void slotItemContextMenuRequested(int index, const QPointF& pos);
void slotViewContextMenuRequested(const QPointF& pos);
void slotHeaderContextMenuRequested(const QPointF& pos);
+ void slotHeaderColumnWidthChanged(const QByteArray& role, qreal current, qreal previous);
void slotItemHovered(int index);
void slotItemUnhovered(int index);
void slotItemDropEvent(int index, QGraphicsSceneDragDropEvent* event);