How to remove the use of virtual layout on a Spark DataGrid

Question

Hi!
I have the following spark data grid:
<s:DataGrid id="listagem"
            x="6"
            y="6"
            width="640"
            height="400"
            skinClass="skins.dataGrid.ConsusListagemDataGridSkin"
            dataProvider="{imoveis}">
     <s:columns>
          <s:ArrayList>
               <s:GridColumn headerText="IMÓVEL"
                             itemRenderer="components.itemRenderers.ListagemImovelItemRenderer"/>
               <s:GridColumn headerText="LOCALIZAÇÃO"
                             dataField="comuna"
                             width="130"/>
               <s:GridColumn headerText="PREÇO"
                             labelFunction="{function (item:Object, column:GridColumn):String {return '$ '+item.preco;}}"
                             width="90"/>
               <s:GridColumn headerText="COMPARAR"
                             width="70">
                    <s:itemRenderer>
                         <fx:Component>
                              <s:GridItemRenderer>
                                   <s:CheckBox verticalCenter="0" horizontalCenter="0"/>
                              </s:GridItemRenderer>
                         </fx:Component>
                    </s:itemRenderer>
               </s:GridColumn>
          </s:ArrayList>
     </s:columns>
</s:DataGrid>
My problem is that, if I select the check box on one item having a considerable amount of rows, then if I scrool down another item will appear checked even if I never clicked it.
This is due to the use of virtual layout by the spark data grid, but I just can't find where to tell the data grid to not use virtual layout.
Can anyone help me, please?
Thanks,
Jorge

Answer 1

Hi kevinklin!
Thanks for your answer.
I tried to do as you told but I never get the prepare method to be executed.
I just added this to the GridItemRenderer:
public override function prepare(willBeRecycled:Boolean):void
     Alert.show('BLA OUT');
     if (willBeRecycled)
          Alert.show('BLA IN');
but I never get to see any alert box.
Best regards,
Jorge