drp_type->append(format("%d %s", i->second->get_article_number(), i->second->get_name()));
if(train && i->second==&train->get_locomotive_type())
drp_type->set_selected_index(n);
drp_type->append(format("%d %s", i->second->get_article_number(), i->second->get_name()));
if(train && i->second==&train->get_locomotive_type())
drp_type->set_selected_index(n);