# QSkinny: scene graph controls for C++ and QML applications > QSkinny is a C++ framework for lightweight controls built on Qt's scene graph and a limited set of Qt/Quick classes. It fits teams seeking native rendering and control logic, but its documentation and unfinished QML API require careful evaluation. **uwerat/qskinny** — A lightweight framework on top of the Qt scene graph and only few classes from Qt/Quick. It is usable from C++ and/or QML. - Repository: https://github.com/uwerat/qskinny - Stars: 1,668 · Forks: 321 - Language: C++ - License: not declared - Published: 2026-10-16 · Updated: 2026-10-16 · Language: en - Canonical page: https://hysenlabs.com/projects/uwerat-qskinny ## Why QSkinny uses Qt's scene graph QSkinny addresses applications that need interactive graphical controls without relying on the heavier object structures commonly associated with Qt/Quick. Its controls are implemented in C++ using Qt scene graph classes, with only a limited dependency on core Qt/Quick classes. The intended users are application developers who can work in C++, QML, or both. The central design choice is the separation of a control's API and logic, its styling, and the rendering delegated to the screen. This distinction matters because it lets the project define behavior independently from visual design and display output. Rather than treating appearance as an incidental property of a control, QSkinny makes styling an explicit part of its architecture. The README also describes QSkinny as a foundation for an automotive GUI with approximately 300,000 lines of pure C++. That statement describes the scope the maintainers associate with the project, not a general performance measurement. The design favors quick startup and low memory consumption because controls can be built from scene graph nodes instead of many stacked `QObject` or `QQuickItem` objects. The README does not publish comparative startup timings, memory figures, platform conditions, or benchmark procedures. Engineers evaluating those claims would need measurements from their own target applications. ## Separating control behavior, styling, and rendering The repository layout supports the architectural claims in the README. `src/` contains the implementation, `designsystems/` holds design-system content, `examples/` contains control and application examples, and `tools/` provides project tooling. Other directories such as `inputcontext/`, `qmlexport/`, and `support/` indicate that input handling, QML exposure, and support utilities receive distinct treatment in the source tree. This layout points to a control library rather than a single demonstration application. The examples include `buttons/`, `frames/`, `layouts/`, `tabview/`, `thumbnails/`, and `iotdashboard/`, plus specialized directories such as `desktop/`, `gallery/`, and `qvgviewer/`. These names show the range represented by the repository, but the README does not identify every example as a stable public API or define its support policy. The C++ API is intended to let application code use the same general implementation strategies as the controls. QSkinny can also expose controls to QML. That interface, however, stopped at a proof-of-concept state according to the README. As a result, the practical maturity differs by usage model. A C++ team can evaluate individual classes and examples, while a QML-first team must inspect the available exports rather than assuming parity with a complete QML controls library. The README does not document a migration path, API stabilization schedule, or compatibility policy between C++ and QML. ## Installing Qt and building the first QSkinny application The README sends readers to `doc/tutorials/03-writing-your-first-application.asciidoc` for build, install, and application instructions. It does not publish a standalone installation command in the README itself, so there is no confirmed package name, one-line installer, or copy-and-paste build sequence to reproduce here. The repository includes a top-level `CMakeLists.txt` and `examples/CMakeLists.txt`, which establish CMake as the visible build entry point. A first use therefore starts with the tutorial, followed by one of the example projects relevant to the application. The reader should expect to select a supported Qt installation and follow the tutorial's exact project configuration, build, and execution steps. Inventing a command here would risk pointing CMake at an undocumented directory or using a configuration flag that the project does not define. Qt version selection is the first explicit constraint. The README identifies Qt 5.15, the current long-term-supported version it names as Qt 6.8.x, and the current Qt version. It says QSkinny should run on platforms supported by Qt/Quick, while also stating that other Qt versions might work. That is a support boundary rather than permission to treat every Qt release as compatible. Before building, confirm the exact tutorial procedure, choose the required Qt version, and identify whether the application will use QSkinny through C++ or through its unfinished QML interface. ## Recent repository activity and unfinished public surfaces The repository is not archived, and its last push was on 2026-08-25. This supports the conclusion that repository activity continued recently. It