CLI and QCoreApplication - where to start?

[soul_rebel]

I want to write a little program with a CLI. How do I actually implement this?
The Tutorials/examples were not really about CLIs and searching didnt help me yet...

main.cpp:

#include <QCoreApplication>
#include "myapp.h"
 
int main(int argc, char *argv[])
{
      QCoreApplication app(argc, argv);
      MyApp *realApp = new MyApp(argc,argv);
      return realApp->run();
}

#include <QCoreApplication>
#include "myapp.h"

int main(int argc, char *argv[])
{
      QCoreApplication app(argc, argv);
      MyApp *realApp = new MyApp(argc,argv);
      return realApp->run();
}

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doesnt look good, because no eventloop is created...
should i instead let myapp inherit QCoreApplication and just reimplement myapp::exec() to do what i want it to?
Or what is the "right" way to do it?

Thank you very much for your help!

[momesana]

to create an eventloop you need to use QCoreApplication::exec() just like you do with QApplication::exec() in GUI apps.

Insertt app.exec() after myApp->run() and you have your eventloop.

[jacek]

How do I actually implement this?

If you want to use the event loop, your CLI application must be event-driven.

int main( int argc, char **argv )
{
   QCoreApplication app( argc, argv );
   MyApp realApp( argc, argv );
 
   // schedule a call to "run"
   QMetaObject::invokeMethod( & realApp, "run", Qt::QueuedConnection );
   // if you prefer a shorter, but more cryptic way, use:
   // QTimer::singleShot( 0, & realApp, SLOT( run() ) );
 
   return app.exec();
}

int main( int argc, char **argv )
{
   QCoreApplication app( argc, argv );
   MyApp realApp( argc, argv );

   // schedule a call to "run"
   QMetaObject::invokeMethod( & realApp, "run", Qt::QueuedConnection );
   // if you prefer a shorter, but more cryptic way, use:
   // QTimer::singleShot( 0, & realApp, SLOT( run() ) );

   return app.exec();
}

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(of course MyApp::run() has to be a slot).

[soul_rebel]

Thanks for your answers! I actually implemented it Friday and used a SingleShot-Timer like you propose.
That works great!

Also thanks for showing me that QMetaObject::invokeMethod exists
That looks very useful for Threaded Applications with multiple eventLoops.