flex饼图

http://livedocs.adobe.com/flex/3/html/help.html?content=charts_types_09.html 

PieSeries类属性：

field:指定数据域，以此饼图中每个扇区的数据。me:即大小。

nameField:指定数据域，用作提示数据和图例数据。

例 基本图表

 <?xml version="1.0"?>

<!-- charts/BasicPie.mxml -->

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

  <mx:Script><![CDATA[

     import mx.collections.ArrayCollection;

     [Bindable]

     public var expenses:ArrayCollection = new ArrayCollection([

        {Expense:"Taxes", Amount:2000},

        {Expense:"Rent", Amount:1000},

        {Expense:"Bills", Amount:100},

        {Expense:"Car", Amount:450},

        {Expense:"Gas", Amount:100},

        {Expense:"Food", Amount:200}

     ]);

  ]]></mx:Script>

  <mx:Panel title="Pie Chart">

     <mx:PieChart id="myChart" 

        dataProvider="{expenses}" 

        showDataTips="true"

     >

        <mx:series>

           <mx:PieSeries 

                field="Amount" 

                nameField="Expense" 

                labelPosition="callout"

           />

        </mx:series>

     </mx:PieChart>

     <mx:Legend dataProvider="{myChart}"/>

  </mx:Panel>

</mx:Application>

 运行

例 自定义饼图填充色

<?xml version="1.0"?>
<!-- charts/PieFilling.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script><![CDATA[
        import mx.collections.ArrayCollection;

        [Bindable]
        public var expenses:ArrayCollection = new ArrayCollection([
            {Expense:"Taxes", Amount:2000},
            {Expense:"Rent", Amount:1000},
            {Expense:"Bills", Amount:100},
            {Expense:"Car", Amount:450},
            {Expense:"Gas", Amount:100},
            {Expense:"Food", Amount:200}
        ]);
    ]]></mx:Script>

    <!-- Define custom colors for use as pie wedge fills. -->
    <mx:SolidColor id="sc1" color="blue" alpha=".3"/>
    <mx:SolidColor id="sc2" color="red" alpha=".3"/>
    <mx:SolidColor id="sc3" color="green" alpha=".3"/>
    <mx:SolidColor id="sc4" color="gray" alpha=".3"/>
    <mx:SolidColor id="sc5" color="black" alpha=".3"/>
    <mx:SolidColor id="sc6" color="yellow" alpha=".3"/>

    <mx:Panel title="PieChart control with custom fills">
        <mx:PieChart id="pie" 
            dataProvider="{expenses}" 
            showDataTips="true"
        >
            <mx:series>
                <mx:PieSeries 
                    field="Amount" 
                    nameField="Expense"
                    labelPosition="callout"
                    fills="{[sc1, sc2, sc3, sc4, sc5, sc6]}"
                />
            </mx:series>
        </mx:PieChart>
        <mx:Legend dataProvider="{pie}"/>
    </mx:Panel>

</mx:Application>

运行