Библиотеки qt nokia x6

библиотеки qt nokia x6 the company formerly known as Qt Software, see The Qt Company.

GUI designing in Qt Creator using the embedded Qt Designer

Original author(s)Haavard Nord and Eirik Chambe-Eng[1]
Initial release20 May 1995; 22 years ago (1995-05-20)[1]
Stable release5.10 (7 December 2017; 4 months ago (2017-12-07))[±][2]
Development statusActive
Written inC++
Operating systemAndroid, iOS, Linux (Embedded, Wayland, X11), macOS, Windows, Windows Phone, …[3]
TypeApplication framework
LicenseQt Commercial License[4]
GPL 2.0, 3.0[5]
LGPL 3.0[6]

Qt ( "cute"[7][8][9]) is a cross-platformapplication framework and widget toolkit for creating classic and embedded graphical user interfaces, and applications that 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 библиотеки qt nokia x6 being developed both by The Qt Company, a publicly listed company, and the Qt Project under open-source governance, involving individual developers and firms working to advance Qt.[10][11][12] Qt is available with both proprietary[4] and open source[13]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 most mobile or embedded platforms.

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.[14] GUI programs created with Qt can have a native-looking interface, in which case Qt is classified as a widget toolkit.

Qt supports many compilers, including the GCC C++ compiler and the Visual Studio suite and has extensive библиотеки qt nokia x6 support.

Qt also provides Qt Quick, that includes a declarativescripting language библиотеки qt nokia x6 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.

Non-GUI features include SQL database access, XML parsing, JSON parsing, thread management and network support.

Qt adoption[edit]

In 2017, the Qt Company estimates a community of approximately 1 million developers worldwide[15] in over 70 industries.[16]

Organizations using Qt[edit]

See also: Category:Proprietary software that uses Qt

Qt is библиотеки qt nokia x6 by a wide range of companies and organizations such as

  • AMD[17]
  • Blizzard Entertainment,[18]
  • Electronic Arts,[19]
  • European Space Agency,[20]
  • DreamWorks,[21][22]
  • Lucasfilm,[23][24]
  • Panasonic,[25]
  • Philips,[26]
  • Samsung,[27]
  • Siemens,[28]
  • Volvo,[29]
  • German Air Traffic Control,[30]
  • HP,[31]
  • Walt Disney Animation Studios,[32]
  • Valve Corporation.[33]

GUI and desktop environments[edit]

Several GUIs and desktop environments utilize Qt as widget toolkit:

  • KDE Plasma, a libre desktop библиотеки qt nokia x6 for computers and tablets[34]
  • LXQt (Lightweight X11 Desktop Environment), the successor to the GTK+-based LXDE, based on Qt
  • Lumina, a desktop environment designed for TrueOS[35]
  • DDE (Deepin Desktop Environment) for Deepin[36][37]
  • Budgie, started porting to Qt
  • LiriOS, a workspace built on Qt/QML[38]
  • Yunit,[39] a community-based fork of the Unity8-Shell[40]
  • Hawaii, a QtQuick and Wayland based desktop environment[41]
  • SDDM, a display manager that is X11 and Wayland compatible written in QML
  • Orbital, the default desktop for Библиотеки qt nokia x6 using QtQuick and Wayland protocol

Embedded systems[edit]

  • Current
    • AsteroidOS, an open source operating system designed for smartwatches
    • Avionics, Panasonic's in-flight entertainment system[42][43]
    • Sailfish OS, a mobile operating system developed by Jolla
    • Plasma Mobile, a touch-based GUI developed by KDE
    • Ubuntu Touch, a phone UI developed by Ubports, originally by Canonical
    • Tesla Model S in-car UI[44]
    • webOS, a multitask operating system for smart devices like TVs and smartwatches
  • Discontinued
    • Sky Q, the home entertainment system of Sky plc[45]
    • OPIE, a GUI for the Sharp Zaurus
    • Ultrahaptics,[46] haptic interface библиотеки qt nokia x6 for a wide range of applications

Applications using Qt[edit]

See also: Category:Software that uses Qt

Notable applications using Qt or QML are:

