FlatCAM/FlatCAMObj.py

from cStringIO import StringIO
from PyQt4 import QtCore
from copy import copy
from ObjectUI import *
import FlatCAMApp
import inspect  # TODO: For debugging only.
from camlib import *
from FlatCAMCommon import LoudDict
from FlatCAMDraw import FlatCAMDraw


########################################
##            FlatCAMObj              ##
########################################
class FlatCAMObj(QtCore.QObject):
    """
    Base type of objects handled in FlatCAM. These become interactive
    in the GUI, can be plotted, and their options can be modified
    by the user in their respective forms.
    """

    # Instance of the application to which these are related.
    # The app should set this value.
    app = None

    def __init__(self, name):
        """

        :param name: Name of the object given by the user.
        :return: FlatCAMObj
        """
        QtCore.QObject.__init__(self)

        # View
        self.ui = None

        self.options = LoudDict(name=name)
        self.options.set_change_callback(self.on_options_change)

        self.form_fields = {}

        self.axes = None  # Matplotlib axes
        self.kind = None  # Override with proper name

        self.muted_ui = False

        # assert isinstance(self.ui, ObjectUI)
        # self.ui.name_entry.returnPressed.connect(self.on_name_activate)
        # self.ui.offset_button.clicked.connect(self.on_offset_button_click)
        # self.ui.scale_button.clicked.connect(self.on_scale_button_click)

    def on_options_change(self, key):
        self.emit(QtCore.SIGNAL("optionChanged"), key)

    def set_ui(self, ui):
        self.ui = ui

        self.form_fields = {"name": self.ui.name_entry}

        assert isinstance(self.ui, ObjectUI)
        self.ui.name_entry.returnPressed.connect(self.on_name_activate)
        self.ui.offset_button.clicked.connect(self.on_offset_button_click)
        self.ui.scale_button.clicked.connect(self.on_scale_button_click)

    def __str__(self):
        return "<FlatCAMObj({:12s}): {:20s}>".format(self.kind, self.options["name"])

    def on_name_activate(self):
        old_name = copy(self.options["name"])
        new_name = self.ui.name_entry.get_value()
        self.options["name"] = self.ui.name_entry.get_value()
        self.app.info("Name changed from %s to %s" % (old_name, new_name))

    def on_offset_button_click(self):
        self.app.report_usage("obj_on_offset_button")

        self.read_form()
        vect = self.ui.offsetvector_entry.get_value()
        self.offset(vect)
        self.plot()

    def on_scale_button_click(self):
        self.app.report_usage("obj_on_scale_button")
        self.read_form()
        factor = self.ui.scale_entry.get_value()
        self.scale(factor)
        self.plot()

    def setup_axes(self, figure):
        """
        1) Creates axes if they don't exist. 2) Clears axes. 3) Attaches
        them to figure if not part of the figure. 4) Sets transparent
        background. 5) Sets 1:1 scale aspect ratio.

        :param figure: A Matplotlib.Figure on which to add/configure axes.
        :type figure: matplotlib.figure.Figure
        :return: None
        :rtype: None
        """

        if self.axes is None:
            FlatCAMApp.App.log.debug("setup_axes(): New axes")
            self.axes = figure.add_axes([0.05, 0.05, 0.9, 0.9],
                                        label=self.options["name"])
        elif self.axes not in figure.axes:
            FlatCAMApp.App.log.debug("setup_axes(): Clearing and attaching axes")
            self.axes.cla()
            figure.add_axes(self.axes)
        else:
            FlatCAMApp.App.log.debug("setup_axes(): Clearing Axes")
            self.axes.cla()

        # Remove all decoration. The app's axes will have
        # the ticks and grid.
        self.axes.set_frame_on(False)  # No frame
        self.axes.set_xticks([])  # No tick
        self.axes.set_yticks([])  # No ticks
        self.axes.patch.set_visible(False)  # No background
        self.axes.set_aspect(1)

    def to_form(self):
        """
        Copies options to the UI form.

        :return: None
        """
        FlatCAMApp.App.log.debug(str(inspect.stack()[1][3]) + "--> FlatCAMObj.to_form()")
        for option in self.options:
            try:
                self.set_form_item(option)
            except:
                self.app.log.warning("Unexpected error:", sys.exc_info())

    def read_form(self):
        """
        Reads form into ``self.options``.

        :return: None
        :rtype: None
        """
        FlatCAMApp.App.log.debug(str(inspect.stack()[1][3]) + "--> FlatCAMObj.read_form()")
        for option in self.options:
            try:
                self.read_form_item(option)
            except:
                self.app.log.warning("Unexpected error:", sys.exc_info())

    def build_ui(self):
        """
        Sets up the UI/form for this object. Show the UI
        in the App.

        :return: None
        :rtype: None
        """

        self.muted_ui = True
        FlatCAMApp.App.log.debug(str(inspect.stack()[1][3]) + "--> FlatCAMObj.build_ui()")

        # Remove anything else in the box
        # box_children = self.app.ui.notebook.selected_contents.get_children()
        # for child in box_children:
        #     self.app.ui.notebook.selected_contents.remove(child)
        # while self.app.ui.selected_layout.count():
        #     self.app.ui.selected_layout.takeAt(0)

        # Put in the UI
        # box_selected.pack_start(sw, True, True, 0)
        # self.app.ui.notebook.selected_contents.add(self.ui)
        # self.app.ui.selected_layout.addWidget(self.ui)
        try:
            self.app.ui.selected_scroll_area.takeWidget()
        except:
            self.app.log.debug("Nothing to remove")
        self.app.ui.selected_scroll_area.setWidget(self.ui)
        self.to_form()

        self.muted_ui = False

    def set_form_item(self, option):
        """
        Copies the specified option to the UI form.

        :param option: Name of the option (Key in ``self.options``).
        :type option: str
        :return: None
        """

        try:
            self.form_fields[option].set_value(self.options[option])
        except KeyError:
            self.app.log.warn("Tried to set an option or field that does not exist: %s" % option)

    def read_form_item(self, option):
        """
        Reads the specified option from the UI form into ``self.options``.

