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# editablesqlmodel.cpp Example File
sql/querymodel/editablesqlmodel.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtSql>

    #include "editablesqlmodel.h"

    EditableSqlModel::EditableSqlModel(QObject *parent)
        : QSqlQueryModel(parent)
    {
    }

    Qt::ItemFlags EditableSqlModel::flags(
            const QModelIndex &index) const
    {
        Qt::ItemFlags flags = QSqlQueryModel::flags(index);
        if (index.column() == 1 || index.column() == 2)
            flags |= Qt::ItemIsEditable;
        return flags;
    }

    bool EditableSqlModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
    {
        if (index.column() < 1 || index.column() > 2)
            return false;

        QModelIndex primaryKeyIndex = QSqlQueryModel::index(index.row(), 0);
        int id = data(primaryKeyIndex).toInt();

        clear();

        bool ok;
        if (index.column() == 1) {
            ok = setFirstName(id, value.toString());
        } else {
            ok = setLastName(id, value.toString());
        }
        refresh();
        return ok;
    }

    void EditableSqlModel::refresh()
    {
        setQuery("select * from person");
        setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
        setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
        setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
    }

    bool EditableSqlModel::setFirstName(int personId, const QString &firstName)
    {
        QSqlQuery query;
        query.prepare("update person set firstname = ? where id = ?");
        query.addBindValue(firstName);
        query.addBindValue(personId);
        return query.exec();
    }

    bool EditableSqlModel::setLastName(int personId, const QString &lastName)
    {
        QSqlQuery query;
        query.prepare("update person set lastname = ? where id = ?");
        query.addBindValue(lastName);
        query.addBindValue(personId);
        return query.exec();
    }