def ResetSelection(self):
        """ Resets the mouse selection to entire canvas """
    
        self.m_stpoint = wxPoint(0,0)
        sz=self._canvas.GetSize()
        w,h=sz.GetWidth(), sz.GetHeight()
        self.m_endpoint = wxPoint(w,h)
 Resets the mouse selection to entire canvas 
recipes/Python/189744_wxPythGraphics__Drawing_rubberbands_over/recipe-189744.py