26    explicit QwtArrowButton ( 
int num, Qt::ArrowType, QWidget* parent = NULL );
 
   29    Qt::ArrowType arrowType() 
const;
 
   32    virtual QSize sizeHint() 
const QWT_OVERRIDE;
 
   33    virtual QSize minimumSizeHint() 
const QWT_OVERRIDE;
 
   36    virtual void paintEvent( QPaintEvent*) QWT_OVERRIDE;
 
   37    virtual void keyPressEvent( QKeyEvent* ) QWT_OVERRIDE;
 
   39    virtual void drawButtonLabel( QPainter* );
 
   40    virtual void drawArrow( QPainter*,
 
   41        const QRect&, Qt::ArrowType ) 
const;
 
   42    virtual QRect labelRect() 
const;
 
   43    virtual QSize arrowSize( Qt::ArrowType,
 
   44        const QSize& boundingSize ) 
const;