Flash 手动滚动列表

我需要使用箭头键手动处理在列表中的滚动，同时我成功地处理了通过项目更改选择的操作，如果列表大于其显示，并且需要使用滚动条，则滚动条不会滚动所选项目

这就是我现在所拥有的：

        function completionListUpDown(direction:Boolean):void{
            if(direction){
                if(popUp.completionList.dataProvider.length == (popUp.completionList.selectedIndex + 1)){
                    popUp.completionList.selectedIndex = 0;
                }
                else{
                    popUp.completionList.selectedIndex += 1;
                }

            }
            else{
                if(0 == popUp.completionList.selectedIndex){
                    popUp.completionList.selectedIndex = popUp.completionList.dataProvider.length - 1;
                }
                else{
                    popUp.completionList.selectedIndex -= 1;
                }
            }
        }

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这会像一个符咒一样在项目中滚动，但是如果有一个垂直滚动条，那么该滚动条将不会滚动。如何使滚动条滚动？

哈哈，不管我刚找到解决方案，只要使用ensureIndexIsVisible（selectedIndex）

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女巫名单班？来自Flex（mx软件包）？来自火花？第三方lib？sparks但我已经解决了

        function completionListUpDown(direction:Boolean):void{
            if(direction){
                if(popUp.completionList.dataProvider.length == (popUp.completionList.selectedIndex + 1)){
                    popUp.completionList.selectedIndex = 0;
                }
                else{
                    popUp.completionList.selectedIndex += 1;
                }

            }
            else{
                if(0 == popUp.completionList.selectedIndex){
                    popUp.completionList.selectedIndex = popUp.completionList.dataProvider.length - 1;
                }
                else{
                    popUp.completionList.selectedIndex -= 1;
                }
            }
            popUp.completionList.ensureIndexIsVisible(popUp.completionList.selectedIndex);
        }