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

Internationalization with Qt Quick

In the previous section, we discussed internationalization in Qt Widgets. In this section, we will discuss different aspects of internationalizing your Qt Quick application. The underlying localization scheme in Qt Quick applications is similar to Qt Widgets applications. The same set of tools described in the Qt Linguist Manual are also used in Qt Quick. You can translate an application that uses both C++ and QML.

In a Qt project file, the SOURCES variable is used for C++ source files. If you list QML or JavaScript files under this variable, the compiler will attempt to use the files considering them as C++ files. As a workaround, you can use a lupdate_only {...} conditional declaration to make the QML files visible to the lupdate tool but invisible to the C++ compiler.

Consider the following example. The application's .pro file snippet lists two QML files:

lupdate_only {
SOURCES = main.qml \