        :param option: Name of the option.
        :type option: str
        :return: None
        """

        try:
            self.options[option] = self.form_fields[option].get_value()
        except KeyError:
            self.app.log.warning("Failed to read option from field: %s" % option)

        # #try read field only when option have equivalent in form_fields
        # if option in self.form_fields:
        #     option_type=type(self.options[option])
        #     try:
        #         value=self.form_fields[option].get_value()
        #     #catch per option as it was ignored anyway, also when syntax error (probably uninitialized field),don't read either.
        #     except (KeyError,SyntaxError):
        #         self.app.log.warning("Failed to read option from field: %s" % option)
        # else:
        #     self.app.log.warning("Form fied does not exists: %s" % option)

    def plot(self):
        """
        Plot this object (Extend this method to implement the actual plotting).
        Axes get created, appended to canvas and cleared before plotting.
        Call this in descendants before doing the plotting.

        :return: Whether to continue plotting or not depending on the "plot" option.
        :rtype: bool
        """
        FlatCAMApp.App.log.debug(str(inspect.stack()[1][3]) + " --> FlatCAMObj.plot()")

        # Axes must exist and be attached to canvas.
        if self.axes is None or self.axes not in self.app.plotcanvas.figure.axes:
            self.axes = self.app.plotcanvas.new_axes(self.options['name'])

        if not self.options["plot"]:
            self.axes.cla()
            self.app.plotcanvas.auto_adjust_axes()
            return False

        # Clear axes or we will plot on top of them.
        self.axes.cla()  # TODO: Thread safe?
        return True

    def serialize(self):
        """
        Returns a representation of the object as a dictionary so
        it can be later exported as JSON. Override this method.

        :return: Dictionary representing the object
        :rtype: dict
        """
        return

    def deserialize(self, obj_dict):
        """
        Re-builds an object from its serialized version.

        :param obj_dict: Dictionary representing a FlatCAMObj
        :type obj_dict: dict
        :return: None
        """
        return


class FlatCAMGerber(FlatCAMObj, Gerber):
    """
    Represents Gerber code.
    """

    ui_type = GerberObjectUI

    def __init__(self, name):
        Gerber.__init__(self)
        FlatCAMObj.__init__(self, name)

        self.kind = "gerber"

        # The 'name' is already in self.options from FlatCAMObj
        # Automatically updates the UI
        self.options.update({
            "plot": True,
            "multicolored": False,
            "solid": False,
            "isotooldia": 0.016,
            "isopasses": 1,
            "isooverlap": 0.15,
            "combine_passes": True,
            "cutouttooldia": 0.07,
            "cutoutmargin": 0.2,
            "cutoutgapsize": 0.15,
            "gaps": "tb",
            "noncoppermargin": 0.0,
            "noncopperrounded": False,
            "bboxmargin": 0.0,
            "bboxrounded": False
        })

        # Attributes to be included in serialization
        # Always append to it because it carries contents
        # from predecessors.
        self.ser_attrs += ['options', 'kind']

        # assert isinstance(self.ui, GerberObjectUI)
        # self.ui.plot_cb.stateChanged.connect(self.on_plot_cb_click)
        # self.ui.solid_cb.stateChanged.connect(self.on_solid_cb_click)
        # self.ui.multicolored_cb.stateChanged.connect(self.on_multicolored_cb_click)
        # self.ui.generate_iso_button.clicked.connect(self.on_iso_button_click)
        # self.ui.generate_cutout_button.clicked.connect(self.on_generatecutout_button_click)
        # self.ui.generate_bb_button.clicked.connect(self.on_generatebb_button_click)
        # self.ui.generate_noncopper_button.clicked.connect(self.on_generatenoncopper_button_click)

    def set_ui(self, ui):
        """
        Maps options with GUI inputs.
        Connects GUI events to methods.

        :param ui: GUI object.
        :type ui: GerberObjectUI
        :return: None
        """
        FlatCAMObj.set_ui(self, ui)

        FlatCAMApp.App.log.debug("FlatCAMGerber.set_ui()")

        self.form_fields.update({
            "plot": self.ui.plot_cb,
            "multicolored": self.ui.multicolored_cb,
            "solid": self.ui.solid_cb,
            "isotooldia": self.ui.iso_tool_dia_entry,
            "isopasses": self.ui.iso_width_entry,
            "isooverlap": self.ui.iso_overlap_entry,
            "combine_passes": self.ui.combine_passes_cb,
            "cutouttooldia": self.ui.cutout_tooldia_entry,
            "cutoutmargin": self.ui.cutout_margin_entry,
            "cutoutgapsize": self.ui.cutout_gap_entry,
            "gaps": self.ui.gaps_radio,
            "noncoppermargin": self.ui.noncopper_margin_entry,
            "noncopperrounded": self.ui.noncopper_rounded_cb,
            "bboxmargin": self.ui.bbmargin_entry,
            "bboxrounded": self.ui.bbrounded_cb
        })

        assert isinstance(self.ui, GerberObjectUI)
        self.ui.plot_cb.stateChanged.connect(self.on_plot_cb_click)
        self.ui.solid_cb.stateChanged.connect(self.on_solid_cb_click)
        self.ui.multicolored_cb.stateChanged.connect(self.on_multicolored_cb_click)
        self.ui.generate_iso_button.clicked.connect(self.on_iso_button_click)
        self.ui.generate_cutout_button.clicked.connect(self.on_generatecutout_button_click)
        self.ui.generate_bb_button.clicked.connect(self.on_generatebb_button_click)
        self.ui.generate_noncopper_button.clicked.connect(self.on_generatenoncopper_button_click)

    def on_generatenoncopper_button_click(self, *args):
        self.app.report_usage("gerber_on_generatenoncopper_button")

        self.read_form()
        name = self.options["name"] + "_noncopper"

        def geo_init(geo_obj, app_obj):
            assert isinstance(geo_obj, FlatCAMGeometry)
            bounding_box = self.solid_geometry.envelope.buffer(self.options["noncoppermargin"])
            if not self.options["noncopperrounded"]:
                bounding_box = bounding_box.envelope
            non_copper = bounding_box.difference(self.solid_geometry)
            geo_obj.solid_geometry = non_copper

