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Possible way to combine pygame and asyncio
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| import asyncio | |
| import threading | |
| import pygame | |
| USER_EV1 = pygame.event.custom_type() | |
| def pygame_loop(async_stopper): | |
| pygame.init() | |
| screen = pygame.display.set_mode((800, 600)) | |
| clock = pygame.time.Clock() | |
| while True: | |
| delta = clock.tick(60) / 1000 | |
| for event in pygame.event.get(): | |
| if event.type == pygame.QUIT: | |
| async_stopper() | |
| return | |
| if event.type == USER_EV1: | |
| print('Event data from async task:', event.dict) | |
| screen.fill((0, 0, 64)) | |
| pygame.display.flip() | |
| async def some_async_producer(): | |
| n = 0 | |
| while True: | |
| await asyncio.sleep(1) | |
| print('sleepy...') | |
| n += 1 | |
| if n % 5 == 0: | |
| pygame.event.post(pygame.event.Event(USER_EV1, {'foo': 'bar'})) | |
| async def main(): | |
| # setup pygame thread | |
| stop_event = asyncio.Event() | |
| loop = asyncio.get_running_loop() | |
| def _async_stopper(): | |
| loop.call_soon_threadsafe(stop_event.set) | |
| t = threading.Thread(target=pygame_loop, args=(_async_stopper,)) | |
| t.start() | |
| # start some background tasks. | |
| # Could be done any other way, but just putting the "workers" into | |
| # background makes the next steps easier | |
| bg_tasks = [ | |
| asyncio.create_task(some_async_producer()), | |
| ] | |
| # wait for pygame thread to stop | |
| await stop_event.wait() | |
| # cancel all tasks. | |
| for task in bg_tasks: | |
| task.cancel() | |
| # await the cancelled tasks. No TimeoutError raised | |
| # pending will contain remaining tasks, that failed to stop after timeout. | |
| done, pending = await asyncio.wait(bg_tasks, timeout=5) | |
| if len(pending) > 0: | |
| for task in pending: | |
| print(task, ' failed to cancel!') | |
| loop.stop() # last resort, could probably just do sys.exit() as well | |
| if __name__ == '__main__': | |
| asyncio.run(main()) |
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