textLayoutFramework,如何创建一个单行输入框

private function addTLFField(t:TextFlow, s:Sprite, w:Number, h:Number):void{
            var control:ContainerController = new ContainerController(s, w, h);
            var um:UndoManager = new UndoManager();
            editManager = new CustomEditManagner(um);
            t.interactionManager = editManager;
            t.lineBreak = LineBreak.EXPLICIT;
            t.flowComposer.addController(control);
            t.flowComposer.updateAllControllers();
        }

CustomEditManagner为自定义的editmanager ，需要重写 按键事件 屏蔽掉回车键。