GPUI Components Skill

Generates production-ready Rust code for GPUI desktop UI components following patterns from Zed editor and gpui-component library.

When to Use This Skill

• Building desktop UI applications with GPUI framework
• Creating custom components using RenderOnce or Render traits
• Implementing themed components with ActiveTheme
• Building autocomplete/completion menus
• Creating command palettes and popup menus
• Working with gpui-component crate

Core GPUI Concepts

Application Setup

use gpui::{Application, Window, Context, div, px, rgb};
use gpui_component::{init, Root, Theme};

fn main() {
    Application::new().run(|cx| {
        // Initialize gpui-component
        gpui_component::init(cx);
        
        cx.open_window(
            WindowOptions::default(),
            |window, cx| Root::new(MyApp::new(cx), window, cx)
        );
    });
}

Component Patterns

RenderOnce (Stateless)

use gpui::{IntoElement, RenderOnce, Styled, div};

#[derive(IntoElement)]
pub struct MyButton {
    label: SharedString,
    variant: ButtonVariant,
}

impl RenderOnce for MyButton {
    fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
        div()
            .px_3()
            .py_2()
            .bg(cx.theme().primary)
            .text_color(cx.theme().primary_foreground)
            .rounded_md()
            .child(self.label)
    }
}

Render with Entity (Stateful)

use gpui::{Entity, Render, Context};

pub struct Counter {
    count: i32,
}

impl Render for Counter {
    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        div()
            .flex()
            .gap_2()
            .child(Button::new("dec").on_click(cx.listener(|this, _, _, cx| {
                this.count -= 1;
                cx.notify();
            })))
            .child(format!("Count: {}", self.count))
            .child(Button::new("inc").on_click(cx.listener(|this, _, _, cx| {
                this.count += 1;
                cx.notify();
            })))
    }
}

Available Components (gpui-component)

Form Components

• Button – Buttons with variants (primary, danger, ghost, link)
• Input – Text input with LSP completion support
• NumberInput – Numeric input with step controls
• Checkbox – Checkbox with label
• Switch – Toggle switch
• Radio – Radio button groups
• Select – Dropdown select
• Slider – Range slider

Layout Components

• Dialog – Modal dialogs
• Popover – Popup popovers
• Menu / PopupMenu – Menus and context menus
• Tab – Tab navigation
• Accordion – Collapsible sections
• Sidebar – Sidebar navigation
• Dock – Dockable panels

Display Components

• Badge – Status badges
• Avatar – User avatars
• Icon – Icon display (IconName enum)
• Label – Text labels
• Tooltip – Tooltips
• Notification – Toast notifications

Data Components

• Table – Data tables
• List / VirtualList – Scrollable lists
• Tree – Tree view
• Chart – Charts and plots

Theming

Accessing Theme

use gpui_component::ActiveTheme;

fn render(&mut self, window: &mut Window, cx: &mut App) -> impl IntoElement {
    div()
        .bg(cx.theme().background)
        .text_color(cx.theme().foreground)
        .border_1()
        .border_color(cx.theme().border)
}

Theme Colors

// Background colors
cx.theme().background      // Primary background
cx.theme().secondary       // Secondary background  
cx.theme().muted          // Muted background
cx.theme().card           // Card background

// Foreground colors
cx.theme().foreground     // Primary text
cx.theme().muted_foreground // Muted text

// Semantic colors
cx.theme().primary        // Primary accent
cx.theme().destructive    // Danger/error
cx.theme().success        // Success
cx.theme().warning        // Warning

// Border colors
cx.theme().border         // Default border
cx.theme().ring           // Focus ring

Component Examples

Button Usage

use gpui_component::button::{Button, ButtonVariants};

Button::new("save")
    .label("Save")
    .icon(IconName::Save)
    .primary()
    .on_click(cx.listener(|this, _, window, cx| {
        this.save(window, cx);
    }))

Input with State

use gpui_component::input::{Input, InputState};

// Create state
let input_state = cx.new(|cx| InputState::new(cx));

// In render:
Input::new(&self.input_state)
    .placeholder("Enter text...")
    .cleanable(true)

PopupMenu / Command Palette

use gpui_component::menu::{PopupMenu, PopupMenuItem};

let menu = cx.new(|cx| {
    PopupMenu::build(cx, |menu, window, cx| {
        menu.menu_item(PopupMenuItem::new("New File")
            .icon(IconName::FilePlus)
            .action(Box::new(NewFile)))
        .separator()
        .menu_item(PopupMenuItem::new("Save")
            .icon(IconName::Save)
            .action(Box::new(Save)))
    })
});

Completion Provider

use gpui_component::input::{CompletionProvider, InputState};

struct MyCompletionProvider;

impl CompletionProvider for MyCompletionProvider {
    fn completions(
        &self,
        text: &Rope,
        offset: usize,
        trigger: CompletionContext,
        window: &mut Window,
        cx: &mut Context<InputState>,
    ) -> Task<Result<CompletionResponse>> {
        let items = vec![
            CompletionItem {
                label: "option1".into(),
                ..Default::default()
            },
        ];
        Task::ready(Ok(CompletionResponse::Array(items)))
    }
    
    fn is_completion_trigger(
        &self,
        offset: usize,
        new_text: &str,
        cx: &mut Context<InputState>,
    ) -> bool {
        new_text == "/" || new_text == "@"
    }
}

Reference Files

For detailed patterns, read:

• reference/components.md – Full component API
• reference/theming.md – Theme system details
• reference/input-lsp.md – Input with completions
• reference/menus.md – Menu and command palette

Project Setup

Cargo.toml

[dependencies]
gpui = "0.2"
gpui-component = { version = "0.4", features = ["webview"] }

Basic App Structure

use gpui::*;
use gpui_component::*;

struct App {
    // state
}

impl Render for App {
    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        Root::new(
            div()
                .size_full()
                .flex()
                .flex_col()
                .bg(cx.theme().background)
                .child(self.render_toolbar(window, cx))
                .child(self.render_content(window, cx)),
            window,
            cx
        )
    }
}

fn main() {
    Application::new().run(|cx| {
        gpui_component::init(cx);
        cx.open_window(WindowOptions::default(), |window, cx| {
            cx.new(|cx| App::new(cx))
        });
    });
}