gtk+  3.24.27
About: GTK+ 3 (the GIMP Toolkit; version 3) is a library for creating graphical user interfaces for the X Window System.
  Fossies Dox: gtk+-3.24.27.tar.xz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

gtk+ Documentation

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the steelblue colored "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies gtk+-3.24.27.tar.xz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).

General Information

This is GTK+ version 3.24.27. 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 locations are:

The official web site is:

Information about mailing lists can be found at


See the file 'INSTALL'

How to report bugs

Bugs should be reported to the GNOME bug tracking system. (, product glib.) You will need to create an account for yourself.

In the bug report please include:

  • Information about your system. For instance:

    • What operating system and version
    • For Linux, what version of the C library

    And anything else you think is relevant.

  • How to reproduce the bug.

    If you can reproduce it with 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.


Patches should also be submitted to If the patch fixes an existing bug, add the patch as an attachment to that bug report.

Otherwise, enter a new bug report that describes the patch, and attach the patch to that bug report.

Patches should be in unified diff form. (The -up option to GNU diff) Even better are git-formatted patches. (Use git format-patch)

Release notes

Release notes for releases of GTK+ 3.x are part of the migration guide in the GTK+ documentation. See