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diff --git a/src/assistant/lib/qhelpengine_p.h b/src/assistant/lib/qhelpengine_p.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 QHELPENGINE_P_H
+#define QHELPENGINE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of the help generator tools. This header file may change from version
+// to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/QMap>
+#include <QtCore/QStringList>
+#include <QtCore/QObject>
+
+QT_BEGIN_NAMESPACE
+
+class QSqlQuery;
+
+class QHelpEngineCore;
+class QHelpDBReader;
+class QHelpContentModel;
+class QHelpContentWidget;
+class QHelpIndexModel;
+class QHelpIndexWidget;
+class QHelpSearchEngine;
+class QHelpCollectionHandler;
+
+class QHelpEngineCorePrivate : public QObject
+{
+    Q_OBJECT
+
+public:
+    QHelpEngineCorePrivate();
+    virtual ~QHelpEngineCorePrivate();
+
+    virtual void init(const QString &collectionFile,
+        QHelpEngineCore *helpEngineCore);
+
+    void clearMaps();
+    bool setup();
+
+    QMap<QString, QHelpDBReader*> readerMap;
+    QMap<QString, QHelpDBReader*> fileNameReaderMap;
+    QMultiMap<QString, QHelpDBReader*> virtualFolderMap;
+    QStringList orderedFileNameList;
+
+    QHelpCollectionHandler *collectionHandler;
+    QString currentFilter;
+    QString error;
+    bool needsSetup;
+    bool autoSaveFilter;
+
+protected:
+    QHelpEngineCore *q;
+
+private slots:
+    void errorReceived(const QString &msg);
+};
+
+
+class QHelpEnginePrivate : public QHelpEngineCorePrivate
+{
+    Q_OBJECT
+
+public:
+    QHelpEnginePrivate();
+    ~QHelpEnginePrivate();
+
+    void init(const QString &collectionFile,
+        QHelpEngineCore *helpEngineCore);
+
+    QHelpContentModel *contentModel;
+    QHelpContentWidget *contentWidget;
+
+    QHelpIndexModel *indexModel;
+    QHelpIndexWidget *indexWidget;
+
+    QHelpSearchEngine *searchEngine;
+
+    void stopDataCollection();
+
+    friend class QHelpContentProvider;
+    friend class QHelpContentModel;
+    friend class QHelpIndexProvider;
+    friend class QHelpIndexModel;
+
+public slots:
+    void setContentsWidgetBusy();
+    void unsetContentsWidgetBusy();
+    void setIndexWidgetBusy();
+    void unsetIndexWidgetBusy();
+
+private slots:
+    void applyCurrentFilter();
+};
+
+QT_END_NAMESPACE
+
+#endif