feat!(ccs): Replace run function with AppRunner trait

crates/component-system/examples/basic/main.rs

@@ -6,10 +6,12 @@ extern crate cosmic_component_system as ccs;
 mod components;
 
 use self::components::App;
-use ccs::Component;
+use ccs::{AppRunner, Component};
 
 fn main() {
-    ccs::run(|app| {
+    gtk4::builders::ApplicationBuilder::new()
+        .application_id("org.pop.CosmicComponentExample")
+        .cosmic_run(|app| {
             App::default().register(app);
         });
 }

crates/component-system/src/app_runner.rs

@@ -0,0 +1,22 @@
+// Copyright 2022 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use gtk4::prelude::{ApplicationExt, ApplicationExtManual};
+
+pub trait AppRunner {
+    /// Convenience method to activates and run a GTK4 application.
+    fn cosmic_run<F: Fn(gtk4::Application) + 'static>(self, func: F);
+}
+
+impl AppRunner for gtk4::Application {
+    fn cosmic_run<F: Fn(gtk4::Application) + 'static>(self, func: F) {
+        self.connect_activate(move |app| func(app.clone()));
+        self.run();
+    }
+}
+
+impl AppRunner for gtk4::builders::ApplicationBuilder {
+    fn cosmic_run<F: Fn(gtk4::Application) + 'static>(self, func: F) {
+        self.build().cosmic_run(func);
+    }
+}

crates/component-system/src/lib.rs

@@ -1,11 +1,13 @@
 // Copyright 2022 System76 <info@system76.com>
 // SPDX-License-Identifier: MPL-2.0
 
+mod app_runner;
 mod macros;
 
 use gtk4::prelude::*;
 use tokio::sync::mpsc;
 
+pub use self::app_runner::AppRunner;
 pub use gtk4 as gtk;
 pub use relm4_macros::view;
 
@@ -198,16 +200,6 @@ pub fn forward<I: 'static, O: 'static, F: (Fn(I) -> O) + 'static>(
     })
 }
 
-/// Convenience function for launching an application.
-pub fn run<F: Fn(gtk4::Application) + 'static>(func: F) {
-    use gtk4::prelude::*;
-    let app = gtk4::Application::new(None, Default::default());
-
-    app.connect_activate(move |app| func(app.clone()));
-
-    app.run();
-}
-
 /// Convenience function for spawning tasks on the local executor
 pub fn spawn_local<F: std::future::Future<Output = ()> + 'static>(func: F) {
     gtk4::glib::MainContext::default().spawn_local(func);