# ##########################################################
# FlatCAM: 2D Post-processing for Manufacturing            #
# File Author: Marius Adrian Stanciu (c)                   #
# Date: 10/25/2019                                          #
# MIT Licence                                              #
# ##########################################################

from PyQt5 import QtWidgets, QtCore

import FlatCAMApp
from FlatCAMTool import FlatCAMTool
from flatcamGUI.GUIElements import FCDoubleSpinner, RadioSet
from FlatCAMObj import FlatCAMGerber, FlatCAMGeometry, FlatCAMExcellon

import shapely.geometry.base as base
from shapely.ops import cascaded_union, unary_union
from shapely.geometry import Polygon, MultiPolygon

import logging
from copy import deepcopy
import numpy as np
from collections import Iterable

import gettext
import FlatCAMTranslation as fcTranslate
import builtins

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

log = logging.getLogger('base')


class ToolCopperFill(FlatCAMTool):

    toolName = _("Copper Fill Tool")

    def __init__(self, app):
        FlatCAMTool.__init__(self, app)

        self.app = app
        self.canvas = self.app.plotcanvas

        self.decimals = 4
        self.units = ''

        # ## Title
        title_label = QtWidgets.QLabel("%s" % self.toolName)
        title_label.setStyleSheet("""
                        QLabel
                        {
                            font-size: 16px;
                            font-weight: bold;
                        }
                        """)
        self.layout.addWidget(title_label)
        self.layout.addWidget(QtWidgets.QLabel(''))

        # ## Grid Layout
        i_grid_lay = QtWidgets.QGridLayout()
        self.layout.addLayout(i_grid_lay)
        i_grid_lay.setColumnStretch(0, 0)
        i_grid_lay.setColumnStretch(1, 1)

        self.grb_object_combo = QtWidgets.QComboBox()
        self.grb_object_combo.setModel(self.app.collection)
        self.grb_object_combo.setRootModelIndex(self.app.collection.index(0, 0, QtCore.QModelIndex()))
        self.grb_object_combo.setCurrentIndex(1)

        self.grbobj_label = QtWidgets.QLabel("<b>%s:</b>" % _("GERBER"))
        self.grbobj_label.setToolTip(
            _("Gerber Object to which will be added a copper fill.")
        )

        i_grid_lay.addWidget(self.grbobj_label, 0, 0)
        i_grid_lay.addWidget(self.grb_object_combo, 0, 1, 1, 2)
        i_grid_lay.addWidget(QtWidgets.QLabel(''), 1, 0)

        # ## Grid Layout
        grid_lay = QtWidgets.QGridLayout()
        self.layout.addLayout(grid_lay)
        grid_lay.setColumnStretch(0, 0)
        grid_lay.setColumnStretch(1, 1)

        self.copper_fill_label = QtWidgets.QLabel('<b>%s</b>' % _('Parameters'))
        self.copper_fill_label.setToolTip(
            _("Parameters used for this tool.")
        )
        grid_lay.addWidget(self.copper_fill_label, 0, 0, 1, 2)

        # CLEARANCE #
        self.clearance_label = QtWidgets.QLabel('%s:' % _("Clearance"))
        self.clearance_label.setToolTip(
            _("This set the distance between the copper fill components\n"
              "(the polygon fill may be split in multiple polygons)\n"
              "and the copper traces in the Gerber file.")
        )
        self.clearance_entry = FCDoubleSpinner()
        self.clearance_entry.setMinimum(0.00001)
        self.clearance_entry.set_precision(self.decimals)
        self.clearance_entry.setSingleStep(0.1)

        grid_lay.addWidget(self.clearance_label, 1, 0)
        grid_lay.addWidget(self.clearance_entry, 1, 1)

        # MARGIN #
        self.margin_label = QtWidgets.QLabel('%s:' % _("Margin"))
        self.margin_label.setToolTip(
            _("Bounding box margin.")
        )
        self.margin_entry = FCDoubleSpinner()
        self.margin_entry.setMinimum(0.0)
        self.margin_entry.set_precision(self.decimals)
        self.margin_entry.setSingleStep(0.1)

        grid_lay.addWidget(self.margin_label, 2, 0)
        grid_lay.addWidget(self.margin_entry, 2, 1)

