Bevy_ratatui

An experiment using Ratatui from within a Bevy app. Note that this library is explicitly unstable and will break compatibility between 0.x versions.

The goal of this (at least to start) is not to do any rendering / 3D / etc. in the terminal, but just to see how useful it is to use the bevy concepts for apps. This may change over time.

Example app

This app demonstrates:

• Using the RatatuiContext resource to draw widgets to the terminal
• ScheduleRunnerPlugin to run the app loop
• Using Events to communicate
• Handling States to add logic that runs on transition (e.g. changing the background color when going from Negative to Positive in a simple counter app)

cargo run --example demo

Keys:

• Left / Right - modify the counter (look at what happens when you go negative)
• Q / Esc - quit
• P - simulate a panic (tests the color_eyre panic hooks)

Compatible Bevy versions

Ideas on progressing this

• Rewrite Ratatui's Terminal as a Bevy SubApp. It's possible that this would allow rendering to happen while the main app is continuing to run
• Consider how to handle layout. Bevy has a lot of code related to this which might be possible to incorporate
• Convert Crossterm events into the bevy standard
• Collab with the other bevy/crossterm/ratatui libs
  • https://github.com/cxreiff/bevy_rat - seems like the most recent / up to date crate with some fairly similar ideas. Has some stuff for rendering images to the screen (e.g. spinning 3D cube).
  • https://github.com/octotep/bevy_crossterm - Crossterm plugin for the bevy game engine
  • https://github.com/TheEmeraldBee/widgetui - A bevy systems like widget system for ratatui and crossterm. This is a bevy-like approach (not actual bevy) and has some neat ideas about Widgets
  • https://github.com/AlephAlpha/roguelike-bevy-crossterm - takes the approach of defining a custom runner to handle the event loop to make a roguelike game
  • https://github.com/Mimea005/bevyterm - A bevy renderer for the terminal using crossterm that does not use a custom runner like bevy_crossterm.
  • https://github.com/gold-silver-copper/bevy_ratatui - is sort of the opposite of this idea. It runs a Ratatui app using bevy as the backend to draw to a graphical window / webpage target
  • https://github.com/gold-silver-copper/ratatui_egui_wasm - continuation of the previous with a egui backend to render ratatui apps to the web
  • https://github.com/sstelfox/bevy_tui - tui-rs / bevy seems dead (last commit Jan 2023)

Previous bevy_ratatui crate

Previously there was another crate using this name which has since migrated to ratatui_egui_wasm. A ratatui backend that is also an egui widget. Deploy on web with WASM or ship natively with bevy, macroquad, or eframe. Demo at https://gold-silver-copper.github.io/

License

Copyright (c) Josh McKinney

This project is licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

See CONTRIBUTING.md.