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diff --git a/src/charts/piechart/qpiemodelmapper_p.h b/src/charts/piechart/qpiemodelmapper_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt Enterprise Chart API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef QPIEMODELMAPPER_P_H
+#define QPIEMODELMAPPER_P_H
+
+#include <QObject>
+#include <qpiemodelmapper.h>
+
+class QModelIndex;
+
+QT_CHARTS_BEGIN_NAMESPACE
+
+class QPieSlice;
+
+class QPieModelMapperPrivate : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit QPieModelMapperPrivate(QPieModelMapper *q);
+
+public Q_SLOTS:
+    // for the model
+    void modelUpdated(QModelIndex topLeft, QModelIndex bottomRight);
+    void modelRowsAdded(QModelIndex parent, int start, int end);
+    void modelRowsRemoved(QModelIndex parent, int start, int end);
+    void modelColumnsAdded(QModelIndex parent, int start, int end);
+    void modelColumnsRemoved(QModelIndex parent, int start, int end);
+    void handleModelDestroyed();
+
+    // for the series
+    void slicesAdded(QList<QPieSlice *> slices);
+    void slicesRemoved(QList<QPieSlice *> slices);
+    void sliceLabelChanged();
+    void sliceValueChanged();
+    void handleSeriesDestroyed();
+
+    void initializePieFromModel();
+
+private:
+    QPieSlice *pieSlice(QModelIndex index) const;
+    bool isLabelIndex(QModelIndex index) const;
+    bool isValueIndex(QModelIndex index) const;
+    QModelIndex valueModelIndex(int slicePos);
+    QModelIndex labelModelIndex(int slicePos);
+    void insertData(int start, int end);
+    void removeData(int start, int end);
+
+    void blockModelSignals(bool block = true);
+    void blockSeriesSignals(bool block = true);
+
+private:
+    QPieSeries *m_series;
+    QList<QPieSlice *> m_slices;
+    QAbstractItemModel *m_model;
+    int m_first;
+    int m_count;
+    Qt::Orientation m_orientation;
+    int m_valuesSection;
+    int m_labelsSection;
+    bool m_seriesSignalsBlock;
+    bool m_modelSignalsBlock;
+
+private:
+
+    QPieModelMapper *q_ptr;
+    Q_DECLARE_PUBLIC(QPieModelMapper)
+};
+
+QT_CHARTS_END_NAMESPACE
+
+#endif // QPIEMODELMAPPER_P_H