__init__.py 文件源码

def tick(self):
        """
        Pulls all keyboard events from the event queue and processes them according to our keyboard_registry/descriptions.
        Triggers events for all registered keys like: 'key_down.[desc]' (when  pressed) and 'key_up.[desc]' (when released),
        where desc is the lowercase string after `pygame.K_`... (e.g. 'down', 'up', etc..).
        """
        events = pygame.event.get([pygame.KEYDOWN, pygame.KEYUP])
        for e in events:
            # a key was pressed that we are interested in -> set to True or False
            if e.key in self.keyboard_registry:
                if e.type == pygame.KEYDOWN:
                    self.keyboard_registry[e.key] = True
                    self.trigger_event("key_down." + self.descriptions[e.key])
                else:
                    self.keyboard_registry[e.key] = False
                    self.trigger_event("key_up." + self.descriptions[e.key])