We have more plans to improve things on the website such as business support around GTK+ which is not really obvious enough on the current website. As part of the updates to the new website, we now list more recently established maintainers of the toolkit (seen on the Development page).

Noteworthy changes:

• GtkSpinner, GtkCellRendererSpinner – A new widget that renders a ‘spinner’ animation to indicate ongoing activity. The corresponding cell renderer renders the same animation inside a treeview
• GtkOffscreenWindow – A new toplevel container widget to manage offscreen rendering of child widgets
• GtkNotebook – You can now show ‘action widgets’ in the space that is not occupied by tabs. This functionality is also available in GtkBuilder via the ‘action-start’ and ‘action-end’ child types.
• Filechooser – GtkFileSystemModel has been reimplemented, for major speedup and simplifications.
• Keyboard handling – The compose sequences understood by the builtin input method have been synced with X.org, and the additional sequences have been rationalized
• Mnemonic underlines – Can now optionally be hidden until the Alt key is pressed, this can be turned on with the gtk-auto-mnemonics setting
• Keyboard accelerators – The Super, Meta and Hyper modifiers are working more reliably
• GDK – There is a new function to get the ‘primary’ monitor in multi-monitor setups: gdk_screen_get_primary_monitory.
• gdk-pixbuf – Embedded color profiles in png and tiff images can be stored and retrieved. Support for the QTIF image format has been added
• Win32 – XP themes have been disabled since they don’t work
• OS X – GTK+ uses standard Mac keyboard shortcuts (Cmd-X/Cmd-C instead of Ctrl-X/Ctrl-C, etc). The handling of multi-monitor setups has been greatly improved
• Introspection support – Introspection data is now included in GTK+ itself. As a consequence, a dependency on gobject-introspection has been added

• The requirements for g_thread_init() have been relaxed slightly, it can be called multiple times, and does not have to be the first call. GObject now links to GThread and threads are enabled automatically when g_type_init() is called. Thread-safety issuesvwith boxed types in GObject have been fixed. The -pthread flag has been added to all gmodule .pc files, because it is not generally permissible to load modules that are linked against libpthread if the program has not been compiled with threading support.
• GType now has a G_DEFINE_INTERFACE convenience macro
• GIO supports lazy loading of GIO modules, and there is a new gio-querymodule utility that goes along with this. Packagers will need to adapt to this.
• GIO uses splice(2) to transfer data between file descriptors without extraneous copies.
• The GVariant variant datatype has been added.

Overview of Changes from GLib 2.21.2

• GMappedFile is refcounted now
• Mainloop: It is now possible to set per-thread default contexts, with g_main_context_push_thread_default.
• glib-mkenums supports a @basename@ substitution, in addition to @filename
• GIO:
  • Vfs implementations can support storing of per-file metadata.
  • GCancellable can now be subclassed.
  • Unmount and eject methods now optionally allow interaction, via variants that take a GMountOperation object.

11 bugs fixed in this release!

See the original announcement for more info and downloads.

See the original announcement for more info and downloads.

9 bugs fixed in this release!

See the original announcement for more info and downloads.

9 bugs fixed in this release!

See the original announcement for more info and downloads.