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)

Architecting the drum machine project

As usual, before diving into the code, let's study the structure of the project. The aim of the project is to be able to do the following:

  • Play and record a sound track from a drum machine
  • Save this track to a file and load it to play it back

To play a sound, we will lay out four big buttons that will play a specific drum sound upon being clicked (or upon a keyboard event): a kick, a snare, a hi-hat, and a cymbal crash. These sounds will be .wav files that are loaded by the application. The user will be able to record their sequence of sounds and replay it.

For the serialization, we do not just want to save the track to a single file format—we would rather save it to the following three file formats:

  • JavaScript Object Notation (JSON)
  • eXtensible Markup Language (XML)
  • Binary

Not only is it more fun to cover three formats, but...