#include <QtGui/qevent.h>
#ifndef QEVENT_H
#ifndef QT_NO_DRAGANDDROP
class QDropEvent: public QEvent, public QMimeSource{
   /* Some contents are skipped to improve readability */
   public: void setDropAction(enum Qt::DropAction action);
   /* ... */
};
#endif // QT_NO_DRAGANDDROP
#endif // QEVENT_H