No, you should be returning the logical AND of whatever flags there already are (QStringListModel:: flags()) with the bitwise NOT of Qt:: ItemIsDropEnabled. My original post had a logical OR, and I realized the mistake and fixed it a bit later.

Qt Code: 
  1. return QStringListModel::flags( index ) & ~Qt::ItemIsDropEnabled;
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Your code doesn't compile because you left out the "index" argument to the superclass call. In this case, I also left out the argument, but seriously, you have to look at what the compiler is telling you and figure out what is wrong.