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

Writing source code for translation

In this section, we will discuss how to mark strings as translatable strings and how to use the tools provided by Qt. Wherever your application uses a quoted string that is visible to the user, make sure the QCoreApplication::translate() method processes it. To do this, simply use the tr() method to mark the strings as translatable that are meant for display purposes. This feature is used to show which text strings are translatable inside your C++ source files.

For example, if you want to use a QLabel to show text on a user interface, then embed the text inside the tr() method as follows:

QLabel *label = new QLabel(tr("Welcome"));

The class name is the translation context for the QObject and its derived classes. To override the context, QObject-derived classes must use the Q_OBJECT macro in their class definition. This macro sets the context for the derived classes.

Qt provides several convenience macros and methods for internationalization...