does not establish the frequency of releases, the stability of the public API, or the responsiveness of maintainers. The GitHub repository has no GitHub releases, so the project has no release history visible through that mechanism. The README explicitly acknowledges two maintenance limitations. It says QSkinny lacks documentation in some areas, and it states that the QML API was not completed after reaching proof-of-concept status. Those are project-specific limitations. Recent pushes can coexist with incomplete interfaces and thin documentation, so the last-push date should not be interpreted as evidence that every part of the framework has reached production maturity. Upgrade planning is also constrained by missing public guidance. The README does not document release notes, version compatibility between QSkinny releases, migration procedures, deprecation policy, or a supported rollback process. It links to a tutorial and offers a support email for project-specific direction, but that is not a substitute for documented upgrade compatibility. A team using QSkinny beyond an evaluation should establish which repository revision it builds and preserve the associated tutorial, examples, Qt version, and design-system files. ## QSkinny license implications for adopters The README states that QSkinny is licensed under the BSD 3 Clause License. It also says the project is willing to offer other licenses on request. Contributions require acceptance of a Contributor Agreement before a pull request proceeds through licensing checks. These terms matter to organizations that need a consistent license across C++ source, examples, design-system assets, and contributions. The repository contains a `LICENSES` directory, so integrators should inspect that directory alongside the README before distributing a build. The README does not enumerate the contents of `LICENSES`, identify exceptions for individual files, or explain the licensing attached to third-party dependencies. It also does not provide legal analysis, so this article cannot determine how the terms affect a particular product or distribution model. The Contributor Agreement applies to contributors according to the README. It should be reviewed before submitting a patch, especially if a company owns relevant intellectual property or requires review of contribution terms. For adoption, the concrete verification point is the actual license files present in the revision being built, not just the README's summary. ## Where QSkinny differs from conventional Qt Quick controls QSkinny's real alternative is the conventional Qt Quick object model built around `QObject` and `QQuickItem`, including the wider set of standard Qt Quick components. QSkinny deliberately constructs controls from scene graph nodes and uses fewer Qt/Quick core classes. Its README presents that as a lighter implementation, with particular appeal to applications where control count and object overhead matter. Conventional Qt Quick development offers a broader and more familiar component context, but QSkinny changes the rendering and ownership model rather than merely supplying another skin over standard items. That can benefit C++ teams seeking direct scene graph construction. It also means developers must understand QSkinny's own APIs, styling model, and rendering nodes instead of treating it as a drop-in QML widget set. The trade-off becomes clearest for QML-first projects. The README confirms that QSkinny can be used from QML, yet it also confirms that the QML API remains incomplete. A team requiring broad QML coverage should compare its exact control requirements against the actual QML-export implementation. A C++ team with specialized rendering needs may find the architectural separation more relevant, provided it accepts the documentation gaps and evaluates the project against its own startup and memory constraints. ## Conclusion QSkinny is appropriate for C++ developers building Qt Quick applications that need a scene-graph-based controls layer and accept responsibility for evaluating its documented Qt versions, build process, styling model, and incomplete QML surface. It is less suitable for teams whose main requirement is a mature QML control API or comprehensive public documentation. Before adoption, inspect `doc/tutorials/03-writing-your-first-application.asciidoc` and confirm that the required controls, styling files, deployment targets, and C++ integration points are covered. ## FAQ ### What is QSkinny used for? QSkinny is a lightweight framework for creating controls on top of Qt's scene graph and a limited set of Qt/Quick classes. It can be used from C++, QML, or both. ### Which Qt versions does QSkinny support? The README identifies Qt 5.15, the current long-term-supported version it describes as Qt 6.8.x, and the current Qt version. It says other Qt versions might be supported but does not guarantee them. ### Is QSkinny's QML API complete? No. The README states that the QML API stopped at a proof-of-concept state and has not been completed. ## Sources - [Issues](https://github.com/uwerat/qskinny/issues) - [README](https://github.com/uwerat/qskinny/blob/master/README.md) - [uwerat/qskinny on GitHub](https://github.com/uwerat/qskinny) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/uwerat-qskinny