Toward GTK 4

[vmagnin]

The GTK+ team has just released GTK+ 3.22:
https://mail.gnome.org/archives/gnome-announce-list/2016-September/msg00044.html

The 3.22 release is the last development release in the GTK+ 3. series.
GTK+ 3.22 will be maintained as the long-term stable version of GTK+ 3,
and new development will move to the GTK+ 3.90.x releases.

This move toward GTK+ 4.0 is detailed here:
https://blog.gtk.org/2016/09/01/versioning-and-long-term-stability-promise-in-gtk/

The GTK+ blog shows that Red Hat is a major contributor:
https://blog.gtk.org/

The GNOME Discourse:
https://discourse.gnome.org/c/platform

The good health of GTK+ assures that gtk-fortran can be perennial, which is a major point for a Fortran user. We will maintain gtk-fortran as new GTK+ versions land in our Linux distribution.

[vmagnin]

Gtk+ 3.92.1 was released in October 2017:
https://blog.gtk.org/2017/10/23/gtk-3-92/

GTK News :
https://gitlab.gnome.org/GNOME/gtk/-/blob/master/NEWS

The GTK+ 4 todo list is here:
https://gitlab.gnome.org/GNOME/gtk/-/milestones/1

Other regular news from GTK+ 4:
https://www.phoronix.com/scan.php?page=search&q=GTK4
Latests messages talk about a possible release at the 2018 fall.

[vmagnin]

"GTK+ 4.0 Likely Being Released In Spring Of 2019":
https://www.phoronix.com/scan.php?page=news_item&px=GTK-4.0-Spring-2019-Plans

[vmagnin]

The "GTK+" project has been renamed "GTK":
https://www.phoronix.com/scan.php?page=news_item&px=GTK4-Development-2019-Stretch

[vmagnin]

Migrating from GTK 3.x to GTK 4:
https://developer.gnome.org/gtk4/unstable/gtk-migrating-3-to-4.html

GTK+ 4 is a major new version of GTK+ that breaks both API and ABI compared to GTK+ 3.x.

[vmagnin]

The src/cfwrapper.py now detects the status of functions (DEPRECATED or AVAILABLE) and writes it in the third column of the src/gtk-fortran-index.csv file.

The src/usemodules.py script uses it to detect deprecated functions in your .f90 files. After launching it on the whole project, it appears that around 20 files contain deprecated functions, mainly in the High Level part of the library. These deprecated functions will be removed in GTK 4, so we need to remove them from gtk-fortran.

We will post an issue for each group of files.

[vmagnin]

GTK 3.94.0-1, a preversion of GTK 4 dating back to 2018-06-28, is available in the following distributions:

• Fedora 29,
• Manjaro 18.0 (AUR repository): https://aur.archlinux.org/packages/gtk4

[vmagnin]

GTK 3.96.0 released: https://blog.gtk.org/2019/05/08/gtk-3-96-0/

[vmagnin]

GTK 4.0 could be released in fall 2020, after two more 3.9x releases: https://blog.gtk.org/2019/08/29/gtk-bof-at-guadec/

[vmagnin]

GTK 3.98.0 has been released : https://gitlab.gnome.org/GNOME/gtk/blob/master/NEWS
A package is available in Manjaro 18.1.5 (AUR packages).

[vmagnin]

GTK 3.98.2 has been released: https://blog.gtk.org/2020/04/01/gtk-3-98-2/

[vmagnin]

New gtk4 development branch, based on GTK 3.98.2 in Fedora 32. You can build it using:

$ cmake -D NO_BUILD_HL=true ..
$ make -i
$ sudo make -i install

At this time, the only working examples are gtkzero_gapp.f90, gtkhello.f90, gio_demo.f90, tests.f90.
Because, there is so many thing to change in the whole project, I am compiling each example indivually with:

$ gfortran gtkhello.f90 -Wall -Wextra -std=f2003 -pedantic $(pkg-config --cflags --libs gtk-4-fortran --with-path=/usr/local/lib64/pkgconfig/) && ./a.out

[vmagnin]

cairo-tests.f90 is now working with GTK 3.98.3 under Fedora 32.
A new version of cairo-basics-click.f90 using GtkEventController and GtkGesture has been written.

An overview of examples ported to GTK 4 is now available in issue #189

[vmagnin]

The GTK 4.0.0 milestone has just been set: https://gitlab.gnome.org/GNOME/gtk/-/blob/master/NEWS