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Posted to dev@flex.apache.org by "Justin Mclean (JIRA)" <ji...@apache.org> on 2013/04/24 00:11:15 UTC
[jira] [Updated] (FLEX-28424) ComboBox with requestedRowCount set
has RTE when text input is cleared
[ https://issues.apache.org/jira/browse/FLEX-28424?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Justin Mclean updated FLEX-28424:
---------------------------------
Labels: easyfix easytest (was: )
> ComboBox with requestedRowCount set has RTE when text input is cleared
> ----------------------------------------------------------------------
>
> Key: FLEX-28424
> URL: https://issues.apache.org/jira/browse/FLEX-28424
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: ComboBox
> Affects Versions: Adobe Flex SDK 4.5.1 (Release)
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Browser: Firefox 3.x
> Language Found: English
> Reporter: Adobe JIRA
> Labels: easyfix, easytest
>
> Steps to reproduce:
> 1. Create a project with 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">
> <s:ComboBox>
> <s:layout>
> <s:VerticalLayout requestedRowCount="1"/>
> </s:layout>
> <s:dataProvider>
> <s:ArrayCollection>
> <fx:int>25</fx:int>
> </s:ArrayCollection>
> </s:dataProvider>
> </s:ComboBox>
>
> </s:Application>
> 2. Run the application and cut or select/delete the text in the text input portion of the ComboBox.
>
> Actual Results:
> TypeError: Error #1009: Cannot access a property or method of a null object reference.
> at spark.components.supportClasses::DropDownListBase/http://www.adobe.com/2006/flex/mx/internal::positionIndexInView()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\supportClasses\DropDownListBase.as:659]
> at spark.components.supportClasses::DropDownListBase/http://www.adobe.com/2006/flex/mx/internal::changeHighlightedSelection()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\supportClasses\DropDownListBase.as:638]
> at spark.components::ComboBox/textInput_changeHandler()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\ComboBox.as:1045]
> ...
>
> Expected Results:
> No error.
>
> Workaround (if any):
> Do not use requestedRowCount.
>
> Specifically the issue is that ComboBox overrides some things, but in this particular instance, it uses the super (DropDownListBase) which tries to use a null dataGroup. The issue is in ComboBox#textInput_changeHandler:
> // Close the dropDown if we press delete or cut the selected text
> if (operation is DeleteTextOperation || operation is CutOperation)
> {
> super.changeHighlightedSelection(CUSTOM_SELECTED_ITEM);
> }
> This was previously mentioned by someone else in the forums:
> http://forums.adobe.com/message/3272412#3272412
> Not sure if that ever made it to a ticket though.
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