Kivy scheduling example

gistfile1.txt

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.uix.progressbar import ProgressBar
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock

class MainMenu(BoxLayout):
    def __init__(self, **kwargs):
        super(MainMenu, self).__init__(**kwargs)
        self.orientation = 'vertical'
        
        btn = Button(text="Start")
        btn.bind(on_release=self.heavyFunc)
        self.add_widget(btn)
        
        self.pb = ProgressBar(max = 10000)

        Clock.schedule_interval(self.heavyFunc,1/60.)
        self.add_widget(self.pb)
    
    def heavyFunc(self, dt):
        self.pb.value += 1
        print self.pb.value
        if self.pb.value >= 10000:
            Clock.unschedule(self.heavyFunc)

class TestApp(App):
    def build(self):
        return MainMenu()

if __name__ == "__main__":
    TestApp().run()