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diff --git a/examples/pdfwidgets/pdfviewer/mainwindow.cpp b/examples/pdfwidgets/pdfviewer/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtPDF module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+#include "pageselector.h"
+#include "zoomselector.h"
+
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QPdfBookmarkModel>
+#include <QPdfDocument>
+#include <QPdfPageNavigation>
+#include <QtMath>
+
+const qreal zoomMultiplier = qSqrt(2.0);
+
+Q_LOGGING_CATEGORY(lcExample, "qt.examples.pdfviewer")
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+    , ui(new Ui::MainWindow)
+    , m_zoomSelector(new ZoomSelector(this))
+    , m_pageSelector(new PageSelector(this))
+    , m_document(new QPdfDocument(this))
+{
+    ui->setupUi(this);
+
+    m_zoomSelector->setMaximumWidth(150);
+    ui->mainToolBar->insertWidget(ui->actionZoom_In, m_zoomSelector);
+
+    m_pageSelector->setMaximumWidth(150);
+    ui->mainToolBar->addWidget(m_pageSelector);
+
+    m_pageSelector->setPageNavigation(ui->pdfView->pageNavigation());
+
+    connect(m_zoomSelector, &ZoomSelector::zoomModeChanged, ui->pdfView, &QPdfView::setZoomMode);
+    connect(m_zoomSelector, &ZoomSelector::zoomFactorChanged, ui->pdfView, &QPdfView::setZoomFactor);
+    m_zoomSelector->reset();
+
+    QPdfBookmarkModel *bookmarkModel = new QPdfBookmarkModel(this);
+    bookmarkModel->setDocument(m_document);
+
+    ui->bookmarkView->setModel(bookmarkModel);
+    connect(ui->bookmarkView, SIGNAL(activated(QModelIndex)), this, SLOT(bookmarkSelected(QModelIndex)));
+
+    ui->tabWidget->setTabEnabled(1, false); // disable 'Pages' tab for now
+
+    ui->pdfView->setDocument(m_document);
+
+    connect(ui->pdfView, &QPdfView::zoomFactorChanged,
+            m_zoomSelector, &ZoomSelector::setZoomFactor);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}
+
+void MainWindow::open(const QUrl &docLocation)
+{
+    if (docLocation.isLocalFile()) {
+        m_document->load(docLocation.toLocalFile());
+        const auto documentTitle = m_document->metaData(QPdfDocument::Title).toString();
+        setWindowTitle(!documentTitle.isEmpty() ? documentTitle : QStringLiteral("PDF Viewer"));
+    } else {
+        qCDebug(lcExample) << docLocation << "is not a valid local file";
+        QMessageBox::critical(this, tr("Failed to open"), tr("%1 is not a valid local file").arg(docLocation.toString()));
+    }
+    qCDebug(lcExample) << docLocation;
+}
+
+void MainWindow::bookmarkSelected(const QModelIndex &index)
+{
+    if (!index.isValid())
+        return;
+
+    const int page = index.data(QPdfBookmarkModel::PageNumberRole).toInt();
+    ui->pdfView->pageNavigation()->setCurrentPage(page);
+}
+
+void MainWindow::on_actionOpen_triggered()
+{
+    QUrl toOpen = QFileDialog::getOpenFileUrl(this, tr("Choose a PDF"), QUrl(), "Portable Documents (*.pdf)");
+    if (toOpen.isValid())
+        open(toOpen);
+}
+
+void MainWindow::on_actionQuit_triggered()
+{
+    QApplication::quit();
+}
+
+void MainWindow::on_actionAbout_triggered()
+{
+    QMessageBox::about(this, tr("About PdfViewer"),
+        tr("An example using QPdfDocument"));
+}
+
+void MainWindow::on_actionAbout_Qt_triggered()
+{
+    QMessageBox::aboutQt(this);
+}
+
+void MainWindow::on_actionZoom_In_triggered()
+{
+    ui->pdfView->setZoomFactor(ui->pdfView->zoomFactor() * zoomMultiplier);
+}
+
+void MainWindow::on_actionZoom_Out_triggered()
+{
+    ui->pdfView->setZoomFactor(ui->pdfView->zoomFactor() / zoomMultiplier);
+}
+
+void MainWindow::on_actionPrevious_Page_triggered()
+{
+    ui->pdfView->pageNavigation()->goToPreviousPage();
+}
+
+void MainWindow::on_actionNext_Page_triggered()
+{
+    ui->pdfView->pageNavigation()->goToNextPage();
+}
+
+void MainWindow::on_actionContinuous_triggered()
+{
+    ui->pdfView->setPageMode(ui->actionContinuous->isChecked() ? QPdfView::MultiPage : QPdfView::SinglePage);
+}