![]() | |
Screenshot ![]() GUI designing in Qt Creator using the embedded Qt Designer on Windows 10 | |
Original author(s) | Haavard Nord and Eirik Chambe-Eng[1] |
---|---|
Developer(s) |
|
Initial release | 20 May 1995[1] |
Stable release | 6.7.2[2] ![]() |
Repository | |
Written in | C++ (C++17) |
Operating system | Android, iOS, Linux (embedded, Wayland, X11), macOS, Microsoft Windows, WebAssembly, ...[3] |
Platform | Cross-platform |
Type | Cross-platform software and Software development tools |
License | |
Website | www |
Qt (pronounced "cute"[7][8] or as an initialism) is cross-platform application development framework 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.[9][10][11] Qt is available under both commercial licenses[4] and open-source[12] GPL 2.0, GPL 3.0, and LGPL 3.0 licenses.[5][6]
Purposes and abilities[edit]
Qt is used for developing graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and mobile or embedded platforms. 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.[13]
Qt supports various C++ compilers, including the GCC and Clang C++ compilers and the Visual Studio suite. It supports other languages with bindings or extensions, such as Python via Python bindings[14] and PHP via an extension for PHP5,[15] 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.
Releases[edit]
The latest version of the Qt Framework is Qt 6.7, which was released on April 2, 2024.
Also still supported are — for commercial users — 6.5 LTS, released on April 3, 2023, 6.2 LTS,[16] released on 30 September 2021, and 5.15 LTS, released on 26 May 2020 – long-term support (LTS) versions are generally supported for three years with a commercial license, while 5.15 support was extended to five years for subscription license holders, and so it is supported until 26 May 2025. Additionally the KDE project provides unofficial support for, at least, Qt 5.15, i.e. not just for commercial users.
Qt in use[edit]
In 2017, the Qt Company estimated a community of about 1 million developers worldwide[17] in over 70 industries.[18]
Desktop UIs[edit]
![](https://upload.wikimedia.org/wikipedia/commons/thumb/6/63/KDE_Mascot_Konqi_for_Qt.png/220px-KDE_Mascot_Konqi_for_Qt.png)
Graphical user-interfaces and desktop environments that utilize Qt/QML as widget toolkit:
- KDE Plasma, a libre desktop environment for various computing devices[19]
- DDE (Deepin Desktop Environment) of Linux Deepin[20][21]
- UKUI (Ubuntu Kylin User Interface)[22]
- CutefishDE, a desktop environment built with Qt Quick and essential KDE frameworks [23]
- LXQt (Lightweight X11 Desktop Environment)
- Lumina, a desktop environment designed for BSD-based TrueOS[24]
- Lomiri (formerly Unity8),[25] a convergent desktop environment started by Canonical, maintained by Ubports[26]
- Maui Shell, a DE that also features their own app suite[27]
- Unity 2D, a desktop shell written in Qt and Qml
- Trinity DE, a continuously developed fork based on KDE3[28]
- SDDM, a display manager written in QML that is compatible with X11 and Wayland.
Embedded and mobile UIs[edit]
- Actively developed or maintained
- AsteroidOS, an open source operating system designed for smartwatches
- Avionics, Panasonic's in-flight entertainment system[29][30]
- Sailfish OS, a mobile operating system developed by Jolla
- Plasma Mobile, a touch-based GUI developed by KDE
- LuneOS, community-driven successor for Palm/HP webOS
- Nemo Mobile, based on Mer
- Lomiri, formerly known as Unity8, a phone UI developed by Ubports, originally by Canonical
- Tesla Model S in-car UI[31]
- webOS, a multitask operating system from LG for smart devices like TVs and smartwatches
- Sky Q, the home entertainment system of Sky plc[32]
- Available, but inactive
Applications using Qt[edit]
Many notable open-source or proprietary cross-platform software are using Qt or QML:
- 010 Editor, a commercial hex editor and text editor for Microsoft Windows, Linux and macOS.
- Ableton Live
- Adobe Photoshop Album[33]
- Adobe Photoshop Elements[34]
- AMD's Radeon Software Crimson Edition driver tool application.[35]
- Audacious, a music player for Linux, Microsoft Windows, and other Unix-like operating systems.