        # Reference #
        self.reference_radio = RadioSet([
            {'label': _('Itself'), 'value': 'itself'},
            {"label": _("Area Selection"), "value": "area"},
            {'label':  _("Reference Object"), 'value': 'box'}
        ], orientation='vertical', stretch=False)
        self.reference_label = QtWidgets.QLabel(_("Reference:"))
        self.reference_label.setToolTip(
            _("- 'Itself' - the copper fill extent is based on the object that is copper cleared.\n "
              "- 'Area Selection' - left mouse click to start selection of the area to be filled.\n"
              "- 'Reference Object' - will do copper filling within the area specified by another object.")
        )
        grid_lay.addWidget(self.reference_label, 3, 0)
        grid_lay.addWidget(self.reference_radio, 3, 1)

        self.box_combo_type_label = QtWidgets.QLabel('%s:' % _("Ref. Type"))
        self.box_combo_type_label.setToolTip(
            _("The type of FlatCAM object to be used as copper filling reference.\n"
              "It can be Gerber, Excellon or Geometry.")
        )
        self.box_combo_type = QtWidgets.QComboBox()
        self.box_combo_type.addItem(_("Gerber   Reference Box Object"))
        self.box_combo_type.addItem(_("Excellon Reference Box Object"))
        self.box_combo_type.addItem(_("Geometry Reference Box Object"))

        grid_lay.addWidget(self.box_combo_type_label, 4, 0)
        grid_lay.addWidget(self.box_combo_type, 4, 1)

        self.box_combo_label = QtWidgets.QLabel('%s:' % _("Ref. Object"))
        self.box_combo_label.setToolTip(
            _("The FlatCAM object to be used as non copper clearing reference.")
        )
        self.box_combo = QtWidgets.QComboBox()
        self.box_combo.setModel(self.app.collection)
        self.box_combo.setRootModelIndex(self.app.collection.index(0, 0, QtCore.QModelIndex()))
        self.box_combo.setCurrentIndex(1)

        grid_lay.addWidget(self.box_combo_label, 5, 0)
        grid_lay.addWidget(self.box_combo, 5, 1)

        self.box_combo.hide()
        self.box_combo_label.hide()
        self.box_combo_type.hide()
        self.box_combo_type_label.hide()

        # ## Insert Copper Fill
        self.fill_button = QtWidgets.QPushButton(_("Insert Copper Fill"))
        self.fill_button.setToolTip(
            _("Will add a polygon (may be split in multiple parts)\n"
              "that will surround the actual Gerber traces at a certain distance.")
        )
        self.layout.addWidget(self.fill_button)

        self.layout.addStretch()

        # Objects involved in Copper filling
        self.grb_object = None
        self.ref_obj = None
        self.sel_rect = list()

        # Events ID
        self.mr = None
        self.mm = None

        # Mouse cursor positions
        self.mouse_is_dragging = False
        self.cursor_pos = (0, 0)
        self.first_click = False

        # Tool properties
        self.clearance_val = None
        self.margin_val = None
        self.geo_steps_per_circle = 128

        # SIGNALS
        self.fill_button.clicked.connect(self.execute)
        self.box_combo_type.currentIndexChanged.connect(self.on_combo_box_type)
        self.reference_radio.group_toggle_fn = self.on_toggle_reference

    def run(self, toggle=True):
        self.app.report_usage("ToolCopperFill()")

        if toggle:
            # if the splitter is hidden, display it, else hide it but only if the current widget is the same
            if self.app.ui.splitter.sizes()[0] == 0:
                self.app.ui.splitter.setSizes([1, 1])
            else:
                try:
                    if self.app.ui.tool_scroll_area.widget().objectName() == self.toolName:
                        # if tab is populated with the tool but it does not have the focus, focus on it
                        if not self.app.ui.notebook.currentWidget() is self.app.ui.tool_tab:
                            # focus on Tool Tab
                            self.app.ui.notebook.setCurrentWidget(self.app.ui.tool_tab)
                        else:
                            self.app.ui.splitter.setSizes([0, 1])
                except AttributeError:
                    pass
        else:
            if self.app.ui.splitter.sizes()[0] == 0:
                self.app.ui.splitter.setSizes([1, 1])

