added wxRenderer::DrawTextBorder() to deal with GTK+ text borders

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8811 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/textctrl.h

@@ -250,7 +250,7 @@ public:
     // override this to take into account our scrollbar-less scrolling
     virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
 
-    // set the right colours
+    // set the right colours and border
     virtual bool IsContainerWindow() const { return TRUE; }
     virtual wxBorder GetDefaultBorder() const { return wxBORDER_SUNKEN; }
 
@@ -271,6 +271,8 @@ protected:
 
     void DoDrawTextInRect(wxDC& dc, const wxRect& rectUpdate);
 
+    // override base class methods
+    virtual void DoDrawBorder(wxDC& dc, const wxRect& rect);
     virtual void DoDraw(wxControlRenderer *renderer);
 
     // calc the size from the text extent