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)

Benchmarking your code

Qt Test also provides a very easy-to-use semantic to benchmark the execution speed of your code. To see it in action, we will benchmark the time it takes to save Track in the JSON format. The duration of the serialization depends of the track length (the number of SoundEvents).

Of course, it is more interesting to benchmark this feature with different track lengths and see whether the time saved is linear. Datasets come to the rescue! It is not only useful to run the same function with expected input and output, but also to run the same function with different parameters.

We will start by creating the dataset function in TestJsonSerializer:

class TestJsonSerializer : public QObject 
{ 
    ... 
 
private slots: 
    void cleanup(); 
    void saveDummy(); 
    void loadDummy(); 
 
    void saveTrack_data(); 
    ... 
}; 
 
void TestJsonSerializer::saveTrack_data...