virtual void SetRange(int minValue, int maxValue) = 0;
virtual int GetMin() const = 0;
virtual int GetMax() const = 0;
+ void SetMin( int minValue ) { SetRange( minValue , GetMax() ) ; }
+ void SetMax( int maxValue ) { SetRange( GetMin() , maxValue ) ; }
// the line/page size is the increment by which the slider moves when
// cursor arrow key/page up or down are pressed (clicking the mouse is like