+ virtual MouseCursors const * cursors () const = 0;
+ virtual VerboseCursor * verbose_cursor () const = 0;
+
+ virtual void get_pointer_position (double &, double &) const = 0;
+
+ virtual ARDOUR::Location* find_location_from_marker (Marker *, bool &) const = 0;
+ virtual Marker* find_marker_from_location_id (PBD::ID const &, bool) const = 0;
+