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

States, state machine, and transitions in Qt Quick

Qt Quick states are property configurations in which a property's value can change to reflect different states. State changes cause abrupt changes in property; animations smooth transitions to create visually appealing state changes. Types for creating and executing state graphs in QML are provided by the Declarative State Machine Framework. Consider using the QML states and transitions for user interfaces with multiple visual states that are independent of the application's logical state.

You can import the state machine module and the QML types into your application by adding the following statement:

import QtQml.StateMachine

Please note that there are two ways to define the states in QML. One is provided by QtQuick and the other by the QtQml.StateMachine module.

Important note

While using QtQuick and QtQml.StateMachine in a single QML file, make sure to import QtQml.StateMachine after QtQuick. In this approach...