qSort doesn't work with member function

[Gopala Krishna]

OK, thank you, that would be doable.
Meanwhile I made the proxymodel work,just had to call
proxyModel->sort(0, Qt::AscendingOrder);
after reimplementing lessThan().

Oh ok fine. You just wanted to sort. Since you were blaming TT for design issue I thought you wanted to use qSort in your code rather than sort them.
Sorry for misunderstanding!