>
> 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.
Cheers,
Pierre
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