Qt Weekly #19: QOpenGLWidget

Published Wednesday September 10th, 2014 | by

After Qt 5.3′s introduction of QQuickWidget, Qt 5.4 adds QOpenGLWidget, the long-awaited replacement for the legacy QGLWidget. This widget retains the familiar initializeGL/resizeGL/paintGL API, while enabling full interoperability with other widgets in complex user interfaces.

Internally QOpenGLWidget is built on the same technology as QQuickWidget. Unlike QGLWidget, it is not a native window and will not turn any siblings or ancestors into native either. This avoids stacking, clipping, focus and performance issues and is expected to behave identically across all supported platforms.

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Posted in Graphics, OpenGL, Qt

Qt 5.4 Alpha Available

Published Monday September 8th, 2014 | by

Qt 5.4 release process is ongoing and we now have the Qt 5.4 Alpha release available. As always, the Alpha is in source code only. Binary installers will be available in a few weeks with the Beta release. Features of Qt 5.4 are now frozen and in the next months the focus is in finalising and polishing functionality. To give an overview what is coming with Qt 5.4, I’ll summarise the highlights of the Qt 5.4 Alpha release.

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41 Comments


Posted in Qt, Releases

Join the Qt Fix and Polish Week

Published Friday September 5th, 2014 | by

Originally we thought the title should be Qt Bug Fixing week, but that would have been too simple.
Here at Digia, we always work to deliver the best Qt releases that we can. We work to fix as many bugs as possible, while still progressing and implementing new features. We try to please everyone and get the balance right.
However, sometimes it’s important to focus. For the week of the 15th to the 22nd of September, we decided we’ll step away from other tasks and take a fresh look at some outstanding issues. We will focus on three areas:

  • Bugs
  • Examples
  • Auto Tests

Qt has a great community that likes to know what’s going on and get involved! Instead of only keeping our efforts behind closed doors, we invite everyone to participate. We will coordinate most of the work through IRC (we’ll start #qt-bugs on freenode) and hope to get many P1s out of the way for Qt 5.4.

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Posted in Community, Contributors, Test

Looking for Qt Champions!

Published Wednesday September 3rd, 2014 | by

Qt Champions are the individuals who go that extra mile and make Qt shine.
Qt_Champion

They welcome you, they help you, they’ll hunt and fix bugs, they’ll give tips on good coding, they write and make videos and they are there at conferences to tell people of Qt.

A Qt Champion is a recognized superhero of the Qt Community. You’ll be able to identify Qt Champions online and at Qt events.

Today, we are launching an initiative to recognize and celebrate our Qt Champions. They deserve to be noticed online and offline.

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Posted in Community | Tags: ,


Qt Weekly #18: Static linking with Qt

Published Wednesday August 27th, 2014 | by

Qt has supported static builds for a long time, but iOS made this way of shipping Qt more widespread. To make the discussion about static linking more practical, we will not discuss things abstractly, but we will look at how to compile the Weather Info example application from the Qt Positioning module statically for iOS, and address questions as they come up.

 

Weather Info example app

Weather Info example app

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17 Comments


Posted in iOS

qbs 1.3.0 released

Published Tuesday August 26th, 2014 | by

We are happy to announce the release of qbs 1.3.0 today. Qbs, or Qt Build Suite, is a general cross-platform build tool that uses a language similar to QML for project description. Qbs can be used for any software project, whether it is written in Qt or not and it simplifies the build process for developing projects across multiple platforms.

If you haven’t tried it out yet, we strongly encourage you to take it for a spin to see how convenient building with Qbs is! Check out the documentation for more details.

What’s new in qbs 1.3?

For this release, we have concentrated on improving the integration with Qt Creator. The main points are:

  • Source files can now be added to (and removed from) qbs products via the project tree, just as for qmake projects. Thanks to Thomas Epting for the initiative!
  • More care is now taken to reload a project only if it is really necessary.
  • In addition, reloading a project has become somewhat faster, particularly in the case where a project file was changed without introducing any semantic differences (e.g. whitespace changes).

We think that these items, combined with a number of important bugfixes, have improved the user experience of working with qbs in Qt Creator a lot.

