20.05.2022 
After two years of frustration and delays, Embedded World is finally back and KDAB will be there at the Qt booth, number 258 in Hall 4. As usual we’ll be showing some great demos – updates to some golden oldies, and some brand new ones. Get your free ticket here and come and check them […]
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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.
Structured Bindings with Qt SQL
Some time ago, I wrote a post about integrating Qt’s associative containers with the fancy new C++ features, range-based for loops with structured bindings. That post inspired KDAB’s own Giuseppe D’Angelo to add the asKeyValueRange member function to both QHash and QMap. Now it’s possible to iterate over them with a simple range-based for loop, […]
Say No to Qt Style Sheets Making the Right Choice Between QStyle and Qt Style Sheets, Upfront
You have two choices when it comes to giving a custom style to your Qt widgets. Qt Style Sheets are very convenient for getting started — just a few CSS-like rules, and they work. It is our experience, however, that Qt Style Sheets create too much trouble and a QStyle subclass (*) gives a better […]
JSONify All Things Extending the nlohmann/json Library
The nlohmann/json library is everything a developer can expect from a modern library — easy to integrate and JSON objects are treated as first class citizens with a very intuitive API. However, it has one problem that is widely mentioned across the internet, which I’ll tell you about below. Various solutions to the problem have […]
C++23 Will Be Really Awesome (a blog for April Fools Day)
C++23 is feature complete and on track to be released next year. While many people are complaining that it’s, after all, a “minor” release (as the pandemic made the Committee work very difficult), C++23 still has a few very significant changes. In this blog post, I want to talk about what I think is my […]
The Qt Less Traveled Fixing Bugs in Qt's Lesser-used Features, for Profit (and fun!)
Qt is a high quality library, but it is also massive in number of features. This massive number results in a higher likelihood that there are bugs that go unnoticed lying around in its less frequently used features or combination of features. Our friends at qgis.org hired us to solve some of those issues that had […]
CXX-Qt Safe Rust Bindings for Qt
At KDAB, we have been investigating how to integrate Rust with Qt in a safe and idiomatic way. The solution we are currently working on is called CXX-Qt. It’s available in the GitHub and on crates.io. This blog post discusses the journey of CXX-Qt — where it started, where it can be used right now, […]
Qt Allstack II – Adding Firebase
A couple of weeks ago, we guided you through setting up a chat application and server in our first blog of this series. This is the second and final blog of this Qt Allstack series. Firebase Messaging Now that we have a functional chat application, it’s time to add real world features, like push notifications. […]
Qt Allstack I – Setup Creating a Realtime Mobile Chat App
Writing mobile apps can be a lot of fun, especially with Qt and QML. But if your background is all about C++ and Qt, writing the entire required stack for a mobile app can be challenging. Adding push notifications, storing information, and having to write that with another language and framework might make you give […]
Loose Coupling with Signals & Slots Connecting (Almost) Any Function to a Signal
Here at KDAB, we recently published a library called KDBindings, which aims to reimplement both Qt signals and slots and data binding in pure C++17. To get an introduction to the KDBindings implementation of signals and slots, I recommend that you take a look at the KDBindings Getting Started Guide. It will give you an […]