[FLEX-14754] "TypeError: Error #1010: A term is undefined and has no properties" when scrolling through a TileList with the keyboard when the selected tile is offscreen.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Later
• Affects Version/s: Adobe Flex SDK 3.0 (Release)
• Component/s: mx: TileList
• Environment: Affected OS(s): Windows; Affected OS(s): Windows XP; Browser: Internet Explorer 7.x; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 16/May/08 14:29
• Updated: 25/Aug/09 11:34
• Resolved: 07/Oct/08 23:19

Description

Steps to reproduce:
1. Create a tilelist using the following code

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:initialize>
<![CDATA[
for (var counter:int = 0; counter < 2000; counter ++)

{ objArrayCollection.addItem(new Label()); }

]]
>
</mx:initialize>
<mx:TileList x="0" y="0" width="640" height="480" rowHeight="100" columnWidth="100" direction="horizontal" dataProvider="

{objArrayCollection}

" itemRenderer="mx.controls.Label">
</mx:TileList>
<mx:Script>
<![CDATA[
import mx.controls.Label;
import mx.collections.ArrayCollection;

[Bindable]
private var objArrayCollection:ArrayCollection = new ArrayCollection;
]]
>
</mx:Script>
</mx:Application>

2. Scroll half-way down the tilelist and select a tile.
3. Scroll back up to the top of the tilelist.
4. Use the arrow keys to navigate down.

Actual Results:
TypeError: Error #1010: A term is undefined and has no properties.
at mx.controls.listClasses::TileBase/finishKeySelection()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasses\TileBase.as:1650]
at mx.controls.listClasses::TileBase/moveSelectionVertically()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasses\TileBase.as:1365]
at mx.controls.listClasses::TileBase/keyDownHandler()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasses\TileBase.as:2484]

Expected Results:
The tilelist jumps to the selected tile.

Workaround (if any):
None