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README.md

Mastering Qt 5 - First Edition (December 2016)

This is the code repository for the book Mastering Qt 5 - First Edition, published by Packt. It contains all the supporting project files necessary to work through the book from start to finish.

Book editions

Authors

Guillaume Lazar and Robin Penea are software engineers living near Paris in France. They founded NeuronalMotion together in 2014 to implement their vision of entrepreneurship and project development. They aim to achieve a self-organized company.

Book description

We aim to teach the reader to be proficient with Qt mechanisms to resolve real world problems. We put a strong focus on the latest version of C++14 to see how it can fit with a well designed Qt 5 application.

Here is a summary of the covered topics:

  • Create stunning UIs with Qt Widget and Qt Quick
  • Develop powerful, cross-platform applications with the Qt framework
  • Design GUIs with the Qt Designer and build a library in it for UI preview
  • Handle user interaction with the Qt signal/slot mechanism in C++
  • Prepare a cross-platform project to host a third-party library
  • Build a Qt application using the OpenCV API
  • Use the Qt Animation framework to display stunning effects
  • Deploy mobile apps with Qt and embedded platforms

Technical instructions

  • All the code in this book can be compiled and run from Qt Creator using Qt 5.7. You can do it from your preferred OS: Windows, Linux, or Mac OS.
  • About the mobile-specific chapters, either an Android or an iOS device works, but it is not mandatory (the simulator/emulator can be enough).
  • Chapter 6, Even Qt deserves a slice of Raspberry Pi, offers to build an application running on a Raspberry Pi. Although it is more fun if we can do it with a real Raspberry Pi, it is not necessary to have one to complete the chapter.

Errata

Official Packt errata page is https://www.packtpub.com/books/content/support/25651

Chapter 2

  • Add charts in .pro file, page 49/54/58 (paper book)
    • Your QT module import should be "QT += core gui charts"
    • Check the file ch02-sysinfo.pro
  • The MainWindow must define a QHBoxLayout
    • The application will crash with no layout in MainWindow
    • You can update your MainWindow.ui like this MainWindow.ui
    • Or you can add "ui->centralWidget->setLayout(new QHBoxLayout());" in the MainWindow constructor
    • Check this question on StackOverflow
  • CpuWidget typo, page 63 (paper book)
    • "we have to include the Q_OBJECT macro to allow CpuWidget" (not CPUWidget)
  • Run the application too soon, page 65 (paper book)
    • "If you run the pplication, you should see something like this", in fact you can't run the application at this step because CpuWidget::updateSeries() is a pure virual function and we implement the body function at the page 66!
    • Page 46, there is a typo the Windows structure name, is is FILETIME and not FILEFTIME
    • Page 47, in the second bullet point, the sentence should be "The second one is retrieved when the cpuRawData() function is called

Chapter 5

  • Cache issue in PictureImageProvider::pictureFromCache(), page 189 (paper book)
    • Replace "mPicturesCache.contains(pictureSize)" by "mPicturesCache.contains(key)"
    • Replace "mPicturesCache[pictureSize]" by "mPicturesCache[key]"
    • Check the updated file PictureImageProvider.cpp

Chapter 6

  • Qt3D API instability
    • Due to some changes of the Qt3D module from Qt 5.7, the code has been updated and tested for Qt 5.10.1
    • Check this commit

Chapter 12

  • Executing your tests
    • Page 435 (ebook) or page 444 (paperbook),The correct include is: #include "testjsonserializer.moc"

Chapters description

Chapter 1, Get Your Qt Feet Wet

Lays the fundamentals of Qt and refreshes your memory with a todo application. This chapter covers the Qt project structure, how to use the designer, basic principles of the signals and slots mechanism, and introduces new features of C++14.

Chapter 2, Discovering QMake Secrets

Takes a deep dive in the heart of the Qt compilation system: qmake. This chapter will help you understand how it works, how to use it, and how you can structure a Qt application with platform-specific code by designing a system monitoring application.

Chapter 3, Dividing Your Project and Ruling Your Code

Analyzes the Qt model/view architecture and how a project can be organized by developing a custom library with the core logic of the application. The project example is a persistent gallery application.

Chapter 4, Conquering the Desktop UI

Studies the UI perspective of the model/view architecture with a Qt Widget application relying on the library completed in the previous chapter.

Chapter 5, Dominating the Mobile UI

Adds the missing part of the gallery application with the mobile version (Android and iOS); the chapter covers it with the use of QML, Qt Quick controls, and QML / C++ interactions.

Chapter 6, Even Qt Deserves a Slice of Raspberry Pi

Continues to the road on Qt Quick application with the Qt 3D perspective. This chapter covers how to build a 3D snake game targeted at the Raspberry Pi.

Chapter 7, Third-Party Libraries Without a Headache

Covers how a third-party library can be integrated in a Qt project. OpenCV will be integrated with an image filter application that also provides a custom QDesigner plugin.

Chapter 8, Animations, It’s Alive, Alive!

Extends the image filter application by adding animations and the ability to distribute a custom SDK to let other developers add their own filters.

Chapter 9, Keeping Your Sanity with Multithreading

Investigates the multithreading facilities provided by Qt by building a multithreaded Mandelbrot fractal drawing application.

Chapter 10, Need IPC? Get Your Minions to Work

Broadens the Mandelbrot fractal application by moving the calculation to other processes and managing the communication using sockets.

Chapter 11, Having Fun with Serialization

Covers multiple serialization formats (JSON, XML, and binary) inside a drum machine application in which you can record and load sound loops.

Chapter 12, You Shall (Not) Pass with QTest

Adds tests to the drum machine application and studies how the Qt Test frameworks can be used to make unit tests, benchmarking, and GUI events simulation.

Chapter 13, All Packed and Ready to Deploy

Gives insights into how to package an application on all desktop OSes (Windows, Linux, and Mac OS) and mobile platforms (Android and iOS).

Chapter 14, Qt Hat Tips and Tricks

Gathers some tips and tricks to develop with Qt with pleasure. It shows how to manage sessions in Qt Creator, useful Qt Creator keyboard shortcuts, how you can customize the logging, save it to disk, and much more.

Other Qt books of the same publisher

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