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

src/gtk/button.cpp

@@ -12,10 +12,8 @@
 
 #if wxUSE_BUTTON
 
-#include "wx/button.h"
-
 #ifndef WX_PRECOMP
-    #include "wx/toplevel.h"
+    #include "wx/button.h"
 #endif
 
 #include "wx/stockitem.h"
@@ -167,18 +165,17 @@ bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 }
 
 
-void wxButton::SetDefault()
+wxWindow *wxButton::SetDefault()
 {
-    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
-    wxCHECK_RET( tlw, _T("button without top level window?") );
-
-    tlw->SetDefaultItem(this);
+    wxWindow *oldDefault = wxButtonBase::SetDefault();
 
     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
     gtk_widget_grab_default( m_widget );
 
     // resize for default border
     gtk_button_style_set_callback( m_widget, NULL, this );
+
+    return oldDefault;
 }
 
 /* static */