Method for overlord to tell ui to shut down

src/globals.rs

@@ -47,6 +47,10 @@ pub struct Globals {
     /// Whether or not we have a saved private key and need the password to unlock it
     pub need_password: AtomicBool,
 
+    /// Whether or not we are shutting down. For the UI (minions will be signaled and
+    /// waited for by the overlord)
+    pub shutting_down: AtomicBool,
+
     /// Settings
     pub settings: Mutex<Settings>,
 }
@@ -71,6 +75,7 @@ lazy_static! {
             desired_events: Mutex::new(HashMap::new()),
             people: Mutex::new(HashMap::new()),
             need_password: AtomicBool::new(false),
+            shutting_down: AtomicBool::new(false),
             settings: Mutex::new(Settings::default()),
         }
     };

src/main.rs

@@ -70,10 +70,10 @@ async fn tokio_main() {
 // Any task can call this to shutdown
 pub fn initiate_shutdown() -> Result<(), Error> {
     let to_overlord = GLOBALS.to_overlord.clone();
-    to_overlord.send(BusMessage {
+    let _ = to_overlord.send(BusMessage {
         target: "all".to_string(),
         kind: "shutdown".to_string(),
         json_payload: serde_json::to_string("").unwrap(),
-    })?;
+    }); // ignore errors
     Ok(())
 }

src/overlord/mod.rs

@@ -43,6 +43,10 @@ impl Overlord {
             error!("{}", e);
         }
 
+        GLOBALS
+            .shutting_down
+            .store(true, std::sync::atomic::Ordering::Relaxed);
+
         // Send shutdown message to all minions (and ui)
         // If this fails, it's probably because there are no more listeners
         // so just ignore it and keep shutting down.

src/ui/mod.rs

@@ -118,6 +118,13 @@ impl GossipUi {
 
 impl eframe::App for GossipUi {
     fn update(&mut self, ctx: &Context, frame: &mut eframe::Frame) {
+        if GLOBALS
+            .shutting_down
+            .load(std::sync::atomic::Ordering::Relaxed)
+        {
+            frame.close();
+        }
+
         let darkmode: bool = ctx.style().visuals.dark_mode;
 
         egui::TopBottomPanel::top("menu").show(ctx, |ui| {