[FLEX-28333] First item of a DataGroup isn't shown when it's null

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: DataGroup
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 24/Aug/11 17:21
• Updated: 25/Aug/11 11:37
• Resolved: 24/Aug/11 17:56

Description

Steps to reproduce:
1. Compile and run this application:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark">

<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
]]
>
</fx:Script>

<s:controlBarContent>
<s:Button label="click" click="group1.dataProvider = new ArrayCollection([null, 'string', null, 3.1415, null])" />
</s:controlBarContent>

<s:DataGroup id="group1" width="300" height="274" >
<s:layout>
<s:VerticalLayout useVirtualLayout="true" />
</s:layout>
<s:itemRenderer>
<fx:Component>
<s:ItemRenderer creationComplete="init()" autoDrawBackground="false">
<fx:Script>
<![CDATA[
public function init():void {
// Ensure that the null value comes through to the item renderer
if (data == null)

{ theColor.color = 0xFF0000; data = 'null'; }

}
]]
>
</fx:Script>
<s:states>
<s:State name="normal"/>
<s:State name="hovered"/>
<s:State name="selected"/>
</s:states>

<s:Rect width="300" height="50">
<s:fill>
<s:SolidColor id="theColor" color="0x00FFFF" alpha="0.2" alpha.hovered="0.2" alpha.selected="0.8" />
</s:fill>
</s:Rect>

<s:Label text="

{data}

" verticalCenter="0" left="2" right="2" top="2" bottom="2" />

</s:ItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:DataGroup>

</s:Application>

2. Click "click" button
3.

Actual Results:

string
null
3.1415
null

Expected Results:

null
string
null
3.1415
null

Workaround (if any):