29.04.2024 
Welcome to April’s Newsletter from KDAB It must be spring! Blogs are sprouting out all over 🌱 😊 We kick off with Part 3 of Mixing C++ and Rust for Fun and Profit, followed by Embedding the Servo Web Engine in Qt and Recursive Instantiation with Qt Quick and JSON. Then […]
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Hotspot v1.5.0 released The Linux perf GUI for Performance Analysis
Hotspot is a standalone GUI designed to provide a user-friendly interface for analyzing performance data. It takes a perf.data file, parses and evaluates its contents, and presents the results in a visually appealing and easily understandable manner. Our goal with Hotspot is to offer a modern alternative to perf report, making performance analysis on Linux […]
Recursive Instantiation with Qt Quick and JSON Factory Design Techniques - Part 1
Recently I was tasked to come up with an architecture for remote real time instantiation and updating of arbitrary QML components. This entry shows how you can use a simple variation of the factory method pattern in QML for instantiating arbitrary components. I’ve split my findings into 3 blog entries, each one covering a slightly […]
Embedding the Servo Web Engine in Qt Using CXX-Qt to integrate a web rendering engine written in Rust
With the Qt WebEngine module, Qt makes it possible to embed a webview component inside an otherwise native application. Under the hood, Qt WebEngine uses the Chromium browser engine, currently the de facto standard engine for such use cases. While the task of writing a brand new standard-compliant browser engine is infamous as being almost […]
Introducing the ConnectionEvaluator in KDBindings Control When Connections are Emitted
Managing the timing and context of signals and slots in multithreaded applications, especially those with a GUI, can be a complex task. The concept of deferred connection evaluation offers a nice and easy API, allowing for controlled and efficient signal-slot connections. This approach is particularly useful when dealing with worker threads and GUI threads. A […]
Reducing Visual Studio Installations with Toolchains
If you work on C++ projects on Windows that need to be built with multiple Visual Studio C++ compiler versions, you need some way to manage the installations of all these build environments. Either you have multiple IDEs installed, or you know about build tools (https://aka.ms/vs/17/release/vs_BuildTools.exe) and maybe keep only the latest full VS IDE […]
Meet KDAB at Embedded World 2024 – Hall 4-302 April 9-11th, Nürnberg, Germany
For the 14th time, KDAB exhibited at Embedded World – The meeting place for the global embedded community! Here, as expected, you got three days of pioneering technologies, solutions, new ideas, and intelligent concepts. Embedded World took place in Nürnberg, Germany from 9 – 11 April 2024 and the KDAB booth was in Hall 4-302 […]
Incredibly Simple QR Generation in QML Wrapping tiny JS libraries in QML to do quick and simple things effortlessly and elegantly.
The Need for Simple & Modular QR Generation in QML Recently, our designer Nuno Pinheiro needed to generate QR codes for an Android app in QML and started asking around about a simple way to do this. The best existing QML solution was QZXing, a Qt/QML wrapper for the 1D/2D barcode image processing library ZXing. […]
KDSoap 2.2.0 Released
We’re pleased to announce the release of KDSoap version 2.2.0, an update that brings new enhancements to improve both the general build system and client-side functionality. What is KDSoap? KDSoap, a SOAP (“Simple Object Access Protocol“) component rooted in Qt, serves as an essential tool for both client-side and server-side operations. Tailored for C++ programmers […]
Qt 6 WASM: Uploading & Playing Back Audio Files Adapting to the limitations of the web platform and Qt Multimedia
This article walks through an implementation using C++11 or later, Qt 6.5 or later for WebAssembly (multithreaded), and CMake. The browser environment used was Mozilla Firefox 119.0.1 (64-bit) provided by the Mozilla Firefox snap package for Ubuntu. Overview & Motivation Lately, I’ve been working on a small Qt Widgets project to help manage some weekly […]