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 your Qt Designer plugin

In Chapter 4, Conquering the Desktop UI, we created a custom Qt widget in Qt Designer using the promoting technique. It is now time to learn how to create a custom Qt widget by building a plugin for Qt Designer. Your widget will be available from the Design mode in the Widget Box, alongside other regular Qt widgets. For this project example, we will create a FilterWidget class that processes an input image to apply a filter. The widget will also display the filter name and a dynamic thumbnail of the filtered picture.

This project is composed of two subprojects:

  • filter-plugin-designer: This is a Qt Designer plugin containing the FilterWidget class and the image-processing code. This plugin is a dynamic library that will be used by the Qt Creator to offer our new FilterWidget in the Form Editor.
  • image-filter: This is a Qt widget application using...