Select

A button-like selection control backed by an anchored, keyboard-navigable popup.

Like every gpui-base primitive, Select 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 -- select

Import

use gpui_base::{Select};

Anatomy and API

The example composes Select. GPUI's standard styling and event traits provide presentation; these base types provide the interaction structure.

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

State and events

The delegate/state owns items and selection; activation opens the list and selection closes it.

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 super::*;

impl BaseShowcase {
    pub(in super::super) fn select(
        &self,
        combobox: bool,
        cx: &mut Context<Self>,
    ) -> impl IntoElement {
        let open = self.select_open;
        let selected = self.select_index.min(3);
        let labels = ["GPUI", "React", "SwiftUI", "Vue"];
        let entity = cx.entity().downgrade();
        let trigger_entity = entity.clone();
        let trigger = div()
            .id("select-trigger")
            .h_7()
            .px_2()
            .text_xs()
            .flex()
            .items_center()
            .justify_between()
            .border_1()
            .border_color(super::example_rgb(0x171717))
            .on_click(move |_, _, cx| {
                _ = trigger_entity.update(cx, |this, cx| {
                    this.select_open = !open;
                    cx.notify();
                });
            })
            .child(labels[selected])
            .child(if open { "⌃" } else { "⌄" });
        let options = div()
            .mt_1()
            .p_1()
            .border_1()
            .border_color(super::example_rgb(0x171717))
            .bg(super::example_rgb(0xffffff))
            .children(labels.into_iter().enumerate().map(|(ix, label)| {
                let entity = entity.clone();
                div()
                    .id(("select-option", ix))
                    .px_2()
                    .py_1()
                    .flex()
                    .justify_between()
                    .hover(|this| this.bg(super::example_rgb(0xf5f5f5)))
                    .child(label)
                    .when(ix == selected, |this| this.child("✓"))
                    .on_click(move |_, _, cx| {
                        _ = entity.update(cx, |this, cx| {
                            this.select_index = ix;
                            this.select_open = false;
                            cx.notify();
                        });
                    })
            }));
        if combobox {
            let root = Combobox::new("example-combobox")
                .open(open)
                .w_56()
                .child(trigger);
            Popup::new("example-combobox-options", root)
                .when(open, |this| this.content(options))
                .into_any_element()
        } else {
            let root = Select::new("example-select")
                .open(open)
                .on_open_change({
                    let entity = entity.clone();
                    move |next, _, cx| {
                        _ = entity.update(cx, |this, cx| {
                            this.select_open = next;
                            cx.notify();
                        });
                    }
                })
                .accessibility_label("Framework")
                .w_56()
                .child(trigger);
            Popup::new("example-select-options", root)
                .when(open, |this| this.content(options))
                .into_any_element()
        }
    }
}

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

Accessibility

Label the trigger, expose expanded/selected state, and support traversal, selection, Escape, and focus return.

Notes

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