How to set two rows in a table view Horizontal header?

[Barmaglodd]

See Model\View programming in QT docs.

ExampleModel is for data in table. It contains _headerModel. _headerModel discribes header structure.
If you want add rows in table, implement rowCount in Example model (now it returns 0, i.e. no rows), and handle DisplayRole in data.

QVariant data(const QModelIndex& index, int role) const
{
	if(role==Qt::UserRole)
	{
		QVariant v;
		v.setValue((QObject*)&_headerModel);
		return v;
	}
	if(role==Qt::DisplayRole && index.isValid())
	{
		return QString("row %1 column %2").arg(index.row()).arg(index.column());
	}
	return QVariant();
}

QVariant data(const QModelIndex& index, int role) const
{
	if(role==Qt::UserRole)
	{
		QVariant v;
		v.setValue((QObject*)&_headerModel);
		return v;
	}
	if(role==Qt::DisplayRole && index.isValid())
	{
		return QString("row %1 column %2").arg(index.row()).arg(index.column());
	}
	return QVariant();
}

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