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Accordion for Slint

KitAccordion · Slint Kit 0.3.0

Set of disclosure sections driven by stable identities.

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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.

Open Activity, then Settings. Rust keeps only the selected disclosure expanded.

ui/app.slint

export { KitFormValidation, HtmlInputKind, NumberInputFormat, KitInputConstraints, KitValidationResult, KitValidityState } from "@kit/kit.slint";
// SPDX-License-Identifier: GPL-3.0-or-later
import { KitAccordion, DisclosureRow, ExpansionMode, OptionRow, SelectState, NavigationStep, CloseReason, SelectionAvailability, KitTheme, KitThemes } from "@kit/kit.slint";
export component App inherits Window {
    title: "KitAccordion example";
    preferred-width: 520px;
    preferred-height: 400px;
    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);
    in property <[DisclosureRow]> disclosures;
    callback expand(int, int, bool, ExpansionMode);
    VerticalLayout {
        padding: 24px;
        spacing: 16px;
        alignment: start;
        control := KitAccordion {
            theme: root.theme; rows: root.disclosures; state: root.select-state; mode: ExpansionMode.single;
            navigate(step) => { root.select-navigate(step); }
            expansion-requested(token, generation, expanded, mode) => { root.expand(token, generation, expanded, mode); }
        }
        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();
    fn publish(app: &ui::App, expanded: Option<Destination>) {
        use slint::Model;
        let rows = app.get_rows().iter().map(|item| {
            let key = match item.token { 0 => Some(Destination::Overview), 1 => Some(Destination::Activity), 2 => Some(Destination::Settings), _ => None };
            ui::DisclosureRow { item: ui::OptionRow { description: "Details for this project section.".into(), ..item }, expanded: key.is_some() && key == expanded }
        }).collect::<Vec<_>>();
        app.set_disclosures(slint::ModelRc::new(slint::VecModel::from(rows)));
        app.set_selected_label(expanded.map_or("All sections collapsed", Destination::label).into());
    }
    publish(&app, None);
    let weak = app.as_weak();
    app.on_expand(move |token, generation, expanded, _mode| {
        if let Some(app) = weak.upgrade() {
            if generation != app.get_select_state().generation { return; }
            let key = match token { 0 => Some(Destination::Overview), 1 => Some(Destination::Activity), 2 => Some(Destination::Settings), _ => None };
            if key.is_some() { publish(&app, if expanded { key } else { None }); }
        }
    });
    app.run()
}

[package]
name = "slint-kit-accordion-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 DisclosureRow values and state, then handle expansion-requested(token, generation, expanded, mode). Choose ExpansionMode.single, the default, or .multiple.

The controller applies expansion policy and header navigation. Answers use row.item.description, and transitions respect reduced motion.

View source ↗

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

export component Example inherits Window {
    title: "KitAccordion 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-out property <string> status;
    VerticalLayout {
        padding: 24px; spacing: 16px; alignment: start;
        Text { text: "Accordion"; color: root.theme.text-primary; font-size: 20px * root.theme.text-scale; font-weight: 600; }
        KitAccordion { theme: root.theme; rows: [{ item: { token: 11, generation: 1, label: "Project permissions", description: "Members can read and edit all project notes.", disabled: false }, expanded: true }, { item: { token: 23, generation: 1, label: "Notification settings", description: "Choose how you receive updates.", disabled: false }, expanded: false }]; state: { open: false, generation: 1, active-index: 0, active: { present: true, token: 11 }, selected: { present: true, token: 11 }, selection-availability: SelectionAvailability.available }; }
        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 VerticalLayout.

Properties

Types and variants

Callbacks

• expansion-requested(int, int, bool, ExpansionMode)
• navigate(NavigationStep)

See also

• Collapse