[FLEX-22554] Tree component - assign diffferent arrayCollectoin as dataprovider won't work if showRoot=false in particular case.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Adobe Flex SDK 4.5 (Release)
• Component/s: mx: Tree
• Environment: Affected OS(s): Windows; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 22/Dec/09 17:04
• Updated: 22/Dec/09 17:04

Description

Steps to reproduce:
1. Create two items like this:

//note: both items have children items.
private var _item1 : XML = new XML('<item label="item1"><item label="kid1"/></item>');
private var _item2 : XML = new XML('<item label="item2"><item label="kid2"/></item>');

and two arrayCollection(s):

private var _dp1 = new ArrayCollection();
private var _dp2 = new ArrayCollection();

private function init() : void

{ //_dp1 only has one item. _dp1.addItem(_item1); // _dp2 has two items. _dp2.addItem(_item1); _dp2.addItem(_item2); }

2. create a tree component with showRoot=false and labelField="@label"

3. assign _dp1 to the tree --> "kid1" being displayed.

4. assign _dp2 to the tree --> nothing being displayed.

5. if you assign _dp2 to the tree first --> two items and kids will be displayed.

The cause:
The tree component intenrally set _hasRoot flag = true when the dataprovider is an ICollectionView and length is 1. (From the document of hasRoot() it says "Lists and arrays do not have root".)
Note: everything works as expected if I passed in a XMLListCollection instead of ArrayCollection.

Actual Results:

Expected Results:

Workaround (if any):