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)

Displaying a picture with PictureWidget

This widget will be called to display a picture at its full size. We also add some buttons to go to the previous/next picture or delete the current one.

Let's start to analyze the PictureWidget.ui form, here is the design view:

Here are the details:

  • backButton: Requests to display the gallery
  • deleteButton: Removes the picture from the album
  • nameLabel: Displays the picture name
  • nextButton: Selects the next picture in the album
  • previousButton: Selects the previous picture in the album
  • pictureLabel: Displays the picture

We can now take a look at the PictureWidget.h header:

#include <QWidget> 
#include <QItemSelection> 
namespace Ui { 
class PictureWidget; 
class PictureModel; 
class QItemSelectionModel; 
class ThumbnailProxyModel; 
class PictureWidget : public QWidget 
    explicit PictureWidget...