Specify the NumericStepper control as the item editor for a column of the DataGrid control
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<!-- itemRenderers\dropin\DropInNumStepper.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Script>
import mx.collections.ArrayCollection;
[Bindable]
private var myDP:ArrayCollection = new ArrayCollection([
{label1:"Order #2314", quant:3, Sent:true},
{label1:"Order #2315", quant:3, Sent:false}
]);
</fx:Script>
<mx:DataGrid id="myDG" dataProvider="{myDP}"
variableRowHeight="true" editable="true">
<mx:columns>
<mx:DataGridColumn dataField="label1" headerText="Order #" />
<mx:DataGridColumn dataField="quant" headerText="Qty"
itemEditor="mx.controls.NumericStepper" editorDataField="value" />
</mx:columns>
</mx:DataGrid>
</s:Application>
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