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 – making the button clickable


Thus far, our component only looks like a button. The next task is to make it respond to mouse input. As you may have guessed, this is done by using the MouseArea item.

Add a MouseArea child item to the button and use anchors to make it fill the whole area of the button. Call the element buttonMouseArea. Put the following code in the body of the item:

Rectangle {
  id: button
  // ... 
  Row { ... }
  MouseArea {
    id: buttonMouseArea

    anchors.fill:parent
    onClicked: button.clicked()
  }
}

In addition to this, set the following declaration in the button object just after its ID is declared:

Rectangle {
  id: button

  signal clicked()
  // ...
}

To test the modification, add the following code at the end of the button object definition, just before the closing bracket:

onClicked: console.log("Clicked!")

Then, run the program and click on the button. You'll see your message printed to the Creator's console. Congratulations!

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