Book Image

Rust Programming By Example

By : Guillaume Gomez, Antoni Boucher
Book Image

Rust Programming By Example

By: Guillaume Gomez, Antoni Boucher

Overview of this book

Rust is an open source, safe, concurrent, practical language created by Mozilla. It runs blazingly fast, prevents segfaults, and guarantees safety. This book gets you started with essential software development by guiding you through the different aspects of Rust programming. With this approach, you can bridge the gap between learning and implementing immediately. Beginning with an introduction to Rust, you’ll learn the basic aspects such as its syntax, data types, functions, generics, control flows, and more. After this, you’ll jump straight into building your first project, a Tetris game. Next you’ll build a graphical music player and work with fast, reliable networking software using Tokio, the scalable and productive asynchronous IO Rust library. Over the course of this book, you’ll explore various features of Rust Programming including its SDL features, event loop, File I/O, and the famous GTK+ widget toolkit. Through these projects, you’ll see how well Rust performs in terms of concurrency—including parallelism, reliability, improved performance, generics, macros, and thread safety. We’ll also cover some asynchronous and reactive programming aspects of Rust. By the end of the book, you’ll be comfortable building various real-world applications in Rust.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Events and Basic Game Mechanisms

Showing the song's current time

Currently, we only display the progression of the song. The user has no way to know the duration and for how many seconds the song has been playing. Let's fix that by adding labels that will show the current time and the duration.

We'll need two new import statements in the main module:

use gtk::{Label, LabelExt};

We'll also add two label in our App structure:

struct App {
    adjustment: Adjustment,
    cover: Image,
    current_time_label: Label,
    duration_label: Label,
    playlist: Rc<Playlist>,
    state: Arc<Mutex<State>>,
    toolbar: MusicToolbar,
    window: Window,

One label for the current time and the other for the duration. Since we want to show the different label on the right of the cursor, we'll create a horizontal box, this code should be added in App::new():

let hbox = gtk::Box::new(Horizontal, 10);

let adjustment = Adjustment::new(0.0, 0.0, 10.0, 0.0, 0.0, 0.0);
let scale = Scale::new(Horizontal, &amp...