] = True
                    if isinstance(obj, FlatCAMCNCjob):
                        obj.plot(visible=True, kind=self.defaults["cncjob_plot_kind"])
                    else:
                        obj.plot(visible=True)

        self.worker_task.emit({'fcn': worker_task, 'params': [objects]})

        # self.plots_updated.emit()

    def disable_plots(self, objects):
        """
        Disables plots
        :param objects: list of Objects to be disabled
        :return:
        """

        # if no objects selected then do nothing
        if not self.collection.get_selected():
            return

        log.debug("Disabling plots ...")
        # self.inform.emit(_("Working ..."))

        for obj in objects:
            if obj.options['plot'] is True:
                obj.options.set_change_callback(lambda x: None)
                obj.options['plot'] = False
                obj.options.set_change_callback(obj.on_options_change)

        try:
            self.delete_selection_shape()
        except Exception as e:
            log.debug("App.disable_plots() --> %s" % str(e))

        # self.plots_updated.emit()
        def worker_task(objects):
            with self.proc_container.new(_("Disabling plots ...")):
                for obj in objects:
                    # obj.options['plot'] = True
                    if isinstance(obj, FlatCAMCNCjob):
                        obj.plot(visible=False, kind=self.defaults["cncjob_plot_kind"])
                    else:
                        obj.plot(visible=False)

        self.worker_task.emit({'fcn': worker_task, 'params': [objects]})

    def toggle_plots(self, objects):
        """
        Toggle plots visibility
        :param objects: list of Objects for which to be toggled the visibility
        :return:
        """

        # if no objects selected then do nothing
        if not self.collection.get_selected():
            return

        log.debug("Toggling plots ...")
        self.inform.emit(_("Working ..."))
        for obj in objects:
            if obj.options['plot'] is False:
                obj.options['plot'] = True
            else:
                obj.options['plot'] = False
        self.plots_updated.emit()

    def clear_plots(self):

        objects = self.collection.get_list()

        for obj in objects:
            obj.clear(obj == objects[-1])

        # Clear pool to free memory
        self.clear_pool()

    def generate_cnc_job(self, objects):
        self.report_usage("generate_cnc_job()")

        # for obj in objects:
        #     obj.generatecncjob()
        for obj in objects:
            obj.on_generatecnc_button_click()

    def save_project(self, filename, quit_action=False):
        """
        Saves the current project to the specified file.

        :param filename: Name of the file in which to save.
        :type filename: str
        :param quit_action: if the project saving will be followed by an app quit; boolean
        :return: None
        """
        self.log.debug("save_project()")
        self.save_in_progress = True

        with self.proc_container.new(_("Saving FlatCAM Project")) as proc:
            # Capture the latest changes
            # Current object
            try:
                self.collection.get_active().read_form()
            except:
                self.log.debug("There was no active object")
                pass
            # Project options
            self.options_read_form()

            # Serialize the whole project
            d = {"objs": [obj.to_dict() for obj in self.collection.get_list()],
                 "options": self.options,
                 "version": self.version}

            if self.defaults["global_save_compressed"] is True:
                with lzma.open(filename, "w", preset=int(self.defaults['global_compression_level'])) as f:
                    g = json.dumps(d, default=to_dict, indent=2, sort_keys=True).encode('utf-8')
                    # # Write
                    f.write(g)
                self.inform.emit('[success] %s: %s' %
                                 (_("Project saved to"), filename))
            else:
                # Open file
                try:
                    f = open(filename, 'w')
                except IOError:
                    App.log.error("Failed to open file for saving: %s", filename)
                    return

                # Write
                json.dump(d, f, default=to_dict, indent=2, sort_keys=True)
                f.close()

                # verification of the saved project
                # Open and parse
                try:
                    saved_f = open(filename, 'r')
                except IOError:
                    self.inform.emit('[ERROR_NOTCL] %s: %s %s' %
                                     (_("Failed to verify project file"), filename, _("Retry to save it."))
                                     )
                    return

                try:
                    saved_d = json.load(saved_f, object_hook=dict2obj)
                except:
                    self.inform.emit('[ERROR_NOTCL] %s: %s %s' %
                                     (_("Failed to parse saved project file"), filename, _("Retry to save it."))
                                     )
                    f.close()
                    return
                saved_f.close()

                if 'version' in saved_d:
                    self.inform.emit('[success] %s: %s' %
                                     (_("Project saved to"), filename))
                else:
                    self.inform.emit('[ERROR_NOTCL] %s: %s %s' %
                                     (_("Failed to parse saved project file"), filename, _("Retry to save it."))
                                     )

                settings = QSettings("Open Source", "FlatCAM")
                lock_state = self.ui.lock_action.isChecked()
                settings.setValue('toolbar_lock', lock_state)

                # This will write the setting to the platform specific storage.
                del settings

            # if quit:
                # t = threading.Thread(target=lambda: self.check_project_file_size(1, filename=filename))
                # t.start()
            self.start_delayed_quit(delay=500, filename=filename, should_quit=quit_action)

    def start_delayed_quit(self, delay, filename, should_quit=None):
        """

