void grits_object_pick_begin(GritsObject *object, GritsOpenGL *opengl);
void grits_object_pick_pointer(GritsObject *object, double x, double y);
void grits_object_pick_end(GritsObject *object);
+void grits_object_event(GritsObject *object, GdkEvent *event);
/**
* grits_object_queue_draw: