如何使用可中断的基维时钟?

How to use the intteruptible kivy clock?

我正在尝试在 kivy 中构建一个简单的秒表,我想使用 interruptible clock to properly create an interval that tracks 1/100th of a second (The normal clock isn't accurate enough it seems). But I can't really figure out how to properly integrate the interruptible clock

我试着阅读它并尝试了这个

class TimerApp(App):
    def build_config(self, config):
        config.setdefaults('section1', {
            'KIVY_CLOCK': 'interrupt'
        })

    def build(self):
        config = self.config
        return AppLayout()

然而,这似乎根本没有改变 Clock.schedule_interval 功能。解决此问题的正确方法是什么?我如何验证设置是否已更改?

以下示例尝试描述差异:

注意:我将此测试的超时设置为 1 秒(1000 毫秒)

使用默认设置:

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.boxlayout import BoxLayout
import time

t = int(round(time.time() * 1000)) #current time in millisecond


def call_back(dt):
    global t
    t1 = int(round(time.time() * 1000))
    print t1 - t
    t = t1

clock = Clock.schedule_interval(call_back, 1)


class TimerApp(App):

    def build(self):
        return BoxLayout()

if __name__ == '__main__':
    TimerApp().run()

输出是:

1002
1003
1006
1004
1006
1005
1004
1001
1003
1002
1003

如您所见,输出总是(几乎)> 1000 毫秒

使用中断配置:

...
from kivy.config import Config

...
class TimerApp(App):

    def build(self):
        Config.set('graphics', 'KIVY_CLOCK', 'interrupt')
        Config.write()
        return BoxLayout()
...

输出为:

997
998
1000
1000
998
998
1000
1001
1000