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 Mandelbrot project

The example project of this chapter is the multithreaded calculation of a Mandelbrot fractal. The user will see the fractal and will be able to pan and zoom in on that window.

Before diving into the code, we need a broad understanding of a fractal and how we are going to achieve its calculation.

The Mandelbrot fractal is a numerical set that works with complex numbers (a + bi). Each pixel is associated with a value calculated through iterations. If this iterated value diverges toward infinity, then the pixel is out of the Mandelbrot set. If not, then the pixel is inside the Mandelbrot set.

A visual representation of the Mandelbrot fractal looks like this:

Every black pixel in this image corresponds to a complex number for which the sequence tends to diverge to an infinite value. The white pixels correspond to complex numbers bounded to a finite...