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)

Designing a cross-platform project

We want to display some visual gauges and chart widgets, so create a new Qt widgets Application called ch02-sysinfo. As already discussed in Chapter 1, Get Your Qt Feet Wet, Qt Creator, will generate some files for us: main.cpp, MainWindow.h, MainWindow.cpp, and MainWindow.ui.

Before diving into the C++ code, we must think about the software's architecture. This project will handle multiple desktop platforms. Thanks to the combination of C++ and Qt, most of the source code will be common to all targets. However, to retrieve both the CPU and memory usage from the OS (operating system), we will use some platform-specific code.

To successfully achieve this task, we will use two design patterns:

  • Strategy pattern: This is an interface that describes functionalities (for example, retrieve CPU usage) and specific behaviors (retrieve CPU usage...