  • Adobe Photoshop Album[47]
  • Adobe Photoshop Elements[48]
  • AMD's Radeon Software Crimson Edition driver tool application.[49]
  • Autodesk Maya[50]
  • Bitcoin Core
  • CryEngine V editor[51]
  • Dragonframe[52] stop motion animation software
  • FreeMat free open source numerical computing environment
  • Google Earth[53]
  • Krita graphics editing and digital painting software[54]
  • Mathematica, a mathematical symbolic computation program, sometimes termed a computer algebra system or program, used in many scientific, engineering, mathematical, and computing fields.[55]
  • Orange data mining suite[56]
  • QGIS geographic information system[57]
  • Scribus desktop publishing software[58]
  • Sibelius music composition and notation software[59]
  • Skype
  • Source 2 engine tools[60] a 3D video game engine developed by Valve Corporation
  • Spotify for Linux[61]
  • Stellarium, a planetarium program
  • Subsurface, a software for logging and planning scuba dives initially designed and developed by Linus Torvalds[62]
  • Teamviewer, a computer software package for remote control, desktop sharing, библиотеки qt nokia x6 meetings, web conferencing and file transfer between computers[63]
  • Telegram, a messaging client available for Windows, Mac and Linux[64]
  • VirtualBox OS virtualization software[65]
  • VLC media player[66]
  • WPS Office[67]
  • XnView MP[68]

There are cases where applications have ported their entire code base from another toolkit to Qt to make use of a cross-platform native GUI, библиотеки qt nokia x6 as the Wireshark network packet analyzer, LXQt desktop, VLC media player and the Rosegarden audio editor.

See also: Category:Software that was ported from GTK+ to Qt

Qt contributors[edit]

Aside from the project leader Digia and various individuals, a number of other organizations participate in the Qt Project.[69]

Second-largest Qt contributor is KDAB, a Swedish Qt consulting company.[70] KDAB is involved in many areas, including maintenance of several components.[71][72] KDAB together with RIM/BlackBerry are maintaining the QNX and BlackBerry 10 ports of Qt.[69][73]

Another big participator is Intel, contributing for библиотеки qt nokia x6 Wayland support.[74]AudioCodes maintains IBM ClearCase support in Qt Creator.[75]

Various individuals from KDE implement features from KDE Frameworks in Qt.[76]

Supported platforms[edit]

Main article: List of platforms supported by Qt

Qt works on many different platforms; the following are officially supported:

X11Qt for X Window System (Linux, *BSD, HP-UX, Solaris, AIX, etc.)[77]
WaylandQt for Wayland.[78] Qt applications can switch between graphical backends like X and Wayland at load time with библиотеки qt nokia x6 -platform command line option.[79][80] This allows a seamless transition of Qt applications from Библиотеки qt nokia x6 to Wayland.
Embedded LinuxQt for embedded platforms: personal digital assistant, smartphone, etc.[81] Exists as multiple platforms depending on display technology.

DirectFB, LinuxFB and EGLFS (EGL Full Screen).

AndroidQt for Android[82] (formerly known as Necessitas)[83].
Apple Platforms
macOSQt for Apple macOS; supports applications on Cocoa[84]
iOSQt for iOS platforms (iPhone, iPad)[85]
Microsoft Platforms
WindowsQt for Microsoft Windows XP, Vista, 7,[86]8 and 10[87]
Windows PhoneSupport for Windows Phone 8[88] With 5.4 minimum supported version: Windows Phone 8.1[89]
Windows RTSupport for WinRT-based Windows 10 Mobile apps and Windows 10 IoT[90]
Windows CEQt for Windows CE 6 and Windows Embedded Compact 7.[91]
Other Embedded Platforms
IntegrityQt for Integrity[92]
QNXQt for QNX[93][94]
VxWorksQt for VxWorks.[95][96]

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 библиотеки qt nokia x6 in List of библиотеки qt nokia x6 supported by Qt.

Qt software architecture[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 depended really 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 библиотеки qt nokia x6 metrics and draw most controls, and do not suffer from such issues as much.[97] 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[98] 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 библиотеки qt nokia x6 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 библиотеки qt nokia x6 Qt to provide programming features not available natively in C++: signals and slots, introspection and asynchronous function calls.

Qt can be used in several other programming languages via language bindings, see

Main articles: List of language bindings for Qt 4 and List of language bindings for Qt 5

Qt modules[edit]

Starting with Qt 4.0 the framework was split into individual modules.[99][100] With Qt 5.0 the architecture was modularized even further.[101][102] Qt is now split into essential and add-on modules.[103]

Qt essentials[edit]

Qt CoreThe 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 GUIThe central GUI module.

In Qt 5 this module now depends on OpenGL, but no longer contains библиотеки qt nokia x6 widget classes.

Qt WidgetsContains classes for classic widget based GUI applications and the QSceneGraph classes. Was split off from QtGui in Qt 5.
Qt QMLModule for QML and JavaScript languages.
Qt QuickThe module for GUI application written using QML2.
Qt Quick ControlsWidget like controls for Qt Quick intended mainly for desktop applications.
Qt Quick LayoutsLayouts for arranging items in Qt Quick.
Qt NetworkNetwork abstraction layer.

