Some time ago, I wrote about how to build C++ projects with ASAN on Windows. Now, if you happen to deal with Qt projects you may want to take this one step further and sanitize Qt itself. Why bother with a sanitized Qt build? Let's have a closer look on why having a sanitized Qt […]

With Qt 6 well on its way, it's about time we go over some of the internal changes and optimizations made to Qt 3D for the upcoming release. In a separate article, my colleague Mike Krus has already highlighted the API changes we've made in Qt 3D for Qt 6. This post will dive into […]

Overview Qt 6 is nearly upon us. While this has not been addressed by other publications, Qt 3D is also introducing a number of changes with this major release. This includes changes in the public API that will bring a number of new features and many internal changes to improve performance and leverage new, low-level […]

KDAB has released KD Reports 1.9.0! KD Reports is a developer tool that generates printable and exportable reports from code and from XML descriptions. Reports may contain text paragraphs, tables, headlines, charts, headers and footers and more. Starting with this release, 1.9.0, KD Reports no longer supports Qt 4. However, KD Reports 1.8.2 and lower […]

KDAB has been working closely together with unu to create the dashboard application for their next-generation of electric scooters. You can find out about these affordable, innovative, urban transport solutions and book a test ride here. unu is now launching the scooters. So in this blog post, we will have a look at some of […]

If you’ve read the first article in this series, you’ll know what full stack tracing is and why you definitely want it. This time, we’ll show you how to setup full stack tracing on your Linux system. There are two steps – first get everything configured to capture a trace, and then view and interpret […]

KDAB has released KD Chart 2.7.2, the final release in the KD Chart 2.7 series. This is a very minor release; however, it's significant in that it may be the final release of KD Chart that will support Qt 4. KD Chart is a comprehensive business charting package with many different chart types and a […]

We've just released version 1.8.2 of our developer tool, KD Reports. KD Reports generates printable and exportable reports from code and from XML descriptions. Reports may contain text paragraphs, tables, headlines, charts, headers and footers and more. Version 1.8.2 is planned to be the final release in the 1.8 series of KD Reports. KD Reports […]

A few days ago, a customer using our KD Soap library reported an interesting problem with it. The library worked perfectly to access the SOAP server, but there was some noticeable latency when doing a series of requests in short succession from the client. This latency should not have been there, as both the server […]

We have released KDSoap 1.9.1 As part of our commitment to cross-platform solutions, KDAB offers developers KD SOAP, a web service access package for Qt applications. KD Soap 1.9.1 This is a final release in this series, with just a few small changes to ensure continued support for those who want to keep using Qt4. […]

Full stack tracing is a tool that should be part of every software engineer’s toolkit. It's the best way to investigate and solve certain classes of hard problems in optimization and debugging. Because of the power and capability it gives the developer, we’ll be writing a series of blogs about it: when to use it, […]

We are happy to let you know that the very first edition of Qt Desktop Days 2020 was a great success! Having pulled together the event at very short notice, we were delighted at the enthusiastic response from contributors and attendees alike. Over 500 registered attendees could enjoy five days of technical talks. The program […]

Memory bugs are tricky. Leaks have a clear impact on performance, and quickly become hard to spot when heap allocated objects move too much. Memory access bugs, on the other hand, make your program crash right away, if you're lucky. In less desirable cases, they may end up corrupting random objects on the heap, and […]

We have just released version 1.2.0 of Heaptrack, the fast heap memory profiler for C++/Linux applications. A bit of Background The Heaptrack fast heap memory profiler allows you to track all heap memory allocations at run-time. Afterwards, you can use the accompanying GUI tool to find optimization opportunities in your code by analyzing the recorded […]

We are pleased to announce a new release of our Hotspot Linux perf performance analysis GUI, Hotspot version 1.3.0! Hotspot is a replacement for perf reportthat takes a perf.data file, parses and evaluates its contents, and then displays the result in a graphical form. You can read a bit more about Hotspot here. Overview of […]

Python is a handy all-purpose language. It can make you very productive within a short time period and has powerful expressiveness for data manipulation and processing. Yet, it's not a great fit for lots of tasks. C++ is far better at achieving anything that needs bare metal performance, deterministic timing, or low-level access. Thankfully, some […]

This is the story of a bug in an open-source project I maintain; as the maintainer I review and sometimes fix bug reports from the community. Last week, a user reported that the 'File' menu of the application was not appearing on macOS. Some investigation showed this didn't happen when using the default translation (i.e […]

TL;DR: If you choose a default translation in your Qt application based on a locale name like this: then please change it to: Some of your users (me!) will be thankful that your application appears in the same language as the rest of their system. Background I'm a Polish guy working with computers, mostly on […]

Part 3 If you are here from Part 1, you missed Part 2, somehow. You have tried everything from the first two parts that seemed applicable, and your screen is still a window to the void? No problem: we’ve gathered another five reasons this could be happening and how to go about fixing them. Issue […]

Today's blog post is about something that should be simple and apparently it causes trouble: how to declare a qHash overload for a custom datatype. This is necessary when we want to use custom datatypes as keys in a QHash. From the documentation: A QHash's key type has additional requirements other than being an assignable […]