        FlatCAMTool.run(self)

        self.set_tool_ui()

        self.app.ui.notebook.setTabText(2, _("Copper Fill Tool"))

    def install(self, icon=None, separator=None, **kwargs):
        FlatCAMTool.install(self, icon, separator, shortcut='ALT+F', **kwargs)

    def set_tool_ui(self):
        self.units = self.app.ui.general_defaults_form.general_app_group.units_radio.get_value()
        # self.clearance_entry.set_value(float(self.app.defaults["tools_copperfill_clearance"]))
        # self.margin_entry.set_value(float(self.app.defaults["tools_copperfill_margin"]))
        # self.reference_radio.set_value(self.app.defaults["tools_copperfill_reference"])
        # self.geo_steps_per_circle = int(self.app.defaults["tools_copperfill_circle_steps"])

        self.clearance_entry.set_value(0.5)
        self.margin_entry.set_value(1.0)
        self.reference_radio.set_value('itself')

    def on_combo_box_type(self):
        obj_type = self.box_combo_type.currentIndex()
        self.box_combo.setRootModelIndex(self.app.collection.index(obj_type, 0, QtCore.QModelIndex()))
        self.box_combo.setCurrentIndex(0)

    def on_toggle_reference(self):
        if self.reference_radio.get_value() == "itself" or self.reference_radio.get_value() == "area":
            self.box_combo.hide()
            self.box_combo_label.hide()
            self.box_combo_type.hide()
            self.box_combo_type_label.hide()
        else:
            self.box_combo.show()
            self.box_combo_label.show()
            self.box_combo_type.show()
            self.box_combo_type_label.show()

    def execute(self):
        self.clearance_val = self.clearance_entry.get_value()
        self.margin_val = self.margin_entry.get_value()
        reference_method = self.reference_radio.get_value()

        # get the Gerber object on which the Copper fill will be inserted
        selection_index = self.grb_object_combo.currentIndex()
        model_index = self.app.collection.index(selection_index, 0, self.grb_object_combo.rootModelIndex())

        try:
            self.grb_object = model_index.internalPointer().obj
        except Exception as e:
            log.debug("ToolCopperFill.execute() --> %s" % str(e))
            self.app.inform.emit('[WARNING_NOTCL] %s' % _("There is no Gerber object loaded ..."))
            return 'fail'

        if reference_method == 'itself':
            bound_obj_name = self.grb_object_combo.currentText()

            # Get reference object.
            try:
                self.ref_obj = self.app.collection.get_by_name(bound_obj_name)
            except Exception as e:
                self.app.inform.emit('[ERROR_NOTCL] %s: %s' % (_("Could not retrieve object"), str(e)))
                return "Could not retrieve object: %s" % self.obj_name

            self.on_copper_fill(
                fill_obj=self.grb_object,
                c_val=self.clearance_val,
                margin=self.margin_val
            )

        elif reference_method == 'area':
            self.app.inform.emit('[WARNING_NOTCL] %s' % _("Click the start point of the area."))

            if self.app.is_legacy is False:
                self.app.plotcanvas.graph_event_disconnect('mouse_press', self.app.on_mouse_click_over_plot)
                self.app.plotcanvas.graph_event_disconnect('mouse_move', self.app.on_mouse_move_over_plot)
                self.app.plotcanvas.graph_event_disconnect('mouse_release', self.app.on_mouse_click_release_over_plot)
            else:
                self.app.plotcanvas.graph_event_disconnect(self.app.mp)
                self.app.plotcanvas.graph_event_disconnect(self.app.mm)
                self.app.plotcanvas.graph_event_disconnect(self.app.mr)

            self.mr = self.app.plotcanvas.graph_event_connect('mouse_release', self.on_mouse_release)
            self.mm = self.app.plotcanvas.graph_event_connect('mouse_move', self.on_mouse_move)

        elif reference_method == 'box':
            bound_obj_name = self.box_combo.currentText()

            # Get reference object.
            try:
                self.ref_obj = self.app.collection.get_by_name(bound_obj_name)
            except Exception as e:
                self.app.inform.emit('[ERROR_NOTCL] %s: %s' % (_("Could not retrieve object"), bound_obj_name))
                return "Could not retrieve object: %s. Error: %s" % (bound_obj_name, str(e))

            self.on_copper_fill(
                fill_obj=self.grb_object,
                ref_obj=self.ref_obj,
                c_val=self.clearance_val,
                margin=self.margin_val
            )

        # To be called after clicking on the plot.

    def on_mouse_release(self, event):
        if self.app.is_legacy is False:
            event_pos = event.pos
            event_is_dragging = event.is_dragging
            right_button = 2
        else:
            event_pos = (event.xdata, event.ydata)
            event_is_dragging = self.app.plotcanvas.is_dragging
            right_button = 3

        event_pos = self.app.plotcanvas.translate_coords(event_pos)

