-static void gtk_notebook_page_change_callback(GtkNotebook *WXUNUSED(widget),
-                                              GtkNotebookPage *WXUNUSED(page),
-                                              guint page,
-                                              wxNotebook *notebook )
-{
-    // are you trying to call SetSelection() from a notebook event handler?
-    // you shouldn't!
-    wxCHECK_RET( !notebook->m_inSwitchPage,
-                 _T("gtk_notebook_page_change_callback reentered") );
-
-    notebook->m_inSwitchPage = true;
-    if (g_isIdle)
-        wxapp_install_idle_handler();
-
-    int old = notebook->GetSelection();
-
-    wxNotebookEvent eventChanging( wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGING,
-                                   notebook->GetId(), page, old );
-    eventChanging.SetEventObject( notebook );
-
-    if ( (notebook->GetEventHandler()->ProcessEvent(eventChanging)) &&
-         !eventChanging.IsAllowed() )
-    {
-        /* program doesn't allow the page change */
-        g_signal_stop_emission_by_name (notebook->m_widget,
-                                        "switch_page");
-    }
-    else // change allowed
-    {
-        // make wxNotebook::GetSelection() return the correct (i.e. consistent
-        // with wxNotebookEvent::GetSelection()) value even though the page is
-        // not really changed in GTK+
-        notebook->m_selection = page;
-
-        wxNotebookEvent eventChanged( wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED,
-                                      notebook->GetId(), page, old );
-        eventChanged.SetEventObject( notebook );
-        notebook->GetEventHandler()->ProcessEvent( eventChanged );
-    }
-
-    notebook->m_inSwitchPage = false;
-}