rowCount does not update after removing widgets from grid layout

[Lykurg]

Well it really only increases. But also consider following:

QGridLayout l;
QWidget *w = new QWidget;
l.addWidget(w, 3, 0);
qWarning() << l.rowCount();

QGridLayout l;
QWidget *w = new QWidget;
l.addWidget(w, 3, 0);
qWarning() << l.rowCount();

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it will return 4. So the row property is not what you are expecting!
And do you need the grid functionality because a QVBoxLayout should work like you expect it.