        # TODO: Check for None
        self.app.new_object("geometry", name, geo_init)

    def on_generatebb_button_click(self, *args):
        self.app.report_usage("gerber_on_generatebb_button")
        self.read_form()
        name = self.options["name"] + "_bbox"

        def geo_init(geo_obj, app_obj):
            assert isinstance(geo_obj, FlatCAMGeometry)
            # Bounding box with rounded corners
            bounding_box = self.solid_geometry.envelope.buffer(self.options["bboxmargin"])
            if not self.options["bboxrounded"]:  # Remove rounded corners
                bounding_box = bounding_box.envelope
            geo_obj.solid_geometry = bounding_box

        self.app.new_object("geometry", name, geo_init)

    def on_generatecutout_button_click(self, *args):
        self.app.report_usage("gerber_on_generatecutout_button")
        self.read_form()
        name = self.options["name"] + "_cutout"

        def geo_init(geo_obj, app_obj):
            margin = self.options["cutoutmargin"] + self.options["cutouttooldia"]/2
            gap_size = self.options["cutoutgapsize"] + self.options["cutouttooldia"]
            minx, miny, maxx, maxy = self.bounds()
            minx -= margin
            maxx += margin
            miny -= margin
            maxy += margin
            midx = 0.5 * (minx + maxx)
            midy = 0.5 * (miny + maxy)
            hgap = 0.5 * gap_size
            pts = [[midx - hgap, maxy],
                   [minx, maxy],
                   [minx, midy + hgap],
                   [minx, midy - hgap],
                   [minx, miny],
                   [midx - hgap, miny],
                   [midx + hgap, miny],
                   [maxx, miny],
                   [maxx, midy - hgap],
                   [maxx, midy + hgap],
                   [maxx, maxy],
                   [midx + hgap, maxy]]
            cases = {"tb": [[pts[0], pts[1], pts[4], pts[5]],
                            [pts[6], pts[7], pts[10], pts[11]]],
                     "lr": [[pts[9], pts[10], pts[1], pts[2]],
                            [pts[3], pts[4], pts[7], pts[8]]],
                     "4": [[pts[0], pts[1], pts[2]],
                           [pts[3], pts[4], pts[5]],
                           [pts[6], pts[7], pts[8]],
                           [pts[9], pts[10], pts[11]]]}
            cuts = cases[self.options['gaps']]
            geo_obj.solid_geometry = cascaded_union([LineString(segment) for segment in cuts])

        # TODO: Check for None
        self.app.new_object("geometry", name, geo_init)

    def on_iso_button_click(self, *args):
        self.app.report_usage("gerber_on_iso_button")
        self.read_form()
        self.isolate()

    def follow(self, outname=None):
        """
        Creates a geometry object "following" the gerber paths.

        :return: None
        """

        default_name = self.options["name"] + "_follow"
        follow_name = outname or default_name

        def follow_init(follow_obj, app_obj):
            # Propagate options
            follow_obj.options["cnctooldia"] = self.options["isotooldia"]
            follow_obj.solid_geometry = self.solid_geometry
            app_obj.info("Follow geometry created: %s" % follow_obj.options["name"])

        # TODO: Do something if this is None. Offer changing name?
        self.app.new_object("geometry", follow_name, follow_init)

    def isolate(self, dia=None, passes=None, overlap=None, outname=None, combine=None):
        """
        Creates an isolation routing geometry object in the project.

        :param dia: Tool diameter
        :param passes: Number of tool widths to cut
        :param overlap: Overlap between passes in fraction of tool diameter
        :param outname: Base name of the output object
        :return: None
        """
        if dia is None:
            dia = self.options["isotooldia"]
        if passes is None:
            passes = int(self.options["isopasses"])
        if overlap is None:
            overlap = self.options["isooverlap"]
        if combine is None:
            combine = self.options["combine_passes"]
        else:
            combine = bool(combine)

        base_name = self.options["name"] + "_iso"
        base_name = outname or base_name

        def generate_envelope(offset, invert):
            # isolation_geometry produces an envelope that is going on the left of the geometry
            # (the copper features). To leave the least amount of burrs on the features
            # the tool needs to travel on the right side of the features (this is called conventional milling)
            # the first pass is the one cutting all of the features, so it needs to be reversed
            # the other passes overlap preceding ones and cut the left over copper. It is better for them
            # to cut on the right side of the left over copper i.e on the left side of the features. 
            geom = self.isolation_geometry(offset)
            if invert:
                if type(geom) is MultiPolygon:
                    pl = []
                    for p in geom:
                        pl.append(Polygon(p.exterior.coords[::-1], p.interiors))
                    geom = MultiPolygon(pl)
                elif type(geom) is Polygon:
                    geom = Polygon(geom.exterior.coords[::-1], geom.interiors)
                else:
                    raise "Unexpected Geometry"
            return geom

        if combine:
            iso_name = base_name

            # TODO: This is ugly. Create way to pass data into init function.
            def iso_init(geo_obj, app_obj):
                # Propagate options
                geo_obj.options["cnctooldia"] = self.options["isotooldia"]
                geo_obj.solid_geometry = []
                for i in range(passes):
                    offset = (2 * i + 1) / 2.0 * dia - i * overlap * dia
                    geom = generate_envelope (offset, i == 0)
                    geo_obj.solid_geometry.append(geom)
                app_obj.info("Isolation geometry created: %s" % geo_obj.options["name"])

            # TODO: Do something if this is None. Offer changing name?
            self.app.new_object("geometry", iso_name, iso_init)

        else:
            for i in range(passes):

                offset = (2 * i + 1) / 2.0 * dia - i * overlap  * dia
                if passes > 1:
                    iso_name = base_name + str(i + 1)
                else:
                    iso_name = base_name

                # TODO: This is ugly. Create way to pass data into init function.
                def iso_init(geo_obj, app_obj):
                    # Propagate options
                    geo_obj.options["cnctooldia"] = self.options["isotooldia"]
                    geo_obj.solid_geometry = generate_envelope (offset, i == 0)
                    app_obj.info("Isolation geometry created: %s" % geo_obj.options["name"])

                # TODO: Do something if this is None. Offer changing name?
                self.app.new_object("geometry", iso_name, iso_init)

    def on_plot_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('plot')
        self.plot()

    def on_solid_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('solid')
        self.plot()

    def on_multicolored_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('multicolored')
        self.plot()

    def convert_units(self, units):
        """
        Converts the units of the object by scaling dimensions in all geometry
        and options.

