Display dataTip on a datagrid if text is truncated.

Many people are having problem to display dataTip on a Datagrid only if the text is truncated. The best solution I found to use Label as an itemRenderer. we also need to set truncateToFit property of an Label to true.

Following example explains how to use itemRenderer in a dataGrid, it also explains how to show datatip only if the text is truncated.

we could have one extended Label class LabelRenderer
  import mx.controls.Label;
  public class LabelRenderer extends Label
    public function LabelRenderer()


<?xml version=”1.0″ encoding=”utf-8″?>



<mx:VBox xmlns:mx=”http://www.adobe.com/2006/mxml” width=”400” height=”300><mx:XML id=”itemsXML>
<item name=”Item 1″ description=”dummy description for Item 1″ />
<item name=”Item 2″ description=”dummy description for Item 2″ />
<item name=”Item 3″ description=”dummy description for Item 3″ />
<item name=”Item 4″ description=”dummy description for Item 4″ />
<mx:DataGrid dataProvider=”{itemsXML.item}><mx:columns>
<mx:DataGridColumn dataField=”@name” headerText=”Name/>
<mx:DataGridColumn dataField=”@description” headerText=”Description” itemRenderer=”com.subrat.LabelRenderer/>





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