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

Building a simple Qt application

Let's start with a simple Hello World project. A Hello World program is a very simple program that displays Hello World! and checks that the SDK configuration is free from errors. These projects use the most basic, very minimal code. For this project, we will use a project skeleton created by Qt Creator.

Follow these steps to build your first Qt application:

  1. To create a new project in Qt, click on the File menu option on the menu bar or hit Ctrl + N. Alternatively, you can also click on the + New button located at the welcome screen to create a new project, as shown in Figure 2.3:

    Figure 2.3 – New project interface

  2. Next, you can select a template for the project. You can create different types of applications, including a console application or GUI application. You can also create non-Qt projects as well as library projects. In the upper-right section, you will see a dropdown to filter templates specific to the desired target...