def METHOD_NAME(self, context, event):
    """
    Args:
      context:
      event:
    Returns:
    """
    wm = context.window_manager
    context.area.tag_redraw()
    if not self.running:
        from phobos.blender.phoboslog import log
        bpy.types.SpaceView3D.draw_handler_remove(self._handle2d, 'WINDOW')
        bpy.types.SpaceView3D.draw_handler_remove(self._handle3d, 'WINDOW')
        log("Stop drawing Phobos information.", 'DEBUG')
        return {'FINISHED'}
    if event.type == 'PAGE_UP' and event.value == 'PRESS':
        wm.phobos_msg_offset += 1
    if event.type == 'PAGE_DOWN' and event.value == 'PRESS':
        wm.phobos_msg_offset -= 1
    if event.shift and event.type == 'LEFTMOUSE' and event.value == 'CLICK':
        pass
    return {'PASS_THROUGH'}