- Autodesk Maya[36]
- Autodesk 3ds Max[37]
- Bitcoin Core, the reference bitcoin implementation. Most bitcoin forks also provide the reference GUI.
- Calibre, ebook collection application[38]
- Celestia, real-time 3D simulator of the entire known universe (Qt only available with v1.7.0)
- CryEngine V editor[39]
- DaVinci Resolve, a video editor
- Dogecoin Core[40] community-driven cryptocurrency software.
- Dolphin (emulator), an emulator for the Wii and GameCube
- Dorico notation software
- Dragonframe[41] stop motion animation software
- EAGLE by CadSoft Computer / Autodesk, an EDA application with schematic capture, PCB layout, auto-router and CAM features
- FreeCAD, free open source parametric 3D CAD modeler
- FreeMat free open source numerical computing environment
- Gambas free open source BASIC integrated development environment
- GCompris free educational suite for children
- Google Earth[42]
- GPlates, a plate tectonics visualisation software
- Igor Pro, a data analysis software
- Krita graphics editing and digital painting software[43]
- LMMS, a cross-platform music production software
- Mathematica, a mathematical symbolic computation program, sometimes termed a computer algebra system or program, used in many scientific, engineering, mathematical, and computing fields.[44]
- Monero, a privacy-focused cryptocurrency, implements its official desktop wallet software using Qt.[45]
- MuseScore, an open-source, multiplatform notation software
- OBS, a libre cross-platform screencast software
- Orange data mining suite[46]
- ParaView open-source cross-platform application for interactive, scientific visualization[47]
- PCSX2, a free and open-source cross-platform Playstation 2 emulator
- qBittorrent cross-platform free and open-source BitTorrent client[48]
- QGIS geographic information system[49]
- Qtractor Audio multitrack recorder and editing software
- QuiteRSS Feed Reader
- Retroshare F2F communication platform
- Roblox Studio a game creation tool used on the Roblox platform
- Scribus desktop publishing software[50]
- Sibelius music composition and notation software[51]
- SoulseekQT, a P2P file-sharing client[52]
- Source 2 engine tools[53] a 3D video game engine developed by Valve
- Spyder, a Python IDE
- Stellarium, a planetarium program
- Subsurface, a software for logging and planning scuba dives initially designed and developed by Linus Torvalds[54]
- SuperCollider, an environment and programming language for real-time audio synthesis and algorithmic composition
- Synergy, a software application for sharing a keyboard and mouse between multiple computers
- Teamviewer, a computer software package for remote control, desktop sharing, online meetings, web conferencing and file transfer between computers[55]
- Telegram, a messaging client available for Windows, Mac and Linux[56]
- VirtualBox OS virtualization software[57]
- VLC media player[58]
- Wireshark, a packet analyzer[59]
- WPS Office[60]
- XaoS, a real-time fractal zoomer
- XnView MP[61]
Organizations using Qt[edit]
Qt is utilized by a wide range of companies and organizations such as
- AMD[62]
- Blizzard Entertainment[63]
- BMW[64]
- Crytek[39]
- Daimler AG[65][66]
- DreamWorks[67][68]
- Electronic Arts[69]
- European Space Agency[70]
- German Air Traffic Control[71]
- HP[72]
- LG[73]
- Lucasfilm[74][75]
- Microsoft[76]
- Panasonic[77]
- Philips[78]
- Robert Bosch GmbH[79]
- Samsung[80]
- Siemens[81]
- Tesla[82]
- Tomtom[83]
- Valve[84]
- Volvo[85]
- Walt Disney Animation Studios[86]
Qt software architecture[edit]
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Free_and_open-source-software_display_servers_and_UI_toolkits.svg/300px-Free_and_open-source-software_display_servers_and_UI_toolkits.svg.png)
Qt concepts[edit]
Qt is built on these key concepts:
- Complete abstraction of the GUI
- When first released, Qt used its own paint engine and controls, emulating the look of the different platforms it runs on when it drew its widgets. This made the porting work easier because very few classes in Qt really depended on the target platform; however, this occasionally led to slight discrepancies where that emulation was imperfect. Recent versions of Qt use the native style APIs of the different platforms, on platforms that have a native widget set, to query metrics and draw most controls, and do not suffer from such issues as often.[87] On some platforms (such as MeeGo and KDE) Qt is the native API. Some other portable graphical toolkits have made different design decisions; for example, wxWidgets uses the toolkits of the target platform for its implementations.
