#include <state_rectangle.h>
References studio::EVENT_LAYER_SELECTION_CHANGED, studio::EVENT_REFRESH, studio::EVENT_REFRESH_DUCKS, studio::EVENT_REFRESH_TOOL_OPTIONS, studio::EVENT_STOP, studio::EVENT_WORKAREA_MOUSE_BUTTON_DOWN, studio::EVENT_WORKAREA_MOUSE_BUTTON_DRAG, and studio::EVENT_WORKAREA_MOUSE_BUTTON_UP.