virtual bool show_measures () const = 0;
virtual void export_session() = 0;
virtual void export_selection() = 0;
+ virtual void register_actions() = 0;
virtual void add_toplevel_controls (Gtk::Container&) = 0;
virtual void set_zoom_focus (Editing::ZoomFocus) = 0;
virtual Editing::ZoomFocus get_zoom_focus () const = 0;