changed inputs for second section and implemented Clone and Copy traits for Alignment data structure

src/main.rs

@@ -1,24 +1,19 @@
-extern crate core;
-
 use gtk4 as gtk;
 
-use gtk::*;
 use gtk::prelude::*;
 
-mod view;
-mod model;
 mod controller;
+mod model;
+mod view;
 
 use controller::*;
 use view::view::*;
 
 fn main() {
-
     let app = adw::Application::builder()
         .application_id("com.github.gtk-rs.examples.basic")
         .build();
 
     app.connect_activate(ui);
     app.run();
-
-}
+}