Python wx.GCDC Examples

def PrintPage(self, dc, pageNumber):
        """
        Print the given page on the given device context.
        """
        #try:
        #    pdc = wx.GCDC(dc)
        #except:
        #    pdc = dc
        pdc = dc

        # If the request page isn't next in order, we have to restart
        # the printing process and advance until we reach the desired page
        if pageNumber != self.currentPage + 1:
            print "Skipping pages..."
            self.StartPrinting()
            for i in range(1, pageNumber):
                self.PrintOnePage(pdc, i)
            dc.Clear()
            print "...finished skipping."

        return self.PrintOnePage(pdc, pageNumber) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wx.Colour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            dc.DrawRectangle(rect) 

def _draw_rings_layer(self, dc, data, map_rel):
        """Draw a points layer.

        dc       the device context to draw on
        data     an iterable of point tuples:
                 (x, y, place, radius, colour, x_off, y_off, pdata)
        map_rel  points relative to map if True, MUST BE TRUE for lightweight
        Assumes all points are the same colour, saving 100's of ms.
        """

        assert map_rel is True
        if len(data) == 0:
            return
        (lon, lat, place, radius, colour, x_off, y_off, pdata) = data[0]

        scale = 2 ** self._pyslip.tiles.zoom_level

        # Draw points on map/view, using transparency if implemented.
        try:
            dc = wx.GCDC(dc)
        except NotImplementedError:
            pass
        dc.SetPen(wx.Pen(colour))
        dc.SetBrush(wx.Brush(colour, wx.TRANSPARENT))
        for (lon, lat, place, radius, colour, x_off, y_off, pdata) in data:
            (x, y) = self._pyslip.ConvertGeo2View((lon, lat))
            dc.DrawCircle(x, y, radius * scale) 

def DrawPointLayer(self, dc, data, map_rel):
        """Draw a points layer.

        dc       the device context to draw on
        data     an iterable of point tuples:
                     (x, y, place, radius, colour, x_off, y_off, pdata)
        map_rel  points relative to map if True, else relative to view
        """

        # draw points on map/view
        if map_rel:
            dc = wx.GCDC(dc)  # allow transparent colours
            for (lon, lat, place, radius, colour, x_off, y_off, pdata) in data:
                pt = self.ConvertGeo2ViewMasked((lon, lat))
                if pt:
                    dc.SetPen(wx.Pen(colour))
                    dc.SetBrush(wx.Brush(colour))
                    (x, y) = pt
                    if radius:
                        dc.DrawCircle(x + x_off, y + y_off, radius)
        else:
            (dc_w, dc_h) = dc.GetSize()
            dc_w2 = dc_w / 2  # noqa; lgtm; self-modifying code
            dc_h2 = dc_h / 2  # noqa; lgtm; self-modifying code
            dc_h -= 1
            dc_w -= 1
            dc = wx.GCDC(dc)  # allow transparent colours
            for (x, y, place, radius, colour, x_off, y_off, pdata) in data:
                dc.SetPen(wx.Pen(colour))
                dc.SetBrush(wx.Brush(colour))
                exec(self.point_view_placement[place])
                if radius:
                    dc.DrawCircle(x, y, radius) 

def LightweightDrawPointLayer(self, dc, data, map_rel):
        """Draw a points layer.

        dc       the device context to draw on
        data     an iterable of point tuples:
                     (x, y, place, radius, colour, x_off, y_off, pdata)
        map_rel  points relative to map if True, MUST BE TRUE for lightweight
        Assumes all points are the same colour, saving 100's of ms.
        """
        assert map_rel is True
        if len(data) == 0:
            return
        (lon, lat, place, radius, colour, x_off, y_off, pdata) = data[0]

