+public:
+ // implementation detail
+ void Increment( int delta );
+
+private:
+ virtual void DoSetSize(int x, int y, int width, int height,
+ int sizeFlags = wxSIZE_AUTO);
+ virtual void DoMoveWindow(int x, int y, int width, int height);
+ virtual wxSize DoGetBestSize() const;
+
+ wxArrowButton* m_up;
+ wxArrowButton* m_down;
+ int m_pos;