widget_class->focus = gtk_xpaned_focus;
widget_class->enter_notify_event = gtk_xpaned_enter;
widget_class->leave_notify_event = gtk_xpaned_leave;
widget_class->focus = gtk_xpaned_focus;
widget_class->enter_notify_event = gtk_xpaned_enter;
widget_class->leave_notify_event = gtk_xpaned_leave;