        # do clear area only for left mouse clicks
        if event.button == 1:
            if self.first_click is False:
                self.first_click = True
                self.app.inform.emit('[WARNING_NOTCL] %s' % _("Click the end point of the filling area."))

                self.cursor_pos = self.app.plotcanvas.translate_coords(event_pos)
                if self.app.grid_status() == True:
                    self.cursor_pos = self.app.geo_editor.snap(event_pos[0], event_pos[1])
            else:
                self.app.inform.emit(_("Zone added. Click to start adding next zone or right click to finish."))

                if self.app.grid_status() == True:
                    curr_pos = self.app.geo_editor.snap(event_pos[0], event_pos[1])
                else:
                    curr_pos = (event_pos[0], event_pos[1])

                x0, y0 = self.cursor_pos[0], self.cursor_pos[1]
                x1, y1 = curr_pos[0], curr_pos[1]
                pt1 = (x0, y0)
                pt2 = (x1, y0)
                pt3 = (x1, y1)
                pt4 = (x0, y1)

                self.sel_rect.append(Polygon([pt1, pt2, pt3, pt4]))
                self.first_click = False
                return

        elif event.button == right_button and self.mouse_is_dragging == False:
            self.app.delete_selection_shape()

            self.first_click = False

            if self.app.is_legacy is False:
                self.app.plotcanvas.graph_event_disconnect('mouse_release', self.on_mouse_release)
                self.app.plotcanvas.graph_event_disconnect('mouse_move', self.on_mouse_move)
            else:
                self.app.plotcanvas.graph_event_disconnect(self.mr)
                self.app.plotcanvas.graph_event_disconnect(self.mm)

            self.app.mp = self.app.plotcanvas.graph_event_connect('mouse_press',
                                                                  self.app.on_mouse_click_over_plot)
            self.app.mm = self.app.plotcanvas.graph_event_connect('mouse_move',
                                                                  self.app.on_mouse_move_over_plot)
            self.app.mr = self.app.plotcanvas.graph_event_connect('mouse_release',
                                                                  self.app.on_mouse_click_release_over_plot)

            if len(self.sel_rect) == 0:
                return

            self.sel_rect = cascaded_union(self.sel_rect)

            if not isinstance(self.sel_rect, Iterable):
                self.sel_rect = [self.sel_rect]

            self.on_copper_fill(
                fill_obj=self.grb_object,
                ref_obj=self.sel_rect,
                c_val=self.clearance_val,
                margin=self.margin_val
            )

    # called on mouse move
    def on_mouse_move(self, event):
        if self.app.is_legacy is False:
            event_pos = event.pos
            event_is_dragging = event.is_dragging
            right_button = 2
        else:
            event_pos = (event.xdata, event.ydata)
            event_is_dragging = self.app.plotcanvas.is_dragging
            right_button = 3

        curr_pos = self.app.plotcanvas.translate_coords(event_pos)

        # detect mouse dragging motion
        if event_is_dragging is True:
            self.mouse_is_dragging = True
        else:
            self.mouse_is_dragging = False

        # update the cursor position
        if self.app.grid_status() == True:
            # Update cursor
            curr_pos = self.app.geo_editor.snap(curr_pos[0], curr_pos[1])

            self.app.app_cursor.set_data(np.asarray([(curr_pos[0], curr_pos[1])]),
                                         symbol='++', edge_color=self.app.cursor_color_3D,
                                         size=self.app.defaults["global_cursor_size"])

        # update the positions on status bar
        self.app.ui.position_label.setText("&nbsp;&nbsp;&nbsp;&nbsp;<b>X</b>: %.4f&nbsp;&nbsp;   "
                                           "<b>Y</b>: %.4f" % (curr_pos[0], curr_pos[1]))
        if self.cursor_pos is None:
            self.cursor_pos = (0, 0)

        dx = curr_pos[0] - float(self.cursor_pos[0])
        dy = curr_pos[1] - float(self.cursor_pos[1])
        self.app.ui.rel_position_label.setText("<b>Dx</b>: %.4f&nbsp;&nbsp;  <b>Dy</b>: "
                                               "%.4f&nbsp;&nbsp;&nbsp;&nbsp;" % (dx, dy))

        # draw the utility geometry
        if self.first_click:
            self.app.delete_selection_shape()
            self.app.draw_moving_selection_shape(old_coords=(self.cursor_pos[0], self.cursor_pos[1]),
                                                 coords=(curr_pos[0], curr_pos[1]))

    def on_copper_fill(self, fill_obj, ref_obj=None, c_val=None, margin=None, run_threaded=True):
        """

