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Hands-On Embedded Programming with Qt

You're reading from   Hands-On Embedded Programming with Qt Develop high performance applications for embedded systems with C++ and Qt 5

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Product type Paperback
Published in Jul 2019
Publisher Packt
ISBN-13 9781789952063
Length 416 pages
Edition 1st Edition
Languages
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Author (1):
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John Werner John Werner
Author Profile Icon John Werner
John Werner
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Table of Contents (22) Chapters Close

Preface 1. Section 1: Getting Started with Embedded Qt FREE CHAPTER
2. Setting Up the Environment 3. Writing Your First Qt Application 4. Running Your First Application on the Target 5. Section 2: Working with Embedded Qt
6. Important Qt Concepts 7. Managing the Overall Workflow 8. Exploring GUI Technologies 9. Adding More Features 10. Section 3: Deep Dive into Embedded Qt
11. Qt in the Embedded World 12. Exploring the IoT with Qt 13. Using More Qt-Related Technologies 14. Section 4: Advanced Techniques and Best Practices
15. Debugging, Logging, and Monitoring Qt Applications 16. Responsive Application Programming - Threads 17. Qt Best Practices 18. Assessments 19. Other Books You May Enjoy Appendix A: BigProject Requirements
1. Appendix B: Bonus Code - Simplifying Q_PROPERTY

Increasing efficiency in Qt

Originally, I was going to call this section Writing faster Qt code, but as I was developing the outline, I realized that what I was really talking about is writing efficient Qt code. Let me explain.

When I was young, unmarried, and living with my parents, I had money to play with so that I could build faster cars. One time, I decided to make the motor of my car more powerful without having to increase its displacement. When I was finished, the car had 50% more horsepower, and when I used the horsepower, it went through fuel 50% faster.

However, I also got something else out of this. I took the car on a long (several hour) expressway trip. What I found was that the fuel economy of the car (when driven like a sane person) went up by 50%. Why? Because in order to get more power out of the engine, I have to increase the efficiency of the engine. I used...

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