DB( g_print("\n[ui-start] property_change_action\n") );
data = g_object_get_data(G_OBJECT(gtk_widget_get_ancestor(widget, GTK_TYPE_WINDOW)), "inst_data");
data->curfmt = NULL;
DB( g_print("\n[ui-start] property_change_action\n") );
data = g_object_get_data(G_OBJECT(gtk_widget_get_ancestor(widget, GTK_TYPE_WINDOW)), "inst_data");
data->curfmt = NULL;