qt5base-lts/examples/tutorials/modelview/4_headers/mymodel.cpp

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#include "mymodel.h"

MyModel::MyModel(QObject *parent)
    :QAbstractTableModel(parent)
{
}

//-------------------------------------------------------
int MyModel::rowCount(const QModelIndex & /*parent*/) const
{
    return 2;
}

//-------------------------------------------------------
int MyModel::columnCount(const QModelIndex & /*parent*/) const
{
    return 3;
}

//-------------------------------------------------------
QVariant MyModel::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole)
    {
        return QString("Row%1, Column%2")
                .arg(index.row() + 1)
                .arg(index.column() +1);
    }
    return QVariant();
}

//! [quoting mymodel_c]
QVariant MyModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole)
    {
        if (orientation == Qt::Horizontal) {
            switch (section)
            {
            case 0:
                return QString("first");
            case 1:
                return QString("second");
            case 2:
                return QString("third");
            }
        }
    }
    return QVariant();
}
//! [quoting mymodel_c]