Highlight text given a search string

Hello all, I'm going to link my stack overflow question here rather than type it all out again since it was quite a bit to explain and the question is a very thorough question. You can view it here:
http://stackoverflow.com/questions/3...-string-in-qt5

What I'm trying to do is, given the list of QModelIndexes returned from QAbstractItemModel::match, I want to highlight just the part of the Qt::DisplayRole that contains the string that was searched for. Please read that stack overflow post as it thoroughly explains the problem. I wouldn't be asking here but it is important that I figure it out, and I've spent 4 days already of research, reading docs, reading Qt source, and asking in the Qt IRC.

This is such a common feature that it seems like somebody would have figured it out by now, but it seems that is not the case. Any help would be greatly appreciated!