class CorrespondenceModel
    :   public QStandardItemModel
{
public:
    CorrespondenceModel( QObject * parent = 0 )
        :   QStandardItemModel( 0, 2, parent )
    {
        setHeaderData( 0, Qt::Horizontal, tr( "Excel file" ) );
        setHeaderData( 1, Qt::Horizontal, tr( "Format" ) );
    }

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

        if( index.column() == 1 )
            return Qt::ItemIsEditable | Qt::ItemIsSelectable |
                Qt::ItemIsUserCheckable | Qt::ItemIsEnabled;
        else
            return Qt::ItemIsSelectable | Qt::ItemIsUserCheckable |
                Qt::ItemIsEnabled;
    }

    void insertRow( const QString & excelFile,
        const QString & format )
    {
        beginInsertRows( QModelIndex(), 0, 0 );

        QStandardItemModel::insertRow( 0 );

        setData( index( 0, 0, QModelIndex() ),
            excelFile, Qt::DisplayRole );
        setData( index( 0, 1, QModelIndex() ),
            format, Qt::DisplayRole );

        endInsertRows();
    }

    QString excelFile( int row ) const
    {
        return data( index( row, 0 ) ).toString();
    }

    QString format( int row ) const
    {
        return data( index( row, 1 ) ).toString();
    }
}; // class CorrespondenceModel