examples: Add a menubar one

examples/Cargo.toml

@@ -151,6 +151,10 @@ required-features = ["im-rc"]
 name = "list_view_apps_launcher"
 path = "list_view_apps_launcher/main.rs"
 
+[[bin]]
+name = "menubar"
+path = "menubar/main.rs"
+
 [[bin]]
 name = "rotation_bin"
 path = "rotation_bin/main.rs"

examples/menubar/README.md

@@ -0,0 +1,6 @@
+# Menubar
+
+This example demonstrates how to create a menubar in the top-level `ApplicationWindow`, add
+menu items to it, and connect signals to those items.
+
+![Screenshot](screenshot.png)

examples/menubar/main.rs

@@ -0,0 +1,54 @@
+use gtk::{gio, prelude::*};
+
+fn main() {
+    // Create a new application
+    let application = gtk::Application::builder()
+        .application_id("com.github.gtk-rs.examples.menubar")
+        .build();
+    application.connect_startup(on_startup);
+    application.connect_activate(on_activate);
+    application.run();
+}
+
+fn on_startup(app: &gtk::Application) {
+    let about = gio::ActionEntry::builder("about")
+        .activate(|_, _, _| println!("About was pressed"))
+        .build();
+
+    let quit = gio::ActionEntry::builder("quit")
+        .activate(|app: &gtk::Application, _, _| app.quit())
+        .build();
+
+    app.add_action_entries([about, quit]);
+
+    let menubar = {
+        let file_menu = {
+            let about_menu_item = gio::MenuItem::new(Some("About"), Some("app.about"));
+            let quit_menu_item = gio::MenuItem::new(Some("Quit"), Some("app.quit"));
+
+            let file_menu = gio::Menu::new();
+            file_menu.append_item(&about_menu_item);
+            file_menu.append_item(&quit_menu_item);
+            file_menu
+        };
+
+        let menubar = gio::Menu::new();
+        menubar.append_submenu(Some("File"), &file_menu);
+
+        menubar
+    };
+
+    app.set_menubar(Some(&menubar));
+}
+
+fn on_activate(application: &gtk::Application) {
+    let window = gtk::ApplicationWindow::builder()
+        .application(application)
+        .title("Menubar Example")
+        .default_width(350)
+        .default_height(350)
+        .show_menubar(true)
+        .build();
+
+    window.present();
+}