egui_knob

Simple knob widget for egui.

Features

• Adjustable size, font size, and stroke width.
• Customizable colors for the knob, indicator and text.
• Label positions (Top, Bottom, Left, Right).
• Label formatting.
• Two styles: Wiper and Dot.

Installation

To use the Knob widget in your project, add the following to your Cargo.toml:

[dependencies]

egui = "0.32"

egui_knob = "0.3.3"

Usage example

use egui_knob::{Knob, KnobStyle, LabelPosition};
use eframe::{egui};

struct KnobApp {
    value: f32,
}

impl Default for KnobApp {
    fn default() -> Self {
        Self { value: 0.5 }
    }
}

impl eframe::App for KnobApp {
    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
        egui::CentralPanel::default().show(ctx, |ui| {
            let knob = Knob::new(&mut self.value, 0.0, 1.0, KnobStyle::Wiper)
                .with_size(50.0)
                .with_font_size(14.0)
                .with_colors(egui::Color32::GRAY, egui::Color32::WHITE, egui::Color32::WHITE)
                .with_stroke_width(3.0)
                .with_label("Volume", LabelPosition::Top);

            ui.add(knob);
        });
    }
}

fn main() {
    let options = eframe::NativeOptions::default();
    eframe::run_native(
        "Minimal",
        options,
        Box::new(|_cc| Ok(Box::new(KnobApp::default()) as Box<dyn eframe::App>)),
    ).unwrap();
}