        :param delay:       period of checking if project file size is more than zero; in seconds
        :param filename:    the name of the project file to be checked periodically for size more than zero
        :param should_quit: if the task finished will be followed by an app quit; boolean
        :return:
        """
        to_quit = should_quit
        self.save_timer = QtCore.QTimer()
        self.save_timer.setInterval(delay)
        self.save_timer.timeout.connect(lambda: self.check_project_file_size(filename=filename, should_quit=to_quit))
        self.save_timer.start()

    def check_project_file_size(self, filename, should_quit=None):
        """

        :param filename: the name of the project file to be checked periodically for size more than zero
        :param should_quit: will quit the app if True; boolean
        :return:
        """

        try:
            if os.stat(filename).st_size > 0:
                self.save_in_progress = False
                self.save_timer.stop()
                if should_quit:
                    self.app_quit.emit()
        except Exception as e:
            traceback.print_exc()

    def on_options_app2project(self):
        """
        Callback for Options->Transfer Options->App=>Project. Copies options
        from application defaults to project defaults.

        :return: None
        """

        self.report_usage("on_options_app2project")

        self.defaults_read_form()
        self.options.update(self.defaults)
        self.options_write_form()

    def on_options_project2app(self):
        """
        Callback for Options->Transfer Options->Project=>App. Copies options
        from project defaults to application defaults.

        :return: None
        """

        self.report_usage("on_options_project2app")

        self.options_read_form()
        self.defaults.update(self.options)
        self.defaults_write_form()

    def on_options_project2object(self):
        """
        Callback for Options->Transfer Options->Project=>Object. Copies options
        from project defaults to the currently selected object.

        :return: None
        """

        self.report_usage("on_options_project2object")

        self.options_read_form()
        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            return
        for option in self.options:
            if option.find(obj.kind + "_") == 0:
                oname = option[len(obj.kind) + 1:]
                obj.options[oname] = self.options[option]
        obj.to_form()  # Update UI

    def on_options_object2project(self):
        """
        Callback for Options->Transfer Options->Object=>Project. Copies options
        from the currently selected object to project defaults.

        :return: None
        """

        self.report_usage("on_options_object2project")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            return
        obj.read_form()
        for option in obj.options:
            if option in ['name']:  # TODO: Handle this better...
                continue
            self.options[obj.kind + "_" + option] = obj.options[option]
        self.options_write_form()

    def on_options_object2app(self):
        """
        Callback for Options->Transfer Options->Object=>App. Copies options
        from the currently selected object to application defaults.

        :return: None
        """

        self.report_usage("on_options_object2app")

        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            return
        obj.read_form()
        for option in obj.options:
            if option in ['name']:  # TODO: Handle this better...
                continue
            self.defaults[obj.kind + "_" + option] = obj.options[option]
        self.defaults_write_form()

    def on_options_app2object(self):
        """
        Callback for Options->Transfer Options->App=>Object. Copies options
        from application defaults to the currently selected object.

        :return: None
        """

        self.report_usage("on_options_app2object")

        self.defaults_read_form()
        obj = self.collection.get_active()
        if obj is None:
            self.inform.emit('[WARNING_NOTCL] %s' %
                             _("No object selected."))
            return
        for option in self.defaults:
            if option.find(obj.kind + "_") == 0:
                oname = option[len(obj.kind) + 1:]
                obj.options[oname] = self.defaults[option]
        obj.to_form()  # Update UI


class ArgsThread(QtCore.QObject):
    open_signal = pyqtSignal(list)
    start = pyqtSignal()

    if sys.platform == 'win32':
        address = (r'\\.\pipe\NPtest', 'AF_PIPE')
    else:
        address = ('/tmp/testipc', 'AF_UNIX')

    def __init__(self):
        super(ArgsThread, self).__init__()
        self.start.connect(self.run)

    def my_loop(self, address):
        try:
            listener = Listener(*address)
            while True:
                conn = listener.accept()
                self.serve(conn)
        except socket.error as e:
            conn = Client(*address)
            conn.send(sys.argv)
            conn.send('close')
            # close the current instance only if there are args
            if len(sys.argv) > 1:
                sys.exit()

    def serve(self, conn):
        while True:
            msg = conn.recv()
            if msg == 'close':
                break
            self.open_signal.emit(msg)
        conn.close()

    # the decorator is a must; without it this technique will not work unless the start signal is connected
    # in the main thread (where this class is instantiated) after the instance is moved o the new thread
    @pyqtSlot()
    def run(self):
        self.my_loop(self.address)


class GracefulException(Exception):
    # Graceful Exception raised when the user is requesting to cancel the current threaded task
    def __init__(self):
        super().__init__()

    def __str__(self):
        return ('\n\n%s' % _("The user requested a graceful exit of the current task."))

# end of file