- Signals and slots
- A language construct introduced in Qt for communication between objects[88] which makes it easy to implement the observer pattern while avoiding boilerplate code. The concept is that GUI widgets can send signals containing event information which can be received by other controls using special functions known as slots.
- Metaobject compiler
- The metaobject compiler, termed moc, is a tool that is run on the sources of a Qt program. It interprets certain macros from the C++ code as annotations, and uses them to generate added C++ code with meta information about the classes used in the program. This meta information is used by Qt to provide programming features not available natively in C++: signals and slots, introspection and asynchronous function calls.
- Language bindings
- Qt can be used in several programming languages other than C++, such as Python, Javascript, C# and Rust[89] via language bindings; many languages have bindings for Qt 5 and bindings for Qt 4.
Qt modules[edit]
Starting with Qt 4.0 the framework was split into individual modules.[90][91] With Qt 5.0 the architecture was modularized even further.[92][93] Qt is now split into essential and add-on modules.[94]
Qt essentials[edit]
Module | Description |
---|---|
Qt Core | The only required Qt module, containing classes used by other modules, including the meta-object system, concurrency and threading, containers, event system, plugins and I/O facilities. |
Qt GUI | The central GUI module. In Qt 5 this module now depends on OpenGL, but no longer contains any widget classes. |
Qt Widgets | Contains classes for classic widget based GUI applications and the QSceneGraph classes. Was split off from QtGui in Qt 5. |
Qt QML | Module for QML and JavaScript languages. |
Qt Quick | The module for GUI applications written using QML2. |
Qt Quick Controls | Widget like controls for Qt Quick intended mainly for desktop applications. |
Qt Quick Layouts | Layouts for arranging items in Qt Quick. |
Qt Network | Network abstraction layer. Complete with support for TCP, UDP, HTTP, TLS, SSL (in Qt 4) and SPDY (since Qt 5.3). |
Qt Multimedia | Classes for audio, video, radio and camera functionality. |
Qt Multimedia Widgets | The widgets from Qt Multimedia. |
Qt SQL | Contains classes for database integration using SQL. |
Qt WebEngine | A new set of Qt Widget and QML webview APIs based on Chromium. |
Qt Test | Classes for unit testing Qt applications and libraries. |
Qt add-ons[edit]
Module | Description |
---|---|
Active Qt | Classes for applications which use ActiveX. |
Qt Charts | Provides functionality and widgets to plot charts of many kinds |
Qt Bluetooth | Classes accessing Bluetooth hardware. |
Qt D-Bus | Classes for IPC using the D-Bus protocol. |
Qt NFC | Classes accessing NFC hardware. Only officially supported on BlackBerry hardware so far (or N9 in the MeeGo port). |
Qt OpenGL | Legacy module containing the OpenGL classes from Qt 4. In Qt 5 the similar functionality in Qt GUI is recommended. |
Qt Location | Classes for accessing GPS and other location services and for mapping and navigation. Split off from the Qt 4 Mobility module of Qt Location. Supported on Android, BlackBerry, iOS, Linux (using GeoClue), Windows and Sailfish OS. |
Qt Quick 3D | Classes for rendering 3D models, video games, simulations and 3D user interfaces, with a Qt QML API, into a mixed 2D and 3D scene graph. |
Qt Script | Legacy module for scripting Qt application using ECMAScript/JavaScript. In Qt 5, using similar classes in Qt QML is recommended. |
Qt Sensors | Classes for accessing various mobile hardware sensors. Used to be part of Qt Mobile in Qt 4. Supported on Android, BlackBerry, iOS, WinRT, Mer and Linux. |
Qt Serial Port | Classes for access to hardware and virtual serial ports. Supported on Windows, Linux and macOS. |
Qt WebChannel | Provides access to Qt objects to HTML/Js over WebSockets. |
Qt WebKit | Qt's WebKit implementation and API. |
Qt WebKit Widgets | The widget API for Qt WebKit |
Qt WebSockets | Provides a WebSocket implementation. |
Qt XML | Legacy module containing classes for SAX and DOM style XML APIs. Replaced with QXmlStreamReader and QXmlStreamWriter classes in Qt Core. |
Qt XML Patterns | Support for XPath, XQuery, XSLT and XML Schema validation. |
Editions[edit]
There are four editions of Qt available: Community, Indie Mobile, Professional and Enterprise.[95] The Community version is under the open source licenses, while the Indie Mobile, Professional and Enterprise versions, which contain additional functionality and libraries, e.g. Enterprise Controls[95] are commercially sold by The Qt Company.
