Add wxRichMessageDialog class.

This is a generalization of wxMessageDialog based on the native task dialog
under recent (Vista and later) Windows versions and implemented generically
for the other ports for now.

It provides the possibility to use additional controls in the message boxes
(checkbox useful for the "Don't ask me again" kind of dialogs and collapsible
detailed explanations field) and better look and feel under Windows.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65349 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dialogs/dialogs.h

@@ -191,12 +191,23 @@ class TestMessageBoxDialog : public wxDialog
 public:
     TestMessageBoxDialog(wxWindow *parent);
 
-private:
+    bool Create();
+
+protected:
+    wxString GetMessage() { return m_textMsg->GetValue(); }
+    long GetStyle();
+
+    void PrepareMessageDialog(wxMessageDialogBase &dlg);
+
+    virtual void AddAdditionalTextOptions(wxSizer *WXUNUSED(sizer)) { }
+    virtual void AddAdditionalFlags(wxSizer *WXUNUSED(sizer)) { }
+
     void OnApply(wxCommandEvent& event);
     void OnClose(wxCommandEvent& event);
     void OnUpdateLabelUI(wxUpdateUIEvent& event);
     void OnUpdateNoDefaultUI(wxUpdateUIEvent& event);
 
+private:
     enum
     {
         Btn_Yes,
@@ -240,6 +251,28 @@ private:
     wxDECLARE_NO_COPY_CLASS(TestMessageBoxDialog);
 };
 
+#if wxUSE_RICHMSGDLG
+class TestRichMessageDialog : public TestMessageBoxDialog
+{
+public:
+    TestRichMessageDialog(wxWindow *parent);
+
+protected:
+    // overrides method in base class
+    virtual void AddAdditionalTextOptions(wxSizer *sizer);
+    virtual void AddAdditionalFlags(wxSizer *sizer);
+
+    void OnApply(wxCommandEvent& event);
+
+private:
+    wxTextCtrl *m_textCheckBox;
+    wxCheckBox *m_initialValueCheckBox;
+    wxTextCtrl *m_textDetailed;
+
+    DECLARE_EVENT_TABLE()
+};
+#endif // wxUSE_RICHMSGDLG
+
 class TestDefaultActionDialog: public wxDialog
 {
 public:
@@ -302,6 +335,9 @@ public:
     void MessageBoxWindowModal(wxCommandEvent& event);
     void MessageBoxWindowModalClosed(wxWindowModalDialogEvent& event);
 #endif // wxUSE_MSGDLG
+#if wxUSE_RICHMSGDLG
+    void RichMessageDialog(wxCommandEvent& event);
+#endif // wxUSE_RICHMSGDLG
 
 #if wxUSE_COLOURDLG
     void ChooseColour(wxCommandEvent& event);
@@ -480,6 +516,7 @@ enum
     DIALOGS_MESSAGE_BOX_WINDOW_MODAL,
     DIALOGS_MESSAGE_DIALOG,
     DIALOGS_MESSAGE_BOX_WXINFO,
+    DIALOGS_RICH_MESSAGE_DIALOG,
     DIALOGS_SINGLE_CHOICE,
     DIALOGS_MULTI_CHOICE,
     DIALOGS_REARRANGE,