KDSoap is a tool for creating client applications for web services without the need for any further component such as a dedicated web server. KDSoap lets you interact with applications which have APIs that can be exported as SOAP objects. The web service then provides a machine-accessible interface to its functionality via HTTP. You can […]

KD Chart 2.6.0 is a maintenance release with a limited number of new features. This release publishes feature additions and bugfixes since KD Chart 2.5.1. KDAB continues to offer a commercial license without flat fee support for KD Chart. Features: - Code updated to compile with Qt 5.6 - Optional line breaking for horizontal legends […]

I'd like to start a new series of Qt on Android articles, these will be small articles which will focus on useful features that you'll need on Android but which don't have any Qt API (yet). I'll start with two pretty useful functions. These functions will help us to run C++ code directly on Android […]

Demonstrates the use of Qt 3D using the QML API to create a high quality, animated 3D visualisation application. The demo shows Qt 3D’s ability to use custom shaders that implement a metal-roughness physics based rendering (PBR) pipeline. The PBR shaders coupled with specially crafted material textures and environment maps gives a very realistic simulation […]

Back in November, Apple released the latest generation of it's Apple TV product. Besides the slightly improved hardware, the true new feature is the OS which is now officially based on iOS and comes with the dedicated SDK and App Store! So we started investigating what it would take to port Qt to tvOS and […]

In the last blog post we gave a very high level introduction to the Qt Quick 2 renderer. We also showed how various signals are emitted by the renderer during the synchronization and rendering steps. In this blog post we're going to discuss those signals and show how they can be used to implement overlays […]

We released a new major version of GammaRay, KDAB's Qt runtime introspection tool, in December 2015. Besides bringing you initial support for Qt 5.6, we focused on enhancing your productivity with large target applications. This includes various performance improvements such as a much faster object search, a new property editor that can dive into composite […]

What is GammaRay? For starters, it's a powerful electromagnetic wave, as well as a way to treat cancer. It’s also an under-appreciated German speed metal band. And it’s what gives Dr. Bruce Banner his big green alter ego. But Qt aficionados will know the GammaRay that we're talking about is an uber-powerful Qt debugger and […]

Holoplot UX - Example of modern user interface that could benefit from compressed textures. (KDAB designed UX, photo courtesy of Holoplot.) It’s every programmer’s worst nightmare. Your beautiful app is running at a snail’s pace, crippled by virtual memory swapping. Even worse, you’ve added one last bitmap resource, and suddenly unrelated chunks of the UX […]

If you’re already using QML in Qt, you know that it can help quickly create flexible user interfaces using little or no C++ programming. With a basic text file and some JavaScript logic, you can put together a pretty sophisticated interface like that shown in the Qt Quick Clock demo (below) with a minimum of […]

You want to build the cleanest code, the smartest code, the fastest code. You’re the alpha geek on your team, or maybe you aspire to be. You have an all-encompassing need to know. Let me introduce a new series we’re going to be running here on the KDAB blog. I’m Andy Gryc, and for the […]

The Qt World Summit was a rocking blast! More than 800 delegates, two days packed with sessions (and an additional training day presented by KDAB). Many old faces, lots of new ones, and a packed programme of sessions with terrific technical content. Yours truly also happened to give a talk, "Integrating OpenGL with Qt Quick […]

The latest release of KD Reports further enhances your ability to get printable and exportable reports from code and XML descriptions. For those who like using CMake instead of qmake, you'll be glad to know KD Reports now comes with a fully functioning CMake buildsystem (see INSTALL-cmake.txt). In addition, we have added Frame element and […]

It has been a few months since my last update about the Windows Embedded Compact (WEC) port of Qt. But as I promised last time, I have been working on the WEC2013 support for Qt. Not only because it's the new embedded platform from Microsoft, but also because Qt wants to adopt more C++11 in […]

It's usually said "only improve performance where a profiler tells you to". I don't completely agree. Take a big C++ library like Qt: can you profile all classes and all code paths ? It would take a couple of years to accomplish and analyse the results. It's expensive: It usually only happens if the speed-up […]

In the last episode of this blog series we learned about the overall concepts of input methods in Qt, with a look behind the scenes to see how a key press event from the native windowing system travels through the Qt input stack until it appears on screen inside a QLineEdit. In that context, the […]

Good news, everyone! Qt 5.5 has just been released! The release process of Qt 5.5 has been focused on stabilizing and improving performances. Once more KDAB is proud to be a part of the release, with its engineers constantly providing contributions and patches, as demonstrated by the commit graph of the last 16 weeks: In […]

In this projection demo a laptop takes care of communicating with the Android smartphone on one hand, and of displaying a QtQuick application which puts together all the information for projecting on the other hand. The information being displayed includes missed phone calls, emails, calendar, time, weather, etc. This information is retrieved on the Android […]

mPro (formerly Migari) is a comprehensive software system for the management, monitoring and automation of precision measurement systems in the context of quality control. It can integrate a wide variety of measurement hardware and buses and is programmable and extensible by the integrator and end user. This is necessary as such systems are generally custom […]

QNX CAR is a framework for building In-Vehicle Infotainment systems, including: the QNX OS a powerful mobile connectivity framework a best-in-class acoustic, noise reduction, and hands-free solution an HMI framework supporting HTML5, Qt, and other native UI toolsets. Using Qt5 on QNX, we created a mock-up of a modern interface for a sailing boat, to […]