Supported platforms[edit]
Qt works on many different platforms; the following are officially supported:
Platform | Description |
---|---|
Linux/Unix | |
X11 | Qt for X Window System (Linux);[96] FreeBSD, NetBSD, OpenBSD, and DragonFly BSD have community support. |
Wayland | Qt applications can switch between graphical backends like X and Wayland at load time with the -platform command line option.[97][98] This allows a seamless transition of Qt applications from X11 to Wayland. SailfishOS uses Wayland only as it does not have X11.[99] |
Android | Qt for Android[100] (formerly known as Necessitas).[101] |
Embedded Linux | Qt for embedded platforms: personal digital assistant, smartphone, etc.[102] Exists as multiple platforms depending on display technology. DirectFB, LinuxFB and EGLFS (EGL Full Screen). |
Microsoft platforms | |
Windows | Qt for Microsoft Windows 7,[103] 8 and 10[104] |
Windows RT | Support for WinRT-based Windows 10 Mobile apps and Windows 10 IoT[105] |
Apple platforms | |
macOS | Qt for Apple macOS; supports applications on Cocoa[106] |
iOS | Qt for iOS platforms (iPhone, iPad)[107] |
Other embedded platforms | |
Integrity | Qt for Integrity[108] |
QNX | Qt for QNX[109][110] |
VxWorks | Qt for VxWorks.[111][112] Only available under a proprietary (commercial) license. Qt 5.5. |
After Nokia opened the Qt source code to the community on Gitorious, various ports appeared. There are also some ports of Qt that may be available, but are not supported anymore. These platforms are listed in List of platforms supported by Qt. See also there for current community support for other lesser known platforms, such as SailfishOS.
Licensing[edit]
Qt is available under the following free software licenses:[12] GPL 2.0, GPL 3.0, LGPL 3.0 and LGPL 2.1 (with Qt special exception).[5][113] Note that some modules are available only under a GPL license, which means that applications which link to these modules need to comply with that license.[114]
In addition, Qt has always been available under a commercial license, like the Qt Commercial License,[4] that allows developing proprietary applications with no restrictions on licensing.
Qt tools[edit]
Qt comes with its own set of tools to ease cross-platform development, which can otherwise be cumbersome due to different set of development tools.
Qt Creator is a cross-platform IDE for C++ and QML. Qt Designer's GUI layout/design functionality is integrated into the IDE, although Qt Designer can still be started as a standalone tool.
In addition to Qt Creator, Qt provides qmake, a cross-platform build script generation tool that automates the generation of Makefiles for development projects across different platforms. There are other tools available in Qt, including the Qt Designer interface builder and the Qt Assistant help browser (which are both embedded in Qt Creator), the Qt Linguist translation tool, uic (user interface compiler), and moc (Meta-Object Compiler).
History of Qt[edit]
Early developments[edit]
In the summer of 1990, Haavard Nord and Eirik Chambe-Eng (the original developers of Qt and the CEO and President, respectively, of Trolltech) were working together on a database application for ultrasound images written in C++ and running on Mac OS, Unix, and Microsoft Windows.[1][115] They began development of "Qt" in 1991, three years before the company was incorporated as Quasar Technologies, then changed the name to Troll Tech and then to Trolltech.[1]
The toolkit was called Qt because the letter Q looked appealing in Haavard's Emacs typeface, and "t" was inspired by Xt, the X toolkit.[1]
The first two versions of Qt had only two flavors: Qt/X11 for Unix and Qt/Windows for Windows.
On 20 May 1995 Trolltech publicly released Qt 0.90 for X11/Linux with the source code under the Qt Free Edition License.[116][117][118] This license was viewed as not compliant with the free software definition by Free Software Foundation because, while the source was available, it did not allow the redistribution of modified versions. Trolltech used this license until version 1.45. Controversy erupted around 1998 when it became clear that the K Desktop Environment was going to become one of the leading desktop environments for Linux. As it was based on Qt, many people in the free software movement worried that an essential piece of one of their major operating systems would be proprietary.
