+ void create_line(boost::shared_ptr<ARDOUR::AutomationList> list);
+ bool set_position(nframes_t pos, void* src, double* ignored);
+ void region_resized(ARDOUR::Change what_changed);
+ bool canvas_event(GdkEvent* ev);
+ void add_automation_event (GdkEvent* event, nframes_t when, double y);