added code to test UI updating of menu items in MDI apps

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40267 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/mdi/mdi.h

@@ -28,7 +28,11 @@ public:
 
     void OnEvent(wxMouseEvent& event);
 
+    void SetText(const wxString& text) { m_text = text; Refresh(); }
+
 private:
+    wxString m_text;
+
     bool m_dirty;
 
     DECLARE_EVENT_TABLE()
@@ -73,6 +77,11 @@ public:
     void OnMove(wxMoveEvent& event);
     void OnClose(wxCloseEvent& event);
 
+#if wxUSE_CLIPBOARD
+    void OnPaste(wxCommandEvent& event);
+    void OnUpdatePaste(wxUpdateUIEvent& event);
+#endif // wxUSE_CLIPBOARD
+
     DECLARE_EVENT_TABLE()
 };