virtual void rowsInserted(const QModelIndex & parent, int start, int end);
virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
virtual void wheelEvent(QWheelEvent *);
virtual void rowsInserted(const QModelIndex & parent, int start, int end);
virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
virtual void wheelEvent(QWheelEvent *);