KitCollapse

Disclosure block for arbitrary content retained in the visual tree.

Supply title and expanded, then acknowledge expansion-requested(bool) in your state. Place the disclosure content in its children.

The body stays mounted during the height animation and is hidden when collapsed. theme.reduced-motion removes transition duration.

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Complete example

This complete Slint file is a visual composition used to produce the screenshot above. Internal strings without a label property retain the kit’s default language; system dialogs follow the host platform. Projected state and callbacks requesting a decision need host wiring; the standalone fixture does not supply that controller. Set up the Rust project, then see the typed controller application for working editing, validation and selection.

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

export component Example inherits Window {
    title: "KitCollapse example";
    preferred-width: 480px;
    preferred-height: 250px;
    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: "Collapse"; color: root.theme.text-primary; font-size: 20px * root.theme.text-scale; font-weight: 600; }
        KitCollapse { theme: root.theme; title: "What happens after I publish?"; expanded: true; Text { text: "Your team receives a notification and can review the latest version."; color: root.theme.text-primary; font-size: 14px * root.theme.text-scale; wrap: word-wrap; } }
        if root.status != "": Text { text: root.status; color: root.theme.text-secondary; font-size: 12px * root.theme.text-scale; wrap: word-wrap; }
    }
}

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Public API

Inherits VerticalLayout. The declarations below come from the component source. Parent properties remain available; see the controller guide for state management.

Properties

Name	Type	Direction
`theme`	`KitTheme`	`in`
`control-size`	`ControlSize`	`in`
`title`	`string`	`in`
`expanded`	`bool`	`in`
`disabled`	`bool`	`in`

Types and variants

Names below use Slint syntax. Shared Rust domain types live in slint_kit; presentation enums come from the Rust types generated by Slint.

Type	Declaration
`enum ControlSize`	`compact, medium, comfortable`

Callbacks

expansion-requested(bool)

Functions

take-focus()