Method mapToSource

examples/Sql/main.cpp:48–51

        return index(sourceIndex.column(), sourceIndex.row());
    }
    QModelIndex mapToSource(const QModelIndex &proxyIndex) const override
    {
        return sourceModel()->index(proxyIndex.column(), proxyIndex.row());
    }
    QModelIndex index(int r, int c, const QModelIndex &ind = QModelIndex()) const override
    {
        Q_UNUSED(ind)