Mega Code Archive
Create a PieChart control from the selected columns in the ColumnChart control
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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- charts/MakeChartFromSelection.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
creationComplete="initApp();" height="600">
<fx:Declarations>
<mx:SeriesInterpolate id="interpol" duration="1000"
elementOffset="0" minimumElementDuration="200" />
</fx:Declarations>
<fx:Script>
import mx.collections.ArrayCollection;
import mx.charts.chartClasses.ChartBase;
import mx.charts.ChartItem;
import mx.charts.series.items.ColumnSeriesItem;
import mx.charts.PieChart;
import mx.charts.series.PieSeries;
import mx.charts.events.ChartItemEvent;
import mx.charts.Legend;
[Bindable]
public var expenses:ArrayCollection = new ArrayCollection([
{Month:"Jan", Profit:20, Expenses:15, Amount:145},
{Month:"Feb", Profit:1, Expenses:2, Amount:60},
{Month:"Mar", Profit:15, Expenses:5, Amount:3}
]);
[Bindable]
public var expensesAC:ArrayCollection;
[Bindable]
public var newDataProviderAC:ArrayCollection;
private function resultHandler():void {
expensesAC = expenses;
}
private function initApp():void {
myColumnChart.addEventListener(ChartItemEvent.CHANGE, createNewChart);
setupPieChart();
}
private function getNewDataProvider():ArrayCollection {
newDataProviderAC = new ArrayCollection();
for (var i:int=0; i<series1.selectedItems.length; i++) {
var o:Object = new Object();
o.Month = expensesAC.getItemAt(series1.selectedIndices[i]).month;
o.Expenses = expensesAC.getItemAt(series1.selectedIndices[i]).expenses;
newDataProviderAC.addItem(o);
}
return newDataProviderAC;
}
private var newChart:PieChart;
private var newSeries:PieSeries;
[Bindable]
private var explodedPiece:Array;
private function explodePiece(e:Event):void {
explodedPiece = new Array();
explodedPiece[newSeries.selectedIndex] = .2;
newSeries.perWedgeExplodeRadius = explodedPiece;
}
private function setupPieChart():void {
newChart = new PieChart();
newChart.showDataTips = true;
newChart.selectionMode = "single";
newSeries = new PieSeries();
newSeries.field = "Expenses";
newSeries.nameField = "Month";
newSeries.setStyle("labelPosition", "callout");
newSeries.setStyle("showDataEffect", "interpol");
var newSeriesArray:Array = new Array();
newSeriesArray.push(newSeries);
newChart.series = newSeriesArray;
newChart.addEventListener(ChartItemEvent.CHANGE, explodePiece);
// Create a legend for the new chart.
var newLegend:Legend = new Legend();
newLegend.dataProvider = newChart;
p1.addElement(newChart);
p1.addElement(newLegend);
}
private function createNewChart(e:Event):void {
newChart.dataProvider = getNewDataProvider();
}
</fx:Script>
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:Panel id="p1" title="Column Chart">
<s:layout>
<s:VerticalLayout />
</s:layout>
<mx:ColumnChart id="myColumnChart" height="207" width="350"
showDataTips="true" dataProvider="{expenses}"
selectionMode="multiple">
<mx:series>
<mx:ColumnSeries id="series1" yField="Expenses"
displayName="Expenses" selectable="true" />
</mx:series>
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="Month" />
</mx:horizontalAxis>
</mx:ColumnChart>
</s:Panel>
</s:Application>
]]>