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

QPainter and 2D graphics

Qt comes with an advanced windowing, painting, and typography system. The most important classes in the Qt GUI module are QWindow and QGuiApplication. This module includes classes for 2D graphics, imaging, fonts, and advanced typography. Additionally, the GUI module comes with classes for integrating windowing systems, OpenGL integration, event handling, 2D graphics, basic imaging, fonts, and text. Qt's user interface technologies use these classes internally, but they can directly be used to write applications that use low-level OpenGL graphics APIs.

Depending on the platform, the QWindow class supports rendering with OpenGL and OpenGL ES. Qt includes the QOpenGLPaintDevice class, which allows the use of OpenGL accelerated QPainter rendering and several convenience classes. These convenience classes simplify writing code in OpenGL by hiding the complexities of extension handling and the differences between OpenGL ES 2.0 and desktop OpenGL. QOpenGLFunctions...