04.03.2020 
The upcoming version of the C++ Standard (C++2a) is proposing to deprecate certain usages of the volatile keyword, by adopting the P1152 proposal (Deprecating volatile). Despite the somewhat “flamboyant” title, the actual deprecated parts are very limited and indeed the paper limits the deprecation to somehow language/library corner cases and/or dangerous antipatterns. For instance certain […]
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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 — […]
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 […]
QMacTouchBar has landed KDAB contributes the widget in QtMacExtras
KDAB has contributed QMacTouchBar to Qt, a widget in the QtMacExtras module, written by KDABian Christoph Schleifenbaum, which is already being used in some of KDAB’s own internal tools.
New in Qt 5.11: improvements to the model/view APIs (part 2) Automated validity checks using QAbstractItemModelTester
In the last episode of this series we discussed QAbstractItemModel::checkIndex(). QAbstractItemModel::checkIndex() is a function added in Qt 5.11 that allows developers of model classes to perform some validity checks on the QModelIndex objects passed to the model; specifically, on the indices passed to the APIs that model classes need to implement (rowCount(), columnCount(), data, setData(), […]
KDAB demos at Qt World Summit, Boston October 29th to 30th
KDAB is the main sponsor at Qt World Summit. In Boston, we’ll be co-hosting a training day on October 29th, offering both Introductory and Advanced one day training classes at a knock-down price. Find out more here. On October 30th, you can listen to two talks from KDAB experts: Creating compelling blended 2D/3D applications – a […]
KDAB at Qt Contributors' Summit June 11th and 12th, Norway
A major contributor to Qt, KDAB was glad to be a key sponsor at Qt Contributors’ Summit this June. About 80 committed developers met in Oslo to talk about the latest developments in the Qt framework, enjoying beautiful weather in Oslo, and of course, the coffee. The most important topics included the first early ideas […]
KDAB at Qt Contributor's Summit 2018, Oslo 11-12 June
KDAB is a major sponsor of this event and a key independent contributor to Qt as our blogs attest. Every year, dedicated Qt contributors gather at Qt Contributors’ Summit to share with their peers latest knowledge and best practices, ensuring that the Qt framework stays at the top of its game. Be a Contributor to […]
New in Qt 5.11: improvements to the model/view APIs (part 1)
The Qt model/view APIs are used throughout Qt — in Qt Widgets, in Qt Quick, as well as in other non-GUI code. As I tell my students when I deliver Qt trainings: mastering the usage of model/view classes and functions is mandatory knowledge, any non-trivial Qt application is going to be data-driven, with the data […]