demo.rs

use gtk::{prelude::*, Application, ApplicationWindow};
use gtk_egui_area::EguiArea;
use std::cell::RefCell;

fn main() {
    let app = Application::builder().build();

    app.connect_activate(build_ui);

    app.run();
}

fn build_ui(app: &Application) {
    let window = ApplicationWindow::new(app);
    window.set_default_width(1200);
    window.set_default_height(900);

    let demo_windows = RefCell::new(egui_demo_lib::DemoWindows::default());
    let egui_area = EguiArea::new(move |ctx| {
        demo_windows.borrow_mut().ui(ctx);
    });

    let frame = gtk::Frame::new(Some("EGUI"));
    frame.set_label_align(0.5);
    frame.set_margin_top(10);
    frame.set_margin_bottom(10);
    frame.set_margin_start(10);
    frame.set_margin_end(10);
    frame.set_child(Some(&egui_area));

    window.set_child(Some(&frame));

    window.present();
}