monorepo/kifu/kifu-gtk/src/main.rs

use gtk::prelude::*;
use kifu_core::{CoreApp, Request, Response};
use kifu_gtk::{ui::PlayingField, CoreApi};
use std::sync::{Arc, RwLock};

fn main() {
    gio::resources_register_include!("com.luminescent-dreams.kifu-gtk.gresource")
        .expect("Failed to register resources");

    let runtime = Arc::new(
        tokio::runtime::Builder::new_multi_thread()
            .enable_all()
            .build()
            .unwrap(),
    );

    let core = CoreApp::new();

    let core_handle = runtime.spawn({
        let core = core.clone();
        async move {
            core.run().await;
        }
    });

    let app = gtk::Application::builder()
        .application_id("com.luminescent-dreams.kifu-gtk")
        .build();

    app.connect_activate({
        let runtime = runtime.clone();
        move |app| {
            let (gtk_tx, gtk_rx) =
                gtk::glib::MainContext::channel::<Response>(gtk::glib::PRIORITY_DEFAULT);

            let api = CoreApi {
                gtk_tx,
                rt: runtime.clone(),
                core: core.clone(),
            };

            let window = gtk::ApplicationWindow::new(app);
            window.present();

            gtk_rx.attach(None, {
                let api = api.clone();
                let playing_field = Arc::new(RwLock::new(None));
                move |message| {
                    match message {
                        Response::PlayingFieldView(view) => {
                            let api = api.clone();

                            let start = std::time::Instant::now();
                            let mut playing_field = playing_field.write().unwrap();
                            if playing_field.is_none() {
                                let field = PlayingField::new(api, view);
                                window.set_child(Some(&field));
                                *playing_field = Some(field);
                            } else {
                                playing_field.as_ref().map(|field| field.update_view(view));
                            }
                            let end = std::time::Instant::now();
                            println!("Time to render the playing field: {:?}", end - start);
                        }
                    }
                    Continue(true)
                }
            });

            api.dispatch(Request::PlayingField);
        }
    });

    println!("running the gtk loop");
    app.run();

    let _ = runtime.block_on(async { core_handle.await });
}