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 Widgets

In the previous sections, we discussed how to create translation files and how to use QTranslator to load a translation file. Let's create a simple example using Qt Widgets and implement our learning.

Follow the subsequent steps to create the sample application:

  1. Create a Qt Widgets-based application using Qt Creator's new project creation wizard and follow through the screens as discussed in earlier chapters.
  2. On the Translation File screen, choose German (Germany) as the language option, or any preferred language.
  3. Finish the project creation. You will see that Simplei18nDemo_de_DE.ts is created in your project structure.
  4. Next, you add a QLabel to the .ui file and add Welcome text.
  5. Next, run lupdate. You can run lupdate from the command line as well as from the Qt Creator interface, as shown in Figure 11.3:

    Figure 11.3 – Qt Linguist options in Qt Creator

  6. When you run lupdate, you will see the following...