"I have also done some last minute performance improvements with the help of KDAB Hotspot/perf, and I must say that the days of profiling with weird/huge perf command line options are gone, awesome tool!" Hotspot is a KDAB R&D project to create a standalone GUI for performance data. It is a replacement for perf report. […]

We are happy to announce the release of Qt Automotive Suite 2.0, the Qt solution for digital cockpits, developed in collaboration between KDAB, The Qt Company and Luxoft. The Qt Automotive Suite provides OEMs and Tier1s with powerful frameworks and tools to build a consistent user experience for both the instrument cluster and the center […]

The City Lights demo is an example of Qt 3D being put to novel use to implement a deferred rendering pipeline. With OpenGL, the number of lights you can show on a screen, also affecting objects in a scene, is limited by the need to use a forward renderer. Using Qt 3D, the geometry considerations […]

At the heart of every 3D application is geometry. Qt 3D-based 3D applications are no different and require the user to either generate geometry or provide asset files for Qt 3D to load. This blog post demonstrates how Blender and its Python API could be used to write an exporter that generates geometry for Qt […]

We have released version 2.9.0 of our Qt application introspection tool GammaRay. GammaRay allows you to observe behavior and data structures of Qt code inside your program live at runtime. GammaRay 2.9 introduces a number of new features interesting to Qt Quick, QWidgets, Qt 3D and non-graphical Qt users alike. Qt Quick One focus area […]

Today I want to share 13 mistakes regarding signals, slots and connect statements and how to find them at compile time with clazy, our open-source static-analyzer for Qt. Clazy is a compiler plugin which generates warnings related to Qt. You can read more about it in our previous blog posts: How to use static analysis […]

Some of you may know that KDAB employees enjoy flexibility on working hours as well as location, and some choose to work from home, with the opportunity to share childcare, do part-time study or simply enjoy an out-of-the-way location. All that's required is a decent bandwidth for KDAB work. About once a year, all of […]

Through their partnership, Qi and KDAB have developed imaging software to help researchers gain a deeper understanding of the progression of cancer on a cellular level, using Qt. Qi, KDAB and Qt have now taken their collaboration one step further by introducing nanoQuill, otherwise known as “The Coloring Book of Life,” which is a crowdsourced […]

So, last time we spoke, I left you this teaser... I mean how hard could it be? right? OK So, hum, an easy enough exercise..... for a path-based animation like we saw last time. But how do I draw such a path? How do I time the inflections in speed for that path, since time […]

This year Qt World Summit was held once more at the Berlin Congress Centre, in central Berlin and had over 1000 attendees – clear testimony to the growth of the Qt Community, as Qt enables our interfaces with the world in multiple areas, from medical to automotive, from gaming to industrial machinery, on desktop, mobile […]

Introduction In the previous article we gave an overview of the process for creating a custom aspect and showed how to create (most of) the front end functionality. In this article we shall continue building our custom aspect by implementing the corresponding backend types, registering the types and setting up communication from the frontend to […]

Linux perf is an immensely useful and powerful tool suite for profiling of C/C++ applications. I have used it extensively and successfully on various customer projects, both for desktop applications as well as automotive or industrial projects targeting low-end embedded Linux targets running on ARM hardware. The biggest problem with perf really is its usability, […]

KDAB has unique experience in porting the code base for toolkits like Qt 3, Qt 4, Motif, Java, Tcl, GTK, .NET, MFC, and Photon to Qt 5. Porting legacy GUI toolkits to Qt 5 is a job where proven experience saves a lot of time. In this presentation we highlight the main problems facing developers […]

Introduction Qt 3D has a flexible and extensible architecture that allows us to easily add our own new functionality to it without disrupting the existing features. The functionality of Qt 3D is divided among so-called aspects, each of which encapsulates a particular subject domain such as rendering, input, or animation. This short series of articles […]

Solving cancer is probably the biggest mystery that we see unravel in our life. This is a complex one because cancer is not a single disease, there are a myriad of aspects that need to be uncovered. Qi (Quantitive Imaging Systems) images biopsies from patients and then labels individual cells with over a hundred biomarkers. […]

Clazy is a clang plugin which extends the compiler with over 50 warnings related to Qt best practices ranging from unneeded memory allocations to API misuse. It's an opensource project spawned by KDAB's R&D efforts for better C++ tooling. Today, we're proud to announce a Clazy Web UI to view all warnings emitted by Clazy, […]

Close to three months after the initial hotspot release, I'm happy to announce the release of version 1.1.0. Quick recap: Hotspot is a graphical frontend to the Linux perf profiler suite. It allows you to visually analyze perf.data files with the built-in Flame Graph and the Bottom-Up, Top-Down, or Caller-Callee data tables. It is a […]

When Competence Center ISOBUS (CCI) decided to bring their terminal up-to-date as part of the Group’s strategy to remain top of the field in advanced agritechnical innovation, they asked KDAB to help. The user interface in the operator’s cab displays multiple applications. It can control complex agricultural tools, receive and display complex reports and much […]

We have released version 2.8.1 of our Qt application introspection tool GammaRay. This release contains a number of important bugfixes as well as support for Qt 5.9.2. Especially if you are experiencing corrupt views or crashes when searching in the object tree, or having trouble attaching to a process on Windows, you want to upgrade […]

Sometimes data visualization might call for more than a graph - you need to visualize complex data, such as that generated by city lighting, in three dimensions to get the full effect. KDAB decided to put together a showcase for the Qt World Summit that allowed us to demonstrate Qt 3D's capabilities as a performant […]