w-gui-0.21.3 has been yanked.

w-gui

A lightweight immediate-mode debug GUI served over localhost.

Overview

w-gui provides an in-process GUI framework for real-time parameter updates and visualization. Access the interface through a web browser on localhost. The visual design is heavily inspired by https://www.youtube.com/@PezzzasWork

Features

Immediate-mode API
WebSocket-based communication
Color pickers
Sliders
Windows and panels
Zero external UI dependencies

Usage

let mut ctx = wgui::Context::new();
let mut color = [1.0f32, 0.0, 0.5];
let mut speed = 5.0f32;

loop {
    let mut win = ctx.window("Utils");
    win.color_picker("My Color", &mut color);
    win.slider("Speed", &mut speed, 0.0..=10.0);
    drop(win);
    ctx.end_frame();
    // ... your application frame ...
}

Access the GUI at http://localhost:9080 (port configurable).

Requirements

Rust 1.56+

Examples