Qt GUI▲
The Qt GUI module provides classes for windowing system integration, event handling, OpenGL and OpenGL ES integration, 2D graphics, basic imaging, fonts, and text. These classes are used internally by Qt's user interface technologies but can also be used directly, for example to write applications using low-level OpenGL ES graphics APIs.
For application developers writing user interfaces, Qt provides higher level APIs, like Qt Quick, that are much more suitable than the enablers found in the Qt GUI module.
Using the Module▲
Using a Qt module's C++ API requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.
Building with CMake▲
Use the find_package() command to locate the needed module component in the Qt6 package:
find_package(Qt6 REQUIRED COMPONENTS Gui)
target_link_libraries(mytarget PRIVATE Qt6::Gui)For more details, see the Build with CMake overview.
Building with qmake▲
If you use qmake to build your projects, Qt GUI is included by default. To disable Qt GUI, add the following line to your .pro file:
QT -= guiArticles and Guides▲
Reference▲
Module Evolution▲
Changes to Qt GUI lists important changes in the module API and functionality that were done for the Qt 6 series of Qt.
Licenses and Attributions▲
Qt GUI is available under commercial licenses from The Qt Company. In addition, it is available under free software licenses: The GNU Lesser General Public License, version 3, or the GNU General Public License, version 2. See Qt Licensing for further details.
Furthermore, Qt GUI in Qt 6.5.3 may contain third-party modules under following permissive licenses:
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Adobe Glyph List For New Fonts, version 1.7: BSD 3-Clause "New" or "Revised" License
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Anti-aliasing rasterizer from FreeType 2: Freetype Project License or GNU General Public License v2.0 only
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Bitstream Vera Font, version 1.10: Bitstream Vera Font License
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Cocoa Platform Plugin: BSD 3-clause "New" or "Revised" License
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DejaVu Fonts, version 2.37: Bitstream Vera Font License
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Freetype 2 - Bitmap Distribution Format (BDF) support: MIT License
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Freetype 2 - Portable Compiled Format (PCF) support: MIT License and MIT Open Group variant
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Freetype 2 - zlib: zlib License
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Freetype 2, version 2.13.2: Freetype Project License or GNU General Public License v2.0 only
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HarfBuzz-NG, version 8.2.0: MIT License
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IAccessible2 IDL Specification, version 1.3.0: BSD 3-clause "New" or "Revised" License
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LibJPEG-turbo, version 3.0.0: Independent JPEG Group License and BSD 3-Clause "New" or "Revised" License and zlib License
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LibPNG, version 1.6.40: libpng License and PNG Reference Library version 2
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MD4C, version 0.4.8: MIT License
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Native Style for Android: Apache License 2.0
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OpenGL ES 2 Headers, version Revision 27673: MIT License
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OpenGL Headers, version Revision 27684: MIT License
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Pixman, version 0.17.12: MIT License
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Smooth Scaling Algorithm: BSD 2-clause "Simplified" License and Imlib2 License
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Vulkan API Registry, version 1.3.223: Apache License 2.0 or MIT License
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Vulkan Memory Allocator, version 3.0.1: MIT License
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WebGradients: MIT License
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Wintab API: LCS-Telegraphics License
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X Server helper: X11 License and Historical Permission Notice and Disclaimer
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XCB-XInput: MIT License
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sRGB color profile icc file: International Color Consortium License