1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
'''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()
|
