GTK is a multi-platform toolkit for creating graphical user interfaces.
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Timm Bäder f6ebc06767 filechooserwidget: Avoid an uninitialized value
If the operation mode is OPERATION_MODE_RECENT and we end up in the
'goto file_entry' case, we don't set info.result. Then later after
calling check_save_entry, is_empty is TRUE which causes a goto out and
here we then try to use info.result, which is uninitialized.

Initialize info.result before doing all this.

Found by scan-build
2020-10-22 17:46:33 +02:00
.gitlab/issue_templates issue templates: reproducers should be written in C 2019-05-18 13:47:59 +02:00
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demos print-editor: Fix a wrong comparison 2020-10-22 17:46:33 +02:00
docs linkbutton: Use the LINK role 2020-10-21 22:19:54 -04:00
examples Clean up uses of gtk_toggle_button_get/set_active 2020-08-30 21:23:25 -04:00
gdk macos: fix discovery of surface under pointer 2020-10-19 12:35:41 -07:00
gsk Add some missing nullable return annotations 2020-10-17 15:32:36 +02:00
gtk filechooserwidget: Avoid an uninitialized value 2020-10-22 17:46:33 +02:00
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tests showrendernode: Pass error to deserialize() 2020-10-22 17:46:33 +02:00
testsuite listbox test: Only compare values for rows we have 2020-10-22 17:46:33 +02:00
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gtk4-unix-print.pc.in Adjust some more pkg-config references for gtk+ to gtk rename 2019-02-06 09:56:08 +01:00
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meson_options.txt meson: Change introspection option to yielding feature 2020-09-30 15:11:27 -04:00
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GTK — The GTK toolkit

Build status

General information

GTK is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK is suitable for projects ranging from small one-off projects to complete application suites.

GTK is free software and part of the GNU Project. However, the licensing terms for GTK, the GNU LGPL, allow it to be used by all developers, including those developing proprietary software, without any license fees or royalties.

The official download location

The official web site

The official developers blog

Discussion forum

Nightly documentation can be found at

Building and installing

In order to build GTK you will need:

You will also need various dependencies, based on the platform you are building for:

If you are building the X11 backend, you will also need:

  • Xlib, and the following X extensions:
    • xrandr
    • xrender
    • xi
    • xext
    • xfixes
    • xcursor
    • xdamage
    • xcomposite

If you are building the Wayland backend, you will also need:

  • Wayland-client
  • Wayland-protocols
  • Wayland-cursor
  • Wayland-EGL

Once you have all the necessary dependencies, you can build GTK by using Meson:

$ meson _build .
$ cd _build
$ ninja

You can run the test suite using:

$ meson test

And, finally, you can install GTK using:

$ sudo ninja install

Complete information about installing GTK and related libraries can be found in the file:

docs/reference/gtk/html/gtk-building.html

Or online

How to report bugs

Bugs should be reported on the issues page.

In the bug report please include:

  • Information about your system. For instance:

    • which version of GTK you are using
    • what operating system and version
    • for Linux, which distribution
    • if you built GTK, the list of options used to configure the build

    And anything else you think is relevant.

  • How to reproduce the bug.

    If you can reproduce it with one of the demo applications that are built in the demos/ subdirectory, on one of the test programs that are built in the tests/ subdirectory, that will be most convenient. Otherwise, please include a short test program that exhibits the behavior. As a last resort, you can also provide a pointer to a larger piece of software that can be downloaded.

  • If the bug was a crash, the exact text that was printed out when the crash occurred.

  • Further information such as stack traces may be useful, but is not necessary.

Contributing to GTK

Please, follow the contribution guide to know how to start contributing to GTK.

Release notes

The release notes for GTK are part of the migration guide in the API reference. See:

Licensing terms

GTK is released under the terms of the GNU Lesser General Public License, version 2.1 or, at your option, any later version, as published by the Free Software Foundation.

Please, see the COPYING file for further information.

GTK includes a small number of source files under the Apache license:

  • A fork of the roaring bitmaps implementation in gtk/roaring
  • An adaptation of timsort from python in gtk/timsort