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 – sending text messages


What is left is now is to describe how to send a chat massage. On hitting return inside the line edit, a local slot will be called that checks whether there is actual text to send and whether m_socket is still connected:

QString message = m_user + ": " + ui->text->text();
m_socket->write(message.toLocal8Bit());
ui->text->clear();

If so, a message is composed that contains the self-given username, a colon, and the text of the line edit. To send this string to the peer, the QTcpSocket::write() server is called. Since write() only accepts const char* or QByteArray, we use QString::toLocal8Bit() to get QByteArray that we can send over the socket.

That's all. It's like writing and reading from a file. For the complete example, have a look at the sources bundled with this book and run the server and several clients.

Have a go hero – extending the chat with a user list

This example has shown us how to send a simple text. If you now go on and define...