snackbar.py 文件源码

def begin(self):
        if self.button_text == '':
            self.remove_widget(self.ids['_button'])
        else:
            self.ids['_spacer'].width = dp(16) if DEVICE_TYPE == "mobile" else dp(40)
            self.padding_right = dp(16)
        Window.add_widget(self)
        anim = Animation(y=0, duration=.3, t='out_quad')
        anim.start(self)
        Clock.schedule_once(lambda dt: self.die(), self.duration)