Question

In Qt, what is the most elegant way to pass data from a QDialog subclass to the component that started the dialog in the cases where you need to pass down something more complex than a boolean or an integer return code?

I’m thinking emit a custom signal from the accept() slot but is there something else?

Answer 1

QDialog has its own message loop and since it stops your application workflow, I usually use the following scheme:

MyQDialog dialog(this);
dialog.setFoo("blah blah blah");
if(dialog.exec() == QDialog::Accepted){
  // You can access everything you need in dialog object
  QString bar = dialog.getFoo();
}