Creating your first window

Now we're ready to start using GTK+ from Rust. Let's create a new project for our music player:

cargo new rusic --bin

Add the dependency on the gio and gtk crates in your Cargo.toml file:

gio = "^0.3.0"
gtk = "^0.3.0"

Replace the content of the src/main.rs file with this:

extern crate gio;
extern crate gtk;

use std::env;

use gio::{ApplicationExt, ApplicationExtManual, ApplicationFlags};
use gtk::{
    Application,
    ApplicationWindow,
    WidgetExt,
    GtkWindowExt,
};

fn main() {
    let application = Application::new("com.github.rust-by-
     example", ApplicationFlags::empty())
        .expect("Application initialization failed");
    application.connect_startup(|application| {
        let window = ApplicationWindow::new(&application);
        window.set_title("Rusic");
        window...