Cape

(yet another) Desktop UI library in Rust

*inspired by React, Moxie, and Crochet

---

• No RefCell
• No global state
• Reactive & declarative
• Caching helpers
• Retained DOM-like backing tree (reconciliation)
• No unsafe beyond rendering code

---

#[cape::ui]
fn counter(cx: &mut Cx) -> impl IntoNode {
    let count = cx.state(|| 0);

    Column::new()
        .spacing(5.)
        .child(format!("Count: {}", cx.at(count)))
        .child(
            Row::new()
                .spacing(5.)
                .child(
                    Button::new(cx)
                        .child("Increment")
                        .on_click(move |cx, _| *cx.at(count) += 1),
                )
                .child(
                    Button::new(cx)
                        .child("Decrement")
                        .on_click(move |cx, _| *cx.at(count) -= 1),
                ),
        )
}

---

What's missing

• Multiple windows
• Long list views (direct DOM mutation)
• Z-order (implies a simple layer compositor)
• Correct text input (IME)
• Accessibility (first priority would be Microsoft UIAutomation)

Not quite as sophisticated as Crochet, more based around empirical needs and wants.

Maintenance

There's no need for new UI libraries in Rust, as such I may not be very active or responsive. Think of this more as a tech demo, i.e. don't use it for any project you care about.