virtual void dataChanged(const QHash<QByteArray, QVariant> ¤t, const QSet<QByteArray> &roles = QSet<QByteArray>());
virtual void visibleRolesChanged(const QList<QByteArray> ¤t, const QList<QByteArray> &previous);
virtual void columnWidthChanged(const QByteArray &role, qreal current, qreal previous);
virtual void dataChanged(const QHash<QByteArray, QVariant> ¤t, const QSet<QByteArray> &roles = QSet<QByteArray>());
virtual void visibleRolesChanged(const QList<QByteArray> ¤t, const QList<QByteArray> &previous);
virtual void columnWidthChanged(const QByteArray &role, qreal current, qreal previous);