Book Image

Mastering Qt 5 - Second Edition

By : Guillaume Lazar, Robin Penea
Book Image

Mastering Qt 5 - Second Edition

By: Guillaume Lazar, Robin Penea

Overview of this book

Qt 5.11 is an app development framework that provides a great user experience and develops full capability applications with Qt Widgets, QML, and even Qt 3D. Whether you're building GUI prototypes or fully-fledged cross-platform GUI applications with a native look and feel, Mastering Qt 5 is your fastest, easiest, and most powerful solution. This book addresses various challenges and teaches you to successfully develop cross-platform applications using the Qt framework, with the help of well-organized projects. Working through this book, you will gain a better understanding of the Qt framework, as well as the tools required to resolve serious issues, such as linking, debugging, and multithreading. You'll start off your journey by discovering the new Qt 5.11 features, soon followed by exploring different platforms and learning to tame them. In addition to this, you'll interact with a gamepad using Qt Gamepad. Each chapter is a logical step for you to complete in order to master Qt. By the end of this book, you'll have created an application that has been tested and is ready to be shipped.
Table of Contents (16 chapters)

Building a snake engine in JavaScript

It is time to get your hands dirty. Let's see how to create an engine in JavaScript to manage a snake game using our board, our factory, and the power of QML.

Please create a new engine.js file with the following snippet:

.import "factory.js" as Factory 
.import "board.js" as Board 
var COLUMN_COUNT = 50; 
var ROW_COUNT = 29; 
var BLOCK_SIZE = 1; 
var factory = new Factory.GameFactory(); 
var board = new Board.Board(COLUMN_COUNT, ROW_COUNT, BLOCK_SIZE); 
var snake = []; 
var direction; 

The first lines are the Qt way to import a JavaScript file from another JavaScript file. Then, we can easily instantiate a factory variable and a 50x29 board variable. The snake array contains all the snake game items instantiated. This array will be useful to move our snake. Finally, the direction variable is a 2D vector handling...