[FLEX-28922] Performance regression with Group.mouseEnabledWhereTransparent in 4.5.1

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: Group
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 31/Oct/11 14:20
• Updated: 03/Nov/11 14:02

Description

Customer reported performance problem (via Heidi and http://forums.adobe.com/thread/918527).

From Email Exchange with Evtim:

>I see what the problem is. We'd need to do some refactoring to fix the
>group hit-testing background in optimal way... We should fix this in
>ultra. Seems too risky for Mega though.
>
>I think best work-around I can suggest is set
>"mouseEnabledWhereTransparent" to "false" and add an invisible hit-testing
>Rect with 100% width & height to the Group.

Workaround (if any):

Set mouseEnabledWhereTransparent=false on the Group and add an invisible hit-testing Rect:

<s:Group mouseEnabledWhereTransparent="false">
<s:Rect width="100%" height="100%">
<s:fill>
<s:SolidColor color="white" alpha="0" />
</s:fill>
</s:Rect>
...
</s:Group>