Book Image

Hands-On Embedded Programming with Qt

By : John Werner
Book Image

Hands-On Embedded Programming with Qt

By: John Werner

Overview of this book

Qt is an open source toolkit suitable for cross-platform and embedded application development. This book uses inductive teaching to help you learn how to create applications for embedded and Internet of Things (IoT) devices with Qt 5. You’ll start by learning to develop your very first application with Qt. Next, you’ll build on the first application by understanding new concepts through hands-on projects and written text. Each project will introduce new features that will help you transform your basic first project into a connected IoT application running on embedded hardware. In addition to gaining practical experience in developing an embedded Qt project, you will also gain valuable insights into best practices for Qt development and explore advanced techniques for testing, debugging, and monitoring the performance of Qt applications. The examples and projects covered throughout the book can be run both locally and on an embedded platform. By the end of this book, you will have the skills you need to use Qt 5 to confidently develop modern embedded applications.
Table of Contents (22 chapters)
Free Chapter
Section 1: Getting Started with Embedded Qt
Section 2: Working with Embedded Qt
Section 3: Deep Dive into Embedded Qt
Section 4: Advanced Techniques and Best Practices
Appendix A: BigProject Requirements

Saving settings

Up until now, there have been many hardcoded configuration and user settings. Some of them can be set through the GUI, but others have only been changeable by editing the code and recompiling. Even the ones that can be set through the GUI always start with a hardcoded value and not with the last setting that was made. It's time we changed things so that settings are preserved between runs and so that we can make changes without rebuilding the code.

To do this, we will use the QSettings class. QSettings provides cross-platform support for saving and restoring program settings.

Searching for settings

Before we can use QSettings, it would be useful to figure out what settings we need. The first ones that...