[Qgis-developer] Qt4->Qt5 timeline: Qt4's status and Qt4's webkit removal in Stretch

[Sebastiaan Couwenberg]

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On 05/10/2015 10:51 AM, Matthias Kuhn wrote:
> Hi
> 
> On 05/09/2015 03:28 PM, Paolo Cavallini wrote:
>> Il 09/05/2015 12:38, Sebastiaan Couwenberg ha scritto:
>> 
>>> How feasible is switching to Python 3?
>> I believe this would be a huge issue: most or all plugins will
>> not work, both the internal and the external ones, so our qgis
>> will be badly lame. Thanks for raising this point.
>> 
> There will probably be no PyQt4/Qt5 package but only a PyQt5/Qt5
> package? If there's a PyQt4/Qt5 package the upgrade process should
> be rather painless. If there's none, all plugins will need an
> update anyway and IMO the two changes PyQt5 and Python 3 should be
> grouped. Sebastiaan, do you know anything about this package?

I'm not involved in the Python or PyQt packaging, so I have no
intimate knowledges of those packages.

Both the python-qt4 [1] and pyqt5 [2] packages in Debian have the same
people involved. They may be willing to provide a python-qt4 package
built with qt5.

[1] https://tracker.debian.org/pkg/python-qt4
[2] https://tracker.debian.org/pkg/pyqt5

> The other issue is that there's a rather big dependency on
> QtWebkit currently. We are struggling already with that on
> Android. Alternatives * QtWebEngine is the future but only
> available starting from Qt 5.4. So this is not an option now. *
> QLabel/QML: Where it's only used for richtext, a QLabel can be
> used. Where there's javascript involved it may be worth
> investigating the use of QML.

The planned removal of the Qt4 WebKit component in Debian is the
primary reason to switch to Qt5. Sticking to the Qt5 Webkit until Qt
5.4 is widely available seems like the road of least resistance.

Kind Regards,

Bas

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