Book Image

Cross-Platform Development with Qt 6 and Modern C++

By : Nibedit Dey
Book Image

Cross-Platform Development with Qt 6 and Modern C++

By: Nibedit Dey

Overview of this book

Qt is a cross-platform application development framework widely used for developing applications that can run on a wide range of hardware platforms with little to no change in the underlying codebase. If you have basic knowledge of C++ and want to build desktop or mobile applications with a modern graphical user interface (GUI), Qt is the right choice for you. Cross-Platform Development with Qt 6 and Modern C++ helps you understand why Qt is one of the favorite GUI frameworks adopted by industries worldwide, covering the essentials of programming GUI apps across a multitude of platforms using the standard C++17 and Qt 6 features. Starting with the fundamentals of the Qt framework, including the features offered by Qt Creator, this practical guide will show you how to create classic user interfaces using Qt Widgets and touch-friendly user interfaces using Qt Quick. As you advance, you'll explore the Qt Creator IDE for developing applications for multiple desktops as well as for embedded and mobile platforms. You will also learn advanced concepts about signals and slots. Finally, the book takes you through debugging and testing your app with Qt Creator IDE. By the end of this book, you'll be able to build cross-platform applications with a modern GUI along with the speed and power of native apps.
Table of Contents (17 chapters)
Section 1: The Basics
Section 2: Cross-Platform Development
Section 3: Advanced Programming, Debugging, and Deployment

Understanding Qt Quick Controls

Qt Quick Controls provides a set of UI elements that can be used to build a fluid UI using Qt Quick. To avoid ambiguity with widgets, we will use the term controls for UI elements. Qt Quick Controls 1 was originally designed to support desktop platforms. With the evolution of mobile devices and embedded systems, the module required changes to meet performance expectations. Hence, Qt Quick Controls 2 was born, and it further enhanced support for mobile platforms. Qt Quick Controls 1 has been deprecated since Qt 5.11 and has been removed from Qt 6.0. Qt Quick Controls 2 is now simply known as Qt Quick Controls.

The QML types can be imported into your application using the following import statement in your .qml file:

import QtQuick.Controls

Important note

In Qt 6, there are certain changes in the QML import and versioning system. The version numbers have been kept optional. If you import a module without specifying the version number, then...