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https://issues.apache.org/jira/browse/FLEX-34040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13917635#comment-13917635
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Justin Mclean commented on FLEX-34040:
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I do note however that the sample code is removing a non-existent event
listener.
> GroupBase incorrectly computes hasMouseListeners which breaks e.g.
> mouseEnabledWhereTransparent
> -----------------------------------------------------------------------------------------------
>
> Key: FLEX-34040
> URL: https://issues.apache.org/jira/browse/FLEX-34040
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: Group
> Affects Versions: Apache Flex 4.11.0
> Reporter: Borek Bernard
> Labels: easytest
> Attachments: Flex34040Demo.fxp
>
>
> The `GroupBase#hasMouseListeners` property is vital for things like
> dispatching mouse events on transparent parts on the group, however, the
> current algo is incorrect - it just increments a counter every time
> addEventListener() is called and decrements it when removeEventListener() is
> called.
> That means that when I call addEventListener("click") and then
> removeEventListener("someOtherMouseEvent"), the hasMouseListeners property
> will be false even though I have an active "click" listener.
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