QDialog: show() and exec() together in constructor?

[wysota]

How about:

MyDialog d;
QTimer::singleShot(0, &d, SLOT(doTimeConsumingTask()));
d.exec();

MyDialog d;
QTimer::singleShot(0, &d, SLOT(doTimeConsumingTask()));
d.exec();

To copy to clipboard, switch view to plain text mode 

This should execute the slot immediately when d.exec() is called (provided that the event will not make it to a wrong queue). The drawback is that you will block the event loop if you do everything in the slot at once. So either do it the way J-P mentioned or split the task into subtasks, put each in a separate slot and as the last line of each slot start a timer that will trigger the next slot.