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

Chapter 12: Performance Considerations

In this chapter, we will give you an overview of performance optimization techniques and how you can apply them in the context of Qt-based application development. Performance is a very important factor in the success of your application. Performance failures can result in business failures, poor customer relationships, a reduction in competitiveness, and revenue loss. Delaying performance optimization can have a huge cost in terms of your reputation and organizational image. Therefore, it is important to do performance tuning.

You will also learn about performance bottlenecks and how to overcome them. We will discuss different profiling tools to diagnose performance problems, focusing specifically on some popular tools. Then, you will learn how to profile and benchmark performance. The chapter also introduces Qt Modeling Language (QML) Profiler and Flame Graph to find underlying bottlenecks in your Qt Quick application. You will also learn...