[FLEX-20233] TileList controls don't allow selection of items with the same toString() value as later items in the list

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Adobe Flex SDK 3.0 (Release)
• Component/s: mx: TileList
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 17/Jul/09 09:54
• Updated: 17/Jul/09 10:01

Description

Verified in SDK 3.3 and 4.0

Steps to reproduce:
1. Create a class with a toString() method that returns the string "foo"
2. Create an ItemRenderer for this class
3. Add a nuber of instances to a TileList

Actual Results:
When mousing over any item, the last item in the list becomes highlighted, and when clicking on any it is the last item that is selected.

Workaround (if any):
Ensure that the toString() result is unique

My theory for why this mappens is that the ListBase class contains a number of maps defined as e.g.
protected var rowMap:Object = {};
Where objects are used as keys. Since Object-based hash maps require String keys, the VM converts the object key into a string usint key.toString(). A Dictionary should be used instead.