Qt Archive

Key changes in Qt 6.0 include: • Leveraging C++17• Next generation QML• New graphics architecture• Unified 2D and 3D for Qt Quick• CMake build system (with qmake still supported for applications)• Multiple improvements throughout A big release – but I’m not a programmer so I won’t pretend to try and understand all of this.

With the release of Qt 6.0 upcoming, let’s see what has happened since Qt 5.15. It will not be possible to cover every detail of the graphics stack improvements for Qt Quick here, let alone dive into the vast amount of Qt Quick 3D features, many of which are new or improved in Qt 6.0. Rather, the aim is just to give an overview of what can be expected from the graphics stack perspective when Qt 6.0 ships later this year. Exactly what is says on the tin. Especially Qt developers will obviously want to read this.

There’s a storm brewing in the world of Qt and KDE, as the parent company of Qt, The Qt Company, is contemplating restricting new Qt releases to paying customers (i.e., not releasing them as open source) for twelve months. This obviously affects the KDE project considerably, who have been negotiating with The Qt Company for years now. An announcement made by The Qt Company in January derailed said negotiations, however. As KDE’s Olaf Schmidt-Wischhöfer explains: They announced that LTS releases of Qt will only be available for paid license holders. It is still unclear what this implies for contributions to Qt and for the sharing of security fixes between the various parties (including The Qt Company, the many Qt experts contributing, the KDE community, and Linux distributions). It seemed the two parties were working on a path forward acceptable to all parties involved, but then came the announcement earlier today that The Qt Company was contemplating restricting all releases to paid customers for twelve months. It seems bad blood has been brewing for a while, as Schmidt-Wischhöfer states: The Qt Company says that they are willing to reconsider the approach only if we offer them concessions in other areas. I am reminded, however, of the situation half a year ago. We had discussed an approach for contract updates, which they suddenly threw away by restricting LTS releases of Qt instead. All software changes in Qt will still be available at as Open Source as required by our contract – maybe with a delay of 12 months if the company decides to part ways with the communities. We will continue to work on a contract update that helps all sides. But even if these negotiations were to be unilaterally stopped by The Qt Company, Qt will stay Open Source, and KDE will be able to use it. I am also absolutely sure that the Qt + KDE communities will continue cooperation on new features, bug fixes, and security fixes, even should The Qt Company decide to forgo the benefits of cooperation. Luckily for the future of KDE and Qt, there is an agreement in place between KDE and The Qt Company that states that “ should The Qt Company discontinue the development of the Qt Free Edition under the required licenses, then the Foundation has the right to release Qt under a BSD-style license or under other open source licenses.” This is a serious issue that I hope can be resolved, as nobody will benefit from a serious rift between The Qt Company and the KDE project.

Qt Marketplace is an innovation platform for our community. It brings together Qt developers and designers looking for new ways to enhance their Qt design and development workflow, and developers and companies who have already implemented extensions to Qt and want to make them available for everyone in the whole Qt ecosystem. Either for free or for a price. In the initial release our theme is discoverability. To put this simple: We want the marketplace to become the #1 place for our community to find and share content for Qt. An app store for Qt developers, basically.

Not only an interesting look at Qt history, but also a look back on mid 90s C++, and what has and hasn't changed.

"For this preliminary release, we are focusing on the developer experience, working to enable Qt developers to easily run and test their applications on Android devices. While there's nothing preventing you from deploying your app to an app store with Qt 5.1, we're recommending that people wait until Qt 5.2 before they do that, as we'd like to put some more work into improving that experience: making more options for how your app is deployed, adding more polish in general, and adding more support for Android APIs, both by allowing you to extend your app with Java code or by mapping them in C++ APIs, whichever makes the most sense."

A Jolla (Sailfish) developer and a Canonical (Ubuntu Phone) developer walk into a KDE/Plasma IRC channel, and fire up a conversation about the QML component API. Not long after, the first fruits of this conversation become apparent. Aaron Seigo (who uses punctuation these days!): "Well, one thing led to another and Zoltan posted an email to the Qt Components mailing list summing up the conversation and proposing we bring our APIs into better alignment. We hope to address issues of API drift between the various component sets out there. This is a pain point others have identified, such as in this recent blog post by Johan Thelin. There is much work to be done before we can even think of calling this a success, but it's the right sort of start." Great news.

Digia has announced that it has signed an agreement to acquire the Qt software technologies and Qt business from Nokia. Digia has sent a letter to the KDE team that it intends to pretty much continue what Trolltech and Nokia built up, so not a whole lot ought to change for KDE - luckily.

"The Qt development toolkit is undergoing a major overhaul. The developers behind the project announced the availability of the Qt 5 alpha release this week. It's a key milestone on the path to the official launch of Qt 5, expected to occur later this year." The kind of stuff to read Ars for.

"I'm happy to announce that the Qt Project officially went live today. Starting today, development of Qt will be governed as a true open source project. We now have qt-project.org - a website where all development of Qt will be centered, providing the same infrastructure and processes for everybody that wants to contribute to Qt."

The QT framework has become the a popular route to port several open source applications to OS/2 and eComStation. Version 4.7.3 has been ported to this platform and it is available for download; the improvement list is also available. The QT Creator IDE has also been ported.