GTK is a multi-platform toolkit for creating graphical user interfaces.
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Simon McVittie 79285bd63e gdkevents: Don't ignore modifiers that are not currently active
The X11 backend can mark modifiers like Shift as consumed even if they
aren't actually active, which seems to be something to do with making
shortcuts like `<Control><Shift>plus` and `<Control>plus` work as
intended regardless of whether the plus symbol is obtained by pressing
Shift and a key (like `+/=` on American, British or French keyboards)
or not (like `*/+` on German keyboards).

However, this can go badly wrong when the modifier is *not* pressed.
For example, terminals normally have separate bindings for `<Control>c`
(send SIGINT) and `<Control><Shift>c` (copy). If we disregard the
consumed modifiers completely, when the X11 backend marks Shift as
consumed, pressing Ctrl+c would send SIGINT *and* copy to the clipboard,
which is not what was intended.

By masking out the members of `consumed` that are not in `state`, we
get the same interpretation for X11 and Wayland, and ensure that
keyboard shortcuts that explicitly mention Shift can only be triggered
while holding Shift. It continues to be possible to trigger keyboard
shortcuts that do not explicitly mention Shift (such as `<Control>plus`)
while holding Shift, if the backend reports Shift as having been
consumed in order to generate the plus keysym.

Resolves: https://gitlab.gnome.org/GNOME/gtk/-/issues/5095
Bug-Debian: https://bugs.debian.org/1016927
Signed-off-by: Simon McVittie <smcv@debian.org>
2022-09-17 19:40:53 +01:00
.gitlab/issue_templates Update references to master in the repository 2021-11-29 17:37:49 -05:00
.gitlab-ci ci: Improve style check script 2022-09-09 19:41:42 -04:00
build-aux flatpak: add a NodeEditor demo 2022-07-25 15:38:55 +03:00
demos Merge branch 'game-sounds' into 'main' 2022-09-10 00:32:45 +00:00
docs running.md: Mention about issue with Nahimic on Windows 2022-08-02 13:50:49 +08:00
examples examples: Use textures over pixbufs 2021-09-17 04:31:46 +02:00
gdk gdkevents: Don't ignore modifiers that are not currently active 2022-09-17 19:40:53 +01:00
gsk gsk: Make glyph upload more similar to icons 2022-09-10 15:25:59 -04:00
gtk gtk/main: Remove condition that always evaluates TRUE 2022-09-15 16:44:44 +02:00
modules cups printbackend: Plug memory leaks 2022-08-12 18:44:25 -04:00
po Update Chinese (China) translation 2022-09-11 19:24:40 +00:00
subprojects Add an explicit harfbuzz dependency 2022-05-15 10:37:24 -04:00
tests gdk/win32: correct gdk_win32_surface_get_handle return type 2022-08-23 16:17:19 +04:00
testsuite Add a test for short compose sequences 2022-09-12 22:30:47 -04:00
tools builder-tool: Screenshot popovers properly 2022-05-06 14:43:45 -04:00
.clang-format clang-format: This did not work 2022-09-10 14:35:40 -04:00
.editorconfig Add editorconfig file 2021-10-28 18:17:02 +01:00
.gitignore .gitignore: Ignore all subdirs in the subprojects dir 2018-10-12 14:23:53 +05:30
.gitlab-ci.yml ci: Move style check to its own stage 2022-09-10 00:16:12 +01:00
AUTHORS AUTHORS: some updates 2020-09-12 11:52:14 -04:00
CONTRIBUTING.md Update references to master in the repository 2021-11-29 17:37:49 -05:00
COPYING
gtk.doap Update the gtk.doap file 2021-01-18 09:14:50 -05:00
gtk.supp Add more valgrind suppressions 2022-08-12 12:44:02 -04:00
lsan.supp asan: Ignore leaks from librsvg 2021-03-27 21:03:43 -04:00
make-pot l10n: Remove po/pot for dropped nicks/blurbs 2022-05-11 17:36:07 +02:00
make-release.sh Actually build docs for releases 2021-03-30 11:00:54 -04:00
meson_options.txt Tweak the vulkan option description 2022-08-23 08:27:24 -04:00
meson.build 4.8.1 2022-09-16 12:29:33 -04:00
NEWS 4.8.1 2022-09-16 12:29:33 -04:00
NEWS.pre-1.0 Split NEWS 2018-01-10 19:06:45 -05:00
NEWS.pre-2.0 Split NEWS 2018-01-10 19:06:45 -05:00
NEWS.pre-3.0 Split NEWS 2018-01-10 19:06:45 -05:00
NEWS.pre-4.0 Split NEWS for pre-4.0 changes 2021-01-19 10:40:09 +01:00
README.md Mention main in NEWS and README.md 2021-11-29 17:42:40 -05:00

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 a free and open-source software project. 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.

GTK is hosted by the GNOME project (thanks!) and used by a wide variety of applications and projects.

The official download location

The official web site

The official developers blog

Discussion forum

Nightly documentation can be found at

Nightly flatpaks of our demos can be installed from the GNOME Nightly repository:

  • flatpak remote-add --if-not-exists gnome-nightly https://nightly.gnome.org/gnome-nightly.flatpakrepo
  • flatpak install gnome-nightly org.gtk.Demo4
  • flatpak install gnome-nightly org.gtk.WidgetFactory4
  • flatpak install gnome-nightly org.gtk.IconBrowser4

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

Default branch renamed to main

The default development branch of GTK has been renamed to main. To update your local checkout, use:

git checkout master
git branch -m master main
git fetch
git branch --unset-upstream
git branch -u origin/main
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main

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.

If you want to support GTK financially, please consider donating to the GNOME project, which runs the infrastructure hosting 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