pielabels.mxml

chart应用蛮广泛的

<?xml version="1.0" encoding="utf-8"?>
<ex:ExampleBase  xmlns:ex="examples.*" xmlns="http://www.adobe.com/2006/mxml">

	<Script>
		<![CDATA[
		
			override public function get descriptions():Array { 
				return ["a simple pie chart"];
			}
			public function genData():void
			{
				var newData:Array = [];
				var A:Number = Math.random()*100 - 50;
				var B:Number = A - Math.random() * 10;
				var P:Number = Math.random()*100;
				for(var i:int = 0;i<dataCount.value;i++)
				{
					A = A + Math.random()*10 - 5;
					B = A - Math.random() * 10;
					P = Math.random()*100;
					newData.push( 
					{
						A: A,
						B: B,
						P: P
					}
					);
				}
				dataSet = newData;
			}
			public function lfunc(...args):String
			{
				return "this is value " + Math.floor(args[0].P);
			}
			
			[Bindable] public var dataSet:Array;
																							
		]]>
	</Script>		
	
	<ex:controls>
		<ComboBox id="lpos">
			<dataProvider>
				<String>none</String>
				<String>outside</String>
				<String>inside</String>
				<String>insideWithCallout</String>
				<String>callout</String>
			</dataProvider>
	  	</ComboBox>
		<Label text="data size:" />
		<HSlider width="100" minimum="0" maximum="50" value="5" snapInterval="1" liveDragging="true" id="dataCount" change="genData()" />
	</ex:controls>
		
	
	<PieChart id="chart" width="100%" height="100%" dataProvider="{dataSet}" initialize="genData();">
		<series>
			<PieSeries field="P" labelPosition="{lpos.value}" labelFunction="lfunc"/>
		</series>
	</PieChart>

</ex:ExampleBase>