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Flex 3: How to get a DataFridColumn dataField in my ItemRenderer?

I am trying to get to the DataField of a DataGridColumn element in itemRenderer. The following is a data table:

<mx:Script>
    <![CDATA[
        [Bindable] public var weeksOfMoth:ArrayCollection = new ArrayCollection([
                {monday:30, tuesday:31, wednesday:1, thursday:2, friday:3, saturday:4, sunday:5},
                {monday:6, tuesday:7, wednesday:8, thursday:9, friday:10, saturday:11, sunday:12},
                {monday:13, tuesday:14, wednesday:15, thursday:16, friday:17, saturday:18, sunday:19}, 
                {monday:20, tuesday:21, wednesday:22, thursday:23, friday:24, saturday:25, sunday:26}, 
                {monday:27, tuesday:28, wednesday:29, thursday:30, friday:1, saturday:2, sunday:3}
            ]);
    ]]>
</mx:Script>
<mx:DataGrid dataProvider="{weeksOfMoth}" >
    <mx:columns>
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="monday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="tuesday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="wednesday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="thursday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="friday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="saturday" />
        <mx:DataGridColumn itemRenderer="view.DateRenderer" dataField="sunday" />
    </mx:columns>
</mx:DataGrid>

And this is my ItemRenderer:

<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" >
    <mx:Box >

                    <!-- How do I get the dataField here?? -->
        <mx:Label text="{data[dataField]}" /> 
    </mx:Box>
</mx:Canvas>

In the given itemRenderer data function, I get the whole week (this is normal), but itemRenderer does not know which day to use, because dataField is unknown. Does anyone know how to achieve this DataField in itemRenderer?

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6 answers

A comment from www.Flextras.com helped me find a solution. I can really use listData.dataField, but the class must be implemented first IDropInListItemRenderer.

Final ItemRenderer:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" implements="mx.controls.listClasses.IDropInListItemRenderer" >
    <mx:Script>
        <![CDATA[
            import mx.controls.dataGridClasses.DataGridListData;
            import mx.controls.listClasses.BaseListData;


            // Internal variable for the property value.
            private var _listData:DataGridListData;

            // Make the listData property bindable.
            [Bindable("dataChange")]

            // Define the getter method.
            public function get listData():BaseListData
            {
              return _listData;
            }

            // Define the setter method,
            public function set listData(value:BaseListData):void
            {
              _listData = DataGridListData(value);
            }

        ]]>
    </mx:Script>
    <mx:Box width="80%" height="80%" verticalCenter="0" horizontalCenter="0" backgroundColor="#FFFFFF">
        <mx:Label text="{data[_listData.dataField]}" />
    </mx:Box>
</mx:Canvas>
+7

DataGridListData, . dataField.

, :

<mx:Label text="{data[listData.dataField]}" />
+3

IDropInListItemRenderer. :

data[ ( listData as DataGridListData ).dataField ]

listData DataGridListData, BaseListData, . DataGridListData, dataField.

+2

, Spark MX AdvancedDataGrid:

<?xml version="1.0" encoding="utf-8"?>
<s:MXAdvancedDataGridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
                                  xmlns:s="library://ns.adobe.com/flex/spark" 
                                  xmlns:mx="library://ns.adobe.com/flex/mx"
                                  width="100%"
                                  >
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[               
            import mx.controls.dataGridClasses.DataGridListData;

            override public function set data( value:Object):void {             
                var latency:Number = value[ ( this.listData as DataGridListData).dataField] as Number;

                lbl.text = Utils.formatLatency( latency);
                if( latency > 1000000) { // 1s => error
                    lbl.setStyle( "backgroundColor", 0xFF8080);
                } else if( latency > 100000) { // 100ms => warning
                    lbl.setStyle( "backgroundColor", 0xFFFF80);
                } else if( latency > 0){ // low latency
                    lbl.setStyle( "backgroundColor", 0x80FF80);
                }
            }
        ]]>
    </fx:Script>
    <s:Label id="lbl" width="100%" height="100%" verticalAlign="middle" textAlign="right" paddingRight="5"/>
</s:MXAdvancedDataGridItemRenderer>
0

:

  • advancedDataGridListData MXAdvancedDataGridItemRenderers

  • dataGridListData MXDataGridItemRenderer

    .

0

For the average GridItemRenderer, this

column.dataField

So in your case, this should work:

<s:Label text="{data[column.dataField]}" />
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