I’m a System76 engineer / Pop!_OS maintainer. I’ve been a Linux user since 2007; and Rust since 2015. I’m currently working on COSMIC-related projects.
No, we have been making our own platform toolkit (libcosmic), which is built upon iced-rs. We are using this both for our wayland compositor applets, and our desktop applications.
COSMIC is a Wayland desktop environment for Linux that is written in Rust with Smithay and Iced. COSMIC applications are developed with the libcosmic platform toolkit, which is based on iced. They are cross-platform and supported on Windows, Mac, and Redox OS in addition to Linux....
COSMIC: The Road to Alpha (blog.system76.com)
In-progress COSMIC apps: terminal, file manager, text editor, and settings (fosstodon.org)
COSMIC is a Wayland desktop environment for Linux that is written in Rust with Smithay and Iced. COSMIC applications are developed with the libcosmic platform toolkit, which is based on iced. They are cross-platform and supported on Windows, Mac, and Redox OS in addition to Linux....