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https://issues.apache.org/jira/browse/FLEX-28883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Kessler resolved FLEX-28883.
---------------------------------
Resolution: Fixed
> List.requireSelection doesn't always work
> -----------------------------------------
>
> Key: FLEX-28883
> URL: https://issues.apache.org/jira/browse/FLEX-28883
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: List
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Browser: Other (specify version)
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Mark Kessler
>
> Steps to reproduce:
> 1. Create a ListCollectionView and a filterFunction to it.
> 2. Create a List set requireSelection to 'true' and apply the collection as
> the dataProvider to a List.
> 3. Filter the collection so that all items are removed.
> 4. Filter the collection so that items are added again.
>
> Actual Results: The list shows the items without any selection.
>
>
> Expected Results: Due to 'requireSelection' being set to 'true', if the List
> displays items, one should be selected.
>
>
> Workaround (if any): This is due to 'requireSelection' only being applied
> once in commitProperties after it is set.
> commitProperties lines 907-920
> if (requireSelectionChanged)
> {
> requireSelectionChanged = false;
>
> if (requireSelection &&
> selectedIndex == NO_SELECTION &&
> dataProvider &&
> dataProvider.length > 0)
> {
> // Set the proposed selected index here to make sure
> // commitSelection() is called below.
> _proposedSelectedIndex = 0;
> }
> }
>
> When a collection is reset or refreshed the 'requiredSelection' property
> should be checked and if true 'requireSelectionChanged' should be set to
> 'true' so that selection is forced again in commitProperties.
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