        # draw points on map/view
        if map_rel:
            # GCDC device context permits antialiasing and transparent colors.
            # But, signficant time savings by not allowing these features
            # It's not clear that we actually want or use them anyway
            # dc = wx.GCDC(dc)            # allow transparent colours
            dc.SetPen(wx.Pen(colour))
            dc.SetBrush(wx.Brush(colour))
            for (lon, lat, place, radius, colour, x_off, y_off, pdata) in data:
                pt = self.ConvertGeo2ViewMasked((lon, lat))
                if pt:
                    (x, y) = pt
                    if radius:
                        dc.DrawCircle(x + x_off, y + y_off, radius) 

def _draw_ring_layer(self, dc, data, map_rel):
        """Draw a points layer.

        dc       the device context to draw on
        data     an iterable of point tuples:
                 (x, y, place, radius, colour, x_off, y_off, pdata)
        map_rel  points relative to map if True, MUST BE TRUE for lightweight
        Assumes all points are the same colour, saving 100's of ms.
        """

        assert map_rel is True
        if len(data) == 0:
            return
        (lon, lat, place, radius, colour, x_off, y_off, pdata) = data[0]

        scale = 2 ** self._pyslip.tiles.zoom_level

        # Draw points on map/view, using transparency if implemented.
        try:
            dc = wx.GCDC(dc)
        except NotImplementedError:
            pass
        dc.SetPen(wx.Pen(colour))
        dc.SetBrush(wx.Brush(colour, wx.TRANSPARENT))
        for (lon, lat, place, radius, colour, x_off, y_off, pdata) in data:
            (x, y) = self._pyslip.ConvertGeo2View((lon, lat))
            dc.DrawCircle(x, y, radius * scale) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wxc.NamedColour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            if wxc.is_phoenix:
                dc.DrawRectangle(rect)
            else:
                dc.DrawRectangleRect(rect) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wx.Colour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            dc.DrawRectangle(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1<y0: y0, y1 = y1, y0
        if x1<y0: x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF' # or load from config?

        # Set a pen for the border
        color = wx.NamedColour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b = color.Get()
        color.Set(r,g,b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangleRect(rect) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wx.Colour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            dc.DrawRectangle(rect) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wx.Colour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            dc.DrawRectangle(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1<y0: y0, y1 = y1, y0
        if x1<y0: x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF' # or load from config?

        # Set a pen for the border
        color = wx.NamedColour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b = color.Get()
        color.Set(r,g,b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangleRect(rect) 

def draw_rubberband(self, x0, y0, x1, y1):
            # Use an Overlay to draw a rubberband-like bounding box.
            if self.wxoverlay is None:
                self.wxoverlay = wx.Overlay()
            dc = wx.ClientDC(self.canvas)
            odc = wx.DCOverlay(self.wxoverlay, dc)
            odc.Clear()

            dc = wx.GCDC(dc)

            height = self.canvas.figure.bbox.height
            y1 = height - y1
            y0 = height - y0

            if y1 < y0:
                y0, y1 = y1, y0
            if x1 < x0:
                x0, x1 = x1, x0

            w = x1 - x0
            h = y1 - y0
            rect = wx.Rect(x0, y0, w, h)

            rubberBandColor = '#C0C0FF'  # or load from config?

            # Set a pen for the border
            color = wx.Colour(rubberBandColor)
            dc.SetPen(wx.Pen(color, 1))

            # use the same color, plus alpha for the brush
            r, g, b, a = color.Get(True)
            color.Set(r, g, b, 0x60)
            dc.SetBrush(wx.Brush(color))
            dc.DrawRectangle(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wx.Colour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangle(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wx.Colour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangle(rect) 

def __on_paint(self, _event):
        pdc = wx.BufferedPaintDC(self)
        try:
            dc = wx.GCDC(pdc)
        except:
            dc = pdc

        w, h = self.GetClientSize()

        font = self.GetFont()
        font.SetPixelSize((0, h - (TICK_SIZE_MAJ * 2)))
        dc.SetFont(font)

        dc.SetPen(wx.Pen(wx.WHITE))
        dc.SetBrush(wx.Brush(wx.WHITE))
        dc.DrawRectangle(0, 0, w, h)

