FYI, this is going to affect building webkit trunk with Qt 5's master branches.
We could wait for a few days for the dust to settle and then add the include
and simple .pro file fixes
together with a bot update. What do you think?
Simon
--- Begin Message ---
The merge will happen tomorrow morning, Oslo time.
On Sep 5, 2011, at 11:41 AM, ext [email protected] wrote:
> Hi,
>
> We are getting closer to the point where we integrate the Qt refactor branch.
> What this branch does is that it separates most of Qt's desktop widgets along
> with a number of currently less actively developed modules into their own
> libraries, in accordance with the module maturity list we published earlier
> this year and in line with Lars' blog about the intent of Qt 5. The over all
> goal is to simplify our graphics stack, minimize our platform/device
> dependent layer (lighthouse integration) and make sure QML and OpenGL are
> prime citizens in Qt 5.
>
> These branches are not at feature parity with Qt 4.7 yet, and nor will they
> be for a quite some time. But we want to push the changes into the master
> codeline so that the structure we have mentioned in blogs and other forums
> gets visible in terms of code.
>
> Currently we have "official" support for single-window, QML 2 based on OpenGL
> on Linux/X11, Linux/XCB, Linux/Wayland and Mac OS X. There is some
> rudimentary support for the same setup on Windows, but it is still work in
> progress. Our stack works on top of Software Mesa (very slow), LLVMpipe (very
> fast) in addition to real OpenGL hardware (usually fastest).
>
> Standard widget based applications still works, but they are not our current
> priority. We will pick this up once the QML 2 stack is more complete.
>
> We're expecting to merge into master in 1-2 weeks time.
>
> What are the changes in practice?
> - code that use widgets need to add "QT += widgets" in their .pro file
> - code that includes <QtGui/QLabel> or similar needs to be updated to
> <QtWidgets/QLabel>. The helper script "fixqt4headers" in QTDIR/bin does this
> for you. Run it in the root directory and you are done.
> - There is a new suite of OpenGL classes inside QtGUI, named QOpenGLXxx which
> integrates tightly with lighthouse. To keep changes to existing code minimal,
> we decided to keep the existing libQtOpenGL classes pretty much as is without
> any changes, and rather introduce new classes in QtGui for the classes we
> wanted.
> - Printing support has been moved into its own library, libQtPrintSupport. We
> have a long term plan of creating a better printing API, covered
> inhttps://bugreports.qt.nokia.com//browse/QTBUG-19951, so we have spent some
> effort in removing the dependency on the current API's from the "Qt
> essentials". The API is unchanged.
>
>
> Can I expect any performance changes?
> - No. This is about removing a large chunk of code to make our stack simpler
> to maintain and to have smaller footprint.
>
>
> What can I plan for?
> - In new projects, see if you can use QML 2 instead of QWidgets.
> - In new projects, see if you can use QML 2 instead of QML 1.
> - In new projects, see if you can use V8 instead of QtScript. (QJSValue and
> QJSEngine classes in libQtDeclarative)
> - In new projects, see if you can use OpenGL functionality in QtGui instead
> of libQtOpenGL.so
>
>
> What does this means for you right away?
> - If you upgrade to Qt5 with refactor, you need to update the includes and
> add widgets/script/qtquick1 to your .pro files
>
>
> What does this means long term?
> - None of the existing libraries
>
> I hope this transition will be as painless as possible for everyone. If you
> have further questions, don't hesitate to ask
>
> -
> Gunnar
> _______________________________________________
> Qt5-feedback mailing list
> [email protected]
> http://lists.qt.nokia.com/mailman/listinfo/qt5-feedback
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