27.01.2020 
A few days ago Marc Mutz, colleague of mine at KDAB and also author in this blog, spotted this function from Qt’s source code (documentation): Apart from the mistake of considering empty strings not uppercase, which can be easily fixed, the loop in the body looks innocent enough. How would we figure out if a […]
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Fix Qt Creator code highlighting on Windows/MSVC projects how to configure your projects to get code highlighting and code navigation back
Have you ever noticed code highlighting disappearing in Qt Creator for some projects, without any apparent reason? Can’t get Ctrl+Click to work on any class name or function name anymore? Maybe you have ignored it at first, got used to it, and decided it’s just one of those things that just “happen sometimes”; or maybe […]
The Eight Rules of Multithreaded Qt The biggest dos and don'ts for multi-threading in Qt
While the concept of multithreading may be straightforward, code with threads is responsible for some wicked bugs, which can be nearly impossible to reproduce or track down. This makes writing bullet-proof code using threads a tall order. Let’s look a little deeper into why that is. First, you need better than average knowledge about the […]
UiWatchDog: a keepalive monitor for the GUI thread Part of the KDToolBox series
Continuing our blog series about KDToolBox, this time we will discuss UiWatchDog, a keepalive monitor for the GUI thread. Alive? A fundamental rule when writing applications in event-driven UI frameworks such as Qt is: do not ever block the GUI thread! The GUI thread is also usually called the main thread of the application — […]
NEW: Qt / QML introduction tutorial release
Today, we see more and more self-guided and remote learning via videos online. To that end, we have been working for more than 6 months now to capture our regular Qt/QML Introduction training on video.
unu – Using Qt on embedded Linux for an electric scooter UI
Right from the start, unu wanted to add a stylish, first-class embedded high-res display to their second generation electric scooter. Like many top-class engineering companies, unu didn’t have in-house expertise for building a modern UI, so they decided to partner with KDAB to build a modern UI based on Qt. In this video you learn […]
Introducing KDDockWidgets An advanced docking framework for Qt
KDDockWidgets is an effort by KDAB to provide an advanced docking system for Qt that QDockWidgets doesn't support. Features include: nesting dock widgets in a floating window, docking to any main window, tab bar with detachable tabs, inner customizable helper widgets.
Qt 3D Synchronisation Revisited
As mentioned in the previous article in this series, Qt 3D 5.14 is bringing a number of changes aimed at improving performance. Most people familiar with Qt 3D will know that the API is designed around the construction of a scene graph, creating a hierarchy of Entities, each of them having having any number of […]
Qt 3D: One too many threads or what has changed in 5.14
Qt 3D makes heavy use of threads, as a way to spread work across CPU cores and maximize throughput, but also to minimize the chances of blocking the main thread. Though nice on paper, the last case eventually leads to added complexity. Sometimes, there are just one too many threads. In the past, we’ve been […]
Qt for Android better than ever before What's new in Qt 5.14 for Android
As you already know KDAB is the largest independent contributor to Qt code. Of course we didn’t get lazy and we’ve added a lot of cool stuff to Qt 5.14. In this article I’m going to write about the super cool stuff that we’ve added to Qt 5.14 for Android. Android multi arch build in […]