In this article, I will take a look at one of the fundamental concepts introduced in Alex Stepanov and Paul McJones’ seminal book “Elements of Programming” (EoP for short) — that of a (Semi-)Regular Type and Partially-Formed State. Using these, I shall try to derive rules for C++ implementations of what are commonly called “value […]
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Our engineers and designers share cutting-edge technology news and ideas with regard to Qt, QML, Qt on Android, OpenGL, Qt 3D, Vulkan, Scalable UIs and more embedded, mobile and desktop-related topics.
“Unboxing” the Android Things Developer Preview
Android Things is Google’s answer to creating an environment for IoT devices. Take a slimmed down Android build, add some sensor-specific APIs, and provide it on a number of powerful pre-integrated micro-boards and you have a ready-made platform for building a host of upcoming IoT devices. Android Things can take advantage of many existing Android […]
KDAB adds five new trainings in 2017
We’re adding an exciting raft of new trainings to our schedule for 2017 and some new locations, including San Francisco, Seoul and Beijing. Throughout the year you will be able to sign up for top class, always-up-to-date, original-authored trainings, presented by fully qualified KDAB trainers, all engineers actively involved in delivering KDAB’s high quality projects. […]
Writing Code That Won’t Kill A collection of reading material, white papers, and academic journals about functional safety
Functional Safety is the term used for systems designed to minimize risk to human health. But there’s a dilemma in today’s tech-driven world. We are more reliant than ever on software to control our planes, trains, cars, and boats, to operate our medical equipment, to process our food, to clean our water, and to power […]
Fixing bugs via lateral thinking Lessons learned by digging into obscure QML bugs
For today’s blog I would like to share with you the little adventure I had when fixing a very strange bug in Qt. Pop quiz Don’t think about this too much, just guess: what does this QML snippet print? There are no JavaScript semantic tricks involved; and using either == or === does not change […]
QtCon Videos On-line
We’re delighted all the QtCon talks have now been released, thanks to the hard work of the folks at KDE. Many KDABians attended QtCon and contributed to the unique new Qt event we co-created in Berlin, September 2016, along with Qt Contributors, KDE Akademy, VideoLan and FSFE. KDAB funded the event upfront and was Gold sponsor at QtCon […]
GammaRay Taking a deep look into your Qt application
GammaRay is a high-level runtime introspection tool for Qt applications. In this talk we will look at a number of real-world debugging and profiling problems and how the capabilities provided by GammaRay help you with those. When creating applications we strive to use higher-level frameworks to obtain results quickly and reduce development effort and long-term […]
Multithreading with Qt How to leverage the modern C++11 threading capabilities in your Qt application
This talk introduces you to the fundamentals of threading in Qt. We will discuss how threads, QObjects and events interact together; how a thread affinity of a QObject has a play in signals and slots connections; and how you can leverage the modern C++11 threading capabilities in your Qt application. Cross-platform thread support was introduced […]
Integrating OpenGL with Qt Quick 2 applications Part 1
This talk will introduce you to various effective strategies of drawing raw OpenGL content inside a Qt Quick 2 scene. After a brief introduction to how the Qt Quick 2 renderer works, we will see the APIs in Qt 5.6 that allow us to integrate existing OpenGL code and QML. One of the foundation pillars […]