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)

Configuring the project for Linux

OpenCV binaries are certainly available in official software repositories. Depending on your distribution and your package manager, you can install it with commands such as the following:

# On Debian system    
apt-get install libopencv-dev

# On Red Hat system yum install opencv

When OpenCV is installed on your Linux, you can add this snippet to the file:

linux { 
    target.path = $$(QTDIR)/../../Tools/QtCreator/lib/Qt/plugins/designer/ 
     CONFIG += link_pkgconfig 
    PKGCONFIG += opencv 

This time, we do not use the LIBS variable but PKGCONFIG, which relies on pkg-config.

It is a helper tool that will insert the correct options into the compile command line. In our case, we will request pkg-config to link our project with OpenCV.

You can list all the libs managed by pkg-config with the pkg-config --list-all...