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diff --git a/tradeshow/knx-demo/3d-Alexa-knx-demo/housemodel.h b/tradeshow/knx-demo/3d-Alexa-knx-demo/housemodel.h
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt 3D Studio Demos.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, 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 The Qt Company Ltd 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef HOUSEMODEL_H
+#define HOUSEMODEL_H
+
+#include <QAbstractListModel>
+#include <QUrl>
+#include <QRect>
+
+class Room
+{
+public:
+    Room(const QString &name, const QString &item,
+         int temperature, double light, int x, int y)
+    : m_name(name)
+    , m_item(item)
+    , m_temperature(temperature)
+    , m_light(light)
+    , m_xPos(x)
+    , m_yPos(y) {}
+
+    QString getName() const { return m_name; }
+    QString getItem() const { return m_item; }
+    int getTemperature() const { return m_temperature; }
+    int getXPos() const { return m_xPos; }
+    int getYPos() const { return m_yPos; }
+    void setTemperature(int temperature) { m_temperature = temperature; }
+    double getLight() const { return m_light; }
+    void setLight(double light) { m_light = light; }
+    void setXPos(int x) { m_xPos = x; }
+    void setYPos(int y) { m_xPos = y; }
+
+private:
+    QString m_name;
+    QString m_item;
+    int m_temperature;
+    double m_light;
+    int m_xPos;
+    int m_yPos;
+};
+
+class HouseModel : public QAbstractListModel
+{
+    Q_OBJECT
+public:
+    enum RoomRoles {
+        NameRole = 0,
+        ItemRole,
+        TemperatureRole,
+        LightRole,
+        XPosRole,
+        YPosRole
+    };
+
+    HouseModel(QObject *parent = 0);
+    virtual QHash<int, QByteArray> roleNames() const;
+    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
+    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+    virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
+    virtual bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
+    void addRoom(const QString &name, const QString &item,
+                 int temperature, double light, int xPos, int yPos);
+
+private:
+    void generateRooms();
+
+    QList<Room> m_rooms;
+};
+
+#endif // HOUSEMODEL_H