Resizable

Panel groups and resize handles for user-adjustable split layouts.

Like every gpui-base primitive, Resizable 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 -- resizable

Import

use gpui_base::{ResizablePanel, ResizablePanelGroup, ResizableState, h_resizable, resizable_panel};

Anatomy and API

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

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

State and events

Panel sizes live in resizable state; dragging handles updates adjacent panels subject to minimums.

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::{IntoElement, ParentElement as _, Styled as _, div, px};
use gpui_base::{h_resizable, resizable_panel};

use super::super::BaseShowcase;

impl BaseShowcase {
    pub(in super::super) fn resizable(&self) -> impl IntoElement {
        div()
            .w_72()
            .h_40()
            .text_xs()
            .border_1()
            .border_color(super::example_rgb(0x171717))
            .child(
                h_resizable("example-resizable")
                    .child(
                        resizable_panel()
                            .size(px(124.))
                            .size_range(px(116.)..px(210.))
                            .child(
                                div()
                                    .size_full()
                                    .flex()
                                    .items_center()
                                    .justify_center()
                                    .border_r_1()
                                    .border_color(super::example_rgb(0x171717))
                                    .p_2()
                                    .items_start()
                                    .justify_start()
                                    .flex_col()
                                    .gap_1()
                                    .child(
                                        div()
                                            .text_xs()
                                            .text_color(super::example_rgb(0x737373))
                                            .child("PROJECT"),
                                    )
                                    .children(["Overview", "Components", "Settings"].map(
                                        |label| {
                                            div()
                                                .w_full()
                                                .h(px(26.))
                                                .px_2()
                                                .flex()
                                                .items_center()
                                                .whitespace_nowrap()
                                                .child(label)
                                        },
                                    )),
                            ),
                    )
                    .child(
                        resizable_panel().child(
                            div()
                                .size_full()
                                .flex()
                                .items_center()
                                .justify_center()
                                .bg(super::example_rgb(0xffffff))
                                .p_2()
                                .items_start()
                                .justify_start()
                                .flex_col()
                                .gap_2()
                                .child(div().child("Workspace"))
                                .child(
                                    div()
                                        .text_color(super::example_rgb(0x737373))
                                        .child("Drag the divider to resize navigation."),
                                ),
                        ),
                    ),
            )
    }
}

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

Accessibility

Provide keyboard alternatives for handles and preserve usable minimum panel sizes.

Notes

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