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https://issues.apache.org/jira/browse/FLEX-34065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean updated FLEX-34065:
---------------------------------
Labels: easyfix easytest (was: )
> 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
> 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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