        :param units: Units to which to convert the object: "IN" or "MM".
        :type units: str
        :return: None
        :rtype: None
        """

        factor = Gerber.convert_units(self, units)

        self.options['isotooldia'] *= factor
        self.options['cutoutmargin'] *= factor
        self.options['cutoutgapsize'] *= factor
        self.options['noncoppermargin'] *= factor
        self.options['bboxmargin'] *= factor

    def plot(self):

        FlatCAMApp.App.log.debug(str(inspect.stack()[1][3]) + " --> FlatCAMGerber.plot()")

        # Does all the required setup and returns False
        # if the 'ptint' option is set to False.
        if not FlatCAMObj.plot(self):
            return

        geometry = self.solid_geometry

        # Make sure geometry is iterable.
        try:
            _ = iter(geometry)
        except TypeError:
            geometry = [geometry]

        if self.options["multicolored"]:
            linespec = '-'
        else:
            linespec = 'k-'

        if self.options["solid"]:
            for poly in geometry:
                # TODO: Too many things hardcoded.
                try:
                    patch = PolygonPatch(poly,
                                         facecolor="#BBF268",
                                         edgecolor="#006E20",
                                         alpha=0.75,
                                         zorder=2)
                    self.axes.add_patch(patch)
                except AssertionError:
                    FlatCAMApp.App.log.warning("A geometry component was not a polygon:")
                    FlatCAMApp.App.log.warning(str(poly))
        else:
            for poly in geometry:
                x, y = poly.exterior.xy
                self.axes.plot(x, y, linespec)
                for ints in poly.interiors:
                    x, y = ints.coords.xy
                    self.axes.plot(x, y, linespec)

        self.app.plotcanvas.auto_adjust_axes()

    def serialize(self):
        return {
            "options": self.options,
            "kind": self.kind
        }


class FlatCAMExcellon(FlatCAMObj, Excellon):
    """
    Represents Excellon/Drill code.
    """

    ui_type = ExcellonObjectUI

    def __init__(self, name):
        Excellon.__init__(self)
        FlatCAMObj.__init__(self, name)

        self.kind = "excellon"

        self.options.update({
            "plot": True,
            "solid": False,
            "drillz": -0.1,
            "travelz": 0.1,
            "feedrate": 5.0,
            # "toolselection": ""
            "tooldia": 0.1,
            "toolchange": False,
            "toolchangez": 1.0,
            "spindlespeed": None
        })

        # TODO: Document this.
        self.tool_cbs = {}

        # Attributes to be included in serialization
        # Always append to it because it carries contents
        # from predecessors.
        self.ser_attrs += ['options', 'kind']

    @staticmethod
    def merge(exc_list, exc_final):
        """
        Merge excellons in exc_list into exc_final.
        Options are allways copied from source .

        Tools are also merged, if  name for  tool is same and   size differs, then as name is used next available  number from both lists

        if only one object is  specified in exc_list then this acts  as copy only

        :param exc_list: List or one object of FlatCAMExcellon Objects to join.
        :param exc_final: Destination FlatCAMExcellon object.
        :return: None
        """

        if type(exc_list) is not list:
            exc_list_real= list()
            exc_list_real.append(exc_list)
        else:
            exc_list_real=exc_list

        for exc in exc_list_real:
            # Expand lists
            if type(exc) is list:
                FlatCAMExcellon.merge(exc, exc_final)
            # If not list, merge excellons
            else:

                #    TODO: I realize forms does not save values into options , when  object is deselected
                #    leave this  here for future use
                #    this  reinitialize options based on forms, all steps may not be necessary
                #    exc.app.collection.set_active(exc.options['name'])
                #    exc.to_form()
                #    exc.read_form()
                for option in exc.options:
                    if option is not 'name':
                        try:
                            exc_final.options[option] = exc.options[option]
                        except:
                            exc.app.log.warning("Failed to copy option.",option)

                #deep copy of all drills,to avoid any references
                for drill in exc.drills:
                    point = Point(drill['point'].x,drill['point'].y)
                    exc_final.drills.append({"point": point, "tool": drill['tool']})
                toolsrework=dict()
                max_numeric_tool=0
                for toolname in exc.tools.iterkeys():
                    numeric_tool=int(toolname)
                    if numeric_tool>max_numeric_tool:
                        max_numeric_tool=numeric_tool
                    toolsrework[exc.tools[toolname]['C']]=toolname

                #exc_final as last because names from final tools will be used
                for toolname in exc_final.tools.iterkeys():
                    numeric_tool=int(toolname)
                    if numeric_tool>max_numeric_tool:
                        max_numeric_tool=numeric_tool
                    toolsrework[exc_final.tools[toolname]['C']]=toolname

                for toolvalues in toolsrework.iterkeys():
                    if toolsrework[toolvalues] in exc_final.tools:
                        if exc_final.tools[toolsrework[toolvalues]]!={"C": toolvalues}:
                            exc_final.tools[str(max_numeric_tool+1)]={"C": toolvalues}
                    else:
                        exc_final.tools[toolsrework[toolvalues]]={"C": toolvalues}
                #this value  was not co
                exc_final.zeros=exc.zeros
                exc_final.create_geometry()

    def build_ui(self):
        FlatCAMObj.build_ui(self)

        # Populate tool list
        n = len(self.tools)
        self.ui.tools_table.setColumnCount(2)
        self.ui.tools_table.setHorizontalHeaderLabels(['#', 'Diameter'])
        self.ui.tools_table.setRowCount(n)
        self.ui.tools_table.setSortingEnabled(False)
        i = 0
        for tool in self.tools:
            id = QtGui.QTableWidgetItem(tool)
            id.setFlags(QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled)
            self.ui.tools_table.setItem(i, 0, id)  # Tool name/id
            dia = QtGui.QTableWidgetItem(str(self.tools[tool]['C']))
            dia.setFlags(QtCore.Qt.ItemIsEnabled)
            self.ui.tools_table.setItem(i, 1, dia)  # Diameter
            i += 1
        
        # sort the tool diameter column
        self.ui.tools_table.sortItems(1)
        # all the tools are selected by default
        self.ui.tools_table.selectColumn(0)
        
        self.ui.tools_table.resizeColumnsToContents()
        self.ui.tools_table.resizeRowsToContents()
        self.ui.tools_table.horizontalHeader().setStretchLastSection(True)
        self.ui.tools_table.verticalHeader().hide()
        self.ui.tools_table.setSortingEnabled(True)

    def set_ui(self, ui):
        """
        Configures the user interface for this object.
        Connects options to form fields.

