Re: [matplotlib-devel] Time to delete backend_qt (QT3)?

[Benjamin R. <ben...@ou...>]

Did we remember to put in a deprecation notice for Qt3 support?

Ben Root

On Tue, Jul 10, 2012 at 11:44 AM, Darren Dale <dsd...@gm...> wrote:

> On Tue, Jul 10, 2012 at 8:54 AM, Benjamin Root <ben...@ou...> wrote:
> >
> >
> > On Tue, Jul 10, 2012 at 3:54 AM, Eric Firing <ef...@ha...> wrote:
> >>
> >> Is there any good reason *not* to delete support for Qt3 from master?
> >> Is anyone who is using it likely to be able to upgrade to the next mpl
> >> release, and yet *not* be able to install Qt4 and its bindings?  Note
> >> that ipython no longer supports Qt3.
> >>
> >> Eric
> >>
> >
> > CentOS5 and RHEL5 both have qt3 as part of the stock install (although it
> > does look like qt4 is available).  CentOS6 and RHEL6 seem to have qt4 as
> > default, with pyqt as well.
> >
> > Personally, I see no real reason to get rid of it quite yet as it doesn't
> > seem to be much of a support burden -- yet.  If anything, we might want
> to
> > consider putting deprecation notices for that backend in the next
> release.
>
> I also think its coming up on time to retire the Qt-3 backend, but
> perhaps a deprecation notice in mpl-1.2 and removal in mpl-1.3 would
> be appropriate. Then again, if mpl-1.2 supports python3, maybe that
> would be a good time to delete the Qt3 backend, since there is no
> python-3 binding for Qt3.
>
> By the way, Qt-5 is expected in September. Hopefully it won't require
> a dedicated backend, it sounds like PyQt4 will support Qt5's QtCore
> and QtGui libraries.
>
> Darren
>