+ Glib::RefPtr<Gnome::Glade::Xml> ref;
+ 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;
+ is_connected = false;
+ property_wnd->item = this;