extern bool (*GridStatus_getTextureLockEnabled)();
void GridStatus_onTextureLockEnabledChanged();
+SignalHandlerId XYWindowDestroyed_connect(const SignalHandler& handler);
+void XYWindowDestroyed_disconnect(SignalHandlerId id);
MouseEventHandlerId XYWindowMouseDown_connect(const MouseEventHandler& handler);
void XYWindowMouseDown_disconnect(MouseEventHandlerId id);