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)
1
Section 1: The Basics
6
Section 2: Cross-Platform Development
8
Section 3: Advanced Programming, Debugging, and Deployment

Testing Qt Quick applications

Qt Quick Test is a framework created for the unit testing of Qt Quick applications. Test cases are written in JavaScript and use the TestCase QML type. Functions with names beginning with test_ are identified as test cases that need to be executed. The test harness recursively searches for the required source directory for tst_ *.qml files. You can keep all test .qml files under one directory and define the QUICK_TEST_SOURCE_DIR. If it is not defined, then only .qml files available in the current directory will be included during test execution. Qt doesn't ensure binary compatibility for the Qt Quick Test module. You have to use the appropriate version of the module.

You have to add QUICK_TEST_MAIN() to the C++ file to begin the execution of the test cases, as shown next:

#include <QtQuickTest>
QUICK_TEST_MAIN(testqml)

You need to add the qmltest module to enable Qt Quick Test. Add the following lines of code to the .pro file:

QT...