Hi Thiago,
to make qt 5.6.x support the quick controls2 there are only a few changes
needed.
1. category is just adding code, which does not influence current code.
a. adding qAsConst in qgolbal.h. That is actually something i really like
to have in qt 5.6, because it is very useful and has no risk.
b. adding EditorFont to qplatformtheme.h enumeration ,has also no risk.
c. protect cleanup of QQmlEngine when removing from QQmlDebugConnector in
destructor, because quickcontrols2 instantiates
it in a way that it is not registered, but on cleanup crashes when
removing as there is no check if it was added at all. I consider
that a bug in Qt 5.6.1
d. adding QQuickItem::isAncestorOf function to qquickitem.* has also no risk.
e. adding Q_QUICK_PRIVATE_EXPORT to QQuickStateAction class in
qquickstate_p.h
2. category is enhancing code but also modifies existing code.
a. enhance qml module lookup behavior in a way making things a lot easier.
qqmlimport.* is changed ( by merging simply the code from 5.7 to do a
lookup like this:
For example, QtQml.Models 2.0:
- base/QtQml/Models.2.0/qmldir
- base/QtQml.2.0/Models/qmldir
- base/QtQml/Models.2/qmldir
- base/QtQml.2/Models/qmldir
- base/QtQml/Models/qmldir
This is very convenient. quickcontrols2 works without that but only with
the default style. quickcontrols1 is jumping
through hoops to achieve similar without change qtdeclarative.
b. adding MovementDirection property to QQuickPathView, i just copied
qquickpathview.* from qt 5.7. I assume a low risk,
but qt 5.7 has the same risk then.
The changes in the quick controls itself are just a matter of changing some 7
to a 6, 5.7.0 to 5.6.1 and 2.7 to 2.6
So actually I don’t see a dragon but maybe a dwarf lizard there ;-)
I can send the actual patches on request, they do not contain any code I wrote
myself ( other than changing numbers)
Regards,
Gunnar Roth
> Am 12.08.2016 um 18:26 schrieb Thiago Macieira <thiago.macie...@intel.com>:
>
> On sexta-feira, 12 de agosto de 2016 14:03:24 PDT Gunnar Roth wrote:
>> Does a request of having qtquickcontrols2 and qtvirtualkeyboard 2.1
>> backported to 5.6. x have chance? Actually I managed to do this myself, but
>> an upstream solutuion is preferrable. The problem is that some important OS
>> is no longer supported in 5.7.
>
> Quite impossible. Those are defintely new features.
>
> However, there's a compromise: we can have a branch for the unofficial
> support.
> Anyone using that will know "there be dragons"
>
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
> Software Architect - Intel Open Source Technology Center
>
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