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