[udig-devel] RenderManagerAdapters NullPointerException

[Leigh Fitzgibbon]

I just worked out what caused the error and how it can be reproduced.  

Suppose I open a UDig map editor, then select a layer from the Layers view
to populate the "Table" view.  I also have another editor open (in this case
a Eurobios Schedule Editor) and now I select that editor making it the
active editor.  I can now cause the error to occur by clicking on a row in
the "Table" view and selecting "Show Selection".  I can eliminate the error
by clicking on the UDig map thus making it the active editor.

There are probably many other ways to reproduce it - it seems to be an issue
with the map (or a map?) not being the active editor.
 
Cheers,
Leigh

-----Original Message-----
From: udig-devel-bounces at lists.refractions.net
[mailto:udig-devel-bounces at lists.refractions.net] On Behalf Of Jody Garnett
Sent: Friday, 14 December 2007 6:19 PM
To: User-friendly Desktop Internet GIS
Subject: Re: [udig-devel] RenderManagerAdapters NullPointerException

Leigh Fitzgibbon wrote:
> I just ran into this error:
>   
Thanks; can you tell me what was going on when you got this error? My 
guess is you were closing the editor; and a change event fired off after 
the editor was closed.

I created an task to track this report:
- http://jira.codehaus.org/browse/UDIG-1345
> Which is caused by the following code because the active editor is null:
>   
Thanks: here is my patch; but I am not sure if I should commit; it may 
only mask a real problem. Can you tell me more about what happened to 
cause this error?
>             public void notifyChanged( Notification msg ) {
>                 manager.checkState();
>                 switch( msg.getFeatureID(ViewportModel.class) ) {
>                 case RenderPackage.VIEWPORT_MODEL__BOUNDS: {
>                     MapEditor activeEditor = 
> ApplicationGISInternal.getActiveEditor();
>                     if( activeEditor != null && activeEditor.isVisible() )
>                         refreshDirtyArea(msg);
>                     break;
>                 }
>                 case RenderPackage.VIEWPORT_MODEL__CRS: {
>                     manager.refresh(null);
>                     break;
>                 }
>                 }// switch
>             }
Jody
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