action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("layer",value_desc.get_layer());
action->set_param("param",value_desc.get_param_name());
action->set_param("value_node",value_node);
action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("layer",value_desc.get_layer());
action->set_param("param",value_desc.get_param_name());
action->set_param("value_node",value_node);