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Concept
Qt (software)
Summary
Qt (pronounced "cute" or as an initialism) is free and open-source cross-platform software for creating graphical user interfaces as well as cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little or no change in the underlying codebase while still being a native application with native capabilities and speed.
Qt is currently being developed by The Qt Company, a publicly listed company, and the Qt Project under open-source governance, involving individual developers and organizations working to advance Qt. Qt is available under both commercial licenses and open-source GPL 2.0, GPL 3.0, and LGPL 3.0 licenses.
Qt is used for developing graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and some mobile or embedded platforms (iOS being the largest omission).
Most GUI programs created with Qt have a native-looking interface, in which case Qt is classified as a widget toolkit. Non-GUI programs can also be developed, such as command-line tools and consoles for servers. An example of such a non-GUI program using Qt is the Cutelyst web framework.
Qt supports various compilers, including the GCC C++ compiler, the Visual Studio suite, PHP via an extension for PHP5, and has extensive internationalization support. Qt also provides Qt Quick, that includes a declarative scripting language called QML that allows using JavaScript to provide the logic. With Qt Quick, rapid application development for mobile devices became possible, while logic can still be written with native code as well to achieve the best possible performance.
Other features include SQL database access, XML parsing, JSON parsing, thread management and network support.
Qt version history
The latest version of the Qt Framework is Qt 6.5 LTS which was released on April 3rd, 2023.
Also still supported, for commercial users, are 5.15 LTS, released on 26 May 2020, and 6.
Official source
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