Blueprint is a currently-experimental markup language and compiler for crafting GTK4 user interfaces. Blueprint allows declaratively creating GTK UIs and aims to be a very easy and nice developer experience.
This Week in GNOME noted that the Blueprint markup language is now included within the GNOME Nightly SDK. Additionally, Blueprint is expected to be added to the upcoming GNOME 49 SDK. Blueprint is described in This Week in GNOME as:
“Blueprint is an alternative to defining GTK/Libadwaita user interface via .ui XML-files (GTK Builder files). The goal of blueprint is to provide UI definitions that require less boilerplate than XML and are easier to learn. Blueprint also provides a language server for IDE integration.
Many of our GNOME Circle apps are already built with blueprint, as well as some Core and Incubator apps.”
Those wishing to learn more about the Blueprint markup language can do so via the GNOME documentation, here’s a code snippet example:
Besides Blueprint being added to the GNOME Nightly SDK, some other items noted by This Week in GNOME include the GNOME Calendar finally seeing work to support keyboard-based navigation, Musicus seeing its initial release as a new GNOME music player focused on classical music, and the release of Frctal 11.