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)

Serializing objects in JSON format

The Track and SoundEvent classes can now be converted to a common Qt format, QVariant. We now need to write a Track (and its SoundEvent objects) class in a file with a text or a binary format. This example project allows you to handle all the formats. It will allow you to switch the saved file format in one line.

So where should we put the specific format code? That is the million-dollar question! One primary approach is shown in the following diagram:

In this proposition, the specific file format serialization code is inside a dedicated child class. Well, it works, but what would the hierarchy look like if we added two new file formats? Moreover, each time we add a new object to serialize, we have to create all these child classes to handle the different serialization file formats. This massive inheritance tree can quickly become a sticky mess...