https://forum.qt.io/topic/3160/qtimespan-interest
QTimeSpan: interest? | Qt Forum
Jan 2, 2017 - Hi, Quite a while ago on the qt-interest mailinglist, a "question":http://lists.qt.nokia.com/pipermail/qt-interest/2010-June/024344.html on how to substract ...
interestqtforum