void resizeClip(const QPointF &startPos, const QPointF &endPos, bool resizeClipStart);
void addClip(QDomElement xml, int clipId, int track, GenTime startpos, const QRectF &rect, GenTime duration);
void deleteClip(int track, GenTime startpos, const QRectF &rect);
void resizeClip(const QPointF &startPos, const QPointF &endPos, bool resizeClipStart);
void addClip(QDomElement xml, int clipId, int track, GenTime startpos, const QRectF &rect, GenTime duration);
void deleteClip(int track, GenTime startpos, const QRectF &rect);