30.09.2019 
With this blog post we are going to kickstart our brand new blog series about KDToolBox. The first class we’re exploring is KDTableToListProxyModel, a table-to-list proxy model. The main use case for KDTableToListProxyModel is exposing tabular models to Qt Quick. Qt Quick has a certain number of “view” elements that only support list models: for […]
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Introducing KDToolBox KDAB R&D contribution of useful C++ classes
At KDAB we invest a significant amount of efforts in research and development. We are always looking for new tooling, libraries and utilities that can make our job easier and improve the C++ and Qt ecosystems. Ultimately, the gained knowledge and skills make our customers happier. As part of this process we develop lots of […]
Little Trouble in Big Data – Part 3 Dealing with resource bottlenecks
In the previous two blogs in this series I showed how solving an apparently simple problem about loading a lot of data into RAM using mmap() also turned out to require a solution that improved CPU use across cores. In this blog, I’ll show how we dealt with the bottleneck problems that ensued, and finally, […]
3D – Interactions with Qt, KUESA and Qt Design Studio, Part 2
In my last post, I went through a method of creating a simulated reflection with a simple scene. This time I’d like to take the technique and apply it to something a bit more realistic. I have a model of a car that I’d like to show off in KUESA™, and as we know, KUESA […]
Python binding for Kuesa Load, render and manipulate glTF models in your python application using Qt 3D
KUESA™ is a Qt module designed to load, render and manipulate glTF 2.0 models in applications using Qt 3D. Kuesa provides a C++ and a QML API which makes it easy to do things like triggering animations contained in the glTF files, finding camera details defined by the designer, etc. It is a great tool so […]
GammaRay 2.11.0 Release
We have released version 2.11.0 of our Qt application monitoring tool GammaRay. GammaRay allows you to observe behavior and data structures of Qt code inside your program live at runtime. GammaRay 2.11 comes with a new inspection tool for Qt’s event handling, providing even more insights into the inner working of your application. Besides looking […]
Little Trouble in Big Data – Part 2 improving CPU utilization across cores
In Part 1 of this series we solved the problem of using mmap() to load large set of data into RAM all at once. The catch was that it still took too long. In this blog, I describe how we solve this.
KDAB at SIGGRAPH – 2019 July 28 - Aug 1, Los Angeles
KDAB is sharing the Qt booth at SIGGRAPH in Los Angeles. We’ll be showing some of our profiling and debugging tools as well as our latest QiTissue demo, a desktop Application developed for Quantitative Imaging Systems (Qi) to help cancer researchers efficiently handle gigabytes of data (see more about that here), We’ll also give a preview […]
3D – Interactions with Qt, KUESA and Qt Design Studio, Part 1 how to create a reflection with minimal computational effort
Neither KUESA or Qt 3D Studio will give free reflections. If you know about 3D, you know it requires ray tracing software, not OpenGL. So, I wondered if there would be an easy way to create this effect.
Little Trouble in Big Data – Part 1 how to use mmap() to load a large data set into RAM
We got a call from a bioinformatics group at a European university. The problem appeared simple, how to usemmap() to load a large data set into RAM all at once. OK, no problem I thought...