[FLEX-20155] Spark BasicLayout should throw error/RTE when setting useVirtualLayout

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: BasicLayout
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 13/Jul/09 13:52
• Updated: 15/Apr/11 15:09
• Resolved: 20/Nov/09 14:31

Description

Found in trunk 4.0.0.8520.

Steps to reproduce:
1. Compile and run this:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/halo">

<s:layout>
<s:BasicLayout useVirtualLayout="true" />
</s:layout>

</s:Application>

Actual Results:
No errors. You only see a trace statement in your Debug panel if you happened to debug the app instead of just run it.

BasicLayout.as class has this (line 170+/-):
/**

• The BasicLayout class does not support virtualization.
• Setting this property to <code>true</code> generates a warning.
  *
• @langversion 3.0
• @playerversion Flash 10
• @playerversion AIR 1.5
• @productversion Flex 4
  */
  override public function set useVirtualLayout(value:Boolean):void { if (value) trace("Warning: BasicLayout doesn't support virtualization"); }

Expected Results:
Kaboom. It should RTE with some ArgumentError or whatever.
It doesnt "generate a warning" like the comments imply, it basically just traces that your useVirtualLayout set was illegal.

Workaround (if any):
n/a