Complete with TCP, UDP, HTTP, SSL and since Qt 5.3 SPDY support.

Qt MultimediaClasses for audio, video, radio and camera functionality.
Qt Multimedia WidgetsThe widgets from Qt Multimedia.
Qt SQLContains classes for database integration using SQL.
Qt WebEngineA new set of Qt Библиотеки qt nokia x6 and QML webview APIs based on Chromium.
Qt TestClasses for unit testing Qt applications and libraries.

Qt add-ons[edit]

Active QtClasses for applications which use ActiveX.
Qt BluetoothClasses accessing Bluetooth hardware.
Qt D-BusClasses for IPC using the D-Bus protocol.
Qt NFCClasses accessing NFC hardware.

Only officially supported on BlackBerry hardware so far (or N9 in the MeeGo port).

Qt OpenGLLegacy module containing the OpenGL classes from Qt 4. In Qt 5 the similar functionality in Qt GUI is recommended.
Qt LocationClasses 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 ScriptLegacy module for scripting Qt application using ECMAScript/JavaScript. In Qt 5, using similar classes in Qt QML is recommended.
Qt SensorsClasses 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 PortClasses for access to hardware and virtual serial ports. Supported on Windows, Linux and macOS.
Qt Библиотеки qt nokia x6 access to Qt objects библиотеки qt nokia x6 HTML/Js over WebSockets.
Qt WebKitQt's WebKit implementation and API.
Qt WebKit WidgetsThe widget API for Qt WebKit
Qt WebSocketsProvides a WebSocket implementation.
Qt XMLLegacy module containing classes for SAX and DOM библиотеки qt nokia x6 XML APIs.

Replaced with QXmlStreamReader and QXmlStreamWriter classes in Qt Core.

Qt XML Библиотеки qt nokia x6 for XPath, XQuery, XSLT and XML Schema validation.

Qt tools[edit]

See also: Qt Creator

Qt comes with its own set of tools to библиотеки qt nokia x6 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 библиотеки qt nokia x6 development projects across different platforms. There are other tools available in Qt, including the Qt Designer interface builder and the Qt Библиотеки qt nokia x6 help browser (which are both embedded in Qt Библиотеки qt nokia x6, the Qt Linguist translation tool, uic (user interface compiler), and moc (Meta-Object Compiler).


There are four editions of Qt available: Community, Indie Mobile, Professional and Enterprise.[104] 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 Библиотеки qt nokia x6 are commercially sold by The Qt Company.


Qt is available under the following free software licenses:[13]GPL 3.0, LGPL 3.0 and LGPL 2.1 (with Qt special exception).[5][105] Note that some modules are only available under a GPL license, which means that applications which statically link to these modules need to comply with that license.[106][107]

In addition, Qt has always been available under a commercial license, like the Qt Commercial License,[4] that allows библиотеки qt nokia x6 proprietary applications with no restrictions on licensing.

History of Qt[edit]

See also: Qt version history

The upcoming version of Qt is Qt 5.10, which will be released on 30 November 2017[108] with several new features including initial Vulkan support for Windows, Linux and Android.[109] The current LTS version of Qt is 5.9 LTS which was released on 31 May 2017 and will be supported for 3 years until 31 May 2020.[110]

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 Windows.[1][111] 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 Troll Tech publicly библиотеки qt nokia x6 Qt 0.90 for X11/Linux with the source code under the Qt Free Edition License.[112][113][114] This license was viewed as not compliant with the open source principle by the Open Source Initiative and 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 only available 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, 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,[115] which guarantees that Qt would fall under a BSD-style license should no free/open source version of Qt be released during 12 months.[116][117]

In 2000, Qt/X11 2.2 was библиотеки qt nokia x6 under the GPL v2,[118] ending all controversy regarding Библиотеки qt nokia x6 compatibility.

At the end of 2001, Trolltech released Qt 3.0, which added support for Mac OS X.

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.[119] 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.[120][121] The project achieved reasonable success although it never reached production quality.

This was resolved when Trolltech released Qt 4.0 библиотеки qt nokia x6 for Windows under библиотеки qt nokia x6 GPL in June 2005.[122] 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[123] 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.

Since then it focused on Qt development to turn it into the main development platform for its devices, including a port to the SymbianS60 библиотеки qt nokia x6.

Version 1.0 of the Nokia Qt SDK was released on 23 June 2010.[124] The source code was made available over Gitorious, a community oriented git source code repository, to gather an even broader community that is not only using Qt but also helping to improve it.

