__init__.py 文件源码

def _create_track_region(self):
        self._remove_track_region()

        # Create a tracking region for the content part of the window
        # to receive enter/leave events.
        track_id = MouseTrackingRegionID()
        track_id.signature = DEFAULT_CREATOR_CODE
        track_id.id = 1
        self._track_ref = MouseTrackingRef()
        self._track_region = carbon.NewRgn()
        if self._fullscreen:
            carbon.SetRectRgn(self._track_region, 
                self._view_x, self._view_y, 
                self._view_x + self._width, self._view_y + self._height)
            options = kMouseTrackingOptionsGlobalClip
        else:
            carbon.GetWindowRegion(self._window, 
                kWindowContentRgn, self._track_region)
            options = kMouseTrackingOptionsGlobalClip
        carbon.CreateMouseTrackingRegion(self._window,  
            self._track_region, None, options,
            track_id, None, None,
            byref(self._track_ref))