#include <QtGui/qdirmodel.h>
#ifndef QDIRMODEL_H
#ifndef QT_NO_DIRMODEL
class QDirModel: public QAbstractItemModel{
   /* Some contents are skipped to improve readability */
   public: virtual void sort(int column, enum Qt::SortOrder order = Qt::AscendingOrder);
   /* ... */
};
#endif // QT_NO_DIRMODEL
#endif // QDIRMODEL_H