Resolve warnings in screenplay

Cargo.lock

@@ -3540,6 +3540,7 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 name = "screenplay"
 version = "0.1.0"
 dependencies = [
+ "async-std",
  "glib",
  "gtk4",
 ]

screenplay/Cargo.toml

@@ -7,5 +7,6 @@ license = "GPL-3.0-only"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+async-std = "1.13.0"
 glib        = { version = "0.18" }
 gtk = { version = "0.7", package = "gtk4" }

screenplay/src/lib.rs

@@ -67,7 +67,7 @@ impl Screenplay {
     pub fn new(gtk_app: &gtk::Application, screens: Vec<Screen>) -> Result<Self, Error> {
         let window = gtk::ApplicationWindow::new(gtk_app);
 
-        let (sender, receiver) = gtk::glib::MainContext::channel(gtk::glib::Priority::DEFAULT);
+        let (sender, receiver) = async_std::channel::unbounded();
 
         let layout = gtk::Box::builder()
             .orientation(gtk::Orientation::Horizontal)
@@ -89,11 +89,15 @@ impl Screenplay {
         layout.append(&frame);
 
         listbox.connect_row_activated(move |_, row| {
-            match row.index() {
+            let sender = sender.clone();
-                -1 => sender.send(Action::Deselect),
+            let row = row.clone();
-                idx => sender.send(Action::SelectPage(idx as usize)),
+            glib::spawn_future_local(async move {
-            }
+                match row.index() {
-            .unwrap()
+                    -1 => sender.send(Action::Deselect).await,
+                    idx => sender.send(Action::SelectPage(idx as usize)).await,
+                }
+                .unwrap()
+            });
         });
 
         screens.iter().for_each(|Screen { title, .. }| {
@@ -107,8 +111,14 @@ impl Screenplay {
         let storybook = Self { frame, screens };
 
         {
-            let mut storybook = storybook.clone();
+            glib::spawn_future_local({
-            receiver.attach(None, move |message| storybook.process_action(message));
+                let mut storybook = storybook.clone();
+                async move {
+                    while let Ok(msg) = receiver.recv().await {
+                        storybook.process_action(msg);
+                    }
+                }
+            });
         }
 
         Ok(storybook)