On Sat, Nov 7, 2009 at 9:53 AM, Pierre Raybaut <cont...@pythonxy.com> wrote:
>>
>> On Wed, Nov 4, 2009 at 5:29 PM, Pierre Raybaut <cont...@pythonxy.com>
>> wrote:
>>
>>>
>>> > A simpler fix would be:
>>> >
>>> > ? ? ? ?class FigureWindow(QtGui.QMainWindow):
>>> > ? ? ? ? ? ?def __init__(self):
>>> > ? ? ? ? ? ? ? ?super(FigureWindow, self).__init__()
>>> >
>>> > ? ? ? ? ? ?def closeEvent(self, event):
>>> > ? ? ? ? ? ? ? ?super(FigureWindow, self).closeEvent(event)
>>> > ? ? ? ? ? ? ? ?self.emit(QtCore.SIGNAL('destroyed()'))
>>> >
>>> > and replacing QtGui.QMainWindow by FigureWindow in FigureManagerQT.
>>>
>>
>> I am pretty sure this is not caused by matplotlib, but rather a
>> regression in PyQt4 that will be fixed in the next release. There is a
>> post on the PyQt mailing list titled "Regressions on destruction of
>> objects?" and a note in the development snapshots changelog. If I try
>> your example with PyQt4-4.5.4, it works fine, but it crashes with
>> 4.6.1. I will revisit the issue once PyQt4-4.7 is released.
>>
>> Darren
>>
>
> I completely agree -- in the meantime I checked that despite the QMainWindow
> instance has been destroyed, the 'destroyed()' signal is not emitted, so the
> problem is definitely coming from PyQt4, not matplotlib.
>
> However, to help unfortunate users of PyQt4 v4.6 and v4.6.1, I've added the
> following workaround in Spyder (Spyder is monkey patching matplotlib anyway,
> to integrate mpl dockable figures in Spyder's GUI) -- other users may be
> interested to patch their matplotlib installation
> (matplotlib/backends/backend_qt4.py):
>
> # Add this before "FigureManagerQT" class
> class FigureWindow(QMainWindow):
> def __init__(self):
> super(FigureWindow, self).__init__() def closeEvent(self,
> event):
> super(FigureWindow, self).closeEvent(event)
> if PYQT_VERSION_STR.startswith('4.6'):
> self.emit(SIGNAL('destroyed()'))
> # Replace "QtGui.QMainWindow" by "FigureWindow" in "FigureManagerQT"'s
> constructor
>
> I hope this will be fixed in v4.6.2.
Me too. And thank you for posting the report and a workaround.
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