ref = Gnome::Glade::Xml::create("constructor.glade", "item_pty_wnd");
ref->get_widget_derived("item_pty_wnd",property_wnd);
caudal_max = 0.0;
+ is_union = true;
property_wnd->item = this;
menu_image_propiedades.set(Gtk::Stock::PREFERENCES, Gtk::ICON_SIZE_MENU);
menu_image_delete.set(Gtk::Stock::CANCEL, Gtk::ICON_SIZE_MENU);