plot.py 文件源码

def _drawRubberBand(self, corner1, corner2):
        """Draws/erases rect box from corner1 to corner2"""
        ptx, pty, rectWidth, rectHeight = self._point2ClientCoord(
            corner1, corner2)
        # draw rectangle
        dc = wx.ClientDC(self.canvas)
        dc.SetPen(wx.Pen(wx.BLACK))
        dc.SetBrush(wx.Brush(wx.WHITE, wx.BRUSHSTYLE_TRANSPARENT))
        dc.SetLogicalFunction(wx.INVERT)
        dc.DrawRectangle(ptx, pty, rectWidth, rectHeight)
        dc.SetLogicalFunction(wx.COPY)