Choices and values

Segmented Control for Slint

KitSegmentedControl · Slint Kit 0.3.1

Compact exclusive choice presented as segments.

Run preview

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.

Select Activity: Rust accepts the key and redraws the selected item.

ui/app.slint

export { KitFormValidation, HtmlInputKind, NumberInputFormat, KitInputConstraints, KitValidationResult, KitValidityState } from "@kit/kit.slint";
// SPDX-License-Identifier: GPL-3.0-or-later
import { KitSegmentedControl, OptionRow, SelectState, NavigationStep, CloseReason, SelectionAvailability, KitTheme, KitThemes } from "@kit/kit.slint";
export component App inherits Window {
    title: "KitSegmentedControl example";
    preferred-width: 520px;
    preferred-height: 240px;
    max-width: 100000px;
    max-height: 100000px;
    background: root.theme.canvas;
    in-out property <KitTheme> theme: KitThemes.light;
    in property <[OptionRow]> rows;
    in property <SelectState> select-state;
    in property <string> selected-label: "Overview";
    in-out property <string> query;
    callback select-open();
    callback select-navigate(NavigationStep);
    callback select-activate(int, int);
    callback select-dismiss(CloseReason);
    callback select-query(string);
    callback select-typeahead(string);
    VerticalLayout {
        padding: 24px;
        spacing: 16px;
        alignment: start;
        control := KitSegmentedControl {
            theme: root.theme; label: "Destination";
            rows: [{ token: root.rows[0].token, label: root.rows[0].label, disabled: false, selected: root.select-state.selected.present && root.select-state.selected.token == root.rows[0].token }, { token: root.rows[1].token, label: root.rows[1].label, disabled: false, selected: root.select-state.selected.present && root.select-state.selected.token == root.rows[1].token }, { token: root.rows[2].token, label: root.rows[2].label, disabled: false, selected: root.select-state.selected.present && root.select-state.selected.token == root.rows[2].token }];
            generation: root.select-state.generation; active-token: root.select-state.active.token;
            navigate(step) => { root.select-navigate(step); }
            activate(token, generation) => { root.select-activate(token, generation); }
        }
        result := Text { text: "Selected: " + root.selected-label; color: root.theme.text-primary; }
    }

}

src/main.rs

// SPDX-License-Identifier: GPL-3.0-or-later
use slint::ComponentHandle;
use slint_kit::{Ownership, SelectOption, SelectionIntent};
#[derive(Clone, Copy, PartialEq, Eq, Hash)]
enum Destination { Overview, Activity, Settings }
impl Destination {
    fn label(self) -> &'static str {
        match self { Self::Overview => "Overview", Self::Activity => "Activity", Self::Settings => "Settings" }
    }
}

mod ui { slint::include_modules!(); }
fn main() -> Result<(), slint::PlatformError> {
    let app = ui::App::new()?;
    slint_kit::init_form_validation!(ui, app);
    let selection = slint_kit::bind_select!(ui, app, vec![
        SelectOption::new(Destination::Overview, "Overview"),
        SelectOption::new(Destination::Activity, "Activity"),
        SelectOption::new(Destination::Settings, "Settings"),
    ], Some(Destination::Overview), Ownership::Local);
    let weak = app.as_weak();
    selection.on_intent(move |intent| {
        if let Some(app) = weak.upgrade() {
            app.set_selected_label(match intent {
                SelectionIntent::Commit(key) => key.label(),
                SelectionIntent::Clear => "No selection",
            }.into());
        }
    });
    selection.open();
    let persistent = selection.clone();
    app.on_select_activate(move |token, generation| {
        persistent.activate(token, generation);
        persistent.open();
    });
    app.run()
}

[package]
name = "slint-kit-segmented-control-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 the controller’s ChoiceRow values, generation and active-token. Forward navigate and activate, and choose ChoiceFlow.left-to-right or .right-to-left for navigation.

Selected segments use primary intent and expose a radio role. Shared focus and controlled selection remain distinct; labels can wrap. With SelectBinding, reopen the persistent control after a committed choice.

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 { KitSegmentedControl, KitTheme, KitThemes } from "@kit/kit.slint";

export component Example inherits Window {
    title: "KitSegmentedControl example";
    preferred-width: 420px;
    preferred-height: 180px;
    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: "Segmented Control"; color: root.theme.text-primary; font-size: 20px * root.theme.text-scale; font-weight: 600; }
        KitSegmentedControl { theme: root.theme; rows: [{ token: 11, label: "Email", selected: true, disabled: false }, { token: 23, label: "Push", selected: false, disabled: false }, { token: 38, label: "SMS", selected: false, disabled: true }]; generation: 1; active-token: 11; activate(token, generation) => { root.status = "Choice token " + token; } }
        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

Types and variants

Callbacks

• invalid()
• navigate(NavigationStep)
• activate(int, int)

Functions

• check-validity() → bool
• report-validity() → bool
• set-custom-validity(message: string)
• reset-validation()
• take-focus()

See also

• Radio Group
• Toggle Group
• Rating