About Qt

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What is Qt?

Qt on Wikipedia

• framework
• cross-platform
• application development
• C++, extensions with MOC
• GUIs in QML (QtQuick) or XML (QWidgets)
• Desktop, embedded, mobile: Linux, OS X, Windows, VxWorks, QNX, Android, iOS, BlackBerry, Sailfish OS,..., see Supported Platforms
• Bindings to other programming languages, e.g. to Python using PyQt
• Qt is owned by The Qt Company (wholly owned subsidiary of Digia Plc., Finland)
• The Qt Governance Model
• Developed by many parties (see stats)
• Different licenses: Multiple commercial licenses, LGPL, GPL, see: Licensing FAQ
• superb documentation
• Brings own IDE (Qt Creator) for Linux, OS X and Windows; code completion, syntax highlighting, integrated help system, debugger and profiler integration, integration for all major version control systems, GUI designer
• Brings add-in for Microsoft Visual Studio
• Other IDEs can be used
• Brings additional tools like build system (qmake, other build systems like cmake also supported) and internationalization tools

Statistics

• 1 million downloads of Qt 5.3 measured just over a month after launch.

• 250+ commits by 60+ contributors per week

• Leading companies in over 70 industries use Qt to power millions of devices and applications.

• Main companies contributing to Qt in 2015:
  • The Qt Company (Finland)
  • KDAB (Sweden)
  • AudioCodes (Israel)
  • Intel (USA)
  • Intopalo (Finland)
  • Jolla (Finland)
  • BlackBerry (Canada)
  • Woboq (Germany)

• Service partners of The Qt Company:
  • basysKom (Germany)
  • develer (Italy)
  • e-GITS (Germany)
  • ICS (USA)
  • KDAB (Sweden)
  • Qtomac (Australia)
  • Zühlke Engineering (Germany)

• Technology partners:
  • Adeneo Embedded (France)
  • ARM (UK)
  • Boundary Devices (USA)
  • Freescale Semiconductor (USA)
  • froglogic (Germany)
  • SILICA (Germany)
  • Texas Instruments (USA)
  • Toradex (Switzerland)
  • V-Play (Austria)

• Community partners:
  • FRUCT (Finnish-Russian University Cooperation in Telecommunications)
  • KDE e.V. (non-profit organization of KDE community members)

History

• “In the summer of 1990, Haavard [Nord] and Eirik [Chambe-Eng] were working together on a C++ database application for ultrasound images. The system needed to be able to run with a GUI on Unix, Macintosh, and Windows. One day that summer, Haavard and Eirik went outside to enjoy the sunshine, and as they sat on a park bench, Haavard said, “We need an object-oriented display system.” The resulting discussion laid the intellectual foundation for the object-oriented cross-platform GUI framework they would soon go on to build.”
• Release history

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