gistfile1.txt

<mx:AdvancedDataGridColumn dataField="active"       headerText="Active"       editable="false">
        <mx:itemRenderer>
          <mx:Component>
            <mx:Canvas width="100%" height="100%">
              <mx:CheckBox selected="{data.active}" horizontalCenter="0" click="alertData(event);">
                <mx:Script>
                  <![CDATA[
                    import mx.controls.Alert;
                    import flash.external.ExternalInterface;
                    import mx.events.FlexEvent;
                    import org.restfulx.Rx;
                    import org.restfulx.models.*;
                    import mx.events.AdvancedDataGridEvent;

                    private function alertData(event):void{
                      Alert.show(event.currentTarget);
                      //ExternalInterface.call("console.log",event.currentTarget);
                    }
                  ]]>
                </mx:Script>
              </mx:CheckBox>
            </mx:Canvas>
          </mx:Component>
        </mx:itemRenderer>
      </mx:AdvancedDataGridColumn>

  <mx:AdvancedDataGridColumn dataField="active"       headerText="Active"       editable="false" itemRenderer="mx.controls.CheckBox" >
  </mx:AdvancedDataGridColumn>

?

Quise decir:

<mx:AdvancedDataGridColumn dataField="active" headerText="Active" editable="true" itemRenderer="mx.controls.CheckBox" >
</mx:AdvancedDataGridColumn>

(editable=true)

 <mx:AdvancedDataGridColumn dataField="active" headerText="Active" itemEditor="mx.controls.CheckBox" editorDataField="selected">
 </mx:AdvancedDataGridColumn>