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https://issues.apache.org/jira/browse/FLEX-32599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13610960#comment-13610960
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darren db commented on FLEX-32599:
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I have this issue as well. If the mouse is moved across the ADG header during
startup, these errors are thrown:
Error: Error #1009: Cannot access a property or method of a null object
reference.
at
mx.controls::AdvancedDataGrid/findHeaderRenderer()[E:\dev\4.5.1\frameworks\projects\advancedgrids\src\mx\controls\AdvancedDataGrid.as:5866]
at
mx.controls::AdvancedDataGrid/mouseEventToItemRenderer()[E:\dev\4.5.1\frameworks\projects\advancedgrids\src\mx\controls\AdvancedDataGrid.as:2155]
at
mx.controls::AdvancedDataGrid/mouseOutHandler()[E:\dev\4.5.1\frameworks\projects\advancedgrids\src\mx\controls\AdvancedDataGrid.as
Very easy to reproduce, not sure how to prevent, other than some artificial
button blocker or hacks with enabling and disabling the grid...
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.at
> mx.controls::AdvancedDataGrid/findHeaderRenderer()mx.controls::AdvancedDataGrid/mouseEventToItemRenderer()
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-32599
> URL: https://issues.apache.org/jira/browse/FLEX-32599
> Project: Apache Flex
> Issue Type: Bug
> Components: Advanced Data Grid
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): Windows
> Affected OS(s):
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Adobe JIRA
> Priority: Minor
>
> Steps to reproduce:
> 1. Columns created
> 2. dataProvider is initializing
> 3. moving to header of the grid then error occured.
>
> Actual Results:
> runtime error occured
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
> at mx.controls::AdvancedDataGrid/findHeaderRenderer()
> at mx.controls::AdvancedDataGrid/mouseEventToItemRenderer()
> at mx.controls.listClasses::AdvancedListBase/mouseMoveHandler()
>
> Expected Results:
> no error should be occur.
>
> Workaround (if any):
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