Qt Blog

A Cross-Platform Rust UI Framework via Qt’s Bridging Technology

matthias.rauter@qt.io (Matthias Rauter) — Wed, 01 Jul 2026 14:15:22 GMT

Rust has achieved something extraordinary: it genuinely excites people to write software. But when it comes to building a real user interface, the ecosystem is still finding its footing. There are numerous options to pick your Rust UI framework from, including those gaining traction, like Iced and egui. Most of the available UI frameworks, however, are still establishing themselves in production environments and fall short in feature-richness. Qt Bridges, a bridging technology in public beta for Rust, brings something different to the table: over three decades of real-world use, commercial support, and a framework that already runs in automotive dashboards, medical devices, and industrial systems worldwide. Qt Bridge for Rust makes that maturity available to Rust developers, providing access to a UI framework that lets you keep your Rust codebase while using Qt Quick’s feature-rich UI libraries and APIs, hardware acceleration, and genuine cross-platform support.

Qt Bridges: Public Beta for the Rust Bridge Is Out!

matthias.rauter@qt.io (Matthias Rauter) — Wed, 01 Jul 2026 14:15:20 GMT

Qt Bridges is a project we have been developing since 2025 to bring Qt’s UI framework capabilities to other programming languages, without going through the full set of bindings. The focus is on the interaction with backend data objects, seamlessly integrated as QML components in a Qt Quick interface.

Introducing the Coco MCP Server Preview

James Vance — Tue, 30 Jun 2026 12:46:04 GMT

Authors: Otso Virtanen and James Vance

The Context Problem in Test Case Generation

Generating tests is one of the most common practical use cases for AI coding agents. However, without runtime code coverage data, an AI coding agent reasoning about test gaps must statically analyze source files and test files to infer what is likely covered. This is unreliable: the agent cannot distinguish between a function that is called indirectly through several layers and one that is never reached, nor can it detect dead code reliably.

Qt Canvas Painter: Accelerated performance using paths

kaj.gronholm@qtcompany.onmicrosoft.com (Kaj Grönholm) — Wed, 24 Jun 2026 05:54:24 GMT

For those who are not yet familiar with the new Qt Canvas Painter, please check the previous blog posts: Introduction, new features, and performance measurements. This blog post introduces paths and path groups to further improve the performance.

Qt Bridges: C# Bridge 0.3.0 Beta Released!

miguel.costa@qt.io (Miguel Costa) — Tue, 23 Jun 2026 12:16:01 GMT

Qt Bridges aim to bring Qt’s UI framework capabilities to commonly used programming languages, like C#, in a way that is familiar to developers using these languages. After the public Beta release, we've continued working on the C# bridge, adding new features and making improvements based on the feedback that we've received. Today we are announcing the release of a new Beta version 0.3.0, including some of these recent additions.

Learn how to start using Qt as your next C# UI framework, try it out, and send us your feedback.

A Cross-Platform C# UI Framework via Qt’s Bridging Technology

Cristian.Maureira-Fredes@qt.io (Cristián Maureira-Fredes) — Tue, 23 Jun 2026 11:00:00 GMT

Every C# UI framework comes with a familiar pattern: Windows-first, Linux absent, roadmap uncertain. WPF stalled, MAUI skipped Linux, WinUI 3 stays Windows-native. At the same time, demand for embedded Linux grows and C# teams feel the lack of good UI alternatives for C# on Linux. Qt Bridges, a bridging technology in public beta for C#, provides access to a UI framework that allows preserving your existing C# codebase while utilizing Qt Quick’s feature-rich UI libraries and APIs, hardware acceleration, and cross-platform capability.

Introducing the Qt Project CMake Skill for AI Agents

peter.schneider@qt.io (Peter Schneider) — Mon, 22 Jun 2026 11:41:33 GMT

The Challenge: CMake and Qt - Powerful Together, Tricky in Practice

The gap between “CMake that compiles” and “CMake that is correct” can be sometimes significant. CMake has been Qt’s official build system since Qt 6.0, and the pairing is genuinely capable: a well-configured Qt CMake project supports cross-platform builds, incremental QML compilation, seamless C++/QML integration, and deployment-ready install targets. But getting there requires mastering a build API that has evolved rapidly across Qt 6 minor releases - and that evolution is precisely where things can become challenging for Large Language Models, especially older or smaller models.

Qt Creator 20 and local AI

cristian.adam@qt.io (Cristian Adam) — Mon, 22 Jun 2026 11:10:54 GMT

Qt Creator 20 has become an Agent Client Protocol (ACP) Client extension. The protocol is supported by many AI providers and handles the details of the communication between the AI coding agent and the IDE.

Qt for Android Automotive 6.8.8 is released

bruno.vunderl@qt.io (Bruno Vunderl) — Fri, 19 Jun 2026 10:31:29 GMT

The latest patch release for Qt for Android Automotive 6.8.8 was just released. This release is based on Qt LTS 6.8.8 with around 660 bug fixes, security updates, and other improvements done to Qt base. There are no additional Qt for Android Automotive features delivered.

Qt Creator 20 released

eike.ziller@qt.io (Eike Ziller) — Wed, 17 Jun 2026 10:18:31 GMT

Release 20 of the Qt Creator IDE adds support for working with AI coding agents, a Zen Mode that puts your code editor into the focus, support for the GN (Generate Ninja) build system, and many more improvements.