box2d_viewer.py 文件源码

def checkEvents(self):
        """
        Check for pygame events (mainly keyboard/mouse events).
        Passes the events onto the GUI also.
        """
        for event in pygame.event.get():
            if event.type == QUIT or (event.type == KEYDOWN and event.key ==
                                      pygame.K_ESCAPE):
                return False
            elif event.type == KEYDOWN:
                self._Keyboard_Event(event.key, down=True)
            elif event.type == KEYUP:
                self._Keyboard_Event(event.key, down=False)
            elif event.type == MOUSEBUTTONDOWN:
                if event.button == 4:
                    self.viewZoom *= 1.1
                elif event.button == 5:
                    self.viewZoom /= 1.1
            elif event.type == MOUSEMOTION:
                if self.rMouseDown:
                    self.viewCenter -= (event.rel[0] /
                                        5.0, -event.rel[1] / 5.0)

        return True