解读Flex多样化饼图样式-51CTO.COM

本文和大家重点讨论一下多样化Flex饼图样式，主要包括颜色渐变，点击分离和环形等，相信通过本文的介绍你对Flex饼图的样式一定会有新的认识。

Flex多样化饼图样式

创建一个简单的环形Flex饼图，通过PieChart的innerRadius属性进行设置实现环形效果：

Xml代码

<?xmlversionxmlversion="1.0"encoding="utf-8"?> 
<mx:Applicationxmlns:mxmx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"layout="absolute"> 
<mx:Script> 
<![CDATA[  
importmx.collections.ArrayCollection;  
importmx.charts.HitData;  
[Bindable]  
publicvarchengjiPie:ArrayCollection=newArrayCollection([  
{classs:"60分以下",num:5},  
{classs:"60~70分",num:4},  
{classs:"70~80分",num:5},  
{classs:"80~90分",num:4},  
{classs:"90分以上",num:3}]);  
 
privatefunctiondisplayGold(data:Object,field:String,index:Number,percentValue:Number):String{  
vartemp:String=(""+percentValue).substr(0,6);  
returndata.classs+":"+'\n'+temp+"%";  
}  
 
]]> 
 
</mx:Script> 
 
<mx:SolidColoridmx:SolidColorid="sc1"color="0xE46899"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc2"color="0xAAD71A"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc3"color="0xFFE30E"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc4"color="0xFDB500"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc5"color="0x4CD0EF"alpha=".6"/> 
 
 
<mx:Strokeidmx:Strokeid="callouts"weight="2"color="0x999999"alpha=".8"caps="square"/> 
<mx:Strokeidmx:Strokeid="radial"weight="1"color="0xFFFFCC"alpha=".3"/> 
<mx:Strokeidmx:Strokeid="pieborder"color="0x000000"weight="2"alpha=".5"/> 
 
 
<mx:Panelheightmx:Panelheight="100%"width="100%"layout="absolute"fontSize="12"> 
 
<mx:PieChartidmx:PieChartid="chart"showDataTips="true"width="100%"height="100%"  
dataProvider="{chengjiPie}"innerRadius=".3"horizontalCenter="0"verticalCenter="0"> 
 
<mx:series> 
<mx:Array> 
<mx:PieSeriesnameFieldmx:PieSeriesnameField="classs"labelPosition="callout"field="num" 
labelFunction="displayGold"> 
 
</mx:PieSeries> 
</mx:Array> 
</mx:series> 
 
</mx:PieChart> 
<mx:LegenddataProvidermx:LegenddataProvider="{chart}"right="0"bottom="0"/> 
</mx:Panel> 
 
</mx:Application> 
 
<?xmlversionxmlversion="1.0"encoding="utf-8"?> 
<mx:Applicationxmlns:mxmx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"layout="absolute"> 
<mx:Script> 
<![CDATA[  
importmx.collections.ArrayCollection;  
importmx.charts.HitData;  
[Bindable]  
publicvarchengjiPie:ArrayCollection=newArrayCollection([  
{classs:"60分以下",num:5},  
{classs:"60~70分",num:4},  
{classs:"70~80分",num:5},  
{classs:"80~90分",num:4},  
{classs:"90分以上",num:3}]);  
 
privatefunctiondisplayGold(data:Object,field:String,index:Number,percentValue:Number):String{  
vartemp:String=(""+percentValue).substr(0,6);  
returndata.classs+":"+'\n'+temp+"%";  
}  
 
]]> 
 
</mx:Script> 
 
<mx:SolidColoridmx:SolidColorid="sc1"color="0xE46899"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc2"color="0xAAD71A"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc3"color="0xFFE30E"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc4"color="0xFDB500"alpha=".6"/> 
<mx:SolidColoridmx:SolidColorid="sc5"color="0x4CD0EF"alpha=".6"/> 
 
 
<mx:Strokeidmx:Strokeid="callouts"weight="2"color="0x999999"alpha=".8"caps="square"/> 
<mx:Strokeidmx:Strokeid="radial"weight="1"color="0xFFFFCC"alpha=".3"/> 
<mx:Strokeidmx:Strokeid="pieborder"color="0x000000"weight="2"alpha=".5"/> 
 
 
<mx:Panelheightmx:Panelheight="100%"width="100%"layout="absolute"fontSize="12"> 
 
<mx:PieChartidmx:PieChartid="chart"showDataTips="true"width="100%"height="100%"  
dataProvider="{chengjiPie}"innerRadius=".3"horizontalCenter="0"verticalCenter="0"> 
 
<mx:series> 
<mx:Array> 
<mx:PieSeriesnameFieldmx:PieSeriesnameField="classs"labelPosition="callout"field="num" 
labelFunction="displayGold"> 
 
 </mx:PieSeries> 
</mx:Array> 
</mx:series> 
 
</mx:PieChart> 
<mx:LegenddataProvidermx:LegenddataProvider="{chart}"right="0"bottom="0"/> 
</mx:Panel> 
 
</mx:Application> 
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◆在这个简单Flex饼图的基础上进行一些改动就可以实现多样化：

1添加Flex饼图上颜色块的渐变效果，用到RadialGradient标签.

2实现鼠标点击，该块分离的效果，对PieSeries进行相关属性设置，explodeRadius:分离程度。PerWedgeExplodeRadius:数组规定出每一块的分离值。

3添加动态效果，点击时的弹动变化。showDataEffect标签处添加Elastic.easeOut震动效果。

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