//for scrubbing... (click is start, drag is scrub, and release is stop...)
virtual bool on_motion_notify_event(GdkEventMotion* event);
virtual bool on_button_press_event(GdkEventButton *event);
virtual bool on_button_release_event(GdkEventButton *event);
//for scrubbing... (click is start, drag is scrub, and release is stop...)
virtual bool on_motion_notify_event(GdkEventMotion* event);
virtual bool on_button_press_event(GdkEventButton *event);
virtual bool on_button_release_event(GdkEventButton *event);