Kivy:检查功能是否已经安排好 [英] Kivy: Check if a function is already scheduled
问题描述
有没有一种方法可以检查功能是否已经安排好?我正在查看Clock
方法,但没有看到我可以使用的任何东西.我正在尝试避免对函数进行重新调度(Clock.unschedule(func)
-> Clock.schedule_interval(func, dt)
),除非已经开始对其进行调度.
Is there a way to check if a function has been scheduled already? I was looking at the Clock
methods but didn't see anything I could use. I am trying to avoid a rescheduling(Clock.unschedule(func)
-> Clock.schedule_interval(func, dt)
) of a function unless it is already scheduled to begin with.
推荐答案
您可以使用kivy.clock.Clock.get_events()
获取预定事件的列表:
You can use kivy.clock.Clock.get_events()
to get the list of scheduled events:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
Builder.load_string("""
#:import Clock kivy.clock.Clock
<MyWidget>:
Button:
text: "Print events"
on_press: print(Clock.get_events())
Button:
text: "Add event"
on_press: Clock.schedule_once(root.my_callback, 5)
""")
class MyWidget(BoxLayout):
def my_callback(self, arg):
print("my_callback")
class MyApp(App):
def build(self):
return MyWidget()
if __name__ == '__main__':
MyApp().run()
旧答案:
不是很干净的方法,但是您可以检查kivy.clock.Clock._events
列表的内容.
Not a very clean way, but you can examine the content of kivy.clock.Clock._events
list.
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