What else is worth mentioning?

On the language side, it is now possible to set different profiles for particular products. This is important for projects that need to produce binaries for different architectures.
Also, we have once again reduced the memory footprint significantly.

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8 Comments


Posted in Build system, QtCreator, Releases

Adding LGPL v3 to Qt

Published Wednesday August 20th, 2014 | by

20 years ago, Trolltech, the company that created Qt, was founded. One of its founding principles was to release Qt as free software to the open source community. In the early versions, this was limited to Unix/Linux and the X11 windowing system. Over the years, more and more platforms were included into the open source version of Qt.

At the same time, the licenses under which Qt was available evolved. The Qt 1.x source code was still released under a rather restrictive license. With Qt 2, we moved over to the QPL. Some years later, with Qt 4.0, Qt started to embrace the GPL v2, to remove some license conflicts between GPL-based applications and the QPL.

Trolltech was involved in talks with the Free Software Foundation (FSF) when the GPL v3 was created, and we added this license as an optional license for Qt after it was published by the FSF. Finally, in 2009 Nokia added LGPL v2.1 as a licensing option to Qt.

The spirit of all GNU licenses is about a strong copyleft, giving users rather strong access and rights to the source code of application and libraries. It was always meant to protect the users’ freedom to modify the application and underlying libraries and run the modified application.

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16 Comments


Posted in Community, KDE, News, Qt

Qt Creator 3.2.0 released

Published Tuesday August 19th, 2014 | by

We are happy to announce the Qt Creator 3.2.0 release today. This release adds many smaller and larger features, as well as fixing bugs. A few examples:

  • Block selections in text editors now allow you to do “column editing”, meaning that all selected lines are edited simultaneously (Qt Creator Manual)
  • Context help can now be configured to open in an external window (without disabling Help mode)
  • Support for C99 designated initializers and concatenated strings was added to the C++ code model, as well as improvements to encoding handling and lambda support and many other things
  • More panes are now searchable with Ctrl+F, for example the project tree
  • The QML profiler received many performance and stability improvements again

Enterprise Qt Creator users can now also use the QML profiler to debug their JavaScript memory usage in QML. (This is only available when using Qt 5.4 for the debugged application.)

Also have a look at our change log, for a more complete overview. I also want to thank the more than 50 contributors to this version of Qt Creator.

You find the opensource version on the Qt Project download page, and Enterprise packages on the Qt Account Portal. Please post issues in our bug tracker. You also can find us on IRC on #qt-creator on irc.freenode.net, and on the Qt Creator mailing list.

Note: With Qt Creator 3.2 we drop support for OS X 10.6 (Snow Leopard). The technical reason for this is that Apple does not support any kind of C++11 on that OS version. Of course that does not affect on which platforms you can run your Qt applications on. But it is not possible to run the Qt Creator 3.2 binaries on 10.6, and it also is not possible to compile Qt Creator 3.2 on 10.6 with the tool chains provided by Apple.

43 Comments


Posted in Qt, QtCreator, Releases

Qt Weekly #17: Linking Qt Classes in Documentation Generated with Doxygen

Published Wednesday August 13th, 2014 | by

Qt Weekly is back from vacation with a post from a guest blogger (*applause*).  In this post, Lorenz Haas tells us how to link Qt classes in custom documentation that is generated by using Doxygen.

By mid-2008, Sebastian Pipping introduced doxygen2qthelp for generating Qt Compressed Help files (*.qch) via Doxygen. Already by the end of the year, it was successfully merged into Doxygen. While 1.5.7.1 still had some mirror problems, version 1.5.8 provided stable and comprehensive support for creating QCH files out of the box. See Sebastian’s announcement as well as David Boddie’s article in Qt Quarterly.

Since then, this feature – I guess – has been used a thousand, a million times. Nowadays, I personally can’t imagine working without it. This is because it integrates perfectly into my favorite IDE – Qt Creator. There I can use my own documentation for context-sensitive help that can be triggered by the F1-shortcut:

without_links

 

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Posted in Documentation, doxygen2qthelp

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