virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent);
QVariant data(const QModelIndex &index, int role) const;
virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent);
QVariant data(const QModelIndex &index, int role) const;