The Windows platform was available only under a proprietary license, which meant free/open source applications written in Qt for X11 could not be ported to Windows without purchasing the proprietary edition.
Becoming free software–friendly[edit]
With the release of version 2.0 of the toolkit in mid-1999, the license was changed to the Q Public License (QPL), a free software license, but one regarded by the Free Software Foundation as incompatible with the GPL. Compromises were sought between KDE and Trolltech whereby Qt would not be able to fall under a more restrictive license than the QPL, even if Trolltech was bought out or went bankrupt. This led to the creation of the KDE Free Qt foundation,[119] which guarantees that Qt would fall under a BSD-style license should no free/open source version of Qt be released during 12 months.[120][121]
In 2000, Qt/X11 2.2 was released under the GPL v2,[122] ending all controversy regarding GPL compatibility.
At the end of 2001, Trolltech released Qt 3.0, which added support for Mac OS X (now known as macOS). The Mac OS X support was available only in the proprietary license until June 2003, when Trolltech released Qt 3.2 with Mac OS X support available under the GPL.
In 2002, members of the KDE on Cygwin project began porting the GPL licensed Qt/X11 code base to Windows.[123] This was in response to Trolltech's refusal to license Qt/Windows under the GPL on the grounds that Windows was not a free/open source software platform.[124][125] The project achieved reasonable success although it never reached production quality.
This was resolved when Trolltech released Qt 4.0 also for Windows under the GPL in June 2005.[126] Qt 4 supported the same set of platforms in the free software/open source editions as in the proprietary edition, so it is possible, with Qt 4.0 and later releases, to create GPL-licensed free/open source applications using Qt on all supported platforms. The GPL v3 with special exception[127] was later added as an added licensing option. The GPL exception allows the final application to be licensed under various GPL-incompatible free software/open source licenses such as the Mozilla Public License 1.1.
Acquisition by Nokia[edit]
Nokia acquired Trolltech ASA on 17 June 2008 and changed the name first to Qt Software, then to Qt Development Frameworks.
Nokia focused on turning Qt into the main development platform for its devices, including a port to the Symbian S60 platform. Version 1.0 of the Nokia Qt SDK was released on 23 June 2010.[128] The source code was made available over Gitorious, a community oriented git source code repository, with a goal of creating a broader community using and improving Qt.
On 14 January 2009, Qt version 4.5 added another option, the LGPL,[129] to make Qt more attractive for both non-GPL open source projects and closed applications.[130]
In February 2011, Nokia announced its decision to drop Symbian technologies and base their future smartphones on the Windows Phone platform instead (and since then support for that platform has also been dropped).[131] One month later, Nokia announced the sale of Qt's commercial licensing and professional services to Digia, with the immediate goal of taking Qt support to Android, iOS and Windows 8 platforms, and to continue focusing on desktop and embedded development, although Nokia was to remain the main development force behind the framework at that time.
Merging and demerging with Digia[edit]
In March 2011, Nokia sold the commercial licensing part of Qt to Digia, creating Qt Commercial.[132] In August 2012, Digia announced that it would acquire Qt from Nokia.[133] The Qt team at Digia started their work in September 2012.[134] They released Qt 5.0 within a month and newer versions every six months with new features and additional supported platforms.
