Method menu_about_to_show

src/laybasic/laybasic/layAbstractMenu.cc:563–589

#if defined(HAVE_QT)
void
Action::menu_about_to_show ()
{
  //  keeps a reference to self in case the action handler code removes actions
  tl::shared_ptr<Action> self_holder (this);

  BEGIN_PROTECTED

  on_menu_opening_event ();
  menu_opening ();

  if (! mp_dispatcher || ! mp_dispatcher->menu ()) {
    return;
  }
  AbstractMenuItem *item = mp_dispatcher->menu ()->find_item_for_action (this);
  if (! item ) {
    return;
  }

  for (auto i = item->children.begin (); i != item->children.end (); ++i) {
    if (i->action ()) {
      i->action ()->sync_qaction ();
    }
  }

  END_PROTECTED
}
#endif

#if defined(HAVE_QT)