[FLEX-28883] List.requireSelection doesn't always work

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: List
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Browser: Other (specify version); Language Found: English
• Assignee: Mark Kessler
• Reporter: Adobe JIRA
• Created: 25/Oct/11 07:41
• Updated: 18/Apr/13 01:58
• Resolved: 18/Apr/13 01:58

Description

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.