<mx:DataGrid x="10" y="325" width="978" height="266" tabIndex="680" id="dg" keyDown="onKeydown(event);">
	<mx:columns>
		<mx:DataGridColumn headerText="名前" dataField="name" width="900"/>
		<mx:DataGridColumn headerText="チェック" dataField="chk" editorDataField="selected">
			<mx:itemRenderer>
				<mx:Component>
					<comp:CheckBoxRenderer width="14"/>
				</mx:Component>
			</mx:itemRenderer>

		</mx:DataGridColumn>
	</mx:columns>
</mx:DataGrid>


public function xxxfunc():void
{
	dg.dataProvider = <Array>;
}


public function onKeydown(e:KeyboardEvent):void
{
	dgOnKeydown(e);
}


public function dgOnKeydown(e:KeyboardEvent):void
{
	switch (e.keyCode)
	{
		case KeyboardUtil.KeyCode_Space:
			if (e.currentTarget.selectedIndex > -1)
			{
				e.currentTarget.dataProvider[e.currentTarget.selectedIndex].chk = !(e.currentTarget.dataProvider[e.currentTarget.selectedIndex].chk);
			}
			break;
	}
}

e.currentTarget.dataProvider[e.currentTarget.selectedIndex].chk = !(e.currentTarget.dataProvider[e.currentTarget.selectedIndex].chk);
e.currentTarget.dataProvider = e.currentTarget.dataProvider;