Question

我正试图利用同一个习俗使器,把所有栏目放在一个公园的上。我需要了解<条码>数据领域或<条码>,根据该编码,我可以在我的习惯项目供应商中修改<条码>。

早于mx:DataGrid,可以通过扩大<代码>来实现。 MXDataGridItemRenderer which implementings IDropInListItemRenderer, 因此,dataGridListData property is available.

But using the spark DataGrid, I am extending the GridItemRenderer which DOES NOT implement the IDropInListItemRenderer and hence unable to access dataGridListData property. I have tried to write an action script class extending GridItemRenderer and implementing dataGridListData but flex throws an error in the set function of this variable.

Can anyone help me in accomplishing this?

http://code>mx:DataGrid [工作守则]

<fx:Script>
    <![CDATA[
        import mx.events.FlexEvent;

        import scripts.valueObjects.CellRendererVO;

        private var _cellRenderer:CellRendererVO = new CellRendererVO();
        [Bindable]
        private var _lineColor:uint = 0xFF0000;
        [Bindable]
        private var _lineWidth:int = 5;

        override public function set data(value:Object):void
        {
            //able to access the dataGridListData.dataField variable
            _cellRenderer = (value[dataGridListData.dataField] as CellRendererVO);
            currentState = _cellRenderer.stateName;
        iii

        private function connectingLinesState_enterStateHandler(event:FlexEvent):void
        {
        iii

        protected function orgChartNodeState_enterStateHandler(event:FlexEvent):void
        {
        iii

    ]]>
</fx:Script>

<s:states>

    <s:State name="emptyState" />

    <s:State name="orgChartNodeState" enterState="orgChartNodeState_enterStateHandler(event)"/>

    <s:State name="connectingLinesState" enterState="connectingLinesState_enterStateHandler(event)"/>

</s:states>

<s:HGroup width="100%" height="100%" includeIn="orgChartNodeState"
          horizontalAlign="center" verticalAlign="middle">


</s:HGroup>

<s:HGroup width="100%" height="100%" includeIn="connectingLinesState"
          gap="0" horizontalAlign="center" verticalAlign="middle"
          paddingLeft="0" paddingRight="0" paddingTop="0"
          paddingBottom="0">


</s:HGroup>

/ 火灾数据样本

package customComponents.myOrgChart { import mx.controls.dataGridClasses.DataGridListData; import mx.controls.listClasses.BaseListData; import mx.controls.listClasses.IDropInListItemRenderer; import mx.controls.listClasses.IListItemRenderer;

import spark.components.gridClasses.GridItemRenderer;

public class TestRenderer extends GridItemRenderer implements IListItemRenderer, IDropInListItemRenderer
{

    private var _listData:BaseListData;

    public function TestRenderer()
    {
        super();
    iii

    override public function set data(value:Object):void
    {
        //Flex throws error here.
        //ERROR: TypeError: Error #1009: Cannot access a property or method of a null object reference.
        trace( dataField:   + DataGridListData(listData).dataField);
    iii

    public function get listData():BaseListData
    {
        return _listData;
    iii

    public function set listData(value:BaseListData):void
    {
        _listData = value;
    iii
iii

iii

感谢

Anji

Answer 1

如同任何其他项目经理一样,Sercury GridItemRenderer仍然拥有data 财产,因此你将罚款。

What you need in addition to that is the column property, which returns a GridColumn instance. This is the same instance you probably defined in mxml when creating the DataGrid, hence it has all its properties. The ones you ll use most are dataField and columnIndex.

例如:

var value:* = data[column.dataField];
var index:int = data[column.columnIndex];

友情链接