don't allocate backbuffer for dummy surfaces

[wxWidgets.git] / include / wx / scrolwin.h

diff --git a/include/wx/scrolwin.h b/include/wx/scrolwin.h
index 4775724ba32a027c0e6be61cd88d2c97880cac38..485195577dc59043bf2b573081a37c51bb17cbd8 100644 (file)
--- a/include/wx/scrolwin.h
+++ b/include/wx/scrolwin.h
@@ -68,6 +68,10 @@ public:
     int GetScrollPageSize(int orient) const;
     void SetScrollPageSize(int orient, int pageSize);
 
+    // get the number of lines the window can scroll, 
+    // returns 0 if no scrollbars are there.
+    int GetScrollLines( int orient ) const;
+
     // Set the x, y scrolling increments.
     void SetScrollRate( int xstep, int ystep );
 
@@ -177,7 +181,7 @@ protected:
                                          : m_targetWindow->GetClientSize();
     }
 
-    void GetTargetSize(int *w, int *h)
+    void GetTargetSize(int *w, int *h) const
     {
         wxSize size = GetTargetSize();
         if ( w )
@@ -235,6 +239,7 @@ protected:
 // this macro can be used in a wxScrollHelper-derived class to forward wxWindow
 // methods to corresponding wxScrollHelper methods
 #define WX_FORWARD_TO_SCROLL_HELPER()                                         \
+public:                                                                       \
     virtual void PrepareDC(wxDC& dc) { DoPrepareDC(dc); }                     \
     virtual bool Layout() { return ScrollLayout(); }                          \
     virtual void DoSetVirtualSize(int x, int y)                               \