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