Flex：在LineChart图表中格式化双轴线

lineChart.mxml ：

<?xml version="1.0"?>
<!-- Simple example to demonstrate the GridLines class. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:comp="com.*">
    <mx:Script>
        <![CDATA[
            import mx.charts.CategoryAxis; 
            import mx.charts.chartClasses.IAxis; 
        import mx.collections.ArrayCollection;
        import mx.charts.series.items.PieSeriesItem;
        import mx.charts.HitData;
         import custer.MyLabel;
         import mx.effects.easing.*;
                 import mx.controls.Alert;
        import mx.charts.series.LineSeries;
        import mx.charts.chartClasses.DataTransform; 
        import mx.charts.chartClasses.CartesianTransform;
        import mx.charts.series.items.LineSeriesItem;
              
               private function linearAxis_labelFunc(item:Object, prevValue:Object, axis:IAxis):String { 
                return currFormatter.format(item); 
            } 
                     
         private function init(evt:Event):void {
                var chart:CustomLineChart = evt.currentTarget as CustomLineChart;
                seriesFilterArr = chart.seriesFilters;
                 var len:uint = linechart.seriesFilters.length;
                 if (len > 0) {
                    linechart.seriesFilters = [];
                } else {
                    linechart.seriesFilters = seriesFilterArr;
                }
            } 
            function CustomLineChart_dataTipFunction(item:HitData):String { 
       // var LCI:LineSeries = item.chartItem as LineSeries; 
        //return "<b>高度/时间</b><br />时间：" + LCI.item.time + "<br/>高度："+LCI.item.height+"米";
        tit.label = "<b>高度/时间</b><br />时间我们的";
        
        var dt:String = "";
        var this_series:LineSeries = LineSeries(item.element);
        var dataTransform:DataTransform = this_series.dataTransform;
         var vertical_axis:LinearAxis = LinearAxis(dataTransform.getAxis(CartesianTransform.VERTICAL_AXIS));
         var horizontal_axis:CategoryAxis = CategoryAxis(dataTransform.getAxis(CartesianTransform.HORIZONTAL_AXIS));

         var actionItemID:String = this_series.xField;
          var xValue:Object = horizontal_axis.formatForScreen(LineSeriesItem(item.chartItem).xValue);
        var n:String = this_series.displayName;
        if (n && n != "")
         dt += "<font size='14'><b>" + n + "</b><BR/>" + xValue  + "-" + actionItemID;
         
        
        return dt; 
    }  
    
        [Bindable]
        private var expensesAC:ArrayCollection = new ArrayCollection( [
            { Month: "17", Profit: 2000, Expenses: 1500, Amount: 450 },
            { Month: "18", Profit: 800, Expenses: 200, Amount: 600 },
            { Month: "19", Profit: 1500, Expenses: 500, Amount: 300 },
            { Month: "20", Profit: 1800, Expenses: 1200, Amount: 900 },
            { Month: "21", Profit: 2400, Expenses: 575, Amount: 500 },
             { Month: "22", Profit: 720, Expenses: 575, Amount: 500 },
            { Month: "23", Profit: 1800, Expenses: 1200, Amount: 900 },
            { Month: "24", Profit: 2400, Expenses: 575, Amount: 500 },
             { Month: "25", Profit: 1400, Expenses: 575, Amount: 500 },
             { Month: "26", Profit: 2000, Expenses: 1500, Amount: 450 },
            { Month: "27", Profit: 1000, Expenses: 200, Amount: 600 },
            { Month: "28", Profit: 1500, Expenses: 500, Amount: 300 },
            { Month: "29", Profit: 1800, Expenses: 1200, Amount: 900 },
            { Month: "30", Profit: 2400, Expenses: 575, Amount: 500 },
             { Month: "31", Profit: 3400, Expenses: 575, Amount: 500 },
            { Month: "1", Profit: 1700, Expenses: 1200, Amount: 900 },
            { Month: "2", Profit: 2400, Expenses: 575, Amount: 500 },
             { Month: "3", Profit: 480, Expenses: 575, Amount: 500 },
             { Month: "4", Profit: 2400, Expenses: 575, Amount: 500 },
             { Month: "5", Profit: 1480, Expenses: 575, Amount: 500 },
             { Month: "6", Profit: 570, Expenses: 575, Amount: 500 },
             { Month: "7", Profit: 1970, Expenses: 575, Amount: 500 },
             { Month: "8", Profit: 1600, Expenses: 575, Amount: 500 },
             { Month: "9", Profit: 720, Expenses: 575, Amount: 500 },
             { Month: "10", Profit: 2100, Expenses: 575, Amount: 500 },
             { Month: "11", Profit: 780, Expenses: 575, Amount: 500 },
             { Month: "12", Profit: 1900, Expenses: 575, Amount: 500 },
             { Month: "13", Profit: 1480, Expenses: 575, Amount: 500 },
             { Month: "14", Profit: 1100, Expenses: 575, Amount: 500 },
             { Month: "15", Profit: 2480, Expenses: 575, Amount: 500 },
             { Month: "16", Profit: 700, Expenses: 575, Amount: 500 },            
              { Month: "17", Profit: 1400, Expenses: 575, Amount: 500 } ]);
       
