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>