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fix: use std::sync::mpsc + timeout_add_local for thread→UI messaging

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Mitchell R 2026-05-10 20:10:23 +02:00
parent df231344a8
commit 76af07de61
1 changed files with 9 additions and 10 deletions
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13
kiosk/src/ui.rs
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@ -1,5 +1,6 @@
use std::cell::RefCell; use std::cell::RefCell;
use std::rc::Rc; use std::rc::Rc;
use std::sync::mpsc;
use gtk4::prelude::*; use gtk4::prelude::*;
use gtk4::{self as gtk, Application, ApplicationWindow, Box as GtkBox, Grid, Label, Orientation, Picture}; use gtk4::{self as gtk, Application, ApplicationWindow, Box as GtkBox, Grid, Label, Orientation, Picture};
@ -32,14 +33,11 @@ fn activate(app: &Application) {
gtk::STYLE_PROVIDER_PRIORITY_APPLICATION, gtk::STYLE_PROVIDER_PRIORITY_APPLICATION,
); );
// Start with logo
show_logo(&window); show_logo(&window);
window.present(); window.present();
// Channel to send results from worker thread to UI let (tx, rx) = mpsc::channel::<WorkerMsg>();
let (tx, rx) = gtk::glib::MainContext::channel::<WorkerMsg>(gtk::glib::Priority::DEFAULT);
// Worker thread — blocking HTTP calls
let server_url = std::env::args().nth(1); let server_url = std::env::args().nth(1);
std::thread::spawn(move || { std::thread::spawn(move || {
let server = server::discover_server(server_url.as_deref()); let server = server::discover_server(server_url.as_deref());
@ -62,20 +60,21 @@ fn activate(app: &Application) {
info!("bundle: {} cameras, {} layouts", bundle.cameras.len(), bundle.layouts.len()); info!("bundle: {} cameras, {} layouts", bundle.cameras.len(), bundle.layouts.len());
let _ = tx.send(WorkerMsg::RenderBundle(bundle)); let _ = tx.send(WorkerMsg::RenderBundle(bundle));
// Heartbeat loop
loop { loop {
std::thread::sleep(std::time::Duration::from_secs(60)); std::thread::sleep(std::time::Duration::from_secs(60));
server::heartbeat(&server, &key); server::heartbeat(&server, &key);
} }
}); });
// Receive messages on UI thread // Poll channel from UI thread via timeout
let window_clone = window.clone(); let window_clone = window.clone();
rx.attach(None, move |msg| { gtk::glib::timeout_add_local(std::time::Duration::from_millis(100), move || {
while let Ok(msg) = rx.try_recv() {
match msg { match msg {
WorkerMsg::ShowPairingCode(code) => show_pairing_code(&window_clone, &code), WorkerMsg::ShowPairingCode(code) => show_pairing_code(&window_clone, &code),
WorkerMsg::RenderBundle(bundle) => render_bundle(&window_clone, bundle), WorkerMsg::RenderBundle(bundle) => render_bundle(&window_clone, bundle),
} }
}
gtk::glib::ControlFlow::Continue gtk::glib::ControlFlow::Continue
}); });
} }