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Radial Progress for Slint

KitRadialProgress · Slint Kit 0.3.0

Circular progress indicator with a central percentage.

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Try the component

Download the complete project, extract it and run cargo run --locked in its folder. Rust 1.92+; Slint Kit 0.3.0 from crates.io. You can also copy the four files below.

Advance upload in 25% steps; Rust publishes a bounded progress value.

ui/app.slint

export { KitFormValidation, HtmlInputKind, NumberInputFormat, KitInputConstraints, KitValidationResult, KitValidityState } from "@kit/kit.slint";
// SPDX-License-Identifier: GPL-3.0-or-later
import { KitRadialProgress, KitButton, KitTheme, KitThemes } from "@kit/kit.slint";
export component App inherits Window {
    title: "KitRadialProgress example";
    preferred-width: 520px;
    preferred-height: 300px;
    max-width: 100000px;
    max-height: 100000px;
    background: root.theme.canvas;
    in-out property <KitTheme> theme: KitThemes.light;
    in property <int> percent;
    callback advance();
    VerticalLayout {
        padding: 24px;
        spacing: 16px;
        alignment: start;
        control := KitRadialProgress { theme: root.theme; label: "Upload"; value: root.percent / 100; }
        KitButton { theme: root.theme; text: "Advance upload"; activated => { root.advance(); } }
        result := Text { text: root.percent + "% uploaded"; color: root.theme.text-primary; }
    }

}

src/main.rs

// SPDX-License-Identifier: GPL-3.0-or-later
use slint::ComponentHandle;

mod ui { slint::include_modules!(); }
fn main() -> Result<(), slint::PlatformError> {
    let app = ui::App::new()?;
    slint_kit::init_form_validation!(ui, app);
    let weak = app.as_weak();
    app.on_advance(move || { if let Some(app) = weak.upgrade() { app.set_percent((app.get_percent() + 25).min(100)); } });
    app.run()
}

[package]
name = "slint-kit-radial-progress-example"
version = "0.1.0"
edition = "2024"
rust-version = "1.92"
license = "GPL-3.0-or-later"
publish = false

[dependencies]
slint-kit = "=0.3.0"
slint = { version = "=1.18.1", default-features = false, features = ["std", "compat-1-18", "backend-winit", "renderer-skia", "accessibility"] }

[build-dependencies]
slint-kit-build = "=0.3.0"

[workspace]

fn main() { slint_kit_build::compile("ui/app.slint").expect("compile component example"); }

Files: Cargo.toml · build.rs · ui/app.slint · src/main.rs

Supply value from 0 to 1 and a label describing the tracked task. Use it when a circular presentation suits the layout better than a bar.

Like KitProgress, it exposes bounded-value and a progress role from 0 to 100. The displayed percentage is a rounded projection of supplied state.

View source ↗

Choose between built-in options and custom composition

Shared options

• label — built-in property; custom composition example

Visual composition

The file below produces the screenshot. For controller-driven components, it shows the displayed state without supplying the Rust wiring. Create a project.

Show the screenshot source

// SPDX-License-Identifier: GPL-3.0-or-later
import { KitRadialProgress, KitTheme, KitThemes } from "@kit/kit.slint";

export component Example inherits Window {
    title: "KitRadialProgress example";
    preferred-width: 320px;
    preferred-height: 230px;
    max-width: 100000px;
    max-height: 100000px;
    background: root.theme.canvas;
    in-out property <KitTheme> theme: KitThemes.light;
    in-out property <string> status;
    VerticalLayout {
        padding: 24px; spacing: 16px; alignment: start;
        Text { text: "Radial Progress"; color: root.theme.text-primary; font-size: 20px * root.theme.text-scale; font-weight: 600; }
        KitRadialProgress { theme: root.theme; label: "Upload progress"; value: 0.72; }
        if root.status != "": Text { text: root.status; color: root.theme.text-secondary; font-size: 12px * root.theme.text-scale; wrap: word-wrap; }
    }
}

Download this example

Public API

Inherits Rectangle.

Properties

See also

• Progress
• Spinner