gint breleased (GdkEventButton* ev, Gtk::SpinButton* but, void (AudioRegionEditor::*pmf)());
bool on_delete_event (GdkEventAny *);
gint breleased (GdkEventButton* ev, Gtk::SpinButton* but, void (AudioRegionEditor::*pmf)());
bool on_delete_event (GdkEventAny *);