+                                              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;
+}
+}
+
+//-----------------------------------------------------------------------------
+// "size_allocate"
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static void gtk_page_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxWindow *win )
+{
+    if (g_isIdle)
+        wxapp_install_idle_handler();
+
+    if ((win->m_x == alloc->x) &&
+        (win->m_y == alloc->y) &&
+        (win->m_width == alloc->width) &&
+        (win->m_height == alloc->height))
+    {
+        return;
+    }
+
+    win->SetSize( alloc->x, alloc->y, alloc->width, alloc->height );
+
+    /* GTK 1.2 up to version 1.2.5 is broken so that we have to call allocate
+       here in order to make repositioning after resizing to take effect. */
+    if ((gtk_major_version == 1) &&
+        (gtk_minor_version == 2) &&
+        (gtk_micro_version < 6) &&
+        (win->m_wxwindow) &&
+        (GTK_WIDGET_REALIZED(win->m_wxwindow)))
+    {
+        gtk_widget_size_allocate( win->m_wxwindow, alloc );
+    }
+}
+}
+
+//-----------------------------------------------------------------------------
+// "realize" from m_widget
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static void
+gtk_notebook_realized_callback( GtkWidget * WXUNUSED(widget), wxWindow *win )
+{
+    if (g_isIdle)
+        wxapp_install_idle_handler();
+
+    /* GTK 1.2 up to version 1.2.5 is broken so that we have to call a queue_resize
+       here in order to make repositioning before showing to take effect. */
+    gtk_widget_queue_resize( win->m_widget );
+}
+}
+
+//-----------------------------------------------------------------------------
+// "key_press_event"
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static gboolean
+gtk_notebook_key_press_callback( GtkWidget   *widget,
+                                 GdkEventKey *gdk_event,
+                                 wxNotebook  *notebook )