[FLEX-23684] Label throws a 1069 RTE on item selection when using a custom item renderer in DropDownList

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: Adobe Flex SDK 4.0 (Release)
• Component/s: Spark: DropDownList
• Environment: Affected OS(s): Mac; Affected OS(s): Mac OS 10.6; Browser: Safari; Language Found: French
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 05/Apr/10 06:16
• Updated: 12/Apr/10 09:38
• Resolved: 12/Apr/10 09:38

Description

Steps to reproduce:
1. Run the following code:
<?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"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
applicationComplete="applicationCompleteHandler(event)">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;

protected function applicationCompleteHandler(event:FlexEvent):void
{
testCombo.dataProvider = new ArrayCollection([

{label:"Short item", someProperty:"foo"}

,

{label:"This is a much longer item ! It would throw a RTE", someProperty:"bar"}

,

{label:"This is another sample text", someProperty:"foobar"}

]);
testCombo2.dataProvider = new ArrayCollection([

{label:"Short item", someProperty:"foo"}

,

{label:"This is a much longer item ! It would throw a RTE", someProperty:"bar"}

,

{label:"This is another sample text", someProperty:"foobar"}

]);
}

]]
>
</fx:Script>

<s:DropDownList id="testCombo" labelField="label" horizontalCenter="0" verticalCenter="0" width="300">
<s:itemRenderer>
<fx:Component>
<s:ItemRenderer>
<s:HGroup verticalAlign="middle" width="100%">
<s:Label text="

{data.label}"/>
<s:Label text="{data.someProperty}"/>
</s:HGroup>
</s:ItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:DropDownList>

<s:ComboBox id="testCombo2" labelField="label" horizontalCenter="0" verticalCenter="50" width="300">
<s:itemRenderer>
<fx:Component>
<s:ItemRenderer>
<s:HGroup verticalAlign="middle" width="100%">
<s:Label text="{data.label}

"/>
<s:Label text="

{data.someProperty}

"/>
</s:HGroup>
</s:ItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:ComboBox>
</s:Application>

2. In the DropDownList, select the 2nd or 3rd item

Actual Results:
The spark Label class throws a 1069 error (translated from French):
ReferenceError: Error #1069: Property -1 cannot be found on _AS3_.vec.Vector.<flash.display::DisplayObject> and there is no default value.
at spark.components::Label/truncateText()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\Label.as:1246]
at spark.components::Label/http://www.adobe.com/2006/flex/mx/internal::composeTextLines()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\Label.as:485]
at spark.components.supportClasses::TextBase/measure()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\supportClasses\TextBase.as:533]
at mx.core::UIComponent/measureSizes()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8042]
at mx.core::UIComponent/validateSize()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:7966]
at mx.managers::LayoutManager/validateSize()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:617]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:733]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]

Expected Results:

• No RTE
• The item is actually selected

Workaround (if any):
Not found. Tried the following things, none of them work:

• replace the inline renderer with an external file renderer
• use plain strings as items in the ArrayCollection
• set the dataprovider from MXML rather than from code

More info:

• As you can see, selecting the first item in the list is working correctly, it seems that the problem is related to the lenght of the item renderer
• The ComboBox is working perfectly with the same configuration
• I'm using flash player debugger version 10.1 beta
• JDK is Apple's 1.6 latest release