        private function linechart_mouseMove(evt:MouseEvent):void {               
                tit.label = evt.stageY.toString() + " - " + evt.localY+ " - " + this.mouseY;
            }  
            
           
        ]]>     
    </mx:Script>
     <mx:CurrencyFormatter id="currFormatter" precision="0" />  
     <mx:Stroke id = "s1" color="#2E95BF" weight="1"/> 
    <mx:Stroke id = "s2" color="#62C426" weight="1"/> 
    <mx:Stroke id = "s3" color="#FF8C31" weight="1.5"/> 
    <mx:Stroke id="vSolid" weight=".002" color="#333333" alpha=".04" /> 
    <mx:Stroke id="hSolid" weight=".03" color="#ff0000" alpha=".1" /> 
<mx:Stroke id="axisStroke2" color="#6B90DA" weight="2" alpha=".25" caps="square"/>
<mx:SolidColor id="vFill" color="#D6DECE" alpha=".3" /> 
<mx:SolidColor id="hFill" color="#F9E0E0" alpha=".03" />  
<mx:SolidColor id="tFill" color="#ffffff" alpha=".3" /> 
    <mx:Array id="seriesFilterArr" />
    <mx:Panel title="海口-重庆 航线订单趋势图" height="100%" width="100%" fontSize="14" fontWeight="normal">
        <mx:Button width="301" fontWeight="bold" id="tit" fontSize="12" color="#F2530C" fontFamily="Arial" labelPlacement="left"/>
         <comp:CustomLineChart id="linechart" height="100%" width="100%"
            paddingLeft="5" paddingRight="5"  
            showDataTips="true"  showAllDataTips="true"  dataTipFunction="CustomLineChart_dataTipFunction" dataProvider="{expensesAC}"  mouseMove="linechart_mouseMove(event);" creationComplete="init(event);">
             <comp:verticalAxis>  
            <mx:LinearAxis baseAtZero="false" title="Price" labelFunction="linearAxis_labelFunc"   minimum="0"            
                />  
        </comp:verticalAxis>    
            <comp:horizontalAxis>           
                <mx:CategoryAxis categoryField="Month" />
            </comp:horizontalAxis>
            <comp:horizontalAxisRenderer>
               <mx:AxisRenderer canStagger="false" fontSize="10" >                       
                        <mx:axisStroke>{axisStroke2}</mx:axisStroke>
        </mx:AxisRenderer>
           </comp:horizontalAxisRenderer>
           <comp:verticalAxisRenderer>
                  <mx:AxisRenderer >
            <mx:axisStroke>{axisStroke2}</mx:axisStroke>
        </mx:AxisRenderer>
                </comp:verticalAxisRenderer>

                
            <comp:backgroundElements>  
            <mx:GridLines direction="both" horizontalTickAligned="true" verticalTickAligned="true" 
            verticalStroke="{hSolid}" horizontalStroke="{vSolid}" 
            verticalFill="{vFill}" horizontalFill="{hFill}" 
            verticalAlternateFill="{tFill}" horizontalAlternateFill="{tFill}" 
           /> 
        </comp:backgroundElements> 
            <comp:series>
                <mx:LineSeries yField="Profit" form="curve" displayName="票点明细：" itemRenderer="custer.MyLabel" lineStroke="{s3}" />               
               
            </comp:series>
        </comp:CustomLineChart>

    </mx:Panel>

</mx:Application>

关键部分：axisStroke (参见Api)

<mx:AxisRenderer canStagger="false" fontSize="10" >                      
                        <mx:axisStroke>{axisStroke2}</mx:axisStroke>
  </mx:AxisRenderer>