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

Using C++ Models with QML

So far, we have discussed how to use Models and Views in Qt Widgets and QML. But in most modern applications, you will require Models written in C++ and a frontend written in QML. Qt allows us to define Models in C++ and then access them inside QML. This is convenient for exposing existing C++ data Models or otherwise complex datasets to QML. Native C++ is always the right choice for complex logical operations. It can outperform logic written in QML with JavaScript.

There are many reasons why you should create a C++ Model. C++ is type-safe and compiled into object code. It increases the stability of your application and reduces the number of bugs. It is flexible and can offer more features than the QML types. You can integrate with your existing code or with a third-party library that is written in C++.

You can define a C++ Model using the following classes:

  • QStringList
  • QVariantList
  • QObjectList
  • QAbstractItemModel

The first...