# ratframe : egui widget + ratatui backend (WASM)
[](https://crates.io/crates/ratframe)
[](https://docs.rs/ratframe/latest/ratframe/)
[](https://github.com/bevyengine/bevy/blob/master/LICENSE)
[](https://crates.io/crates/ratframe)
lol
See bevy and macroquad folders for game engine examples
See also:
https://ratatui.rs/
https://github.com/emilk/egui
RataguiBackend is the name of the backend/widget in code
`cargo add ratframe`
`git clone https://github.com/gold-silver-copper/ratatui_egui_wasm.git`
`cd ratatui_egui_wasm`
This repo provides the Ratagui Backend, which is also a Widget for egui. So you can have a whole ratatui terminal inside of egui. Also since egui is so WASM compatible, this means we can use this to compile ratatui to WASM !
Look at examples, you can run the basic ones by doing
`cargo run --example hello_world_minimum`
To run a web version, enter an example directory such as demo_web or colors_web , then simply execute in the directory 'trunk serve'
`cd examples/demo_web`
`trunk serve`
or to build
`trunk build --release`



The goal is for this to be the simplest way to write a TUI app for WASM in Rust. You can compile your app natively or for the web, and share it using Github Pages.
You can remove the eframe dependency and use another backend such as bevy or macroquad by setting default-features = false for ratframe
Here is the simplest hello world
```rust
use eframe::egui::{self};
use ratatui::{
prelude::{Stylize, Terminal},
widgets::Paragraph,
};
use ratframe::RataguiBackend;
pub fn main() {
let options = eframe::NativeOptions {
viewport: egui::ViewportBuilder::default().with_inner_size([320.0, 240.0]),
..Default::default()
};
let boop = RataguiBackend::new(100, 50);
let mut terminal = Terminal::new(boop).unwrap();
terminal.clear().expect("epic fail");
eframe::run_simple_native("My egui App", options, move |ctx, _frame| {
terminal
.draw(|frame| {
let area = frame.size();
frame.render_widget(Paragraph::new("Hello Rataguiii").white().on_blue(), area);
})
.expect("epic fail");
egui::CentralPanel::default().show(ctx, |ui| {
ui.add(terminal.backend_mut());
if ui.input(|i| i.key_released(egui::Key::Q)) {
panic!("HAVE A NICE WEEK");
}
});
})
.expect("epic fail");
}
```
REST IS FROM ETEMPLATE DOCS
## Getting started
Start by clicking "Use this template" at https://github.com/emilk/eframe_template/ or follow [these instructions](https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/creating-a-repository-from-a-template).
Change the name of the crate: Chose a good name for your project, and change the name to it in:
- `Cargo.toml`
- Change the `package.name` from `eframe_template` to `your_crate`.
- Change the `package.authors`
- `main.rs`
- Change `eframe_template::TemplateApp` to `your_crate::TemplateApp`
- `index.html`
- Change the `<title>eframe template</title>` to `<title>your_crate</title>`. optional.
- `assets/sw.js`
- Change the `'./eframe_template.js'` to `./your_crate.js` (in `filesToCache` array)
- Change the `'./eframe_template_bg.wasm'` to `./your_crate_bg.wasm` (in `filesToCache` array)
### Learning about egui
`src/app.rs` contains a simple example app. This is just to give some inspiration - most of it can be removed if you like.
The official egui docs are at <https://docs.rs/egui>. If you prefer watching a video introduction, check out <https://www.youtube.com/watch?v=NtUkr_z7l84>. For inspiration, check out the [the egui web demo](https://emilk.github.io/egui/index.html) and follow the links in it to its source code.
### Testing locally
Make sure you are using the latest version of stable rust by running `rustup update`.
`cargo run --release`
On Linux you need to first run:
`sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev`
On Fedora Rawhide you need to run:
`dnf install clang clang-devel clang-tools-extra libxkbcommon-devel pkg-config openssl-devel libxcb-devel gtk3-devel atk fontconfig-devel`
### Web Locally
You can compile your app to [WASM](https://en.wikipedia.org/wiki/WebAssembly) and publish it as a web page.
We use [Trunk](https://trunkrs.dev/) to build for web target.
1. Install the required target with `rustup target add wasm32-unknown-unknown`.
2. Install Trunk with `cargo install --locked trunk`.
3. Run `trunk serve` to build and serve on `http://127.0.0.1:8080`. Trunk will rebuild automatically if you edit the project.
4. Open `http://127.0.0.1:8080/index.html#dev` in a browser. See the warning below.
> `assets/sw.js` script will try to cache our app, and loads the cached version when it cannot connect to server allowing your app to work offline (like PWA).
> appending `#dev` to `index.html` will skip this caching, allowing us to load the latest builds during development.
### Web Deploy
1. Just run `trunk build --release`.
2. It will generate a `dist` directory as a "static html" website
3. Upload the `dist` directory to any of the numerous free hosting websites including [GitHub Pages](https://docs.github.com/en/free-pro-team@latest/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site).
4. we already provide a workflow that auto-deploys our app to GitHub pages if you enable it.
> To enable Github Pages, you need to go to Repository -> Settings -> Pages -> Source -> set to `gh-pages` branch and `/` (root).
>
> If `gh-pages` is not available in `Source`, just create and push a branch called `gh-pages` and it should be available.
>
> If you renamed the `main` branch to something else (say you re-initialized the repository with `master` as the initial branch), be sure to edit the github workflows `.github/workflows/pages.yml` file to reflect the change
>
> ```yml
> on:
> push:
> branches:
> - <branch name>
> ```
You can test the template app at <https://emilk.github.io/eframe_template/>.
## Updating egui
As of 2023, egui is in active development with frequent releases with breaking changes. [eframe_template](https://github.com/emilk/eframe_template/) will be updated in lock-step to always use the latest version of egui.
When updating `egui` and `eframe` it is recommended you do so one version at the time, and read about the changes in [the egui changelog](https://github.com/emilk/egui/blob/master/CHANGELOG.md) and [eframe changelog](https://github.com/emilk/egui/blob/master/crates/eframe/CHANGELOG.md).