action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("parent_value_node",value_desc.get_parent_value_node());
action->set_param("value_node", value_node);
action->set_param("index",value_desc.get_index());
action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("parent_value_node",value_desc.get_parent_value_node());
action->set_param("value_node", value_node);
action->set_param("index",value_desc.get_index());