action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("value_node",ValueNode::Handle::cast_static(value_node));
action->set_param("canvas",get_canvas());
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("value_node",ValueNode::Handle::cast_static(value_node));