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https://issues.apache.org/jira/browse/FLEX-33875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13813844#comment-13813844
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Maurice Amsellem commented on FLEX-33875:
-----------------------------------------
As you said, it's not in the base class to provide strong typing.
But it must be declared in every subclass.
I can't imagine how a skin class that does not somehow reference it's
hostComponent could do something useful.
So maybe we should check for hostComponent presence when the skin is attached,
to ensure proper implementation of the skin contract.
But that's another story...
> Runtime error #1069 in MobileSkin class on focus out
> ----------------------------------------------------
>
> Key: FLEX-33875
> URL: https://issues.apache.org/jira/browse/FLEX-33875
> Project: Apache Flex
> Issue Type: Bug
> Components: Skinning
> Affects Versions: Apache Flex 4.10.0, Apache Flex 4.11.0
> Reporter: Aleksey
> Assignee: Justin Mclean
> Labels: easyfix
> Fix For: Apache Flex 4.12.0
>
>
> Hiting tab to move focus away from component which has pure AS skin without
> hostComponent property defined results in runtime error.
> Error happens in the endHighlightBitmapCapture of MobileSkin:
> public function endHighlightBitmapCapture():Boolean
> {
> var exclusions:Array = focusSkinExclusions;
> if (!exclusions)
> {
> if (this["hostComponent"] is SkinnableComponent)
> exclusions =
> SkinnableComponent(this["hostComponent"]).suggestedFocusSkinExclusions;
> }
> Note that property accessed as dynamic property but there is no check for
> property existence. It should be there just like in case of
> beginHighlightBitmapCapture:
> public function beginHighlightBitmapCapture():Boolean
> {
> var exclusions:Array = focusSkinExclusions;
> if (!exclusions)
> {
> if (("hostComponent" in this) && this["hostComponent"] is
> SkinnableComponent)
> exclusions =
> SkinnableComponent(this["hostComponent"]).suggestedFocusSkinExclusions;
> }
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