Number Input

A numeric input with reusable increment, decrement, and step behavior.

Like every gpui-base primitive, Number Input supplies behavior and semantic structure without imposing a product visual language. Apply GPUI styles and compose the exported parts to match your design system.

Example

The single native Cargo entrypoint selects this primitive from the shared showcase implementation. The same showcase is compiled once for the WASM preview above.

cargo run -p gpui-base --example components -- number-input

Import

use gpui_base::{Decrement, Increment, NumberInput, NumberInputText};

Anatomy and API

The example composes Decrement, Increment, NumberInput, NumberInputText. GPUI's standard styling and event traits provide presentation; these base types provide the interaction structure.

The authoritative module is components/number_input.rs. Native and browser previews compile this same file.

State and events

The backing input state owns numeric text/value; step actions apply the configured limits.

Keep controlled state on the parent render type or in a GPUI entity. Update it in callbacks and call cx.notify(); do not recreate persistent entities during every render.

Complete Rust example

The complete implementation used by the runnable showcase is embedded directly from Rust source:

use gpui::{
    AnyElement, Context, InteractiveElement, IntoElement, ParentElement as _, Styled as _, div, px,
    relative,
};
use gpui_base::{Button, NumberInput};

use super::super::BaseShowcase;

impl BaseShowcase {
    pub(in super::super) fn number_input(&self, cx: &mut Context<Self>) -> impl IntoElement {
        let valid = self.input.read(cx).value().parse::<f64>().is_ok();

        fn render_btn(this: Button, icon: AnyElement) -> Button {
            this.w(px(24.))
                .flex_1()
                .min_h_0()
                .line_height(relative(1.))
                .flex()
                .items_center()
                .justify_center()
                .bg(gpui::black())
                .text_color(gpui::white())
                .hover(|this| this.bg(gpui::black().opacity(0.8)))
                .child(icon)
        }

        fn minus_icon() -> AnyElement {
            div()
                .w(px(8.))
                .h(px(1.))
                .bg(gpui::white())
                .into_any_element()
        }

        fn plus_icon() -> AnyElement {
            div()
                .relative()
                .size(px(8.))
                .child(
                    div()
                        .absolute()
                        .top(px(3.5))
                        .left_0()
                        .w_full()
                        .h(px(1.))
                        .bg(gpui::white()),
                )
                .child(
                    div()
                        .absolute()
                        .left(px(3.5))
                        .top_0()
                        .h_full()
                        .w(px(1.))
                        .bg(gpui::white()),
                )
                .into_any_element()
        }

        div()
            .w(px(200.))
            .flex()
            .flex_col()
            .gap_1()
            .text_xs()
            .child(div().text_xs().child("Quantity"))
            .child(
                NumberInput::new(&self.input)
                    .controls_right()
                    .w_full()
                    .h_7()
                    .flex()
                    .items_center()
                    .border_1()
                    .border_color(if valid {
                        super::example_rgb(0x171717)
                    } else {
                        super::example_rgb(0x737373)
                    })
                    .input(div().w_full().px_2().child(self.input.clone()))
                    .decrement_button(|button| render_btn(button, minus_icon()))
                    .increment_button(|button| render_btn(button, plus_icon())),
            )
            .child(
                div()
                    .text_xs()
                    .text_color(super::example_rgb(0x737373))
                    .child(if valid { "Step: 1" } else { "Enter a number" }),
            )
    }
}

The command above supplies application initialization, window creation, and shared BaseShowcase state.

Accessibility

Expose label, value, bounds, and keyboard-accessible step actions.

Notes

Use stable element IDs where accepted. Verify focus, hover, active, selected, disabled, reduced-motion, and high-contrast appearances in the consuming design system.