+ void slotInsertSpace();
+ void slotRemoveSpace();
+ void insertSpace(const GenTime &pos, int track, const GenTime duration, bool add);
+ ClipItem *getActiveClipUnderCursor(bool allowOutsideCursor = false) const;
+ void addTimelineTrack(int ix, TrackInfo trackinfo);
+ void deleteTimelineTrack(int ix, TrackInfo trackinfo);
+ void changeTimelineTrack(int ix, TrackInfo trackinfo);