MapBoard.py 文件源码

def show_orientation_arrow(self):
        # Create an arrow if it doesn't exist
        if type(self.mapviewer.arrow) != 'Widget':
            self.mapviewer.set_orientation_arrow(OrientationArrow())
        if self.mapviewer.arrow not in self.children:
            self.add_widget(self.mapviewer.arrow)

        # Set the position to the former position
        self.mapviewer.set_arrow_pos()