цифры в TableViwer

#include "mytablemodel.h"
 
myTableModel::myTableModel(QObject *parent) :
    QAbstractTableModel(parent)
{
}
int myTableModel::rowCount(const QModelIndex &parent) const
{
    return 31; 
}
int myTableModel::columnCount(const QModelIndex &parent) const
{
    return 13; 
}
 
 
 
QVariant myTableModel::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole) {
        QString unswer = QString("row = ") + QString::number(index.row()) + "  col = " + QString::number(index.column());
        
        return QVariant(unswer);
    }
    return QVariant();
}

#ifndef MYTABLEMODEL_H
#define MYTABLEMODEL_H
 
#include <QAbstractTableModel>
 
class myTableModel : public QAbstractTableModel
{
    Q_OBJECT
private:
    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role) const;
    QVariant headerData ( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
 
public:
    explicit myTableModel(QObject *parent = 0);
 
signals:
 
public slots:
 
};
 
#endif // MYTABLEMODEL_H