        :param ui: User interface object.
        :type ui: ExcellonObjectUI
        :return: None
        """
        FlatCAMObj.set_ui(self, ui)

        FlatCAMApp.App.log.debug("FlatCAMExcellon.set_ui()")

        self.form_fields.update({
            "plot": self.ui.plot_cb,
            "solid": self.ui.solid_cb,
            "drillz": self.ui.cutz_entry,
            "travelz": self.ui.travelz_entry,
            "feedrate": self.ui.feedrate_entry,
            "tooldia": self.ui.tooldia_entry,
            "toolchange": self.ui.toolchange_cb,
            "toolchangez": self.ui.toolchangez_entry,
            "spindlespeed": self.ui.spindlespeed_entry
        })

        assert isinstance(self.ui, ExcellonObjectUI), \
            "Expected a ExcellonObjectUI, got %s" % type(self.ui)
        self.ui.plot_cb.stateChanged.connect(self.on_plot_cb_click)
        self.ui.solid_cb.stateChanged.connect(self.on_solid_cb_click)
        self.ui.generate_cnc_button.clicked.connect(self.on_create_cncjob_button_click)
        self.ui.generate_milling_button.clicked.connect(self.on_generate_milling_button_click)

    def get_selected_tools_list(self):
        """
        Returns the keys to the self.tools dictionary corresponding
        to the selections on the tool list in the GUI.

        :return: List of tools.
        :rtype: list
        """
        return [str(x.text()) for x in self.ui.tools_table.selectedItems()]

    def generate_milling(self, tools=None, outname=None, tooldia=None):
        """
        Note: This method is a good template for generic operations as
        it takes it's options from parameters or otherwise from the
        object's options and returns a success, msg tuple as feedback
        for shell operations.

        :return: Success/failure condition tuple (bool, str).
        :rtype: tuple
        """

        # Get the tools from the list. These are keys
        # to self.tools
        if tools is None:
            tools = self.get_selected_tools_list()

        if outname is None:
            outname = self.options["name"] + "_mill"

        if tooldia is None:
            tooldia = self.options["tooldia"]

        if len(tools) == 0:
            self.app.inform.emit("Please select one or more tools from the list and try again.")
            return False, "Error: No tools."

        for tool in tools:
            if self.tools[tool]["C"] < tooldia:
                self.app.inform.emit("[warning] Milling tool is larger than hole size. Cancelled.")
                return False, "Error: Milling tool is larger than hole."

        def geo_init(geo_obj, app_obj):
            assert isinstance(geo_obj, FlatCAMGeometry), \
                "Initializer expected a FlatCAMGeometry, got %s" % type(geo_obj)
            app_obj.progress.emit(20)

            geo_obj.solid_geometry = []

            for hole in self.drills:
                if hole['tool'] in tools:
                    geo_obj.solid_geometry.append(
                        Point(hole['point']).buffer(self.tools[hole['tool']]["C"] / 2 -
                                                    tooldia / 2).exterior
                    )

        def geo_thread(app_obj):
            app_obj.new_object("geometry", outname, geo_init)
            app_obj.progress.emit(100)

        # Create a promise with the new name
        self.app.collection.promise(outname)

        # Send to worker
        self.app.worker_task.emit({'fcn': geo_thread, 'params': [self.app]})

        return True, ""

    def on_generate_milling_button_click(self, *args):
        self.app.report_usage("excellon_on_create_milling_button")
        self.read_form()

        self.generate_milling()

    def on_create_cncjob_button_click(self, *args):
        self.app.report_usage("excellon_on_create_cncjob_button")
        self.read_form()

        # Get the tools from the list
        tools = self.get_selected_tools_list()

        if len(tools) == 0:
            self.app.inform.emit("Please select one or more tools from the list and try again.")
            return

        job_name = self.options["name"] + "_cnc"

        # Object initialization function for app.new_object()
        def job_init(job_obj, app_obj):
            assert isinstance(job_obj, FlatCAMCNCjob), \
                "Initializer expected a FlatCAMCNCjob, got %s" % type(job_obj)

            app_obj.progress.emit(20)
            job_obj.z_cut = self.options["drillz"]
            job_obj.z_move = self.options["travelz"]
            job_obj.feedrate = self.options["feedrate"]
            job_obj.spindlespeed = self.options["spindlespeed"]
            # There could be more than one drill size...
            # job_obj.tooldia =   # TODO: duplicate variable!
            # job_obj.options["tooldia"] =

            tools_csv = ','.join(tools)
            job_obj.generate_from_excellon_by_tool(self, tools_csv,
                                                   toolchange=self.options["toolchange"],
                                                   toolchangez=self.options["toolchangez"])

            app_obj.progress.emit(50)
            job_obj.gcode_parse()

            app_obj.progress.emit(60)
            job_obj.create_geometry()

            app_obj.progress.emit(80)

        # To be run in separate thread
        def job_thread(app_obj):
            app_obj.new_object("cncjob", job_name, job_init)
            app_obj.progress.emit(100)

        # Create promise for the new name.
        self.app.collection.promise(job_name)

        # Send to worker
        # self.app.worker.add_task(job_thread, [self.app])
        self.app.worker_task.emit({'fcn': job_thread, 'params': [self.app]})

    def on_plot_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('plot')
        self.plot()

    def on_solid_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('solid')
        self.plot()

    def convert_units(self, units):
        factor = Excellon.convert_units(self, units)

        self.options['drillz'] *= factor
        self.options['travelz'] *= factor
        self.options['feedrate'] *= factor

    def plot(self):