In September 2014, Digia transferred the Qt business and copyrights to their wholly owned subsidiary, The Qt Company, which owns 25 brands[135] related to Qt. In May 2016, Digia and Qt demerged completely into two independent companies.[136]
The Qt Project and open governance[edit]
Qt 5 was officially released on 19 December 2012. This new version marked a major change in the platform, with hardware-accelerated graphics, QML and JavaScript playing a major role. The traditional C++-only QWidgets continued to be supported, but did not benefit from the performance improvements available through the new architecture.[137] Qt 5 brings significant improvements to the speed and ease of developing user interfaces.[138]
Framework development of Qt 5 moved to open governance at qt-project.org, which made it possible for developers outside Digia to submit patches for review.[139]
Qt contributors[edit]
![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Qt_contributors_2013W18_without_Digia.png/300px-Qt_contributors_2013W18_without_Digia.png)
Aside from The Qt Company, many organizations and individuals using Qt as their development platform participate in the open development of Qt via the Qt Project.[140]
One such Qt contributor is Klarälvdalens Datakonsult AB, a Swedish Qt consulting company.[141] KDAB is involved in many areas, including maintenance of several components.[142][143]
Together with RIM/BlackBerry, KDAB is maintaining the QNX and BlackBerry 10 ports of Qt.[140][144]
Another participator is Intel, contributing for example Wayland support.[145] AudioCodes maintains IBM ClearCase support in Qt Creator.[146]
As a heavy user of Qt, the KDE project submits many patches and features from its developer library KDE Frameworks back to Qt.[147]
See also[edit]
Bibliography[edit]
Qt Wiki provides a comprehensive list of English books about Qt.[148] This is a list of notable books:
- Bocklage-Ryannel, Juergen; Thelin, Johan (12 May 2015). "Qt 5 Cadaques" (1st ed.).
- Blanchette, Jasmin; Summerfield, Mark (14 February 2008). C++ GUI Programming with Qt 4 (2nd ed.). Prentice Hall. ISBN 978-0-13-235416-5.
- Summerfield, Mark (23 August 2010). Advanced Qt Programming: Creating Great Software with C++ and Qt 4 (1st ed.). Addison-Wesley. ISBN 978-0-321-63590-7.
- Fitzek, Frank H. P.; Mikkonen, Tommi; Torp, Tony (17 May 2010). Qt for Symbian (1st ed.). Wiley. ISBN 978-0-470-75010-0. Archived from the original on 19 December 2009.
- Summerfield, Mark (28 October 2007). Rapid GUI Programming with Python and Qt (1st ed.). Prentice Hall. ISBN 978-0-13-235418-9.
- Molkentin, Daniel (19 July 2007). The Book of Qt 4: The Art of Building Qt Applications (1st ed.). No Starch Press. ISBN 978-1-59327-147-3.
- Thelin, Johan (3 August 2007). Foundations of Qt Development (1st ed.). Apress. ISBN 978-1-59059-831-3. Archived from the original on 20 January 2015. Retrieved 18 June 2015.
- Dalheimer, Matthias (January 2002). Programming with Qt (2nd ed.). O'Reilly Media. ISBN 978-0-596-00064-6.
- Ezust, Alan; Ezust, Paul (10 September 2006). An Introduction to Design Patterns in C++ with Qt 4 (2nd ed.). Prentice Hall. ISBN 978-0-13-187905-8.
References[edit]
- ^ a b c d e Blanchette, Jasmin; Summerfield, Mark (June 2006). "A Brief History of Qt". C++ GUI Programming with Qt 4 (1st ed.). Prentice-Hall. pp. xv–xvii. Archived from the original on 23 September 2019. Retrieved 5 August 2013.
- ^ "Qt 6.7.2 Released". 19 June 2024. Retrieved 19 June 2024.
- ^ "Supported Platforms".
- ^ a b c "Licenses".
- ^ a b c "New agreement with the KDE Free Qt Foundation and changes for the open source version". The Qt Company.
- ^ a b "Adding LGPL v3 to Qt". 20 August 2014.
- ^ "Qt - About Us". Archived from the original on 22 February 2017.
- ^ Ashlee Vance (16 February 2010). "That Smartphone Is So Qt". Retrieved 19 February 2010.
- ^ Pintscher, Lydia (21 October 2011). "KDE Applauds Qt's Move to Open Governance". KDE.News. Retrieved 8 May 2013.
- ^ Meyer, David (24 October 2011). "Nokia gives Qt open-source governance". ZDNet. Retrieved 8 May 2013.
- ^ Knoll, Lars (6 August 2014). "Defragmenting Qt and Uniting Our Ecosystem".
- ^ a b "Legal - FAQ - Qt". www.qt.io. The Qt Company. Retrieved 25 April 2019.
- ^ "Cutelyst - Home".
- ^ "PyQt Documentation". www.riverbankcomputing.com. 27 December 2023.
- ^ "PHP-Qt - the Qt extension for php". www.php-qt.org. 10 October 2020. Archived from the original on 12 October 2020. Retrieved 12 October 2020.
