QMdiArea: no option to make the last QMdiSubWindow inactive

It would be useful if it was possible to determine if a QMdiSubWindow was active or inactive when part of a QMdiArea. The default behaviour is to make the last child window active and to make the next child window in the stack active, based on the order that is set. An option like QMdiArea::NoActivation would be very useful where it was not desired that the child window is activated.