Call wxTLW::SetDefaultItem() from wxButtonBase::SetDefault() instead of doing

it in wxButton implementations in (almost) all ports; changed its return type
to "wxWindow *" from "void" to accommodate the ports needing the old default
item (replaces part of patch 1696563)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45338 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/bmpbuttn.h

@@ -44,7 +44,6 @@ public:
 
     // Implementation
     virtual bool SetBackgroundColour(const wxColour& colour);
-    virtual void SetDefault();
     virtual bool MSWOnDraw(WXDRAWITEMSTRUCT *item);
     virtual void DrawFace( WXHDC dc, int left, int top, int right, int bottom, bool sel );
     virtual void DrawButtonFocus( WXHDC dc, int left, int top, int right, int bottom, bool sel );

include/wx/msw/button.h

@@ -43,7 +43,7 @@ public:
 
     virtual ~wxButton();
 
-    virtual void SetDefault();
+    virtual wxWindow *SetDefault();
 
     // implementation from now on
     virtual void Command(wxCommandEvent& event);