void dropEvent( QDropEvent *);
void dragEnterEvent( QDragEnterEvent * );
void dragMoveEvent( QDragMoveEvent * );
void dragLeaveEvent( QDragLeaveEvent * );
void closeEvent( QCloseEvent *);
void dropEvent( QDropEvent *);
void dragEnterEvent( QDragEnterEvent * );
void dragMoveEvent( QDragMoveEvent * );
void dragLeaveEvent( QDragLeaveEvent * );
void closeEvent( QCloseEvent *);