[udig-devel] [jira] Created: (UDIG-734) The IOp framework needs a 'cance

["Adrian Custer (JIRA)" <jira@xxxxxxxxxxxx>]

The IOp framework needs a 'cancel' mechanism
--------------------------------------------

         Key: UDIG-734
         URL: http://jira.codehaus.org/browse/UDIG-734
     Project: uDIG
        Type: Bug

  Components: API libs  
    Versions: UDIG 1.1.M8    
 Environment: all
    Reporter: Adrian Custer
 Assigned to: David Zwiers 


The IOp framework needs a way for developers to bail out of an operation. Cory suggests the following workaround, which may be the way uDig wants to do things. 

>> In my IOp code, I launch a dialog for user input. If the user closes
>> that dialog or pushes a "Cancel" button, I'd like to make the IOp
>> cleanup and close. However, since this is being done inside inner
>> classes (eventListeners), I don't see how to bail out of the op()
>> method.
>> Is there a way to do this? If not would it be possible to change the
>> interface to add a cancel() method?
>>
> Hi Adrian,
>
> I'd think you could tell your ProgressMonitor that you've canceled  
> the task with monitor.setCanceled(true), and check the  
> monitor.isCanceled flag throughout your code.  You could also  
> override the Dialog methods close(), cancelPressed()... and perform  
> your cleanup there...
>
> Does that work?
>
> Cheers,
> Cory.

--adrian

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