        colour = '#4DDB4D' if self._value >= self._threshold else '#FF4D4D'
        dc.SetPen(wx.Pen(colour))
        dc.SetBrush(wx.Brush(colour))
        x = self.__scale_x(self._value, w)
        dc.DrawRectangle(0, 0, x, h)

        colour = wx.Colour(0x80, 0x80, 0xFF, 128)
        dc.SetPen(wx.Pen(colour, 2))
        dc.SetBrush(wx.Brush(colour))
        x = round(self.__scale_x(self._threshold, w))
        dc.DrawPolygon([(x - THRES_SIZE, 0),
                        (x + THRES_SIZE, 0),
                        (x, THRES_SIZE)])
        dc.DrawPolygon([(x - THRES_SIZE, h),
                        (x + THRES_SIZE, h),
                        (x, h - THRES_SIZE)])
        dc.DrawLine(x, THRES_SIZE, x, h - THRES_SIZE)

        if self._noise is not None:
            dc.SetPen(wx.Pen('#8080FF', 1))
            x = self.__scale_x(self._noise, w)
            dc.DrawRectangle(0, TICK_SIZE_MAJ * 3 / 2.,
                             x, h - (TICK_SIZE_MAJ * 3))

        colour = wx.Colour(0x4d, 0x4d, 0x4d)
        dc.SetPen(wx.Pen(colour))
        dc.SetTextForeground(colour)
        ticks = range(LEVEL_MIN, LEVEL_MAX, 10)
        for tick in ticks:
            if tick not in [LEVEL_MIN, LEVEL_MAX]:
                x = self.__scale_x(tick, w)
                dc.DrawLine(x, 0, x, TICK_SIZE_MAJ)
                dc.DrawLine(x, h, x, h - TICK_SIZE_MAJ)

                label = str(tick)
                tW, tH = dc.GetTextExtent(label)
                dc.DrawText(label, x - tW / 2, (h - tH) / 2)
        ticks = range(LEVEL_MIN, LEVEL_MAX, 1)
        for tick in ticks:
            if tick not in [LEVEL_MIN, LEVEL_MAX]:
                x = self.__scale_x(tick, w)
                dc.DrawLine(x, 0, x, TICK_SIZE_MIN)
                dc.DrawLine(x, h, x, h - TICK_SIZE_MIN) 

def OnPaint(self, event):
        dc = wx.BufferedPaintDC(self)
        dc.Clear()
        dc.BeginDrawing()

        gc = wx.GCDC(dc)

        width, height = self.GetClientSize()

        gc.SetPen(wx.Pen(wx.NamedColour("GREY"), 3))
        gc.SetBrush(wx.GREY_BRUSH)

        gc.DrawLines(ArrowPoints(wx.TOP, width * 0.75, width * 0.5, 2, (width + height) // 4 - 3))
        gc.DrawLines(ArrowPoints(wx.TOP, width * 0.75, width * 0.5, 2, (width + height) // 4 + 3))

        gc.DrawLines(ArrowPoints(wx.BOTTOM, width * 0.75, width * 0.5, 2, (height * 3 - width) // 4 + 3))
        gc.DrawLines(ArrowPoints(wx.BOTTOM, width * 0.75, width * 0.5, 2, (height * 3 - width) // 4 - 3))

        thumb_rect = self.GetThumbRect()
        exclusion_rect = wx.Rect(thumb_rect.x, thumb_rect.y,
                                 thumb_rect.width, thumb_rect.height)
        if self.Parent.IsMessagePanelTop():
            exclusion_rect.y, exclusion_rect.height = width, exclusion_rect.y + exclusion_rect.height - width
        if self.Parent.IsMessagePanelBottom():
            exclusion_rect.height = height - width - exclusion_rect.y
        if exclusion_rect != thumb_rect:
            colour = wx.NamedColour("LIGHT GREY")
            gc.SetPen(wx.Pen(colour))
            gc.SetBrush(wx.Brush(colour))

