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https://issues.apache.org/jira/browse/FLEX-33774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144693#comment-14144693
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Cosma Colanicchia commented on FLEX-33774:
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Probably I should take care of it myself :)
The patch was meant for 4.11, but I verified that no significant changes
have been made to Grid.as since then.
> grid.anchorRowIndex is reset to 0 when selection is programatically set
> (breaking further selection extend operations, e.g. SHIFT+CLICK)
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-33774
> URL: https://issues.apache.org/jira/browse/FLEX-33774
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: DataGrid
> Environment: Windows 7 64bit
> Reporter: Cosma Colanicchia
> Attachments: Grid.patch, TestGrid-screenshot.png, TestGrid.mxml,
> TestGrid.mxml
>
>
> When the selectedItems are programatically set on a DataGrid instance, the
> internal grid.anchorRowIndex is incorrectly reset to 0, even if displayed
> selection feedback is correct. When extending selection with SHIFT+CLICK on
> other rows, this incorrect value is computed and the new selection always
> starts from the first row.
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