Slider

A slider selects a numeric value within a range. Slider stores the value; SliderStyle controls the track, fill, thumb, and optional value display. BeverlyPlugin installs the slider systems.

Validation Errors

Use .bind(...) with .error(...) to render rejected numeric edits below the slider:

#![allow(unused)]
fn main() {
Slider::new(0.0, 100.0)
    .bind(User::rating)
    .error(|errors| text(errors.join("\n")))
}

Slider::error(...) also supports manual BindingErrorState without binding. See Error Callbacks for lifecycle and setup.

Live Demo

Open the demo in a separate tab.

Basic Usage

#![allow(unused)]
fn main() {
use beverly::components::slider::{Slider, SliderStyle, spawn_slider};
use beverly::prelude::ThemeResource;
use bevy::prelude::*;

fn add_slider(parent: &mut ChildSpawnerCommands, theme: &ThemeResource) {
    spawn_slider(
        parent,
        Slider::new(0.0, 100.0).value(42.0).step(1.0).label("Volume"),
        SliderStyle::default(),
        theme,
    );
}
}

Use .disabled(true) to prevent interaction. Provide .label(...) as the accessible name, and keep a visible label beside the control.

Reading Changes

Read SliderChanged with MessageReader<SliderChanged> in an update system. Each message contains the slider entity, its numeric value, and whether it is currently dragging. The example uses the entity to update only the matching readout; application state remains owned by the application.