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/gtk/msgdlg.h

@@ -9,27 +9,18 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifndef __MSGDLG_H__
-#define __MSGDLG_H__
+#ifndef _WX_GTK_MSGDLG_H_
+#define _WX_GTK_MSGDLG_H_
 
-#include "wx/defs.h"
-#include "wx/dialog.h"
-
-// type is an 'or' (|) of wxOK, wxCANCEL, wxYES_NO
-// Returns wxYES/NO/OK/CANCEL
-
-WXDLLEXPORT_DATA(extern const wxChar) wxMessageBoxCaptionStr[];
-
-class WXDLLEXPORT wxMessageDialog: public wxDialog, public wxMessageDialogBase
+class WXDLLEXPORT wxMessageDialog : public wxMessageDialogBase
 {
 public:
     wxMessageDialog(wxWindow *parent, const wxString& message,
                     const wxString& caption = wxMessageBoxCaptionStr,
                     long style = wxOK|wxCENTRE,
                     const wxPoint& pos = wxDefaultPosition);
-    virtual ~wxMessageDialog();
 
-    int ShowModal();
+    virtual int ShowModal();
     virtual bool Show( bool WXUNUSED(show) = true ) { return false; };
 
 protected:
@@ -42,10 +33,11 @@ protected:
                               int WXUNUSED(width), int WXUNUSED(height)) {}
 
 private:
-    wxString m_caption;
-    wxString m_message;
+    // create the real GTK+ dialog: this is done from ShowModal() to allow
+    // changing the message between constructing the dialog and showing it
+    void GTKCreateMsgDialog();
 
     DECLARE_DYNAMIC_CLASS(wxMessageDialog)
 };
 
-#endif
+#endif // _WX_GTK_MSGDLG_H_