Mega Code Archive
Bind data provider to a local variable
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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- charts/ChangeDataProvider.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"
height="600">
<fx:Script>
import mx.collections.ArrayCollection;
[Bindable]
public var expenses:ArrayCollection = new ArrayCollection([
{Month:"Jan", Profit:2000, Expenses:1500, Amount:450},
{Month:"Feb", Profit:1000, Expenses:200, Amount:600},
{Month:"Mar", Profit:1500, Expenses:500, Amount:300}
]);
[Bindable]
public var expenses2:ArrayCollection = new ArrayCollection([
{Month:"Jan", Profit:2400, Expenses:1509, Amount:950},
{Month:"Feb", Profit:3000, Expenses:2200, Amount:400},
{Month:"Mar", Profit:3500, Expenses:1200, Amount:200}
]);
[Bindable]
public var dp:ArrayCollection = expenses;
public function changeDataProvider():void {
if (dp==expenses) {
dp = expenses2;
} else {
dp = expenses;
}
}
</fx:Script>
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:Panel title="Line Chart">
<s:layout>
<s:VerticalLayout />
</s:layout>
<mx:LineChart id="myChart" dataProvider="{dp}"
showDataTips="true">
<mx:horizontalAxis>
<mx:CategoryAxis dataProvider="{dp}" categoryField="Month" />
</mx:horizontalAxis>
<mx:series>
<mx:LineSeries yField="Profit" displayName="Profit" />
<mx:LineSeries yField="Expenses" displayName="Expenses" />
<mx:LineSeries yField="Amount" displayName="Amount" />
</mx:series>
</mx:LineChart>
<mx:Legend dataProvider="{myChart}" />
</s:Panel>
<s:Button id="b1" label="Change Data Provider" click="changeDataProvider()" />
</s:Application>
]]>