Book Image

Hands-On GUI Programming with C++ and Qt5

By : Lee Zhi Eng
Book Image

Hands-On GUI Programming with C++ and Qt5

By: Lee Zhi Eng

Overview of this book

Qt 5, the latest version of Qt, enables you to develop applications with complex user interfaces for multiple targets. It provides you with faster and smarter ways to create modern UIs and applications for multiple platforms. This book will teach you to design and build graphical user interfaces that are functional, appealing, and user-friendly. In the initial part of the book, you will learn what Qt 5 is and what you can do with it. You will explore the Qt Designer, discover the different types of widgets generally used in Qt 5, and then connect your application to the database to perform dynamic operations. Next, you will be introduced to Qt 5 chart which allows you to easily render different types of graphs and charts and incorporate List View Widgets in your application. You will also work with various Qt modules, like QtLocation, QtWebEngine, and the networking module through the course of the book. Finally, we will focus on cross-platform development with QT 5 that enables you to code once and run it everywhere, including mobile platforms. By the end of this book, you will have successfully learned about high-end GUI applications and will be capable of building many more powerful, cross-platform applications.
Table of Contents (18 chapters)

Creating a paint program

In the following section, we will move over to the realm of pixels and learn how to create a paint program using Qt. Users will be able to express their creativity by using different sizes and colors of the brush to draw pixel images!

Setting up a user interface

Again, for this example, we will create a new Qt Widget Application. After that, open up mainwindow.ui and add a menu bar to the main window. Then, add the following options to the menu bar:

We have three menu items on the menu bar—File, Brush Size, and Brush Color. Under the File menu are functions for saving the canvas into a bitmap file, as well as clearing the entire canvas. The Brush Size category contains different options for...