CODEWITHSUNDEEP
pythonkivy
Jasper Dahilan
Jasper Dahilan

Reputation: 11

Stopwatch- stop and start Python

I am working on a simple stopwatch. The problem is that the stopwatch automatically runs the moment you run the program and even if you press the stop button unable to make it stop.

class ClockApp(App):
    sw_started = False
    sw_seconds = 0

    def update_clock(self, nap):
        if self.sw_started:
            self.sw_seconds += nap

    def update_time(self, nap):
        self.root.ids.time.text = strftime('[b]%H[/b]:%M:%S')
        self.sw_seconds += nap
        minutes, seconds = divmod(self.sw_seconds, 60)
        self.root.ids.stopwatch.text = ('%02d:%02d.[size=40]%02d[/size]' % (int(minutes), int(seconds),
                                                                            int(seconds * 100 % 100)))

    def start_stop(self):
        self.root.ids.start_stop.text = ('Start'
                                         if self.sw_started else 'Stop')
        self.sw_started = not self.sw_started

    def reset(self):
        if self.sw_started:
            self.root.ids.start_stop.text = 'Start'
        self.sw_started = False
        self.sw_seconds = 0

    def on_start(self):
        Clock.schedule_interval(self.update_time, 0)


class ClockLayout(BoxLayout):
    time_prop = ObjectProperty(None)


if __name__ == '__main__':
    LabelBase.register(name='Roboto', fn_regular='Roboto-Thin.ttf', fn_bold='Roboto-Medium.ttf')

Window.clearcolor = get_color_from_hex('#101216')

ClockApp().run()

Upvotes: 0

Views: 129

Answers (1)

Seb
Seb

Reputation: 4586

Your time counting is duplicated in two different methods:

    def update_clock(self, nap):
        if self.sw_started:
            self.sw_seconds += nap # here

    def update_time(self, nap):
        self.root.ids.time.text = strftime('[b]%H[/b]:%M:%S')
        self.sw_seconds += nap # and here
        # [...]

update_clock only counts up if sw_started is True, but update_time has no such check. The method you've scheduled with schedule_interval is update_time, so the value of sw_started has no effect.

Either schedule update_clock instead:

    def on_start(self):
        Clock.schedule_interval(self.update_clock, 0)

...or add a conditional to update_time:

    def update_time(self, nap):
        if self.sw_started:
            self.root.ids.time.text = strftime('[b]%H[/b]:%M:%S')
            self.sw_seconds += nap
            minutes, seconds = divmod(self.sw_seconds, 60)
            # [...]

Upvotes: 1

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