#include <QtGui/qabstractproxymodel.h> #ifndef QABSTRACTPROXYMODEL_H #ifndef QT_NO_PROXYMODEL class QAbstractProxyModel: public QAbstractItemModel{ /* Some contents are skipped to improve readability */ public: virtual ~QAbstractProxyModel(); /* ... */ }; #endif // QT_NO_PROXYMODEL #endif // QABSTRACTPROXYMODEL_H