flex4 ColumnChart外包裹NavigatorContent进行TabNavigator分页出错，柱子移位

之前单页面的ColumnChart显示图标正常。 后来用TabNavigator进行分2页，每个页面用NavigatorContent， 在NavigatorContent中 再添加ColumnChart 出现了柱子移位的现象。

在ColumnChart 外包裹一层BorderContainer ，问题解决。~

<mx:TabNavigator id="tabnavigator1" width="100%" height="100%" >
<s:NavigatorContent id="nc_Id_1" label="调峰报告"
icon="@Embed('assets/icon/list/48.png')" width="100%" height="100%">
<ElectroLoadShifting:Usefuldays width="100%" height="100%" id="usefuldays_id"/>
</s:NavigatorContent>

<s:NavigatorContent id="nc_Id_2" label="调峰执行"
icon="@Embed('assets/icon/list/48.png')" width="100%" height="100%" >

<s:HGroup width="100%" height="100%" paddingLeft="1" paddingRight="10"
verticalAlign="middle" includeIn="loadingState">
<s:BorderContainer width="100%" height="100%" borderVisible="false" >
<s:HGroup width="100%" height="100%" >
<s:Label id="unit_id" width="18" height="100%"
text="{'用电量︵'+_model.loadingShitServerModel.unit+'︶'}"
verticalAlign="middle"/>
<s:VGroup width="100%" height="100%">
<s:Label text="近30天用电量"/>
<mx:ColumnChart id="column" height="100%" color="0x323232" width="100%"
showDataTips="true" dataProvider="{_model.loadingShitServerModel.datas}"
dataTipRenderer="common.skin.ColumnChart_DatatipSkin" creationComplete="init()"
>
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="time"/>
</mx:horizontalAxis>

<mx:series>
<mx:ColumnSeries xField="time" yField="data" displayName="日用电量" id="columSeries_id" />
</mx:series>
</mx:ColumnChart>
</s:VGroup>

</s:HGroup>
</s:BorderContainer>

</s:HGroup>

<s:HGroup width="100%" height="100%" includeIn="coarseTurningState">
<ElectroLoadShifting:CoarseTurning id="coarseTurning_id" width="100%" height="100%"/>
</s:HGroup>
<s:HGroup width="100%" height="100%" includeIn="fineTurningState">
<ElectroLoadShifting:FineTurning id="fineTurning_id" width="100%" height="100%"/>
</s:HGroup>
<s:HGroup width="100%" height="100%" includeIn="powerSchemeState">
<ElectroLoadShifting:PowerScheme id="powerScheme_id" width="100%" height="100%"/>
</s:HGroup>

</s:NavigatorContent>

</mx:TabNavigator>