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From "John Hall (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLEX-35369) RTE: DragProxy Error
Date Fri, 08 Dec 2017 17:22:00 GMT

     [ https://issues.apache.org/jira/browse/FLEX-35369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

John Hall updated FLEX-35369:
-----------------------------
    Summary: RTE: DragProxy Error  (was: DragProxy Error)

> RTE: DragProxy Error
> --------------------
>
>                 Key: FLEX-35369
>                 URL: https://issues.apache.org/jira/browse/FLEX-35369
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Spark: Window
>    Affects Versions: Apache Flex 4.16.0
>         Environment: Windows 10
>            Reporter: John Hall
>             Fix For: Apache Flex 4.16.1
>
>
> Working with NativeDragDrop on occasion I get the following error
> TypeError: Error #1009: Cannot access a property or method of a null object reference.

>         at mx.managers.dragClasses::DragProxy/mouseUpHandler()[/Users/justinmclean/Documents/ApacheFlex4.16/frameworks/projects/framework/src/mx/managers/dragClasses/DragProxy.as:660]

>         at mx.managers.dragClasses::DragProxy/mouseLeaveHandler()[/Users/justinmclean/Documents/ApacheFlex4.16/frameworks/projects/framework/src/mx/managers/dragClasses/DragProxy.as:561]

>         at flash.events::EventDispatcher/dispatchEventFunction() 
>         at flash.events::EventDispatcher/dispatchEvent() 
>         at mx.managers::WindowedSystemManager/mouseLeaveHandler()[/Users/justinmclean/Documents/ApacheFlex4.16/frameworks/projects/airframework/src/mx/managers/WindowedSystemManager.as:2306]

> Alex Harui's comment on the forum was:
> _Hi, 
> The stack trace points out a legitimate bug.  If the Drag starts, but then 
> the mouse goes out of the app and the button is released without any 
> mouseMove events coming into the DragProxy, the lastMouseEvent has not 
> been set and you'll get this crash. 
> I'm not quite sure how you can get zero "mouseMove" events, but maybe if 
> you drag fast enough while the app is computing the thing to drag. 
> File a bug if you can.  You shouldn't need to build the SDK to fix this 
> problem.  You can use monkey-patching instead.  Search the internet for 
> articles on "Flex Monkey Patching". 
> Thanks, 
> -Alex 
> _



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