- ^ "Qt 6.2.2 Released". Qt. The Qt Company. 1 December 2021. Retrieved 6 December 2021.
- ^ "QT GROUP OYJ - Managers' Transactions, 12/4/2017". 12 April 2017. Retrieved 8 June 2017.
- ^ Shneor, Rotem (2012). Handbook of Research on Born Globals, Chapter 10: Born Global Firms, Internet, and New Forms of Internationalization. Edward Elgar. ISBN 9780857938046. Retrieved 8 June 2017.
- ^ "The KDE development platform".
- ^ Marius Nestor (24 December 2015). "Beautifully Crafted Deepin 15 Linux OS Drops Ubuntu for Debian Sid, RC Out Now".
The Deepin desktop environment has been refactored in the latest Qt GUI toolkit, replacing the HTML5 and WebKit frameworks, while Go is still used for the backend.
- ^ "深度操作系统 15 RC ——用真心捕获你的芳心 – 深度科技社区". Deepin.org. 23 December 2015. Retrieved 15 June 2017.
- ^ Joey Sneddon (5 February 2020). "Wowser, the UKUI 3.0 Desktop Looks Phenomenal (Updated)". omg!ubuntu!.
- ^ "OMGUbuntu Review". 11 June 2021.
- ^ "Lumina Homepage".
- ^ "Lomiri: New name, Same Great Unity8". ubports.com. 12 July 2019.
- ^ "Unity8 Code Repository on Github". Github.com. 13 September 2022.
- ^ "Review by Tylers Tech channel". YouTube. 6 January 2022.
- ^ "About Trinity". www.trinitydesktop.org. Retrieved 25 April 2019.
- ^ "X Series Qt-based graphical user interface". Archived from the original on 23 February 2016. Retrieved 14 March 2016.
- ^ "Avionics powered by Qt". 17 June 2015.
- ^ "Qt Interface". 23 October 2013.
- ^ "Sky teams up with The QT Company on Sky Q". 19 April 2016.
- ^ Blanchette, Jasmin; Summerfield, Mark (4 February 2008). C++ GUI Programming with Qt4 By Jasmin Blanchette, Mark Summerfield. Pearson Education. ISBN 9780132703000.
- ^ Zerfos, Petros; Montanari, Rebecca; Phan, Thomas (11 May 2010). Mobile Computing, Applications, and Services: First International ICST Conference, MobiCASE 2009, San Diego, CA, USA, October 26-29, 2009, Revised Selected Papers, Edited by Petros Zerfos, Rebecca Montanari, Thomas Phan. Springer. ISBN 9783642126062.
- ^ Walton, Mark (2 November 2015). "AMD Radeon Software Crimson: A new name and a new look for Catalyst".
- ^ "Qt in Autodesk". Archived from the original on 23 July 2011.
- ^ "What's New: 3ds Max 2018 SDK". help.autodesk.com. Retrieved 14 June 2019.
3ds Max 2018 now uses Qt 5.6.2, and plug-ins can build UIs in Qt using the standard GPL Qt 5.6.2 distribution, and the Visual Studio 2015 Qt add-on
- ^ "Plugin devs: Upcoming migration to Qt 6 - MobileRead Forums".
- ^ a b "An update on our Sandbox interface and the Legacy Editor".
- ^ "Dogecoin Core [DOGE, Ð]". GitHub.
- ^ "Dyami Caliri, Qt Champion 2014".
- ^ "Google Earth Includes a Web Browser". Googlesystem.Blogspot.de. 15 June 2010. Retrieved 8 April 2013.
- ^ "Krita 3.0 Released". 31 May 2016. Retrieved 5 September 2017.
- ^ "Mathematica by Wolfram Research". Archived from the original on 29 May 2013.
- ^ "Monero GUI". GitHub. 2 June 2022.
- ^ "Orange3 Data Mining Suite". GitHub. 3 June 2022.
- ^ "Parallel Data Analysis and Visualization Application based on VTK".
- ^ "Qbittorrent". GitHub. 18 February 2022.
- ^ "PyQGIS Developer Cookbook: Introduction". qgis.org. Retrieved 1 March 2017.
the whole QGIS code depends on Qt libraries
- ^ "Scribus Development".
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Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction