Adding Tooltip to Truncated Datagrid in Flex

Simply set the itemRenderer to mx.controls.Label, as a Label already has truncate and tooltip functionality. And the tooltip will only show when text got truncated. <mx:DataGridColumn paddingLeft="5" headerRenderer="renderers.ToolTipGridHeaderRenderer" id="nameCol" itemRenderer="mx.controls.Label" minWidth="110" headerText="Page URL" dataField="name" sortable="false"/>