Exemplo

    <fx:Script>
        <![CDATA[
            public function ativoChange():void
            {
                var dadosTemp:Object = new Object() ;
                dadosTemp = datagrid_menu.selectedItem ;
                var dadosIndex:int = datagrid_menu.selectedIndex;
                dadosTemp.cAtivo = !dadosTemp.cAtivo ;
                //Alert.show('Acesso a tabela ' + dadosTemp.cSigla + ' para ' + dadosTemp.cAtivo);
                array_menu.setItemAt(dadosTemp,datagrid_menu.selectedIndex);
                array_menu.refresh() ;
                array_menu.getItemIndex(dadosIndex);
            }


            public function updateOption(textMessage:String):void
            {
                var dadosTemp:Object = new Object() ;
                dadosTemp = datagrid_menu.selectedItem ;
                var dadosIndex:int = datagrid_menu.selectedIndex;
                dadosTemp[textMessage] = !dadosTemp[textMessage] ;
                //Alert.show('Atualizar a tabela ' + dadosTemp.cSigla + ' o campo ' + textMessage + ' para ' + dadosTemp[textMessage]);
                array_menu.setItemAt(dadosTemp,datagrid_menu.selectedIndex);
                array_menu.refresh() ;
                array_menu.getItemIndex(dadosIndex);
            }
        ]]>
    </fx:Script>


                                <mx:DataGrid id="datagrid_menu" x="115" top="30" bottom="5"
                                             width="582" height="100%" rowHeight="16"
                                             dataProvider="{array_menu}">
                                    <mx:columns>
                                        <mx:DataGridColumn dataField="cNmMenu" headerText="Menu/Diretiva" width="270" editable="false"/>
                                        <mx:DataGridColumn dataField="cAtivo" headerText="Ativo" width="50" textAlign="center" itemRenderer="renderers.CheckBoxRenderer"/>
                                        <mx:DataGridColumn dataField="cIncluir" headerText="Incluir" width="50" textAlign="center" itemRenderer="renderers.CheckBoxOptionRenderer"/>
                                        <mx:DataGridColumn dataField="cAlterar" headerText="Alterar" width="50" textAlign="center" itemRenderer="renderers.CheckBoxOptionRenderer"/>
                                        <mx:DataGridColumn dataField="cExcluir" headerText="Excluir" width="50" textAlign="center" itemRenderer="renderers.CheckBoxOptionRenderer"/>
                                        <mx:DataGridColumn dataField="cExecutar" headerText="Executar" width="50" textAlign="center" itemRenderer="renderers.CheckBoxOptionRenderer"/>
                                        <mx:DataGridColumn dataField="cImprimir" headerText="Imprimir" width="50" textAlign="center" itemRenderer="renderers.CheckBoxOptionRenderer"/>
                                    </mx:columns>
                                </mx:DataGrid>