RubberBand.py 文件源码

def OnLeftDown(self, event, dc, scaling):
        """
        Called when left mouse is pressed on Viewer. Starts to edit a new
        rubberband bounding box
        @param event: Mouse event
        @param dc: Device Context of Viewer
        @param scaling: PLCOpen scaling applied on Viewer
        """
        # Save the point where mouse was pressed in Viewer unit, position may
        # be modified by scroll and zoom applied on viewer
        self.StartPoint = GetScaledEventPosition(event, dc, scaling)

        # Initialize rubberband bounding box
        self.CurrentBBox = wx.Rect(self.StartPoint.x, self.StartPoint.y, 0, 0)

        # Change viewer mouse cursor to reflect a rubberband bounding box is
        # edited
        self.DrawingSurface.SetCursor(wx.StockCursor(wx.CURSOR_CROSS))

        self.Redraw()