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diff --git a/src/assistant/tools/assistant/helpviewer.h b/src/assistant/tools/assistant/helpviewer.h
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+++ b/src/assistant/tools/assistant/helpviewer.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef HELPVIEWER_H
+#define HELPVIEWER_H
+
+#include <QtCore/qglobal.h>
+#include <QtCore/QString>
+#include <QtCore/QUrl>
+#include <QtCore/QVariant>
+
+#include <QtGui/QAction>
+#include <QtGui/QFont>
+
+#if defined(QT_NO_WEBKIT)
+#include <QtGui/QTextBrowser>
+#else
+#include <QtWebKit/QWebView>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#if !defined(QT_NO_WEBKIT)
+class HelpViewer : public QWebView
+#else
+class HelpViewer : public QTextBrowser
+#endif
+{
+    Q_OBJECT
+    class HelpViewerPrivate;
+    Q_DISABLE_COPY(HelpViewer)
+
+public:
+    enum FindFlag {
+        FindBackward = 0x01,
+        FindCaseSensitively = 0x02
+    };
+    Q_DECLARE_FLAGS(FindFlags, FindFlag)
+
+    HelpViewer(qreal zoom, QWidget *parent = 0);
+    ~HelpViewer();
+
+    QFont viewerFont() const;
+    void setViewerFont(const QFont &font);
+
+    void scaleUp();
+    void scaleDown();
+
+    void resetScale();
+    qreal scale() const;
+
+    QString title() const;
+    void setTitle(const QString &title);
+
+    QUrl source() const;
+    void setSource(const QUrl &url);
+
+    QString selectedText() const;
+    bool isForwardAvailable() const;
+    bool isBackwardAvailable() const;
+
+    bool findText(const QString &text, FindFlags flags, bool incremental,
+        bool fromSearch);
+
+    static const QString DocPath;
+    static const QString AboutBlank;
+    static const QString LocalHelpFile;
+    static const QString PageNotFoundMessage;
+
+    static bool isLocalUrl(const QUrl &url);
+    static bool canOpenPage(const QString &url);
+    static QString mimeFromUrl(const QUrl &url);
+    static bool launchWithExternalApp(const QUrl &url);
+
+public slots:
+    void copy();
+    void home();
+
+    void forward();
+    void backward();
+
+signals:
+    void titleChanged();
+#if !defined(QT_NO_WEBKIT)
+    void copyAvailable(bool yes);
+    void sourceChanged(const QUrl &url);
+    void forwardAvailable(bool enabled);
+    void backwardAvailable(bool enabled);
+    void highlighted(const QString &link);
+    void printRequested();
+#else
+    void loadStarted();
+    void loadFinished(bool finished);
+#endif
+
+protected:
+    void keyPressEvent(QKeyEvent *e);
+    void wheelEvent(QWheelEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+
+private slots:
+    void actionChanged();
+    void setLoadStarted();
+    void setLoadFinished(bool ok);
+
+private:
+    bool eventFilter(QObject *obj, QEvent *event);
+    void contextMenuEvent(QContextMenuEvent *event);
+    QVariant loadResource(int type, const QUrl &name);
+    bool handleForwardBackwardMouseButtons(QMouseEvent *e);
+
+private:
+    HelpViewerPrivate *d;
+};
+
+QT_END_NAMESPACE
+Q_DECLARE_METATYPE(HelpViewer*)
+
+#endif  // HELPVIEWER_H