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: "We call the test() function at the MainWindow constructor."

A block of code is set as follows:

void MainWindow::test() 
{ 
   int amount = 100; 
   amount -= 10; 
   qDebug() << "You have obtained" << amount << "apples!"; 
} 

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

MainWindow::MainWindow(QWidget *parent) : 
   QMainWindow(parent), 
   ui(new Ui::MainWindow) 
{ 
   ui->setupUi(this); 
   test(); 
} 

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

********* Start testing of MainWindow ********* 
Config: Using QtTest library 5.9.1, Qt 5.9.1 (i386-little_endian-ilp32 shared (dynamic) debug build; by GCC 5.3.0) 
PASS   : MainWindow::initTestCase() 
PASS   : MainWindow::_q_showIfNotHidden() 
PASS   : MainWindow::testString() 
PASS   : MainWindow::testGui() 
PASS   : MainWindow::cleanupTestCase() 
Totals: 5 passed, 0 failed, 0 skipped, 0 blacklisted, 880ms 
********* Finished testing of MainWindow ********* 

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "The third option is Toggle Bookmark, which lets you set a bookmark for your own reference."