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[Jean-Paul Calderone <exarkun@xxxxxxxxxxxxxxxxx>]

** Branch linked: lp:~exarkun/divmod.org/grabber-scheduler-usage

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https://bugs.launchpad.net/bugs/987820

Title:
  Cannot delete grabbers

Status in Multi-protocol messaging server and tools:
  New

Bug description:
  When trying to delete a grabber I've created I get the following
  error:

  Failure: TypeError: Object <"Instance" of Quotient.Grabber.ScrollingWidget> has no method 'showErrorDialog' caught while calling method "performAction"
  Please retry

          Traceback (most recent call last):
            File "/home/alex/divtest/lib/python2.6/site-packages/Nevow-0.10.0-py2.6.egg/nevow/athena.py", line 574, in renderHTTP
              response = self.messageDeliverer.basketCaseReceived(ctx, messageData)
            File "/home/alex/divtest/lib/python2.6/site-packages/Nevow-0.10.0-py2.6.egg/nevow/athena.py", line 869, in basketCaseReceived
              self.livePage.liveTransportMessageReceived(ctx, msg)
            File "/home/alex/divtest/lib/python2.6/site-packages/Nevow-0.10.0-py2.6.egg/nevow/athena.py", line 1452, in liveTransportMessageReceived
              method(ctx, *args)
            File "/home/alex/divtest/lib/python2.6/site-packages/Nevow-0.10.0-py2.6.egg/nevow/athena.py", line 1465, in action_call
              result = defer.maybeDeferred(func, *args, **kwargs)
          --- <exception caught here> ---
            File "/home/alex/divtest/lib/python2.6/site-packages/twisted/internet/defer.py", line 134, in maybeDeferred
              result = f(*args, **kw)
            File "/home/alex/divtest/lib/python2.6/site-packages/xmantissa/scrolltable.py", line 693, in performAction
              return method(item)
            File "/home/alex/divtest/lib/python2.6/site-packages/xquotient/grabber.py", line 849, in action_delete
              grabber.delete()
            File "/home/alex/divtest/lib/python2.6/site-packages/xquotient/grabber.py", line 277, in delete
              self.config.scheduler.unscheduleAll(self)
          exceptions.AttributeError: 'GrabberConfiguration' object has no attribute 'scheduler'

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