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

Optimizing C++ code

In most Qt applications, a significant part of the coding is done in C++, hence you should be aware of C++ optimization tricks. This section is about implementing some of the best practices while writing C++ code. When C++ implementations are written without optimization, they run slowly and consume a lot of resources. Better optimization of your C++ code also offers better control over memory management and copying. There are many opportunities to improve algorithms, ranging from small logical blocks to using Standard Template Libraries (STLs), to writing better data structures and libraries. There are several excellent books and articles on this topic. We will be discussing a few important points for running code faster and using fewer resources.

Some of the important C++ optimization techniques are listed here:

  • Focus on algorithms, not on micro-optimization
  • Don't construct objects and copy unnecessarily
  • Use C++11 features such as move...