The library is an extension of GtkAda dealing with the following issues:

- Tasking support;
- Custom models for tree view widget;
- Custom cell renderers for tree view widget;
- Multi-columned derived model;
- Extension derived model (to add columns to an existing model);
- Abstract caching model for directory-like data;
- Tree view and list view widgets for navigational browsing of abstract
caching models;
- File system navigation widgets with wildcard filtering;
- Resource styles;
- Capturing resources of a widget;
- Embeddable images;
- Some missing subprograms and bug fixes;
- Measurement unit selection widget and dialogs;
- Improved hue-luminance-saturation color model;
- Simplified image buttons and buttons customizable by style properties;
- Controlled Ada types for GTK+ strong and weak references;
- Simplified means to create lists of strings;
- Spawning processes synchronously and asynchronously with pipes;
- Capturing asynchronous process standard I/O by Ada tasks and by text
buffers;
- Source view widget support;
- SVG images support.

http://www.dmitry-kazakov.de/ada/gtkada_contributions.htm

Changes (18 December 2023) to the version 3.31:

- Get_CSS_Name and Set_CSS_Name were added to Gtk.Missed;
- Gtk.Widget.Styles.CSS_Store changed to enumerate labels of
Gtk_Notebook or its descendants;
- Since Gtk broke its CSS rules and the widget class cannot be used in
the CSS style anymore and because unset widget names are defaulted to
the class name but have no effect on the style name,
Gtk.Widget.Styles.CSS_Store was changed to report only the widget name
if different from the class names.

--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de