A library to write GTK applications that use Layer Shell. Layer Shell is a Wayland protocol for desktop shell components, such as panels, notifications and wallpapers. You can use it to anchor your windows to a corner or edge of the output, or stretch them across the entire output. It supports all Layer Shell features including popups and popovers (GTK popups Just Work™). This Library is compatible with C, C++ and any language that supports GObject introspection files (Python, Vala, etc, see using the library below).
To report a crash or other problem using this library open a new issue on Github. Try to include a minimum reproducer if possible (ideally in C). DO NOT REPORT GTK LAYER SHELL BUGS TO UPSTREAM GTK. If you can reproduce the problem without including or linking to the gtk-layer-shell library at all then and only then report it to GTK instead of here.
This library only works on Wayland, and only on Wayland compositors that support the Layer Shell protocol. Layer shell is supported on:
- wlroots based compositors (such as Sway)
- KDE Plasma on wayland
- Mir-based compositors (some may not enable the protocol by default and require
Layer shell is not supported on:
- Any X11 desktop
gtk-layer-demo is built if examples are enabled. Its UI exposes all features of the library, and it's useful for testing layer shell support in compositors. Its code can be found in examples/demo/.
The easiest way to build against GTK Layer Shell is to use the
gtk-layer-shell-0 pkg-config package. Refer to your build system or the pkg-config docs for further instructions. examples/simple-example.c is a minimal complete app written in C.
examples/simple-example.py contains sample Python code.
- Clone this repo
- Install build dependencies (see below)
$ meson setup -Dexamples=true -Ddocs=true -Dtests=true build
$ ninja -C build
$ sudo ninja -C build install
$ sudo ldconfig
- Meson (>=0.45.1)
- libwayland (>=1.10.0)
- GTK3 (>=3.22.0)
- GObject introspection
- GTK Doc (only required if docs are enabled)
- Vala (only required if vapi is enabled)
To install these dependencies on Ubuntu 18.04 and later:
sudo apt install meson libwayland-dev libgtk-3-dev gobject-introspection libgirepository1.0-dev gtk-doc-tools valac
false): If to build the example C apps; gtk-layer-demo is installed if examples are built; The Vala example is never built with the rest of the project
false): If to generate the docs
false): If to build the tests
true): If to build GObject Introspection data (used for bindings to languages other than C/C++)
true): If to build VAPI data (allows this library to be used in Vala). Requires
ninja -C build test
GTK Layer Shell is licensed under the GNU Lesser General Public License version 3.0 or any later version.
Most of the individual source files are licensed under MIT.
To prevent possible future confusion, all contributions must contain the following in the PR message: By opening this pull request, I agree for my modifications to be licensed under whatever licenses are indicated at the start of the files I modified
I want everyone to be able to use GTK Layer Shell however they desire, but parts of it are extracted from GTK. Therefore, the project as a whole is licensed under GNU Lesser General Public License (LGPL) version 3 or any later version (a newer version of the same license as GTK). See LICENSE_LGPL.txt and LICENSE_GPL.txt for details. Almost all of the non-generated code, however, is licensed under MIT (LICENSE_MIT.txt). At the top of each file should be a header that specifies which license applies to it. Please refer to that if in doubt.
This library can be linked against under similar terms as GTK itself, so licensing shouldn't be a problem for most potential users. Furthermore, most of the code within this library can be used in permissively licensed or proprietary projects.