+ virtual wxWindow *GetTargetWindow() const;
+
+ // Set the scrolled area of the window.
+ virtual void DoSetVirtualSize( int x, int y );
+
+ // wxWindow's GetBestVirtualSize returns the actual window size,
+ // whereas we want to return the virtual size
+ virtual wxSize GetBestVirtualSize() const;
+
+ // Return the size best suited for the current window
+ // (this isn't a virtual size, this is a sensible size for the window)
+ virtual wxSize DoGetBestSize() const;
+
+ // Set the x, y scrolling increments.
+ void SetScrollRate( int xstep, int ystep );