-// virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
-// virtual void editorDestroyed(QObject *editor);
-// virtual void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
-// virtual void rowsInserted(const QModelIndex &parent, int start, int end);
-// virtual void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);