On 14 January 2009, Qt version 4.5 added another option, the LGPL,[125] which should make Qt even more attractive for non-GPL open source projects and for closed applications.[126]

In February 2011, Nokia библиотеки qt nokia x6 its decision to drop Symbian technologies and base their future smartphones on the Windows Phone platform instead.[127] 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 библиотеки qt nokia x6 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.[128] In August 2012, Digia announced that it would acquire Qt from Nokia.[129] The Qt team at Digia started their work in September 2012.[130] They released Qt 5.0 within a month and newer versions every 6 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[131] related to Qt.

In May 2016, Digia and Qt demerged completely into two independent companies.[132]

The Qt Project and open governance[edit]

Main article: Qt Project

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.[133] Qt 5 brings significant improvements to the speed and ease of developing user interfaces.[134]

Framework development of Qt 5 moved to open governance, taking place at

There it is now possible for developers outside Digia to submit patches and have them reviewed.[135]

See also[edit]


  1. ^ abcdeBlanchette, Jasmin; Summerfield, Mark (June 2006).

    "A Brief History of Qt". C++ GUI Programming with Qt 4 (1st ed.). Prentice-Hall. pp. xv–xvii. Retrieved 5 August 2013. 

  2. ^Turunen, Tuukka (7 December 2017).

    "Qt 5.10 released".

    библиотеки qt nokia x6

    Qt Blog. The Qt Company. Библиотеки qt nokia x6 7 January 2018. 

  3. ^"Supported Platforms". 
  4. ^ abc"Licenses". 
  5. ^ abc"New agreement with the KDE Free Qt Foundation and changes for the open source version".

    The Qt Company. 

  6. ^ ab"Adding LGPL v3 to Qt". 20 August 2014. 
  7. ^"Qt - About Us". 
  8. ^"That Smartphone Is So Qt". Ashlee Vance. 16 February 2010. Retrieved 19 February 2010. 
  9. ^"The Qt библиотеки qt nokia x6 Dance"(video).

    Retrieved 7 September 2015. 

  10. ^Pintscher, Lydia (21 October 2011). "KDE Applauds Qt's Move to Open Governance". KDE.News. Retrieved 8 May 2013. 
  11. ^Meyer, David (24 October 2011). "Nokia gives Qt open-source governance". ZDNet.

    библиотеки qt nokia x6

    Retrieved 8 May 2013. 

  12. ^Knoll, Lars (6 August 2014). "Defragmenting Qt and Uniting Our Ecosystem". 
  13. ^ ab"Qt Licensing". 
  14. ^"Cutelyst - Home". 
  15. ^"QT GROUP OYJ - Managers' Transactions, 12/4/2017".

    12 April 2017. Retrieved 8 June 2017. 

  16. ^Shneor, Rotem (2012). "Handbook of Библиотеки qt nokia x6 on Born Библиотеки qt nokia x6, Chapter 10: Born Global Firms, Internet, and New Forms of Internationalization".

    Retrieved 8 June 2017. 

  17. ^"AMD's Radeon Software Crimson Edition". Retrieved 30 June 2016. 
  18. ^"Blizzard's additions/modifications to Qt". 
  19. ^"Open Source - Electronic Arts". 
  20. ^"Qt in the European Space Agency".

    Archived from the original on 23 July 2011. 

  21. ^Behind the Scenes at DreamWorks Animation: Making the Apps that Make the Movies. 
  22. ^UI & System Design Challenges for the NxG Lighting Tool. 
  23. ^"Lucasfilm Entertainment Company Ltd". 
  24. ^"Qt in Visual Effects".

    Archived from the original on 23 July 2011. 

  25. ^"Panasonic selects Qt for HD video system". Archived from the original on 23 July 2011. 
  26. ^"Qt in IP Communications".

    Archived from the original on 23 July библиотеки qt nokia x6 in Home Media". Archived from the original on 23 July 2011. 

  27. ^"Qt helped Siemens deliver a C++ development platform for manufacturing software GUIs". Archived from the original on 14 July 2011. 
  28. ^"Volvo Mobility Systems". Archived from the original on 14 July 2011. 
  29. ^"10 Qt use cases you didn't know".

    Archived from the original on 30 July 2013. 

  30. ^"Developing Innovative Desktop and Embedded HP Products with Qt". Archived from the original on 6 May 2014. 
  31. ^"Qt helped Walt Disney reduce development time spent on its cross-platform feature film production application".

    Archived from the original on 14 July 2011. 

  32. ^"Qt - Valve Developer Community". Retrieved 28 April
KDE's mascot Konqi showing his Qt heart
Distribution of non-Digia Qt contributors (2013, Week 18)
Example of Qt usage библиотеки qt nokia x6 Linux-based systems