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https://issues.apache.org/jira/browse/FLEX-33990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean reassigned FLEX-33990:
------------------------------------
Assignee: Justin Mclean
> RTE in AdvancedDataGridBase drawItem
> ------------------------------------
>
> Key: FLEX-33990
> URL: https://issues.apache.org/jira/browse/FLEX-33990
> Project: Apache Flex
> Issue Type: Bug
> Components: ADG:Display
> Affects Versions: Apache Flex 4.11.0
> Environment: Windows 7, Flashbuilder 4.7 (probably irrelevant)
> Reporter: Mark Saunders
> Assignee: Justin Mclean
> Priority: Minor
> Labels: easyfix, patch
> Fix For: Adobe Flex SDK Next
>
>
> The method drawItem() (line 897 of AdvancedDataGridBase) was modified in
> 4.11. Line 916 was added: r.validateDisplayList();
> The issue is that r is null. In the for loop, n is the length of visible
> columns, while r is derived from listitems[row][i]. The listItems inner
> array [i] only contains custom itemrenderers and is therefore a subset of the
> optimumColumns (visible columns). I think an if(r) check will fix the issue.
> This looks like a timing issue depending on when drawItems() is called. In
> my app, about 50% of the time, I get the RTE when right after the
> advancedDataGrid is initialized. See stack below.
> var n:int = optimumColumns.length;
> for (var i:int = 0; i < n; i++)
> {
> var r:IListItemRenderer = listItems[rowIndex][i];
> r.validateDisplayList();
> updateDisplayOfItemRenderer(r);
> }
> AT THIS POINT, listItems[0] (or any row for that matter) has 4 elements
> representing my custom item renderers only (lengh = 4) while n:int =
> optimumColumns.length = 16
> STACK:
> mx.controls.advancedDataGridClasses::AdvancedDataGridBase/drawItem
> mx.controls.listClasses::AdvancedListBase/http://www.adobe.com/2006/flex/mx/internal::clearHighlight
>
> mx.controls.advancedDataGridClasses::AdvancedDataGridBase/http://www.adobe.com/2006/flex/mx/internal::clearHighlight
>
> mx.controls::AdvancedDataGrid/http://www.adobe.com/2006/flex/mx/internal::clearHighlight
>
> mx.controls.listClasses::AdvancedListBase/mouseOutHandler
> mx.controls::AdvancedDataGridBaseEx/mouseOutHandler
> mx.controls::AdvancedDataGrid/mouseOutHandler
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