Stopwatch Example - Kivy Typing CST Test

Stopwatch Example — Kivy Code

A simple stopwatch that starts, stops, and resets using Clock scheduling.

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label

class StopwatchApp(App):
	def build(self):
		self.time = 0
		self.running = False
		self.layout = BoxLayout(orientation='vertical', padding=20)
		self.label = Label(text='0.0', font_size=32)
		self.layout.add_widget(self.label)
		self.layout.add_widget(Button(text='Start', on_press=lambda x: self.start()))
		self.layout.add_widget(Button(text='Stop', on_press=lambda x: self.stop()))
		self.layout.add_widget(Button(text='Reset', on_press=lambda x: self.reset()))
		return self.layout

	def update(self, dt):
		self.time += dt
		self.label.text = f'{self.time:.1f}'

	def start(self):
		if not self.running:
		self.running = True
		Clock.schedule_interval(self.update, 0.1)

	def stop(self):
		self.running = False
		Clock.unschedule(self.update)

	def reset(self):
		self.time = 0
		self.label.text = '0.0'

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

Kivy Language Guide

Kivy is an open-source Python framework for building cross-platform multitouch applications on Android, iOS, Windows, macOS, Linux, and Raspberry Pi. It provides a UI toolkit, gesture support, animations, layouts, and a declarative KV language for rapid app development.

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