        :param fill_obj:
        :param ref_obj:
        :param c_val:
        :param margin:
        :param run_threaded:
        :return:
        """

        if run_threaded:
            proc = self.app.proc_container.new('%s ...' % _("Copper filling"))
        else:
            self.app.proc_container.view.set_busy('%s ...' % _("Copper filling"))
            QtWidgets.QApplication.processEvents()

        # #####################################################################
        # ####### Read the parameters #########################################
        # #####################################################################

        log.debug("Copper Filling Tool started. Reading parameters.")
        self.app.inform.emit(_("Copper Filling Tool started. Reading parameters."))

        units = self.app.ui.general_defaults_form.general_app_group.units_radio.get_value()
        ref_selected = self.reference_radio.get_value()
        if c_val is None:
            c_val = float(self.app.defaults["tools_copperfill_clearance"])
        if margin is None:
            margin = float(self.app.defaults["tools_copperfill_margin"])

        # make sure that the source object solid geometry is an Iterable
        if not isinstance(self.grb_object.solid_geometry, Iterable):
            self.grb_object.solid_geometry = [self.grb_object.solid_geometry]

        # #########################################################################################
        # Prepare isolation polygon. This will create the clearance over the Gerber features ######
        # #########################################################################################
        log.debug("Copper Filling Tool. Preparing isolation polygons.")
        self.app.inform.emit(_("Copper Filling Tool. Preparing isolation polygons."))

        # variables to display the percentage of work done
        geo_len = 0
        try:
            for pol in self.grb_object.solid_geometry:
                geo_len += 1
        except TypeError:
            geo_len = 1

        old_disp_number = 0
        pol_nr = 0

        clearance_geometry = []
        try:
            for pol in self.grb_object.solid_geometry:
                if self.app.abort_flag:
                    # graceful abort requested by the user
                    raise FlatCAMApp.GracefulException

                clearance_geometry.append(
                    pol.buffer(c_val, int(int(self.geo_steps_per_circle) / 4))
                )

                pol_nr += 1
                disp_number = int(np.interp(pol_nr, [0, geo_len], [0, 100]))

                if old_disp_number < disp_number <= 100:
                    self.app.proc_container.update_view_text(' %s ... %d%%' %
                                                             (_("Buffering"), int(disp_number)))
                    old_disp_number = disp_number
        except TypeError:
            # taking care of the case when the self.solid_geometry is just a single Polygon, not a list or a
            # MultiPolygon (not an iterable)
            clearance_geometry.append(
                self.grb_object.solid_geometry.buffer(c_val, int(int(self.geo_steps_per_circle) / 4))
            )

        self.app.proc_container.update_view_text(' %s' % _("Buffering"))
        clearance_geometry = unary_union(clearance_geometry)

        # #########################################################################################
        # Prepare the area to fill with copper. ###################################################
        # #########################################################################################
        log.debug("Copper Filling Tool. Preparing areas to fill with copper.")
        self.app.inform.emit(_("Copper Filling Tool. Preparing areas to fill with copper."))

        try:
            if ref_obj is None or ref_obj == 'itself':
                working_obj = fill_obj
            else:
                working_obj = ref_obj
        except Exception as e:
            log.debug("ToolCopperFIll.on_copper_fill() --> %s" % str(e))
            return 'fail'

        bounding_box = None
        if ref_selected == 'itself':
            geo_n = working_obj.solid_geometry

            try:
                if isinstance(geo_n, MultiPolygon):
                    env_obj = geo_n.convex_hull
                elif (isinstance(geo_n, MultiPolygon) and len(geo_n) == 1) or \
                        (isinstance(geo_n, list) and len(geo_n) == 1) and isinstance(geo_n[0], Polygon):
                    env_obj = cascaded_union(geo_n)
                else:
                    env_obj = cascaded_union(geo_n)
                    env_obj = env_obj.convex_hull

                bounding_box = env_obj.buffer(distance=margin, join_style=base.JOIN_STYLE.mitre)
            except Exception as e:
                log.debug("ToolCopperFIll.on_copper_fill()  'itself'  --> %s" % str(e))
                self.app.inform.emit('[ERROR_NOTCL] %s' % _("No object available."))
                return 'fail'

        elif ref_selected == 'area':
            geo_n = cascaded_union(working_obj)
            try:
                __ = iter(geo_n)
            except Exception as e:
                log.debug("ToolCopperFIll.on_copper_fill() 'area' --> %s" % str(e))
                geo_n = [geo_n]

