[Qgis-developer] Minimum qt version - bumping to 4.6?

[Larry Shaffer]

Hi,

On Tue, Nov 12, 2013 at 1:01 AM, Martin Dobias <wonder.sk at gmail.com> wrote:

> On Tue, Nov 12, 2013 at 1:51 PM, Werner Macho <werner.macho at gmail.com>
> wrote:
> > I'd rather take the step forward to 4.8 either .. even the stable
> > version of debian (which is usually behind everything) has QT4.8.
> >
> > Opinions?
>
> For me +1 to set Qt 4.8 as a minimum for next release of QGIS.... Qt
> 4.8.0 is now nearly two years old - seems like distributions have had
> enough time to get the packages ready.
>

When this was last discussed [0] (over a year ago, and to no conclusion),
the lowest version for Qt, on a production platform providing QGIS, was
4.5, but there were third-party updates for those platforms even then.

+1 for at least Qt 4.6 as the new minimum. However, with some more
research, we may find 4.7, or even 4.8, reasonable.

On the Mac side of things, I think William has routinely shipped QGIS with
the most recent stable version of Qt 4 at the time. The nightly is also
built that way. Currently on Mac OS X 10.6-9 this would be Qt 4.8.5.

For OSGeo4W, it looks like the x86 installer provides 4.7.1, while the
x86_64 installer is at 4.8.5 [1].

[0] http://osgeo-org.1560.x6.nabble.com/Minimal-Qt-version-td4995316.html
[1] http://download.osgeo.org/osgeo4w/versions_diff-x86-x86_64.html

It would be nice to finally be able to use the new features (e.g. QML
> - and have qgis_qml library with QML canvas, legend...)
>

+1 for this. In fact, I think it is very important to investigate what
moving to an entire QGIS GUI built upon QML would take (or if it is even
possible, yet). And personally, I see Digia focusing most of its energy in
QML, though I think Qt Wdigets have at least a good 5-year "shelf life."
Side note: new Ubuntu Touch OS (to be installable on many Android tablets)
runs QML natively for its GUI [2].

[2] https://wiki.ubuntu.com/Touch

Regards,

Larry


> Regards
> Martin
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