docs: def on_mouse_press(x, y, button, modifiers):
      """ 按下鼠标时 
  
      """ 
      if button == MouseKeyCode.LEFT:
          mouse.press()
      elif button == MouseKeyCode.RIGHT:
          mouse.right_press()
  
      # 判断是否有图形的点击事件被触发了
      shapes = list(all_shapes)
      while shapes:
          shape = shapes.pop()
          if(shape._press and shape_clicked(shape)):
              shape._press()