        # Does all the required setup and returns False
        # if the 'ptint' option is set to False.
        if not FlatCAMObj.plot(self):
            return

        try:
            _ = iter(self.solid_geometry)
        except TypeError:
            self.solid_geometry = [self.solid_geometry]

        # Plot excellon (All polygons?)
        if self.options["solid"]:
            for geo in self.solid_geometry:
                patch = PolygonPatch(geo,
                                     facecolor="#C40000",
                                     edgecolor="#750000",
                                     alpha=0.75,
                                     zorder=3)
                self.axes.add_patch(patch)
        else:
            for geo in self.solid_geometry:
                x, y = geo.exterior.coords.xy
                self.axes.plot(x, y, 'r-')
                for ints in geo.interiors:
                    x, y = ints.coords.xy
                    self.axes.plot(x, y, 'g-')

        self.app.plotcanvas.auto_adjust_axes()


class FlatCAMCNCjob(FlatCAMObj, CNCjob):
    """
    Represents G-Code.
    """

    ui_type = CNCObjectUI

    def __init__(self, name, units="in", kind="generic", z_move=0.1,
                 feedrate=3.0, z_cut=-0.002, tooldia=0.0,
                 spindlespeed=None):

        FlatCAMApp.App.log.debug("Creating CNCJob object...")

        CNCjob.__init__(self, units=units, kind=kind, z_move=z_move,
                        feedrate=feedrate, z_cut=z_cut, tooldia=tooldia,
                        spindlespeed=spindlespeed)

        FlatCAMObj.__init__(self, name)

        self.kind = "cncjob"

        self.options.update({
            "plot": True,
            "tooldia": 0.4 / 25.4,  # 0.4mm in inches
            "append": "",
            "prepend": "",
            "dwell": False,
            "dwelltime": 1
        })

        # Attributes to be included in serialization
        # Always append to it because it carries contents
        # from predecessors.
        self.ser_attrs += ['options', 'kind']

    def set_ui(self, ui):
        FlatCAMObj.set_ui(self, ui)

        FlatCAMApp.App.log.debug("FlatCAMCNCJob.set_ui()")

        assert isinstance(self.ui, CNCObjectUI), \
            "Expected a CNCObjectUI, got %s" % type(self.ui)

        self.form_fields.update({
            "plot": self.ui.plot_cb,
            "tooldia": self.ui.tooldia_entry,
            "append": self.ui.append_text,
            "prepend": self.ui.prepend_text,
            "dwell": self.ui.dwell_cb,
            "dwelltime": self.ui.dwelltime_entry
        })

        self.ui.plot_cb.stateChanged.connect(self.on_plot_cb_click)
        self.ui.updateplot_button.clicked.connect(self.on_updateplot_button_click)
        self.ui.export_gcode_button.clicked.connect(self.on_exportgcode_button_click)

    def on_updateplot_button_click(self, *args):
        """
        Callback for the "Updata Plot" button. Reads the form for updates
        and plots the object.
        """
        self.read_form()
        self.plot()

    def on_exportgcode_button_click(self, *args):
        self.app.report_usage("cncjob_on_exportgcode_button")

        self.read_form()

        try:
            filename = QtGui.QFileDialog.getSaveFileName(caption="Export G-Code ...",
                                                         directory=self.app.defaults["last_folder"])
        except TypeError:
            filename = QtGui.QFileDialog.getSaveFileName(caption="Export G-Code ...")

        preamble = str(self.ui.prepend_text.get_value())
        postamble = str(self.ui.append_text.get_value())

        self.export_gcode(filename, preamble=preamble, postamble=postamble)

    def dwell_generator(self, lines):
        """
        Inserts "G4 P..." instructions after spindle-start
        instructions (M03 or M04).

        """

        log.debug("dwell_generator()...")

        m3m4re = re.compile(r'^\s*[mM]0[34]')
        g4re = re.compile(r'^\s*[gG]4\s+([\d\.\+\-e]+)')
        bufline = None

        for line in lines:
            # If the buffer contains a G4, yield that.
            # If current line is a G4, discard it.
            if bufline is not None:
                yield bufline
                bufline = None

                if not g4re.search(line):
                    yield line

                continue

            # If start spindle, buffer a G4.
            if m3m4re.search(line):
                log.debug("Found M03/4")
                bufline = "G4 P{}\n".format(self.options['dwelltime'])

            yield line

        raise StopIteration

    def export_gcode(self, filename, preamble='', postamble=''):

        lines = StringIO(self.gcode)

        ## Post processing
        # Dwell?
        if self.options['dwell']:
            log.debug("Will add G04!")
            lines = self.dwell_generator(lines)

        ## Write
        with open(filename, 'w') as f:
            f.write(preamble + "\n")

            for line in lines:

                f.write(line)

            f.write(postamble)

        # Just for adding it to the recent files list.
        self.app.file_opened.emit("cncjob", filename)

        self.app.inform.emit("Saved to: " + filename)

    def get_gcode(self, preamble='', postamble=''):
        #we need this to beable get_gcode separatelly for shell command export_code
        return preamble + '\n' + self.gcode + "\n" + postamble

    def on_plot_cb_click(self, *args):
        if self.muted_ui:
            return
        self.read_form_item('plot')
        self.plot()

    def plot(self):

        # Does all the required setup and returns False
        # if the 'ptint' option is set to False.
        if not FlatCAMObj.plot(self):
            return

        self.plot2(self.axes, tooldia=self.options["tooldia"])

        self.app.plotcanvas.auto_adjust_axes()

    def convert_units(self, units):
        factor = CNCjob.convert_units(self, units)
        FlatCAMApp.App.log.debug("FlatCAMCNCjob.convert_units()")
        self.options["tooldia"] *= factor


class FlatCAMGeometry(FlatCAMObj, Geometry):
    """
    Geometric object not associated with a specific
    format.
    """

    ui_type = GeometryObjectUI

    @staticmethod
    def merge(geo_list, geo_final):
        """
        Merges the geometry of objects in geo_list into
        the geometry of geo_final.

