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)

Creating a new album from a custom InputDialog

The AlbumListPage needs some data to display. The next step is to be able to add a new album. To do this, at some point, we will have to call an AlbumModel function from QML in order to add this new album. Before building the UI, we have to make a small modification to gallery-core.

The AlbumModel function is already available in QML. However, we cannot directly call AlbumModel::addAlbum(const Album& album) from the QML code: the QML engine will not recognize the function and will throw an error: TypeError: Property 'addAlbum' of object AlbumModel(...) is not a function. This can be fixed by simply decorating the desired function with the Q_INVOKABLE macro (as we did for PictureModel::setAlbumId()).

Nonetheless, there is a second issue here: Album is a C++ class that is not recognized in QML. If we wanted to have full...