            geo_buff_list = []
            for poly in geo_n:
                if self.app.abort_flag:
                    # graceful abort requested by the user
                    raise FlatCAMApp.GracefulException
                geo_buff_list.append(poly.buffer(distance=0.0, join_style=base.JOIN_STYLE.mitre))

            bounding_box = cascaded_union(geo_buff_list)

        elif ref_selected == 'box':
            geo_n = working_obj.solid_geometry

            if isinstance(working_obj, FlatCAMGeometry):
                try:
                    __ = iter(geo_n)
                except Exception as e:
                    log.debug("ToolCopperFIll.on_copper_fill() 'box' --> %s" % str(e))
                    geo_n = [geo_n]

                geo_buff_list = []
                for poly in geo_n:
                    if self.app.abort_flag:
                        # graceful abort requested by the user
                        raise FlatCAMApp.GracefulException
                    geo_buff_list.append(poly.buffer(distance=margin, join_style=base.JOIN_STYLE.mitre))

                bounding_box = cascaded_union(geo_buff_list)
            elif isinstance(working_obj, FlatCAMGerber):
                geo_n = cascaded_union(geo_n).convex_hull
                bounding_box = cascaded_union(self.ncc_obj.solid_geometry).convex_hull.intersection(geo_n)
                bounding_box = bounding_box.buffer(distance=margin, join_style=base.JOIN_STYLE.mitre)
            else:
                self.app.inform.emit('[ERROR_NOTCL] %s' % _("The reference object type is not supported."))
                return 'fail'

        log.debug("Copper Filling Tool. Finished creating areas to fill with copper.")

        self.app.inform.emit(_("Copper Filling Tool. Appending new geometry and buffering."))
        new_solid_geometry = bounding_box.difference(clearance_geometry)

        geo_list = self.grb_object.solid_geometry
        if isinstance(self.grb_object.solid_geometry, MultiPolygon):
            geo_list = list(self.grb_object.solid_geometry.geoms)

        if '0' not in self.grb_object.apertures:
            self.grb_object.apertures['0'] = dict()
            self.grb_object.apertures['0']['geometry'] = list()
            self.grb_object.apertures['0']['type'] = 'REG'
            self.grb_object.apertures['0']['size'] = 0.0

        try:
            for poly in new_solid_geometry:
                # append to the new solid geometry
                geo_list.append(poly)

                # append into the '0' aperture
                geo_elem = dict()
                geo_elem['solid'] = poly
                geo_elem['follow'] = poly.exterior
                self.grb_object.apertures['0']['geometry'].append(deepcopy(geo_elem))
        except TypeError:
            # append to the new solid geometry
            geo_list.append(new_solid_geometry)

            # append into the '0' aperture
            geo_elem = dict()
            geo_elem['solid'] = new_solid_geometry
            geo_elem['follow'] = new_solid_geometry.exterior
            self.grb_object.apertures['0']['geometry'].append(deepcopy(geo_elem))

        self.grb_object.solid_geometry = MultiPolygon(geo_list).buffer(0.0000001).buffer(-0.0000001)

        # update the source file with the new geometry:
        self.grb_object.source_file = self.app.export_gerber(obj_name=self.grb_object.options['name'], filename=None,
                                                             local_use=self.grb_object, use_thread=False)

        self.on_exit()
        self.app.inform.emit('[success] %s' % _("Copper Fill Tool done."))

    def replot(self, obj):
        def worker_task():
            with self.app.proc_container.new('%s...' % _("Plotting")):
                obj.plot()

        self.app.worker_task.emit({'fcn': worker_task, 'params': []})

    def on_exit(self):
        # plot the object
        self.replot(obj=self.grb_object)

        # update the bounding box values
        try:
            a, b, c, d = self.grb_object.bounds()
            self.grb_object.options['xmin'] = a
            self.grb_object.options['ymin'] = b
            self.grb_object.options['xmax'] = c
            self.grb_object.options['ymax'] = d
        except Exception as e:
            log.debug("ToolCopperFill.on_exit() bounds error --> %s" % str(e))

        # reset the variables
        self.grb_object = None
        self.ref_obj = None
        self.sel_rect = list()

        # Events ID
        self.mr = None
        self.mm = None

        # Mouse cursor positions
        self.mouse_is_dragging = False
        self.cursor_pos = (0, 0)
        self.first_click = False