-    if (g_isIdle)
-        wxapp_install_idle_handler();
-
-    if (!win->m_hasVMT) return FALSE;
-    if (g_blockEventsOnDrag) return FALSE;
-
-    /* win is a control: tab can be propagated up */
-    if ((gdk_event->keyval == GDK_Tab) || (gdk_event->keyval == GDK_ISO_Left_Tab))
-    {
-        int sel = win->GetSelection();
-        wxGtkNotebookPage *page = win->GetNotebookPage(sel);
-        wxCHECK_MSG( page, FALSE, _T("invalid selection in wxNotebook") );
-
-        wxNavigationKeyEvent event;
-        event.SetEventObject( win );
-        /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
-        event.SetDirection( (gdk_event->keyval == GDK_Tab) );
-        /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
-        event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
-        event.SetCurrentFocus( win );
-
-        wxNotebookPage *client = win->GetPage(sel);
-        if ( !client->GetEventHandler()->ProcessEvent( event ) )
-        {
-             client->SetFocus();
-        }
+    g_signal_handlers_block_by_func(widget, (void*)event_after, win);
+    g_signal_handlers_block_by_func(widget, (void*)switch_page, win);