Three more attempts to get metal look.

- Added a few flags for inheriting background.
     - Added wxWindow param to wxR::DrawBackground()
     - Added wxR::DrawButtonSurface()
     - Removed wxR::DrawBackground() from wxR::DrawButtonBorder()
     - Adde DrawMetal to Metal theme
  Fixed minor bug in wxGTK scrollbar.
  Changed code in wxX11 wxTLW so that startup flicker no
    longer occurs in wxFrame.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15136 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/renderer.h

@@ -69,7 +69,16 @@ public:
     virtual void DrawBackground(wxDC& dc,
                                 const wxColour& col,
                                 const wxRect& rect,
-                                int flags) = 0;
+                                int flags,
+                                wxWindow *window = NULL ) = 0;
+
+    // draw the button surface
+    virtual void DrawButtonSurface(wxDC& dc,
+                                const wxColour& col,
+                                const wxRect& rect,
+                                int flags )
+        { DrawBackground( dc, col, rect, flags ); }
+                                
 
     // draw the label inside the given rectangle with the specified alignment
     // and optionally emphasize the character with the given index
@@ -497,8 +506,9 @@ public:
     virtual void DrawBackground(wxDC& dc,
                                 const wxColour& col,
                                 const wxRect& rect,
-                                int flags)
-        { m_renderer->DrawBackground(dc, col, rect, flags); }
+                                int flags,
+                                wxWindow *window = NULL )
+        { m_renderer->DrawBackground(dc, col, rect, flags, window ); }
     virtual void DrawLabel(wxDC& dc,
                            const wxString& label,
                            const wxRect& rect,