Flex实现双轴组合图的设计思路及代码

 
<?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" 
width="100%" height="100%"> 
<s:layout> 
<s:BasicLayout/> 
</s:layout> 
<fx:Declarations> 
<s:SolidColor id="sc1" color="0x00BFFF" alpha=".3"/> 
<mx:SolidColorStroke id="s1" color="0x00BFFF" weight="2"/> 
</fx:Declarations> 

<fx:Script> 
<![CDATA[ 
import mx.collections.ArrayCollection; 

//组合图数据绑定 
[Bindable] 
private var gridArray:ArrayCollection = new ArrayCollection([ 
{quarter:"第一季度",Monday:"78454",Tuesday:"45454",Wednesday:"12012",Thursday:"78441",Friday:"32314",Saturday:"89454",Sunday:"45421",Rate:"23"}, 
{quarter:"第二季度",Monday:"56444",Tuesday:"65612",Wednesday:"78454",Thursday:"45124",Friday:"35451",Saturday:"45421",Sunday:"65421",Rate:"47"}, 
{quarter:"第三季度",Monday:"51210",Tuesday:"94210",Wednesday:"65643",Thursday:"45011",Friday:"45122",Saturday:"45421",Sunday:"65988",Rate:"13"}, 
{quarter:"第四季度",Monday:"61210",Tuesday:"45122",Wednesday:"65323",Thursday:"95110",Friday:"65623",Saturday:"45111",Sunday:"65311",Rate:"17"} 
]); 
]]> 
</fx:Script> 

<mx:VBox width="100%" height="100%"> 
<mx:ColumnChart id="chart" width="100%" height="90%" showDataTips="true" fontSize="16" dataProvider="{gridArray}"> 
<!--设置水平坐标轴--> 
<mx:horizontalAxis> 
<mx:CategoryAxis dataProvider="{}" categoryField="quarter"/> 
</mx:horizontalAxis> 
<!--设置左竖直坐标轴的最大值和最小值--> 
<mx:verticalAxis> 
<mx:LinearAxis minimum="0.00" maximum="100000.00"/> 
</mx:verticalAxis> 
<!--设置左竖直坐标轴的柱形图--> 
<mx:series> 
<mx:ColumnSeries id="column1" xField="quarter" yField="Monday" displayName="星期一"/> 
<mx:ColumnSeries id="column2" xField="quarter" yField="Tuesday" displayName="星期二"/> 
<mx:ColumnSeries id="column3" xField="quarter" yField="Wednesday" displayName="星期三"/> 
<mx:ColumnSeries id="column4" xField="quarter" yField="Thursday" displayName="星期四"/> 
<mx:ColumnSeries id="column5" xField="quarter" yField="Friday" displayName="星期六"/> 
<mx:ColumnSeries id="column6" xField="quarter" yField="Saturday" displayName="星期七"/> 
<mx:ColumnSeries id="column7" xField="quarter" yField="Sunday" displayName="星期八"/> 
</mx:series> 
<!--设置右竖直坐标轴的最大值和最小值--> 
<mx:secondVerticalAxis> 
<mx:LinearAxis minimum="0.00" maximum="100.00"/> 
</mx:secondVerticalAxis> 
<!--设置右竖直坐标轴的折线--> 
<mx:secondSeries> 
<mx:LineSeries id="line" dataProvider="{gridArray}" xField="quarter" yField="Rate" displayName="比率"/> 
</mx:secondSeries> 
</mx:ColumnChart> 
<!--设置Legend属性--> 
<mx:HBox> 
<s:Label width="25"/> 
<mx:Legend dataProvider="{chart}" fontSize="20" width="100%" height="30" direction="horizontal" horizontalGap="45" verticalGap="45"/> 
</mx:HBox> 

</mx:VBox> 
</s:Application>