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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- itemRenderers\events\EndEditEventFormatter.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.controls.TextInput;
import mx.events.DataGridEvent;
import mx.events.DataGridEventReason;
import mx.formatters.NumberFormatter;
import mx.collections.ArrayCollection;
[Bindable]
private var initDG:ArrayCollection = new ArrayCollection([
{Artist:'Pavement', Album:'Slanted and Enchanted',Price:11.99},
{Artist:'Pavement', Album:'Brighten the Corners', Price:11.99 }
]);
// Define the number formatter.
private var myFormatter:NumberFormatter=new NumberFormatter();
// Define the eventlistner for the itemEditEnd event.
public function formatData(event:DataGridEvent):void {
// Check the reason for the event.
if (event.reason == DataGridEventReason.CANCELLED){
// Do not update cell.
return;
}
// Get the new data value from the editor.
var newData:String= TextInput(event.currentTarget.itemEditorInstance).text;
// Determine if the new value is an empty String.
if(newData == "") {
// Prevent the user from removing focus,
// and leave the cell editor open.
event.preventDefault();
// Write a message to the errorString property.
// This message appears when the user
// mouses over the editor.
TextInput(myGrid.itemEditorInstance).errorString="Enter a valid string.";
return;
}
// For the Price column, return a value
// with a precision of 2.
if(event.dataField == "Price") {
myFormatter.precision=2;
TextInput(myGrid.itemEditorInstance).text=myFormatter.format(newData);
}
}
</fx:Script>
<mx:DataGrid id="myGrid" dataProvider="{initDG}" editable="true"
itemEditEnd="formatData(event);">
<mx:columns>
<mx:DataGridColumn dataField="Artist" />
<mx:DataGridColumn dataField="Album" />
<mx:DataGridColumn dataField="Price" />
</mx:columns>
</mx:DataGrid>
</s:Application>
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