flex_TheUseOfFilterFunctionOfArrayCollection;

<?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" ?? ??? ??? ??? minWidth="955" minHeight="600" pageTitle="滤镜函数示例"> ?? ? ?? ?<!--fileName: TheUSEOfFilterFunction--> ?? ? ?? ?<fx:Script> ?? ??? ?<![CDATA[ ?? ??? ??? ?import mx.collections.ArrayCollection; ?? ??? ??? ?import mx.events.SliderEvent; ?? ??? ??? ? ?? ??? ??? ?[Bindable] ?? ??? ??? ?public var salesAC:ArrayCollection = new ArrayCollection([ ?? ??? ??? ??? ?{name: "加拿大",sales: 295323},?? ??? ??? ??? ?{name: "美国",sales: 982832},?? ??? ??? ??? ?{name: "英格兰",sales: 109283},?? ??? ??? ??? ?{name: "巴西",sales: 12495},?? ??? ??? ??? ?{name: "印度",sales: 597232},?? ??? ??? ??? ?{name: "中国",sales: 682011} ?? ??? ??? ?]); ?? ??? ??? ? ?? ??? ??? ?public function filterFun(item:Object):Boolean ?? ??? ??? ?{ ?? ??? ??? ??? ?if(item.sales >= salesRange.values[0] && item.sales <= salesRange.values[1]) { ?? ??? ??? ??? ??? ?return true; ?? ??? ??? ??? ?}else { ?? ??? ??? ??? ??? ?return false; ?? ??? ??? ??? ?} ?? ??? ??? ?} ?? ??? ??? ? ?? ??? ??? ?protected function salesRange_changeHandler(event:SliderEvent):void ?? ??? ??? ?{ ?? ??? ??? ??? ?salesAC.filterFunction = filterFun; ?? ??? ??? ??? ?salesAC.refresh(); ?? ??? ??? ?} ?? ??? ??? ? ?? ??? ?]]> ?? ?</fx:Script> ?? ? ?? ?<fx:Declarations> ?? ??? ?<!-- 将非可视元素（例如服务、值对象）放在此处 --> ?? ?</fx:Declarations> ?? ? ?? ?<!--view--> ?? ?<mx:Panel width="400" height="300" title="销售量统计" verticalCenter="0" horizontalCenter="0"> ?? ??? ?<mx:HSlider id="salesRange" change="salesRange_changeHandler(event)" width="100%" ?? ??? ??? ??? ??? ?thumbCount="2" labels="['0','250000','500000','750000','1000000']" ?? ??? ??? ??? ??? ?tickInterval="50000" height="50" maximum="1000000"/> ?? ??? ? ?? ??? ?<mx:DataGrid id="dgrid" dataProvider="{salesAC}" width="100%" height="100%"> ?? ??? ??? ?<mx:columns> ?? ??? ??? ??? ?<mx:DataGridColumn headerText="国家" dataField="name"/> ?? ??? ??? ??? ?<mx:DataGridColumn headerText="销售量" dataField="sales"/> ?? ??? ??? ?</mx:columns> ?? ??? ?</mx:DataGrid> ?? ?</mx:Panel> ?? ? </s:Application>