Qt (framework)
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GUI designing in Qt Creator using the embedded Qt Designer
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| Original author(s) | Haavard Nord and Eirik Chambe-Eng |
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| Initial release | 20 May 1995 |
| Stable release | 5.8 (January 23, 2017) |
| Repository | code |
| Development status | Active |
| Written in | C++ |
| Operating system | Android, iOS, Linux (Embedded, , X11), macOS, Windows, Windows Phone, … |
| Platform | Cross-platform |
| Type | Application framework |
| License |
Qt Commercial License GPL 2.0, 3.0 LGPL 3.0 |
| Website | www |
Qt (/kjuːt/ "cute",) is a cross-platform application framework that is used for developing application software that can be run on various software and hardware platforms 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 both by The Qt Company, a company listed on the Nasdaq Helsinki Stock Exchange, and the Qt Project under open-source governance, involving individual developers and firms working to advance Qt. Qt is available with both commercial and open sourceGPL 2.0, GPL 3.0, and LGPL 3.0 licenses.
Qt is used for developing multi-platform applications and graphical user interfaces (GUIs); however, programs without a GUI can be developed, such as command-line tools and consoles for servers. An example of a non-GUI program using Qt is the Cutelyst web framework. GUI programs created with Qt can have a native-looking interface, in which case Qt is classified as a widget toolkit.
Qt uses standard C++ with extensions including signals and slots that simplify handling of events, and this helps in development of both GUI and server applications which receive their own set of event information and should process them accordingly. Qt supports many compilers, including the GCC C++ compiler and the Visual Studio suite. 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, although logic can be written with native code as well to achieve the best possible performance. Qt can be used in several other programming languages via language bindings. It runs on the major desktop platforms and some of the mobile platforms. It has extensive internationalization support. Non-GUI features include SQL database access, XML parsing, JSON parsing, thread management and network support.
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