I'm pretty much a newbie at C++ and Qt, but here is what I got from the debug process:

0 MainWindow:penLog mainwindow.cpp 147
1 NewLog::createLog newlog.cpp 51
2 NewLog::qt_metacall moc_newlog.cpp 66
3 QMetaObject::activate qobject.cpp 3104
4 QMetaObject::activate qobject.cpp 3198
5 QAbstractButton::clicked moc_qabstractbutton.cpp 200
6 QAbstractButtonPrivate::emitClicked qabstractbutton.cpp 543
7 QAbstractButtonPrivate::click qabstractbutton.cpp 536
8 QAbstractButton::mouseReleaseEvent qabstractbutton.cpp 1115
9 QWidget::event qwidget.cpp 7554
10 QAbstractButton::event qabstractbutton.cpp 1077
11 QPushButton::event qpushbutton.cpp 662
12 QApplicationPrivate::notify_helper qapplication.cpp 4065
13 QApplication::notify qapplication.cpp 3767
14 QCoreApplication::notifyInternal qcoreapplication.cpp 610
15 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 216
16 QApplicationPrivate::sendMouseEvent qapplication.cpp 2924
17 QETWidget::translateMouseEvent qapplication_win.cpp 3268
18 QtWndProc qapplication_win.cpp 1667
19 USER32!GetDC C:\WINDOWS\system32\user32.dll 0
20 ?? 0
21 ?? 0
22 ?? 0

Is this what you meant?