- void undisplay_diskstream ();
- void redisplay_diskstream ();
- void playlist_layered (boost::weak_ptr<ARDOUR::Diskstream>);
- void playlist_switched (boost::weak_ptr<ARDOUR::Diskstream>);
-
- void add_crossfade (boost::weak_ptr<ARDOUR::Crossfade>);
- void remove_crossfade (boost::shared_ptr<ARDOUR::Region>);