__init__.py 文件源码

def _on_mouse_wheel_moved(self, next_handler, ev, data):

        x, y = self._get_mouse_position(ev)
        y = self.height - y

        axis = EventMouseWheelAxis()
        carbon.GetEventParameter(ev, kEventParamMouseWheelAxis,
            typeMouseWheelAxis, c_void_p(), sizeof(axis), c_void_p(),
            byref(axis))
        delta = c_long()
        carbon.GetEventParameter(ev, kEventParamMouseWheelDelta,
            typeSInt32, c_void_p(), sizeof(delta), c_void_p(),
            byref(delta))
        if axis.value == kEventMouseWheelAxisX:
            self.dispatch_event('on_mouse_scroll', 
                x, y, delta.value, 0)
        else:
            self.dispatch_event('on_mouse_scroll', 
                x, y, 0, delta.value)

        # _Don't_ call the next handler, which is application, as this then
        # calls our window handler again.
        #carbon.CallNextEventHandler(next_handler, ev)
        return noErr