[pydocview] Error when closing an SDI application with multiple windows using File->Exit

[Klaus Nowikow]

Hi!

I am using wxPython 2.8.4.0 on Linux.

When I open multiple documents in my pydocview SDI application,
each with its own view, I get this traceback when closing the app
by selecting "Exit" from the File menu:

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/lib/pydocview.py", line 2372, in OnExit
    self.Destroy()
  File "/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14041, in __getattr__
    raise PyDeadObjectError(self.attrStr % self._name)
wx._core.PyDeadObjectError: The C++ part of the DocSDIFrame object has been deleted, attribute
access no longer allowed.

I learnded that I have to override the OnClose() method of my view so that
it closes the window - otherwise I get a PyDeadObjectError concerning the document
object:

    def OnClose(self, deleteWindow=True):
        # Call parent class
        close = docview.View.OnClose(self, deleteWindow)
        # Close frame
        if close and deleteWindow:
            self.GetFrame().Close(True)
        return close

But the DocSDIFrame seems to try to destroy itself once more:

    def OnExit(self, event):
        """
        Called when the application is exitting.
        """
        # In there, View.OnClose() gets called
        if self._childView.GetDocumentManager().Clear(force = False):
            self.Destroy() # <- Here the frame is deleted a second time => traceback
        else:
            event.Veto()

Do I have to handle the closing of the view another way?

Btw, the event object that is passed to OnExit() above is of type CommandEvent,
which does not have a Veto() method.

--
Klaus