        :param geo_list: List of FlatCAMGeometry Objects to join.
        :param geo_final: Destination FlatCAMGeometry object.
        :return: None
        """

        if geo_final.solid_geometry is None:
            geo_final.solid_geometry = []
        if type(geo_final.solid_geometry) is not list:
            geo_final.solid_geometry = [geo_final.solid_geometry]

        for geo in geo_list:

            # Expand lists
            if type(geo) is list:
                FlatCAMGeometry.merge(geo, geo_final)

            # If not list, just append
            else:
                geo_final.solid_geometry.append(geo.solid_geometry)

            # try:  # Iterable
            #     for shape in geo.solid_geometry:
            #         geo_final.solid_geometry.append(shape)
            #
            # except TypeError:  # Non-iterable
            #     geo_final.solid_geometry.append(geo.solid_geometry)

    def __init__(self, name):
        FlatCAMObj.__init__(self, name)
        Geometry.__init__(self)

        self.kind = "geometry"

        self.options.update({
            "plot": True,
            "cutz": -0.002,
            "travelz": 0.1,
            "feedrate": 5.0,
            "spindlespeed": None,
            "cnctooldia": 0.4 / 25.4,
            "painttooldia": 0.0625,
            "paintoverlap": 0.15,
            "paintmargin": 0.01,
            "paintmethod": "standard",
            "multidepth": False,
            "depthperpass": 0.002
        })

        # Attributes to be included in serialization
        # Always append to it because it carries contents
        # from predecessors.
        self.ser_attrs += ['options', 'kind']

    def build_ui(self):
        FlatCAMObj.build_ui(self)

    def set_ui(self, ui):
        FlatCAMObj.set_ui(self, ui)

        FlatCAMApp.App.log.debug("FlatCAMGeometry.set_ui()")

        assert isinstance(self.ui, GeometryObjectUI), \
            "Expected a GeometryObjectUI, got %s" % type(self.ui)

        self.form_fields.update({
            "plot": self.ui.plot_cb,
            "cutz": self.ui.cutz_entry,
            "travelz": self.ui.travelz_entry,
            "feedrate": self.ui.cncfeedrate_entry,
            "spindlespeed": self.ui.cncspindlespeed_entry,
            "cnctooldia": self.ui.cnctooldia_entry,
            "painttooldia": self.ui.painttooldia_entry,
            "paintoverlap": self.ui.paintoverlap_entry,
            "paintmargin": self.ui.paintmargin_entry,
            "paintmethod": self.ui.paintmethod_combo,
            "multidepth": self.ui.mpass_cb,
            "depthperpass": self.ui.maxdepth_entry
        })

        self.ui.plot_cb.stateChanged.connect(self.on_plot_cb_click)
        self.ui.generate_cnc_button.clicked.connect(self.on_generatecnc_button_click)
        self.ui.generate_paint_button.clicked.connect(self.on_paint_button_click)

    def on_paint_button_click(self, *args):
        self.app.report_usage("geometry_on_paint_button")

        self.app.info("Click inside the desired polygon.")
        self.read_form()
        tooldia = self.options["painttooldia"]
        overlap = self.options["paintoverlap"]

        # Connection ID for the click event
        subscription = None

        # To be called after clicking on the plot.
        def doit(event):
            self.app.info("Painting polygon...")
            self.app.plotcanvas.mpl_disconnect(subscription)
            point = [event.xdata, event.ydata]
            self.paint_poly(point, tooldia, overlap)

        subscription = self.app.plotcanvas.mpl_connect('button_press_event', doit)

    def paint_poly(self, inside_pt, tooldia, overlap):

        # Which polygon.
        #poly = find_polygon(self.solid_geometry, inside_pt)
        poly = self.find_polygon(inside_pt)

        # No polygon?
        if poly is None:
            self.app.log.warning('No polygon found.')
            self.app.inform.emit('[warning] No polygon found.')
            return

        proc = self.app.proc_container.new("Painting polygon.")

        name = self.options["name"] + "_paint"

        # Initializes the new geometry object
        def gen_paintarea(geo_obj, app_obj):
            assert isinstance(geo_obj, FlatCAMGeometry), \
                "Initializer expected a FlatCAMGeometry, got %s" % type(geo_obj)
            #assert isinstance(app_obj, App)

            if self.options["paintmethod"] == "seed":
                cp = self.clear_polygon2(poly.buffer(-self.options["paintmargin"]),
                                         tooldia, overlap=overlap)

            else:
                cp = self.clear_polygon(poly.buffer(-self.options["paintmargin"]),
                                        tooldia, overlap=overlap)

            geo_obj.solid_geometry = list(cp.get_objects())
            geo_obj.options["cnctooldia"] = tooldia
            self.app.inform.emit("Done.")

        def job_thread(app_obj):
            try:
                app_obj.new_object("geometry", name, gen_paintarea)
            except Exception as e:
                proc.done()
                raise e
            proc.done()

        self.app.inform.emit("Polygon Paint started ...")

        # Promise object with the new name
        self.app.collection.promise(name)

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

    def on_generatecnc_button_click(self, *args):
        self.app.report_usage("geometry_on_generatecnc_button")
        self.read_form()
        self.generatecncjob()

    def generatecncjob(self,
                       z_cut=None,
                       z_move=None,
                       feedrate=None,
                       tooldia=None,
                       outname=None,
                       spindlespeed=None,
                       multidepth=None,
                       depthperpass=None,
                       use_thread=True):
        """
        Creates a CNCJob out of this Geometry object. The actual
        work is done by the target FlatCAMCNCjob object's
        `generate_from_geometry_2()` method.

