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From "Justin Mclean (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLEX-34065) AdvancedDataGrid throws RTE #1009 when groupedColumns is set to null
Date Mon, 03 Feb 2014 00:16:09 GMT

     [ https://issues.apache.org/jira/browse/FLEX-34065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Justin Mclean reassigned FLEX-34065:
------------------------------------

    Assignee: Justin Mclean

> AdvancedDataGrid throws RTE #1009 when groupedColumns is set to null
> --------------------------------------------------------------------
>
>                 Key: FLEX-34065
>                 URL: https://issues.apache.org/jira/browse/FLEX-34065
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Advanced Data Grid
>    Affects Versions: Apache Flex 4.11.0
>            Reporter: Mihai Chira
>            Assignee: Justin Mclean
>              Labels: easyfix, easytest
>             Fix For: Apache Flex 4.12.0
>
>
> Steps to reproduce: when run, the following application throws "Error #1009: Cannot access
a property or method of a null object reference. at mx.controls::AdvancedDataGridBaseEx/commitProperties()..."
> <?xml version="1.0" encoding="utf-8"?>
> <s:WindowedApplication xmlns:mx="library://ns.adobe.com/flex/mx"
> 					xmlns:fx="http://ns.adobe.com/mxml/2009" 
> 					xmlns:s="library://ns.adobe.com/flex/spark">
> 	<mx:AdvancedDataGrid>
> 		<mx:groupedColumns/>
> 	</mx:AdvancedDataGrid>
> </s:WindowedApplication>
> Notes:
> * in our application this is happening because OLAPDataGrid.commitProperties() sets "groupedColumns
= []" when there are no column axes in the olap data.
> * because AdvancedDataGrid relies on visibleHeaderInfos being null in some cases (see
AdvancedDataGrid.drawHeaderHorizontalSeparators()), it seems that it's the assumption made
by AdvancedDataGridBaseEx.commitProperties() - that visibleHeaderInfos cannot be null - which
needs to be changed. So the monkey patch we wrote until we have a fix in the framework replaces
> if (horizontalScrollPosition > visibleHeaderInfos.length)
>                 horizontalScrollPosition = visibleHeaderInfos.length - 1;
> ...with
> var noVisibleColumns:int = visibleHeaderInfos ? visibleHeaderInfos.length : 0;
>             if (horizontalScrollPosition > noVisibleColumns)
>                 horizontalScrollPosition = noVisibleColumns == 0 ? noVisibleColumns :
noVisibleColumns - 1;



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