To get the most out of this book

As already stated, this book is aimed at intermediate Qt developers. You should be able to write small- to medium-sized Qt programs in C++ and QML using Qt Creator as an IDE on Windows 10.

You don't need to install any software before you start. Instructions will be provided at the point where specific software is needed. We will use exclusively open source programs so you won't have to purchase any licences.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On High Performance Programming with Qt 5. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/9781789531244_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "As could be seen in the previous example, Qt Test defines macros to specify pass/fail criteria for tests, namely, QCOMPARE() and QVERIFY()."

A block of code is set as follows:

QSignalSpy spy(tstPushBtn, SIGNAL(clicked()));  QTest::mouseClick(tstPushBtn, Qt::LeftButton);
QCOMPARE(spy.count(), 1);

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

QSignalSpy spy(tstPushBtn, SIGNAL(clicked()));  QTest::mouseClick(tstPushBtn, Qt::LeftButton);
QCOMPARE(spy.count(), 1);

Any command-line input or output is written as follows:

$ mkdir Qt
$ cd Qt

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Unfortunately, results displayed in the Test Result pane don't seem to work with QML tests with the Qt Creator version used in this book. We have to run a QML test project in the Projects view."

Warnings or important notes appear like this.

Tips and tricks appear like this.