Alert for Slint

KitAlert · Slint Kit 0.3.0

Contextual message for a result, information or error.

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.

Dismiss the saved alert, then show it again. Rust removes and restores its view.

ui/app.slint

export { KitFormValidation, HtmlInputKind, NumberInputFormat, KitInputConstraints, KitValidationResult, KitValidityState } from "@kit/kit.slint";
// SPDX-License-Identifier: GPL-3.0-or-later
import { KitAlert, KitButton, AlertSeverity, KitTheme, KitThemes } from "@kit/kit.slint";
export component App inherits Window {
    title: "KitAlert example";
    preferred-width: 520px;
    preferred-height: 280px;
    max-width: 100000px;
    max-height: 100000px;
    background: root.theme.canvas;
    in-out property <KitTheme> theme: KitThemes.light;
    in property <bool> showing: true;
    callback dismiss();
    callback show();
    VerticalLayout {
        padding: 24px;
        spacing: 16px;
        alignment: start;
        if root.showing: control := KitAlert { theme: root.theme; severity: AlertSeverity.success; title: "Changes saved"; message: "Your team can read the updated project."; dismissible: true; dismissed => { root.dismiss(); } }
        KitButton { theme: root.theme; text: "Show alert"; activated => { root.show(); } }
        result := Text { text: root.showing ? "Alert visible" : "Alert dismissed"; 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_dismiss(move || { if let Some(app) = weak.upgrade() { app.set_showing(false); } });
    let weak = app.as_weak();
    app.on_show(move || { if let Some(app) = weak.upgrade() { app.set_showing(true); } });
    app.run()
}

Cargo.toml and build.rs

Cargo.toml

[package]
name = "slint-kit-alert-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]

build.rs

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

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

Set severity: AlertSeverity.information, .success, .warning or .error, with an explicit heading. Enable dismissible and handle dismissed to remove the message in owning state.

The component does not close itself. Its accessibility role requests a polite announcement, or assertive for errors, subject to actual backend support.

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

export component Example inherits Window {
    title: "KitAlert example";
    preferred-width: 480px;
    preferred-height: 220px;
    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: "Alert"; color: root.theme.text-primary; font-size: 20px * root.theme.text-scale; font-weight: 600; }
        KitAlert { theme: root.theme; severity: AlertSeverity.success; title: "Changes saved"; message: "Your team can now see the updated project."; dismissible: true; dismissed => { root.status = "Dismiss requested"; } }
        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

Name	Type	Direction
`theme`	`KitTheme`	`in`
`severity`	`AlertSeverity`	`in`
`title`	`string`	`in`
`message`	`string`	`in`
`dismissible`	`bool`	`in`

Types and variants

Type	Declaration
`enum AlertSeverity`	`information, success, warning, error`

Callbacks

dismissed()