            gc.DrawRectangle(exclusion_rect.x, exclusion_rect.y,
                             exclusion_rect.width, exclusion_rect.height)

        gc.SetPen(wx.GREY_PEN)
        gc.SetBrush(wx.GREY_BRUSH)

        gc.DrawPolygon(ArrowPoints(wx.TOP, width, width, 0, 0))

        gc.DrawPolygon(ArrowPoints(wx.BOTTOM, width, width, 0, height))

        gc.DrawRectangle(thumb_rect.x, thumb_rect.y,
                         thumb_rect.width, thumb_rect.height)

        dc.EndDrawing()
        event.Skip() 

def draw(self, drawDC=None):
        """
        Render the figure.
        """
        # Render figure using agg
        FigureCanvasAgg.draw(self)

        # Get bitmap of figure rendered
        self.bitmap = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
        if wx.VERSION < (3, 0, 0):
            self.bitmap.UseAlpha()

        # Create DC for rendering graphics in bitmap
        destDC = wx.MemoryDC()
        destDC.SelectObject(self.bitmap)

        # Get Graphics Context for DC, for anti-aliased and transparent
        # rendering
        destGC = wx.GCDC(destDC)

        destGC.BeginDrawing()

        # Get canvas size and figure bounding box in canvas
        width, height = self.GetSize()
        bbox = self.GetAxesBoundingBox()

        # If highlight to display is resize, draw thick grey line at bottom
        # side of canvas
        if self.Highlight == HIGHLIGHT_RESIZE:
            destGC.SetPen(HIGHLIGHT['RESIZE_PEN'])
            destGC.SetBrush(HIGHLIGHT['RESIZE_BRUSH'])
            destGC.DrawRectangle(0, height - 5, width, 5)

        # If highlight to display is merging graph, draw 50% transparent blue
        # rectangle on left or right part of figure depending on highlight type
        elif self.Highlight in [HIGHLIGHT_LEFT, HIGHLIGHT_RIGHT]:
            destGC.SetPen(HIGHLIGHT['DROP_PEN'])
            destGC.SetBrush(HIGHLIGHT['DROP_BRUSH'])

            x_offset = (bbox.width // 2
                        if self.Highlight == HIGHLIGHT_RIGHT
                        else 0)
            destGC.DrawRectangle(bbox.x + x_offset, bbox.y,
                                 bbox.width // 2, bbox.height)

        # Draw other Viewer common elements
        self.DrawCommonElements(destGC, self.GetButtons())

        destGC.EndDrawing()

        self._isDrawn = True
        self.gui_repaint(drawDC=drawDC) 

def DrawViewer(self):
        """
        Redraw content displayed by Viewer
        """
        # Create buffered DC for drawing in panel
        width, height = self.GetSize()
        bitmap = wx.EmptyBitmap(width, height)
        dc = wx.BufferedDC(wx.ClientDC(self), bitmap)
        dc.Clear()

        # Get Graphics Context for DC, for anti-aliased and transparent
        # rendering
        gc = wx.GCDC(dc)

        gc.BeginDrawing()

        # Get first item
        item = self.ItemsDict.values()[0]

        # Get item variable path masked according Debug Variable Panel mask
        item_path = item.GetVariable(
            self.ParentWindow.GetVariableNameMask())

        # Draw item variable path at Viewer left side
        w, h = gc.GetTextExtent(item_path)
        gc.DrawText(item_path, 20, (height - h) // 2)

        # Update 'Release' button state and text color according to item forced
        # flag value
        item_forced = item.IsForced()
        self.Buttons[1].Enable(item_forced)
        self.RefreshButtonsPosition()
        if item_forced:
            gc.SetTextForeground(wx.BLUE)

        # Draw item current value at right side of Viewer
        item_value = item.GetValue()
        w, h = gc.GetTextExtent(item_value)
        gc.DrawText(item_value, width - 40 - w, (height - h) // 2)

