Prerequisite and License

Prerequisite

GTK 4 on a Linux OS

This tutorial is about GTK 4 libraries. It is originally used on Linux with C compiler, but now it is used more widely, on Windows and MacOS, with Vala, Python and so on. However, this tutorial describes only C programs on Linux.

If you want to try the examples in the tutorial, you need:

PC with Linux distribution like Ubuntu or Debian.
GCC.
GTK 4. The stable version of GTK is 4.8.2 at present (13/Dec/2022), but older version (4.0 or higher) may work. See Section 2 for the installation for GTK 4.

Ruby and rake for making the document

This repository includes Ruby programs. They are used to make GFM (GitHub Flavoured Markdown) files, HTML files, Latex files and a PDF file.

You need:

Linux.
Ruby programming language. There are two ways to install it. One is installing the distribution’s package. The other is using rbenv and ruby-build. If you want to use the latest version of ruby, use rbenv.
Rake. You don’t need to install it separately because it is a standard library of Ruby.

License

GTK4-tutorial repository contains tutorial documents and programs such as converters, generators and controllers. All of them make up the ‘GTK4-tutorial’ package. This package is simply called ‘GTK4-tutorial’ in the following description.

GTK4-tutorial is free; you can redistribute it and/or modify it under terms of the following licenses.

The license of documents in GTK4-tutorial is the GNU Free Documentation License as published by the Free Software Foundation; either version 1.3 of the License or, at your opinion, any later version. The documents are Markdown, HTML and image files. If you generate a PDF file by running rake pdf, it is also included by the documents.
The license of programs in GTK4-tutorial is the GNU General Public License as published by the Free Software Foundation; either version 3 of the License or, at your option, any later version. The programs are written in C, Ruby and other languages.

GTK4-tutorial is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU License web pages for more details.

The licenses above is effective since 15/April/2023. Before that, GPL covered all the contents of the GTK4-tutorial. But GFDL1.3 is more appropriate for documents so the license was changed. The license above is the only effective license since 15/April/2023.