Esc does not work for my dialog in non-modal mode, event going to underlying window. Only adding
setWindowModality(Qt::WindowModal);
to the dialog on creation makes the Esc key work and calls the reject()
slot. Is it normal or possible to Esc in/from non-modal dialog?
Changed
dialog->show();
call to
// Shows the dialog as a modal dialog, blocking until the user closes it.
dialog->exec();
Works fine for now. Seems the only way to catch event in the dialog, non-modal does not allow this or use key event filter as mentioned in another answer.