This is the second post in a series of reports on the progress of GTK 4 Rust Bindings. You can find project links and repositories on the about page.

This development cycle focuses on gtk4-rs itself, while I continue to add more objects from gdk4 and gsk4 where needed. Another highlight is setting up continuous integration.

gtk4-rs

The original plan for gtk4-rs includes adding some remaining objects that initially prevented gir codegen (mostly missing memory management), but many of them turned out to be private objects, implementation details, or otherwise supposed to be used within C. Objects that are useful among them were implemented manually.

Another part of the change is integrating existing manually-implemented bindings from gtk3. Despite differences between gtk3 and gtk4, they do share a considerable amount of code.

Continuous Integration

It became neccessary to set up CI when the project structure began to stabilize. After some try-and-error, I enabled CI for linux targets with gtk 3.96 (pre-release version), and rust 1.34.0 (stable), beta, and nightly. Without the distro providing gtk4, the entire gtk dependencies are built from source and stored in this repo. Apart from keeping the project coherent itself, CI also helps track upstream changes. Many errors were found immediately after it went up.

Misc.

Other changes include retroactive bugfixes in gtk3-rs & gtk4-rs, and adapting to new upstream Boxed models.