Long live Qt 4.5!

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diff --git a/examples/sql/sqlwidgetmapper/window.cpp b/examples/sql/sqlwidgetmapper/window.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtSql>
+
+#include "window.h"
+
+//! [Set up widgets]
+Window::Window(QWidget *parent)
+    : QWidget(parent)
+{
+    setupModel();
+
+    nameLabel = new QLabel(tr("Na&me:"));
+    nameEdit = new QLineEdit();
+    addressLabel = new QLabel(tr("&Address:"));
+    addressEdit = new QTextEdit();
+    typeLabel = new QLabel(tr("&Type:"));
+    typeComboBox = new QComboBox();
+    nextButton = new QPushButton(tr("&Next"));
+    previousButton = new QPushButton(tr("&Previous"));
+
+    nameLabel->setBuddy(nameEdit);
+    addressLabel->setBuddy(addressEdit);
+    typeLabel->setBuddy(typeComboBox);
+//! [Set up widgets]
+
+//! [Set up the mapper]
+    QSqlTableModel *relModel = model->relationModel(typeIndex);
+    typeComboBox->setModel(relModel);
+    typeComboBox->setModelColumn(relModel->fieldIndex("description"));
+
+    mapper = new QDataWidgetMapper(this);
+    mapper->setModel(model);
+    mapper->setItemDelegate(new QSqlRelationalDelegate(this));
+    mapper->addMapping(nameEdit, model->fieldIndex("name"));
+    mapper->addMapping(addressEdit, model->fieldIndex("address"));
+    mapper->addMapping(typeComboBox, typeIndex);
+//! [Set up the mapper]
+
+//! [Set up connections and layouts]
+    connect(previousButton, SIGNAL(clicked()),
+            mapper, SLOT(toPrevious()));
+    connect(nextButton, SIGNAL(clicked()),
+            mapper, SLOT(toNext()));
+    connect(mapper, SIGNAL(currentIndexChanged(int)),
+            this, SLOT(updateButtons(int)));
+
+    QGridLayout *layout = new QGridLayout();
+    layout->addWidget(nameLabel, 0, 0, 1, 1);
+    layout->addWidget(nameEdit, 0, 1, 1, 1);
+    layout->addWidget(previousButton, 0, 2, 1, 1);
+    layout->addWidget(addressLabel, 1, 0, 1, 1);
+    layout->addWidget(addressEdit, 1, 1, 2, 1);
+    layout->addWidget(nextButton, 1, 2, 1, 1);
+    layout->addWidget(typeLabel, 3, 0, 1, 1);
+    layout->addWidget(typeComboBox, 3, 1, 1, 1);
+    setLayout(layout);
+
+    setWindowTitle(tr("SQL Widget Mapper"));
+    mapper->toFirst();
+}
+//! [Set up connections and layouts]
+
+//! [Set up the main table]
+void Window::setupModel()
+{
+    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
+    db.setDatabaseName(":memory:");
+    if (!db.open()) {
+        QMessageBox::critical(0, tr("Cannot open database"),
+            tr("Unable to establish a database connection.\n"
+               "This example needs SQLite support. Please read "
+               "the Qt SQL driver documentation for information how "
+               "to build it."), QMessageBox::Cancel);
+        return;
+    }
+
+    QSqlQuery query;
+    query.exec("create table person (id int primary key, "
+               "name varchar(20), address varchar(200), typeid int)");
+    query.exec("insert into person values(1, 'Alice', "
+               "'<qt>123 Main Street<br/>Market Town</qt>', 101)");
+    query.exec("insert into person values(2, 'Bob', "
+               "'<qt>PO Box 32<br/>Mail Handling Service"
+               "<br/>Service City</qt>', 102)");
+    query.exec("insert into person values(3, 'Carol', "
+               "'<qt>The Lighthouse<br/>Remote Island</qt>', 103)");
+    query.exec("insert into person values(4, 'Donald', "
+               "'<qt>47338 Park Avenue<br/>Big City</qt>', 101)");
+    query.exec("insert into person values(5, 'Emma', "
+               "'<qt>Research Station<br/>Base Camp<br/>"
+               "Big Mountain</qt>', 103)");
+//! [Set up the main table]
+
+//! [Set up the address type table]
+    query.exec("create table addresstype (id int, description varchar(20))");
+    query.exec("insert into addresstype values(101, 'Home')");
+    query.exec("insert into addresstype values(102, 'Work')");
+    query.exec("insert into addresstype values(103, 'Other')");
+
+    model = new QSqlRelationalTableModel(this);
+    model->setTable("person");
+    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
+
+    typeIndex = model->fieldIndex("typeid");
+
+    model->setRelation(typeIndex,
+           QSqlRelation("addresstype", "id", "description"));
+    model->select();
+}
+//! [Set up the address type table]
+
+//! [Slot for updating the buttons]
+void Window::updateButtons(int row)
+{
+    previousButton->setEnabled(row > 0);
+    nextButton->setEnabled(row < model->rowCount() - 1);
+}
+//! [Slot for updating the buttons]