1. Derive wxMessageDialogBase from wxDialog (why did we use multiple

inheritance here?), moved more wxMessageDialog fields into the base class
2. Added functions to set the text of message box buttons (patch 1700393,
   currently only implemented for wxMac)
3. Added wxMessageDialog::SetMessage() and SetExtendedMessage() and
   implemented them for wxMac (part of the patch), wxGTK 2.4+ and in
   a generic way for everybody else
4. Allow changing the dialog attributes between creating and showing it,
   for this the real dialog creation is now done on in ShowModal() in all
   ports


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46199 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/msgdlg.h

@@ -13,31 +13,23 @@
 #ifndef _WX_MSGBOXDLG_H_
 #define _WX_MSGBOXDLG_H_
 
-#include "wx/defs.h"
-#include "wx/dialog.h"
-
-/*
- * Message box dialog
- */
-
-class WXDLLEXPORT wxMessageDialog : public wxDialog, public wxMessageDialogBase
+class WXDLLEXPORT wxMessageDialog : public wxMessageDialogBase
 {
-DECLARE_DYNAMIC_CLASS(wxMessageDialog)
 public:
     wxMessageDialog( wxWindow*       pParent
                     ,const wxString& rsMessage
                     ,const wxString& rsCaption = wxMessageBoxCaptionStr
                     ,long            lStyle = wxOK|wxCENTRE
-                    ,const wxPoint&  rPos = wxDefaultPosition
-                   );
+                    ,const wxPoint&  WXUNUSED(rPos) = wxDefaultPosition
+                   )
+        : wxMessageDialogBase(pParent, rsMessage, rsCaption, lStyle)
+    {
+    }
 
     int ShowModal(void);
 
 protected:
-    wxString                        m_sCaption;
-    wxString                        m_sMessage;
-    wxWindow*                       m_pParent;
+    DECLARE_DYNAMIC_CLASS(wxMessageDialog)
 }; // end of CLASS wxMessageDialog
 
-#endif
-    // _WX_MSGBOXDLG_H_
+#endif // _WX_MSGBOXDLG_H_