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

[Eric F. <ef...@ha...>]

On 2012/09/09 9:01 AM, Benjamin Root wrote:
> Did we remember to put in a deprecation notice for Qt3 support?

I don't think so.  Presumably it should be a deprecation warning upon 
importing backend_qt, and a note in whats_new.

Eric

>
> Ben Root
>
> On Tue, Jul 10, 2012 at 11:44 AM, Darren Dale <dsd...@gm...
> <mailto:dsd...@gm...>> wrote:
>
>     On Tue, Jul 10, 2012 at 8:54 AM, Benjamin Root <ben...@ou...
>     <mailto:ben...@ou...>> wrote:
>      >
>      >
>      > On Tue, Jul 10, 2012 at 3:54 AM, Eric Firing <ef...@ha...
>     <mailto: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
>
>