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)

The .pro file in depth

When you click on the Build button, what exactly is Qt Creator doing? How does Qt handle the compilation of the different platforms with a single .pro file? What does the Q_OBJECT macro imply, exactly? We will dig into each of these questions in the following sections. Our example case will be the SysInfo application we just completed and we will study what Qt is doing under the hood.

We can start this study by digging into the .pro file. It is the main entry point for compiling any Qt project. Basically, a .pro file is a qmake project file that describes the sources and headers used by the project. It is a platform-agnostic definition of a Makefile. First, we can cover the different qmake keywords used in the ch02-sysinfo application:

#------------------------------------------------- 
# 
# Project created by QtCreator 2016-03-24T16:25:01 
# 
#--------...