Book Image

Game Programming Using Qt: Beginner's Guide

By : Lorenz Haas, Witold Wysota, Witold Wysota, Lorenz Haas
Book Image

Game Programming Using Qt: Beginner's Guide

By: Lorenz Haas, Witold Wysota, Witold Wysota, Lorenz Haas

Overview of this book

Qt is the leading cross-platform toolkit for all significant desktop, mobile, and embedded platforms and is becoming more popular by the day, especially on mobile and embedded devices. Despite its simplicity, it's a powerful tool that perfectly fits game developers’ needs. Using Qt and Qt Quick, it is easy to build fun games or shiny user interfaces. You only need to create your game once and deploy it on all major platforms like iOS, Android, and WinRT without changing a single source file. The book begins with a brief introduction to creating an application and preparing a working environment for both desktop and mobile platforms. It then dives deeper into the basics of creating graphical interfaces and Qt core concepts of data processing and display before you try creating a game. As you progress through the chapters, you’ll learn to enrich your games by implementing network connectivity and employing scripting. We then delve into Qt Quick, OpenGL, and various other tools to add game logic, design animation, add game physics, and build astonishing UI for the games. Towards the final chapters, you’ll learn to exploit mobile device features such as accelerators and sensors to build engaging user experiences. If you are planning to learn about Qt and its associated toolsets to build apps and games, this book is a must have.
Table of Contents (18 chapters)
Game Programming Using Qt
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Time for action – adding properties to the board class


In this exercise, we will be adding a useful property to the board class. The property is going to hold information about the player who should make the next move. The type of the property is going to be the TicTacToeWidget::Player enumeration that we created earlier. For the getter and the setter methods, we are going to use the two functions that we created earlier: currentPlayer() and setCurrentPlayer().

Open the header file for our class and modify the class definition as shown in the following code:

class TicTacToeWidget : public QWidget {
  Q_OBJECT
  Q_ENUMS(Player)
  Q_PROPERTY(Player currentPlayer READ currentPlayer
  WRITE setCurrentPlayer
  NOTIFY currentPlayerChanged)
public:
  enum Player { Invalid, Player1, Player2, Draw };

What just happened?

Since we want to use an enumeration as a type of a property, we have to inform Qt's meta-object system about the enum. This is done with the Q_ENUMS macro. Then, we declare a property...