tunapanel: Autogenerate live Web-based control panels

API documentation

tunapanel lets you quickly and easily generate a Web-based panel for controlling the behavior of a running Rust program, locally or over the network. You simply declare a struct representing all of the panel state, and a callback for updates.

A simple example, from examples/basic.rs:

#[macro_use] extern crate serde_derive;
#[macro_use] extern crate tunapanel;

use tunapanel::widget::Button;

tunapanel! {
    #[title = "My awesome panel"]
    #[derive(Debug)]
    struct Panel {
        #[label = "A float"]
        x: f32 = 0.0,

        #[label = "A string"]
        y: String = String::new(),

        #[label = "A bool"]
        b: bool = true,

        #[label = "A button"]
        but1: Button = Button::new(),

        #[label = "Another button"]
        but2: Button = Button::new(),
    }
}

fn main() {
    tunapanel::serve::<Panel, _>(|p| {
        println!("Panel update: {:?}", p);
    }).unwrap();
}

Build and run this and it will output something like:

Listening on 127.0.0.1:1337

You can now navigate to http://127.0.0.1:1337 in your favorite Web browser and you will see something similar to:

When you modify these form elements, the Rust program receives updates in realtime. Here we just print them:

Panel update: Panel { x: 0.3, y: "Hello w", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello w", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello wor", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: true, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: false, but1: Button(false), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: false, but1: Button(true), but2: Button(false) }
Panel update: Panel { x: 0.3, y: "Hello world!", b: false, but1: Button(false), but2: Button(true) }

If any field fails to parse, the interface will display a "Failure" indication. You can try again immediately.