matplotlib:如何拿起班次点击数字？

Question

我有一个matplotlib,我创建了button_press_event这样的:

self.fig.canvas.mpl_connect('button_press_event', self.onClick)

def onClick(self, event)
    if event.button == 1:
        # draw some artists on left click

    elif event.button == 2:
        # draw a vertical line on the mouse x location on wheel click

    elif event.button == 3:
        # clear artists on right click

现在可以将车轮点击处理程序修改为这样的东西

    elif event.button == 2 or (event.button == 1 and event.key == "shift"):
        # draw a vertical line on the mouse x location 
        # on wheel click or on shift+left click 
        # (alternative way if there is no wheel for example)

它似乎button_press_event不支持键,key_press_event不支持鼠标按钮点击,但我不确定.

有办法吗？

Answer 1

您还可以绑定按键和键释放事件,并执行以下操作:

self.fig.canvas.mpl_connect('key_press_event', self.on_key_press)
self.fig.canvas.mpl_connect('key_release_event', self.on_key_release)

...

def on_key_press(self, event):
   if event.key == 'shift':
       self.shift_is_held = True

def on_key_release(self, event):
   if event.key == 'shift':
       self.shift_is_held = False

然后你可以检查你的onClick功能是否self.shift_is_held.

if event.button == 3:
    if self.shift_is_held:
        do_something()
    else:
        do_something_else()