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

Using concurrency, parallelism, and multithreading

Since you are already a C++ developer, you might be aware of these terms, which may be used interchangeably. However, there are differences in these terms. Let's revisit these terms here:

  • Concurrency is the execution of multiple programs at the same time (concurrent).
  • Parallelism is the simultaneous running of a portion of your program in parallel, utilizing the multiple cores in a multi-core processor.
  • Multithreading is the capability of a central processing unit (CPU) to run multiple threads for the same program, concurrently supported by the operating system.

For example, you may launch multiple instances of a Portable Document Format (PDF) reader and Qt Creator. Qt Creator can run multiple tools by itself. Your system Task Manager can show you all the processes running simultaneously. This is known as concurrency. It is also commonly known as multitasking.

But if you use parallel computing techniques...