Sometimes it’s useful to establish a connection between a signal and a slot that should be activated only once. This is not how signal/slot connections normally behave. Remember that, when a connection is established, it will stay active until: the connection is explicitly disconnected; or the sender object is destroyed; or the receiver object is […]
KDAB Blogs Get the RSS Feed
Stay up-to-date and get inspiration from KDAB’s expert insights into Qt, C++ and OpenGL development.
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.
Another day, another blog post about KDToolBox, KDAB’s collection of miscellaneous useful C++ classes and stuff. Today, we’ll talk about ways to throttle your signal/slots connections — in other words, how to activate a slot less often than the emission rate of the signal it’s connected to. The usual reason why you may want something […]
The event has been cancelled and will be integrated into our Qt DevCon event in June 2022. KDAB is bringing you another Qt Desktop Days this May! So, if you missed the first one that was held last September, or if you would like to attend a second, please join us May 19th-20th. That’s a […]
In the previous blog post about qHash, we explained: how to declare an overload of qHash for your own datatypes, how to hash Qt datatypes for which Qt does not provide a qHash overload, and why you can’t use a type from the Standard Library (or just another library) as a key in QHash (newsflash: […]
This brand new online conference hosted by KDAB offers in-depth technical topics from embedded developers for embedded developers – especially, but not exclusively, for those working with Qt on Embedded Devices. The call for papers is now closed and the program will be announced as soon as the committee has made a final selection. We […]
A long time ago, I wrote a post about creating custom shapes in Qt Quick, via the scene-graph APIs. That post covered defining suitable geometry to draw a part of a circle, known also as a ‘sector’, efficiently, since such sectors occur commonly in instrument and vehicle interfaces. I started writing the second part, about […]
Einleitung Der ESE Kongress ist die Leitveranstaltung für Embedded Software Engineering in Deutschland. In diesem Jahr fand er erstmals digital statt, so dass die Teilnahme auch per Video möglich war. An fünf Tagen gab es 3 Keynotes und 96 Fachvorträge aus allen Bereichen der Embedded Softwareentwicklung. Anton Kreuzkamp von KDAB sprach über maßgeschneidertes Code-Refactoring mit […]
Here, at KDAB, we get to spend 10% of our time on learning what we don’t know or practicing and improving what we already know. Recently, I decided to use that time to learn more about the Qt Quick Rendering Engine. The best way to do so, I found, is to use it in a […]
We’ve released KDDockWidgets 1.3.0! KDDockWidgets is a framework for custom-tailored docking systems in Qt. The main highlights for this release are PySide6 and experimental QtQuick support. The QtQuick backend isn’t production ready, but you can already build with -DKDDockWidgets_QTQUICK=ON, run the examples under examples/qtquick/dockwidgets/ and start reporting issues. Here’s the full list of changes: Experimental QtQuick […]
Another day, another blog about some of KDAB’s utility classes. Now it’s the turn of KDSingleApplication, a class that helps implement applications that follow the single-instance policy. What is a single-instance policy? Single-instance policy refers to those applications that want to spawn a unique instance for a given user session. Even when launched multiple times, […]