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diff --git a/examples/widgets/richtext/syntaxhighlighter/mainwindow.cpp b/examples/widgets/richtext/syntaxhighlighter/mainwindow.cpp
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+++ b/examples/widgets/richtext/syntaxhighlighter/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWidgets>
+
+#include "mainwindow.h"
+
+//! [0]
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setupFileMenu();
+    setupHelpMenu();
+    setupEditor();
+
+    setCentralWidget(editor);
+    setWindowTitle(tr("Syntax Highlighter"));
+}
+//! [0]
+
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Syntax Highlighter"),
+                tr("<p>The <b>Syntax Highlighter</b> example shows how " \
+                   "to perform simple syntax highlighting by subclassing " \
+                   "the QSyntaxHighlighter class and describing " \
+                   "highlighting rules using regular expressions.</p>"));
+}
+
+void MainWindow::newFile()
+{
+    editor->clear();
+}
+
+void MainWindow::openFile(const QString &path)
+{
+    QString fileName = path;
+
+    if (fileName.isNull())
+        fileName = QFileDialog::getOpenFileName(this,
+            tr("Open File"), "", "C++ Files (*.cpp *.h)");
+
+    if (!fileName.isEmpty()) {
+        QFile file(fileName);
+        if (file.open(QFile::ReadOnly | QFile::Text))
+            editor->setPlainText(file.readAll());
+    }
+}
+
+//! [1]
+void MainWindow::setupEditor()
+{
+    QFont font;
+    font.setFamily("Courier");
+    font.setFixedPitch(true);
+    font.setPointSize(10);
+
+    editor = new QTextEdit;
+    editor->setFont(font);
+
+    highlighter = new Highlighter(editor->document());
+
+    QFile file("mainwindow.h");
+    if (file.open(QFile::ReadOnly | QFile::Text))
+        editor->setPlainText(file.readAll());
+}
+//! [1]
+
+void MainWindow::setupFileMenu()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"), this);
+    menuBar()->addMenu(fileMenu);
+
+    fileMenu->addAction(tr("&New"), this, SLOT(newFile()),
+                        QKeySequence::New);
+
+    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
+                        QKeySequence::Open);
+                        
+    fileMenu->addAction(tr("E&xit"), qApp, SLOT(quit()),
+                        QKeySequence::Quit);
+}
+
+void MainWindow::setupHelpMenu()
+{
+    QMenu *helpMenu = new QMenu(tr("&Help"), this);
+    menuBar()->addMenu(helpMenu);
+
+    helpMenu->addAction(tr("&About"), this, SLOT(about()));
+    helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));
+}