drag and drop with item views

[castorvert]

I found sth strange : when I subclass QAbstractListModel, I have to subclass flags() to have Drag and drop enabled. In QAbstractItemModel, there is only :

Qt::ItemFlags QAbstractItemModel::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return 0;
 
    return Qt::ItemIsSelectable|Qt::ItemIsEnabled;
}

Qt::ItemFlags QAbstractItemModel::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return 0;

    return Qt::ItemIsSelectable|Qt::ItemIsEnabled;
}

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