        # Draw other Viewer common elements
        self.DrawCommonElements(gc)

        gc.EndDrawing() 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wx.Colour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangle(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wxc.NamedColour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        if wxc.is_phoenix:
            dc.DrawRectangle(rect)
        else:
            dc.DrawRectangleRect(rect) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wx.Colour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangle(rect) 

def LightweightDrawPointLayer2(self, dc, data, map_rel):
        """Draw a points layer.

        dc       the device context to draw on
        data     an iterable of point tuples:
                     (x, y, place, radius, colour, x_off, y_off, pdata)
        map_rel  points relative to map if True, MUST BE TRUE for lightweight
        Assumes all points are the same colour, saving 100's of ms.

        In contrast to LightweightDrawPointLayer, this function draws
        rectangles or points (rather than circles) for performance reasons.
        """
        assert map_rel is True
        if len(data) == 0:
            return
        (lon, lat, place, radius, colour, x_off, y_off, pdata) = data[0]

        # draw points on map/view
        if map_rel:
            # GCDC device context permits antialiasing and transparent colors.
            # But, signficant time savings by not allowing these features
            # It's not clear that we actually want or use them anyway
            # dc = wx.GCDC(dc)            # allow transparent colours
            dc.SetPen(wx.Pen(colour))
            dc.SetBrush(wx.Brush(colour))
            points = []
            rectangles = []
            if radius:
                diameter = 2 * radius
            for (lon, lat, place, radius, colour, x_off, y_off, pdata) in data:
                pt = self.ConvertGeo2ViewMasked((lon, lat))
                if pt:
                    (x, y) = pt
                    if radius:
                        rectangles.append(
                            (x + x_off - radius, y + y_off - radius, diameter, diameter)
                        )
                    else:
                        points.append((x + x_off, y + y_off))
            if len(points):
                dc.DrawPointList(points)
            if len(rectangles):
                dc.DrawRectangleList(rectangles) 

def draw_rubberband(self, event, x0, y0, x1, y1):
        if self.retinaFix:  # On Macs, use the following code
            # wx.DCOverlay does not work properly on Retina displays.
            rubberBandColor = '#C0C0FF'
            if self.prevZoomRect:
                self.prevZoomRect.pop(0).remove()
            self.canvas.restore_region(self.savedRetinaImage)
            X0, X1 = self.zoomStartX, event.xdata
            Y0, Y1 = self.zoomStartY, event.ydata
            lineX = (X0, X0, X1, X1, X0)
            lineY = (Y0, Y1, Y1, Y0, Y0)
            self.prevZoomRect = self.zoomAxes.plot(
                lineX, lineY, '-', color=rubberBandColor)
            self.zoomAxes.draw_artist(self.prevZoomRect[0])
            self.canvas.blit(self.zoomAxes.bbox)
            return

        # Use an Overlay to draw a rubberband-like bounding box.

        dc = wx.ClientDC(self.canvas)
        odc = wx.DCOverlay(self.wxoverlay, dc)
        odc.Clear()

        # Mac's DC is already the same as a GCDC, and it causes
        # problems with the overlay if we try to use an actual
        # wx.GCDC so don't try it.
        if 'wxMac' not in wx.PlatformInfo:
            dc = wx.GCDC(dc)

        height = self.canvas.figure.bbox.height
        y1 = height - y1
        y0 = height - y0

        if y1 < y0:
            y0, y1 = y1, y0
        if x1 < x0:
            x0, x1 = x1, x0

        w = x1 - x0
        h = y1 - y0
        rect = wx.Rect(x0, y0, w, h)

        rubberBandColor = '#C0C0FF'  # or load from config?

        # Set a pen for the border
        color = wx.Colour(rubberBandColor)
        dc.SetPen(wx.Pen(color, 1))

        # use the same color, plus alpha for the brush
        r, g, b, a = color.Get(True)
        color.Set(r, g, b, 0x60)
        dc.SetBrush(wx.Brush(color))
        dc.DrawRectangle(rect)