Qt Project: Difference between revisions

Revision as of 02:13, 14 October 2016

Revision as of 20:26, 27 November 2016

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The '''Qt Project''' is a project to co-ordinate the development of the [[Qt (framework)|Qt software framework]]. OriginallyThe project was founded by [[Nokia]],<ref name="open governance">{{cite web|url=http://dot.kde.org/2011/10/21/kde-applauds-qts-move-open-governance |title=KDE Applauds Qt’s Move to Open Governance |publisher=KDE.News |author=Lydia Pintscher |date=21 October 2011 |accessdate=2013-05-08}}</ref> theand projecthas isbeen now led by [[Digia|Digia’s]] subsidiary [[The Qt Company]] aftersince it acquired Qt software technologies, trademarks, and personnel from Nokia.<ref name="DigiaQt">{{cite web|url=http://www.digia.com/en/Home/Company/News/Digia-to-acquire-Qt-from-Nokia/ |title=Digia to acquire Qt from Nokia |publisher=Digia.com |date= |accessdate=2013-03-19}}</ref>

== History ==

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Until version 1.45, source code for Qt was released under the ''Qt Free Edition License''.<ref>{{cite web|url=https://quickgit.kde.org/?p=qt1.git&a=blob&h=2b98366d82a95f66988a7206290120e8c698ea40&f=LICENSE&o=plain|title=Qt Free Edition License|year=1992|publisher=Trolltech|accessdate=14 October 2016|archivedate=14 October 2016}}</ref> This 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.

Controversy eruptedarose around 1998 when it became clear that [[KDE|KDE’s]] [[K Desktop Environment 1|K Desktop Environment]] was going to become one of the leading [[desktop environment]]s 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.

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 which guarantees that Qt would fall under a [[BSD-style license]] should no free/open source version of Qt be released during 12 months.<ref name="foundation">{{cite web|url=http://www.kde.org/community/whatiskde/kdefreeqtfoundation.php |title=Free Qt Foundation |publisher=KDE |date= |accessdate=2013-05-08}}</ref>

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In 2000, Qt 2.2 was released under the GPL v2, ending all controversy regarding GPL compatibility.<ref name="Qt2.2-GPL">{{cite web|url=http://www.linuxplanet.com/linuxplanet/reports/2269/1/ |title=Trolltech to Release Qt Under GPL - Decision Alters Linux GUI Landscape - Reports |publisher=LinuxPlanet |date=2000-09-04 |accessdate=2013-05-08}}</ref>

On {{date|2008-01-28|format=dmy}} [[Nokia]] announced to acquire Trolltech.<ref>{{cite web|url=http://www.nokia.com/A4136001?newsid=1185531|title=Nokia to acquire Trolltech to accelerate software strategy |date=28 January 2008|accessdate=28 January 2008}}</ref><ref>{{cite web|last=Paul |first=Ryan |url=http://arstechnica.com/information-technology/2008/01/nokia-buys-trolltech-will-become-a-patron-of-kde/ |title=Nokia to buy Trolltech, will become a patron of KDE |publisher=Ars Technica |date=2008-01-28 |accessdate=2013-05-08}}</ref>

On {{date|2009-01-14|format=dmy}} Qt version 4.5 was [[Software relicensing|relicensed]], adding [[LGPL]] as licensing option.<ref>{{cite web|url=http://dot.kde.org/2009/01/14/qt-everywhere-45-be-relicensed-lgpl |title=Qt Everywhere: 4.5 To Be Relicensed As LGPL |publisher= |date= |accessdate=2013-05-08}}</ref>

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== See also ==

* [[KDE]]

* [[KDE e.V.]]

* [[Trolltech]]

== External links ==