        :param z_cut: Cut depth (negative)
        :param z_move: Hight of the tool when travelling (not cutting)
        :param feedrate: Feed rate while cutting
        :param tooldia: Tool diameter
        :param outname: Name of the new object
        :param spindlespeed: Spindle speed (RPM)
        :return: None
        """

        outname = outname if outname is not None else self.options["name"] + "_cnc"
        z_cut = z_cut if z_cut is not None else self.options["cutz"]
        z_move = z_move if z_move is not None else self.options["travelz"]
        feedrate = feedrate if feedrate is not None else self.options["feedrate"]
        tooldia = tooldia if tooldia is not None else self.options["cnctooldia"]
        multidepth = multidepth if multidepth is not None else self.options["multidepth"]
        depthperpass = depthperpass if depthperpass is not None else self.options["depthperpass"]

        # To allow default value to be "" (optional in gui) and translate to None
        # if not isinstance(spindlespeed, int):
        #     if isinstance(self.options["spindlespeed"], int) or \
        #             isinstance(self.options["spindlespeed"], float):
        #         spindlespeed = int(self.options["spindlespeed"])
        #     else:
        #         spindlespeed = None

        if spindlespeed is None:
            # int or None.
            spindlespeed = self.options['spindlespeed']

        # Object initialization function for app.new_object()
        # RUNNING ON SEPARATE THREAD!
        def job_init(job_obj, app_obj):
            assert isinstance(job_obj, FlatCAMCNCjob), \
                "Initializer expected a FlatCAMCNCjob, got %s" % type(job_obj)

            # Propagate options
            job_obj.options["tooldia"] = tooldia

            app_obj.progress.emit(20)
            job_obj.z_cut = z_cut
            job_obj.z_move = z_move
            job_obj.feedrate = feedrate
            job_obj.spindlespeed = spindlespeed
            app_obj.progress.emit(40)
            # TODO: The tolerance should not be hard coded. Just for testing.
            job_obj.generate_from_geometry_2(self,
                                             multidepth=multidepth,
                                             depthpercut=depthperpass,
                                             tolerance=0.0005)

            app_obj.progress.emit(50)
            job_obj.gcode_parse()

            app_obj.progress.emit(80)

        if use_thread:
            # To be run in separate thread
            def job_thread(app_obj):
                with self.app.proc_container.new("Generating CNC Job."):
                    app_obj.new_object("cncjob", outname, job_init)
                    app_obj.inform.emit("CNCjob created: %s" % outname)
                    app_obj.progress.emit(100)

            # Create a promise with the name
            self.app.collection.promise(outname)

            # Send to worker
            self.app.worker_task.emit({'fcn': job_thread, 'params': [self.app]})
        else:
            self.app.new_object("cncjob", outname, job_init)

    def on_plot_cb_click(self, *args):  # TODO: args not needed
        if self.muted_ui:
            return
        self.read_form_item('plot')
        self.plot()

    def scale(self, factor):
        """
        Scales all geometry by a given factor.

        :param factor: Factor by which to scale the object's geometry/
        :type factor: float
        :return: None
        :rtype: None
        """

        if type(self.solid_geometry) == list:
            self.solid_geometry = [affinity.scale(g, factor, factor, origin=(0, 0))
                                   for g in self.solid_geometry]
        else:
            self.solid_geometry = affinity.scale(self.solid_geometry, factor, factor,
                                                 origin=(0, 0))

    def offset(self, vect):
        """
        Offsets all geometry by a given vector/

        :param vect: (x, y) vector by which to offset the object's geometry.
        :type vect: tuple
        :return: None
        :rtype: None
        """

        dx, dy = vect

        def translate_recursion(geom):
            if type(geom) == list:
                geoms=list()
                for local_geom in geom:
                    geoms.append(translate_recursion(local_geom))
                return geoms
            else:
                return  affinity.translate(geom, xoff=dx, yoff=dy)

        self.solid_geometry=translate_recursion(self.solid_geometry)

    def convert_units(self, units):
        factor = Geometry.convert_units(self, units)

        self.options['cutz'] *= factor
        self.options['travelz'] *= factor
        self.options['feedrate'] *= factor
        self.options['cnctooldia'] *= factor
        self.options['painttooldia'] *= factor
        self.options['paintmargin'] *= factor

        return factor

    def plot_element(self, element):
        try:
            for sub_el in element:
                self.plot_element(sub_el)

        except TypeError:  # Element is not iterable...

            if type(element) == Polygon:
                x, y = element.exterior.coords.xy
                self.axes.plot(x, y, 'r-')
                for ints in element.interiors:
                    x, y = ints.coords.xy
                    self.axes.plot(x, y, 'r-')
                return

            if type(element) == LineString or type(element) == LinearRing:
                x, y = element.coords.xy
                self.axes.plot(x, y, 'r-')
                return

            FlatCAMApp.App.log.warning("Did not plot:" + str(type(element)))

    def plot(self):
        """
        Plots the object into its axes. If None, of if the axes
        are not part of the app's figure, it fetches new ones.

        :return: None
        """

        # Does all the required setup and returns False
        # if the 'ptint' option is set to False.
        if not FlatCAMObj.plot(self):
            return

        # Make sure solid_geometry is iterable.
        # TODO: This method should not modify the object !!!
        # try:
        #     _ = iter(self.solid_geometry)
        # except TypeError:
        #     if self.solid_geometry is None:
        #         self.solid_geometry = []
        #     else:
        #         self.solid_geometry = [self.solid_geometry]
        #
        # for geo in self.solid_geometry:
        #
        #     if type(geo) == Polygon:
        #         x, y = geo.exterior.coords.xy
        #         self.axes.plot(x, y, 'r-')
        #         for ints in geo.interiors:
        #             x, y = ints.coords.xy
        #             self.axes.plot(x, y, 'r-')
        #         continue
        #
        #     if type(geo) == LineString or type(geo) == LinearRing:
        #         x, y = geo.coords.xy
        #         self.axes.plot(x, y, 'r-')
        #         continue
        #
        #     if type(geo) == MultiPolygon:
        #         for poly in geo:
        #             x, y = poly.exterior.coords.xy
        #             self.axes.plot(x, y, 'r-')
        #             for ints in poly.interiors:
        #                 x, y = ints.coords.xy
        #                 self.axes.plot(x, y, 'r-')
        #         continue
        #
        #     FlatCAMApp.App.log.warning("Did not plot:", str(type(geo)))

        self.plot_element(self.solid_geometry)

        self.app.plotcanvas.auto_adjust_axes()