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

Getting to know Qt's property system

Qt's property system is similar to some other compiler vendors. However, it provides a cross-platform advantage and works with standard compilers supported by Qt on different platforms. To add a property, you must add the Q_PROPERTY() macro to the QObject derived class. This property acts like a class data member, but it provides extra features that are available through the Meta-Object System. A simple syntax looks as follows:

Q_PROPERTY(type variableName READ getterFunction 
           WRITE setterFunction  NOTIFY signalName)

In the preceding syntax, we used some of the most common parameters. But there are more parameters that are supported in the syntax. You can find out more by reading the Qt documentation. Let's have a look at the following code snippet, which uses the MEMBER parameter:

     Q_PROPERTY(QString text MEMBER m_text...