QListView with QAbstractListModel shows an empty list

Question

I have created a very simple example of QListView with a custom QAbstractListModel. The QListView is displayed but it is empty.

Answer 1

Your methods data should return "a" only if role = Qt::DisplayRole. Otherwise, it returns "a" for every role.

So, add a simple test and it will work :

  QVariant data( const QModelIndex & index, int role = Qt::DisplayRole ) const
{
    if ( role == Qt::DisplayRole ) {
      return "a";
    }
    return QVariant();
}