[jira] [Commented] (FLEX-34634) DataGroup fires RendererExistenceEvent with a null renderer when an offscreen item is removed/replaced in the dataProvider

["Gareth Daniel Smith (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLEX-34634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14215991#comment-14215991 ] 

Gareth Daniel Smith commented on FLEX-34634:
--------------------------------------------

Thanks!

> DataGroup fires RendererExistenceEvent with a null renderer when an offscreen item is removed/replaced in the dataProvider
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLEX-34634
>                 URL: https://issues.apache.org/jira/browse/FLEX-34634
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Spark: DataGroup
>    Affects Versions: Apache Flex 4.13.0
>            Reporter: Gareth Daniel Smith
>            Assignee: Erik de Bruin
>            Priority: Minor
>              Labels: eastyest, easyfix
>             Fix For: Apache Flex 4.14.0
>
>         Attachments: flex-34634.patch, null-renderer-bug.zip
>
>
> To me this looks like a bug in DataGroup.
> It looks like a fairly easy fix. I think a null check is needed around the dispatchEvent call at: https://github.com/apache/flex-sdk/blame/930b545e0cfad5c7ae8f08cd29e21a144d08227b/frameworks/projects/spark/src/spark/components/DataGroup.as#L1766
> I will attach a test case.



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