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+/****************************************************************************
+**
+** This file is a part of QtChickenWranglers.
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).*
+** All rights reserved.
+** Contact:  Nokia Corporation (qt-info@nokia.com)
+**
+** 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."
+**
+****************************************************************************/
+
+
+#ifndef SENSORMOVEMENT_H
+#define SENSORMOVEMENT_H
+
+#include "global.h"
+
+#include <QtCore/QObject>
+#include <QtCore/QTimer>
+#include <QAccelerometer>
+
+QTM_USE_NAMESPACE
+
+class SensorMovement : public QObject, public QAccelerometerFilter
+{
+    Q_OBJECT
+
+public:
+    SensorMovement(QObject *parent = 0);
+
+    Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
+    Q_PROPERTY(qreal minimumRotation READ minimumRotation WRITE setMinimumRotation NOTIFY minimumRotationChanged)
+    Q_PROPERTY(qreal threshold READ threshold WRITE setThreshold NOTIFY thresholdChanged)
+    Q_PROPERTY(int directionTimeout READ directionTimeout WRITE setDirectionTimeout NOTIFY directionTimeoutChanged)
+
+    /**
+     * Defines if sensor is \a enabled, if it will forward direction change signals.
+     */
+    bool isEnabled() const { return m_enabled; }
+    void setEnabled(bool enabled);
+
+    /**
+     * Defines a minimum absolute rotation value required to
+     * detect a direction change in a axis. Note that DirectionStop
+     * is also considered a direction.
+     */
+    qreal minimumRotation() const { return m_minimumRotation; }
+    void setMinimumRotation(qreal minimumRotation);
+
+    /**
+     * Defines an angle interval as [-threshold, threshold], where the device
+     * rotation is not considered to be at any direction.
+     *
+     * For instance, if threshold was set to 5 and device is moving along
+     * vertical axis, it will not notify any direction change when the the
+     * rotation sensor value for that axis is between -5 and 5.
+     */
+    qreal threshold() const { return m_threshold; }
+    void setThreshold(qreal threshold);
+
+    /**
+     * Defines a time required for the device to stand in a given direction,
+     * before actually notifying a direction change.
+     *
+     * When devices is moved to a direction A and changed to a direction B in
+     * less than \a timeout miliseconds, it won't emit directionChange signal
+     * for direction A.
+     */
+    int directionTimeout() const { return m_directionTimeout; }
+    void setDirectionTimeout(int directionTimeout);
+
+    Global::Direction direction() const { return m_direction; }
+
+public slots:
+    /**
+     * Resets the device's start position.
+     *
+     * When this method is called, the current device position is read
+     * from sensor and all the direction calculations will be based on
+     * these offsets for both axis (x = 0 + m_startX, y = 0 + m_startY).
+     */
+    void resetStartPosition();
+
+signals:
+    void directionChanged(Global::Direction direction);
+    void minimumRotationChanged();
+    void thresholdChanged();
+    void directionTimeoutChanged();
+    void enabledChanged();
+
+protected:
+    bool filter(QAccelerometerReading *reading);
+
+private slots:
+    void notifyDirectionChanged();
+
+private:
+    Global::Direction calculateDirection(qreal x, qreal y);
+    Global::Direction calculateDirectionMaemo5(qreal x, qreal y);
+
+    QAccelerometer m_sensor;
+
+    Global::Direction m_direction;
+
+    qreal m_startX;
+    qreal m_startY;
+    qreal m_actualX;
+    qreal m_actualY;
+
+    qreal m_minimumRotation;
+    qreal m_threshold;
+    int m_directionTimeout;
+    bool m_enabled;
+
+    QTimer timer;
+};
+
+#endif