Make Chart From Drag Drop
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<!-- charts/MakeChartFromDragDrop.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.PieChart;
import mx.charts.series.PieSeries;
import mx.charts.events.ChartItemEvent;
import mx.events.DragEvent;
import mx.controls.List;
import mx.managers.DragManager;
import mx.core.DragSource;
import mx.charts.Legend;
[Bindable]
public var newDataProviderAC:ArrayCollection;
[Bindable]
private var expensesAC:ArrayCollection;
import mx.collections.ArrayCollection;
[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}
]);
private function initApp():void {
setupPieChart();
}
private function resultHandler():void {
expensesAC = expenses;
}
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 = "multiple";
newChart.dropEnabled= true;
newChart.dragEnabled= false;
newChart.height = 350;
newChart.width = 350;
newChart.addEventListener("dragEnter", doDragEnter);
newChart.addEventListener("dragDrop", doDragDrop);
newChart.dataProvider = newDataProviderAC;
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;
p2.addElement(newChart);
p2.addElement(newLegend);
}
private function doDragEnter(event:DragEvent):void {
// Get a reference to the target chart.
var dragTarget:ChartBase = ChartBase(event.currentTarget);
// Register the target chart with the DragManager.
DragManager.acceptDragDrop(dragTarget);
}
private function doDragDrop(event:DragEvent):void {
// Get a reference to the target chart.
var dropTarget:ChartBase=ChartBase(event.currentTarget);
// Get the dragged items from the drag initiator. When getting
// items from chart controls, you must use the 'chartitems'
// format.
var items:Array = event.dragSource.dataForFormat("chartitems") as Array;
// Trace status messages.
trace("length: " + String(items.length));
trace("format: " + String(event.dragSource.formats[0]));
// Add each item to the drop target's data provider.
for(var i:uint=0; i < items.length; i++){
// If the target data provider already contains the
// item, then do nothing.
if (dropTarget.dataProvider.contains(items[i].item)) {
// If the target data provider does NOT already
// contain the item, then add it.
} else {
dropTarget.dataProvider.addItem(items[i].item);
}
}
}
</fx:Script>
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:Panel id="p1" title="Source Chart" height="250" width="400">
<s:layout>
<s:VerticalLayout />
</s:layout>
<mx:ColumnChart id="myColumnChart" height="207" width="350"
showDataTips="true" dataProvider="{expenses}"
selectionMode="multiple" dragEnabled="true" dropEnabled="false">
<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>
<!-- This will be the parent of the soon-to-be created chart. -->
<s:Panel id="p2" title="Target Chart" height="400" width="400">
<s:layout>
<s:VerticalLayout />
</s:layout>
</s:Panel>
</s:Application>
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