make Scroll() itself virtual too as existing code might override it (but new code should override DoScroll() only); use the same access in the derived classes as in wxScrollHelperBase

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57538 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/scrolwin.h

@@ -22,6 +22,7 @@ public:
     // default ctor doesn't do anything
     wxScrollHelper(wxWindow *win) : wxScrollHelperBase(win) { }
 
+    // implement the base class methods
     virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
                                int noUnitsX, int noUnitsY,
                                int xPos = 0, int yPos = 0,
@@ -29,6 +30,11 @@ public:
     virtual void AdjustScrollbars();
 
 protected:
+    virtual void DoScroll(int x, int y);
+    virtual void DoShowScrollbars(wxScrollbarVisibility horz,
+                                  wxScrollbarVisibility vert);
+
+private:
     // this does (each) half of AdjustScrollbars() work
     void DoAdjustScrollbar(GtkRange* range,
                            int pixelsPerLine,
@@ -64,11 +70,6 @@ protected:
                         int pixelsPerLine,
                         int *posOld);
 
-    // implement the base class methods
-    virtual void DoScroll(int x, int y);
-    virtual void DoShowScrollbars(wxScrollbarVisibility horz,
-                                  wxScrollbarVisibility vert);
-
 private:
     DECLARE_NO_COPY_CLASS(wxScrollHelper)
 };