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https://issues.apache.org/jira/browse/FLEX-33651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732138#comment-13732138
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Justin Mclean commented on FLEX-33651:
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Can reproduce in 4.9 and 4.10 but it may be expected behaviour rather than a
bug.
If you look at the setFocusInItemRenderer method in DataGridEditor.as, you'll
see that it only sets the focus if the item renderer contains a item than can
be given focus. In the supplied example some item editors contain no items
(when checkbox is hidden) so nothing can be given focus and focus reverts to
the datagrid.
> If editable renderer is not enabled, TAB key movement does not work correctly.
> ------------------------------------------------------------------------------
>
> Key: FLEX-33651
> URL: https://issues.apache.org/jira/browse/FLEX-33651
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: DataGrid
> Affects Versions: Apache Flex 4.9.0
> Reporter: Shigeru Nakagaki
> Priority: Critical
> Attachments: EditableRendererFocusProblem.zip
>
>
> Try attached source.
> TAB key movement does not work correctly.
> Also TAB + Shift key movement does not work.
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