The command-line interface can be a wonderful way to start your application with some specific options. The Qt framework provides an easy way to define your options with the QCommandLineParser class. You can provide a short (for example, -t) or a long (for example, --test) option name. The application version and help menu is automatically generated. You can easily retrieve in your code if an option is set or not. An option can take a value and you can define a default value.
For example, we can create a CLI to configure the log files. We want to define three options:
The
-debugcommand, if set, enables the log file writingThe
-for--filecommand to define where to write the logsThe
-lor--level <level>command to specify the minimum log level
Look at the following snippet:
QCoreApplication app(argc, argv);
QCoreApplication::setApplicationName("ch14-hat-tips");
QCoreApplication::setApplicationVersion("1.0.0");
QCommandLineParser...