Mega Code Archive
YValue of the ColumnSeriesItem represents the percentage a series takes up in a 100% chart
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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- charts/HitDataCastingWithPercent.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="init()">
<mx:Script>
import mx.collections.ArrayCollection;
import mx.charts.HitData;
import mx.charts.series.ColumnSeries;
import mx.charts.series.items.ColumnSeriesItem;
[Bindable]
public var dataSet:ArrayCollection = new ArrayCollection([
{Month:"Jan", Income:1500, Profit:90},
{Month:"Feb", Income:1200, Profit:100},
{Month:"Mar", Income:750, Profit:150}
]);
public var b:Boolean = true;
public function myDataTipFunction(e:HitData):String {
var s:String;
s = "<B>" + ColumnSeries(e.element).displayName + "</B>\n";
s += "<I>Income:</I> <FONT COLOR='#339966'>$" + e.item.Income + "</FONT>\n";
s += "<I>Expenses:</I> <FONT COLOR='#FF0000'>$" + (e.item.Income - e.item.Profit) + "</FONT>\n";
s += "------------------------\n";
s += "<I>Profit:</I> $" + e.item.Profit + "\n";
// The value of the Income will always be 100%, so exclude adding that to the DataTip. Only
// add percent when the user gets the Profit DataTip.
var percentValue:Number = Number(ColumnSeriesItem(e.chartItem).yValue);
if (percentValue < 100) {
s += "Profit was equal to about <B>" +
Math.round(percentValue) + "</B>% of the income.\n";
}
return s;
//return e.item.Month + ":<B>$" + e.item.Profit + "</B>";
}
</mx:Script>
<mx:Panel title="Accessing ChartItems from HitData Objects">
<mx:ColumnChart id="myChart" dataProvider="{dataSet}" type="100%"
dataTipFunction="myDataTipFunction" showDataTips="true">
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="Month" />
</mx:horizontalAxis>
<mx:series>
<mx:ColumnSeries yField="Profit" displayName="Profit '06" />
<mx:ColumnSeries yField="Income" displayName="Income '06" />
</mx:series>
</mx:ColumnChart>
<mx:Legend dataProvider="{myChart}" />
</mx:Panel>
</mx:Application>
]]>