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
1
Section 1: Getting Started with Embedded Qt
5
Section 2: Working with Embedded Qt
10
Section 3: Deep Dive into Embedded Qt
14
Section 4: Advanced Techniques and Best Practices
Appendix A: BigProject Requirements

Printing (PDF)

Would you believe that we have new requirements? They are as follows:

  • Req 25: BigProject shall be able to generate a report of temperature readings for the last 24 hours.
  • Req 26: The report shall be output in PDF format.

Qt to the rescue!

Qt provides printing capabilities, including the ability to output to a PDF file! We will make use of it here.

The basics

While some Qt GUI objects have special print methods that can be invoked to print on QPrinter, many don't. This is because of how Qt chose to support printing.

At the base level, Qt paints GUI objects onto paint devices. When a widget is drawn on the screen, Qt is painting it onto the screen. Printing works essentially the same way. Objects are painted...