60 lines
1.8 KiB
Python
60 lines
1.8 KiB
Python
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'''Example shows the recommended way of how to run Kivy with the Python built
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in asyncio event loop as just another async coroutine.
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'''
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import asyncio
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from kivy.app import async_runTouchApp
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from kivy.lang.builder import Builder
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kv = '''
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BoxLayout:
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orientation: 'vertical'
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Button:
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id: btn
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text: 'Press me'
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BoxLayout:
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Label:
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id: label
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text: 'Button is "{}"'.format(btn.state)
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'''
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async def run_app_happily(root, other_task):
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'''This method, which runs Kivy, is run by the asyncio loop as one of the
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coroutines.
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'''
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# we don't actually need to set asyncio as the lib because it is the
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# default, but it doesn't hurt to be explicit
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await async_runTouchApp(root, async_lib='asyncio') # run Kivy
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print('App done')
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# now cancel all the other tasks that may be running
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other_task.cancel()
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async def waste_time_freely():
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'''This method is also run by the asyncio loop and periodically prints
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something.
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'''
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try:
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while True:
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print('Sitting on the beach')
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await asyncio.sleep(2)
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except asyncio.CancelledError as e:
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print('Wasting time was canceled', e)
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finally:
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# when canceled, print that it finished
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print('Done wasting time')
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if __name__ == '__main__':
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def root_func():
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'''This will run both methods asynchronously and then block until they
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are finished
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'''
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root = Builder.load_string(kv) # root widget
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other_task = asyncio.ensure_future(waste_time_freely())
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return asyncio.gather(run_app_happily(root, other_task), other_task)
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loop = asyncio.get_event_loop()
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loop.run_until_complete(root_func())
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loop.close()
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