Flex中怎么给表格中的滚动栏定位-阿里云开发者社区

1、问题背景

假设表格中的字段过多，会出现滚动栏，在将滚动栏滚到一定的位置时，又一次刷新表格。滚动栏会回到原处，原来查看的字段还得继续滚动，才干查看到。

2、实现实例

<?

xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="initHandler(event)" width="100%" height="100%"> <s:layout> <s:BasicLayout/> </s:layout> <fx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.events.FlexEvent; [Bindable] //表格数据绑定 private var gridArray:ArrayCollection = new ArrayCollection([ {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"}, {Jan:"5678",Feb:"7890",Mar:"3454",Apr:"4565",May:"6756",Jun:"5656",Jul:"7867",Aug:"8990",Sep:"5676",Oct:"4655",Nov:"6778",Dec:"8909", Jan1:"3344",Feb1:"5676",Mar1:"7898",Apr1:"9089",May1:"9009",Jun1:"5675",Jul1:"3433",Aug1:"4455",Sep1:"6676",Oct1:"7867",Nov1:"4556",Dec1:"8656"} ]); /** * 初始化函数 */ protected function initHandler(event:FlexEvent):void { } /** * 刷新button函数 */ protected function refresh_clickHandler(event:MouseEvent):void { var hx:Object = hsb.left; var hy:Number = hsb.y; //var dx:Number = dataGrid.contentMouseX; //var dy:Number = dataGrid.contentMouseY; //Alert.show("hx："+hx+"\n"+"hy: "+hy + "\n" + "dx: " + dx + "\n" + "dy: " + dy); Alert.show("hx："+hx+"\n"+"hy: "+hy); } ]]> </fx:Script> <fx:Declarations>  </fx:Declarations> <mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="20" paddingTop="10" horizontalAlign="center"> <mx:HBox width="100%" height="30"> <s:Label width="100%"/> <s:Button id="refresh" label="刷新" click="refresh_clickHandler(event)"/> </mx:HBox> <mx:DataGrid width="1350" height="90%" id="dataGrid" dataProvider="{gridArray}" horizontalScrollPolicy="on" textAlign="center"> <mx:columns> <mx:DataGridColumn headerText="2013年01月" dataField="Jan" width="200"/> <mx:DataGridColumn headerText="2013年02月" dataField="Feb" width="200"/> <mx:DataGridColumn headerText="2013年03月" dataField="Mar" width="200"/> <mx:DataGridColumn headerText="2013年04月" dataField="Apr" width="200"/> <mx:DataGridColumn headerText="2013年05月" dataField="May" width="200"/> <mx:DataGridColumn headerText="2013年06月" dataField="Jun" width="200"/> <mx:DataGridColumn headerText="2013年07月" dataField="Jul" width="200"/> <mx:DataGridColumn headerText="2013年08月" dataField="Aug" width="200"/> <mx:DataGridColumn headerText="2013年09月" dataField="Sep" width="200"/> <mx:DataGridColumn headerText="2013年10月" dataField="Oct" width="200"/> <mx:DataGridColumn headerText="2013年11月" dataField="Nov" width="200"/> <mx:DataGridColumn headerText="2013年12月" dataField="Dec" width="200"/> <mx:DataGridColumn headerText="2014年01月" dataField="Jan1" width="200"/> <mx:DataGridColumn headerText="2014年02月" dataField="Feb1" width="200"/> <mx:DataGridColumn headerText="2014年03月" dataField="Mar1" width="200"/> <mx:DataGridColumn headerText="2014年04月" dataField="Apr1" width="200"/> <mx:DataGridColumn headerText="2014年05月" dataField="May1" width="200"/> <mx:DataGridColumn headerText="2014年06月" dataField="Jun1" width="200"/> <mx:DataGridColumn headerText="2014年07月" dataField="Jul1" width="200"/> <mx:DataGridColumn headerText="2014年08月" dataField="Aug1" width="200"/> <mx:DataGridColumn headerText="2014年09月" dataField="Sep1" width="200"/> <mx:DataGridColumn headerText="2014年10月" dataField="Oct1" width="200"/> <mx:DataGridColumn headerText="2014年11月" dataField="Nov1" width="200"/> <mx:DataGridColumn headerText="2014年12月" dataField="Dec1" width="200"/> </mx:columns> </mx:DataGrid>  <s:HScrollBar id="hsb" width="100%"/> </mx:VBox> </s:Application>

3、实现结果