Python pygame在音乐播放期间冻结

Question

Hello I am building a simple mp3 player. I have it now so it plays a sound fine when I enable the function, but the gui temporarily freezes while waiting for the sound file to finish. I would like to be able to hit stop, exit, etc while the file plays. Any advice?

def Play():
    soundfile = 'test.wav'
    pygame.mixer.music.load(soundfile)
    pygame.mixer.music.play(0)
    events = pygame.event.get()
    while pygame.mixer.music.get_busy():

        for event in events:

            if event.type == pygame.QUIT:
                sys.exit()

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.Q:
                    sys.exit()
            elif event.type == pygame.MOUSEMOTION:
                 print "mouse at (%d, %d)" % event.pos

Answer 1

When pygame.event.get() is not being called, the game window will freeze. Since you're calling pygame.event.get() outside of your while loop, the window event queue is only getting flushed once. The simple solution is to just replace the events variable with pygame.event.get() directly inline so that it gets called continuously while get_busy() returns true.

In general for these situations, a better solution would be a little refactoring where you have pygame.event.get() called once centrally in your program and instead of calling a function called Play() that handles managing your event queue, you instead have a function called handlePlayForOneFrame(list_of_relevant_events_this_frame).