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)

Protecting your code with a smart pointer

The code we just described is fully functional. But it can be strengthened, specifically with the AlbumDao::albums() function. In this function, we iterate through the database rows and create a new Album to fill a list. We can zoom in on this specific code section:

QVector<Album*> list; 
while( { 
    Album* album = new Album(); 
return list; 

Let's say that the name column has been renamed to title. If you forget to update query.value("name"), you might run into trouble. The Qt framework does not rely on exceptions, but this cannot be said for every API available in the wild. An exception here would cause a memory leak: the Album* album function has...