Let me try to upgrade to PyQt 4.5--I'm currently using 4.4.3 on vista 32
bit. Btw. are you using python 2.6 or 2.5 (I ask because I'm still on 2.5
and am wondering if anyone has noticed any difficulties with 2.6).
Cheers,
Wiliam
On Mon, Aug 31, 2009 at 9:36 AM, Darren Dale <dsdal...@gmail.com> wrote:
> Hi William,
>
> On Mon, Aug 31, 2009 at 8:25 AM, william
> ratcliff<william.ratcl...@gmail.com> wrote:
> > Hi! I just installed matplotlib version .99 (windows vista, python25,
> > 32bit) and found that
> > this line was missing:
> > QtGui.qApp.processEvents()
> >
> > Adding it sped the QT4Agg backend back to reasonable speeds--but it still
> > seems a bit slow. Otherwise, I am using the excellent Python(x,y) 2.1.14
> > release for my python distribution on this machine. Could this line be
> > added back?
>
> Unfortunately, no, that line can not be added back in. When that line
> is in place, the backend attempts to process queued events before it
> is finished processing the current event. It was leading to segfaults
> in some cases. processEvents should not be called in the middle of
> processing an event.
>
> I tested the responsiveness of panning and zooming with and without
> that call to processEvents, on Linux and windows and it looked fine.
> Maybe its an issue related to a specific Qt version on windows. Things
> looked fine for me with Qt-4.5/PyQt-4.5 on 64bit Vista.
>
> Darren
>
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