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https://issues.apache.org/jira/browse/FLEX-33722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13762835#comment-13762835
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Marcus Wilkinson edited comment on FLEX-33722 at 9/10/13 8:11 AM:
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I think there is still an issue here:
https://github.com/apache/flex-sdk/blob/develop/frameworks/projects/spark/src/spark/components/gridClasses/DataGridDragProxy.as#L162
in which element.hasLayoutMatrix3D is false, however, element.getLayoutMatrix()
returns null.
As mentioned above, in this case, doing
clone.setLayoutMatrix(MatrixUtil.composeMatrix ) seems to avoid the issue,
however the real problem I guess is why element.getLayoutMatrix is returning
null in this case (maybe because the newly instantiated Item Renderer is not on
the display list?)
My workaround for line 162 does the following:
clone.setLayoutMatrix(element.getLayoutMatrix()||MatrixUtil.composeMatrix(),
false);
was (Author: marcus_sparkus):
I think there is still an issue here:
https://github.com/apache/flex-sdk/blob/develop/frameworks/projects/spark/src/spark/components/gridClasses/DataGridDragProxy.as#L162
in which element.hasLayoutMatrix3D is false, however, element.getLayoutMatrix()
returns null
> Dragging a row with an itemRenderer which extends DefaultGridItemRenderer
> causes null pointer in mx.utils::MatrixUtil$/isDeltaIdentity()
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-33722
> URL: https://issues.apache.org/jira/browse/FLEX-33722
> Project: Apache Flex
> Issue Type: Bug
> Components: Drag and Drop, Spark: DataGrid
> Affects Versions: Apache Flex 4.10.0
> Reporter: Marcus Wilkinson
> Assignee: Justin Mclean
> Labels: datagrid, drag, itemrenderer, nullpointerexception
> Fix For: Apache Flex 4.11.0
>
> Attachments: FLEX-33722.mxml
>
>
> See attached for an example. I think this is down to two things:
> https://github.com/apache/flex-sdk/blob/develop/frameworks/projects/spark/src/spark/components/gridClasses/DataGridDragProxy.as
> element.getLayoutMatrix() is returning null. Doing a check for a null matrix,
> and returning an identity matrix seems to help
> https://github.com/apache/flex-sdk/blob/develop/frameworks/projects/spark/src/spark/components/gridClasses/DataGridDragProxy.as#L201
> I think this should be inside the loop, (at line 198)
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