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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDECLARATIVEGEOMAPFLICKABLE_H
#define QDECLARATIVEGEOMAPFLICKABLE_H


#include <QtDeclarative/qdeclarative.h>
#include <QtGui/qevent.h>
#include <QElapsedTimer>
#include <QVector>
#include <QObject>
#include <QDebug>

QT_BEGIN_NAMESPACE

class QGraphicsSceneMouseEvent;
class QPropertyAnimation;
class QGeoCameraData;
class QGeoMap;

class QDeclarativeGeoMapFlickable: public QObject
{
    Q_OBJECT
    Q_PROPERTY(qreal deceleration READ deceleration WRITE setDeceleration NOTIFY decelerationChanged)
    Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged())

public:
    QDeclarativeGeoMapFlickable(QObject *parent = 0);
    ~QDeclarativeGeoMapFlickable();

    qreal deceleration() const;
    void setDeceleration(qreal deceleration);

    bool enabled() const;
    void setEnabled(bool enabled);

    void setMap(QGeoMap* map);

    bool mousePressEvent(QMouseEvent *event);
    bool mouseMoveEvent(QMouseEvent *event);
    bool mouseReleaseEvent(QMouseEvent *event);
    virtual void timerEvent(QTimerEvent *event);

signals:
    void decelerationChanged();
    void enabledChanged();
    // public (documented) signals:
    void movementStarted();
    void movementEnded();
    void flickStarted();
    void flickEnded();

private:
    void addVelocitySample(QVector<qreal>& buffer, qreal sample);
    void updateVelocity(QVector<qreal>& buffer, qreal& velocity);
    void updateCamera(int dx, int dy, int timeMs = 0);
    void stop();

private slots:
    void flickAnimationFinished();
    //void flickAnimationValueChanged(const QVariant&);

private:
    bool pressed_;
    qreal maxVelocity_;
    qreal deceleration_;
    QElapsedTimer lastPosTime_;
    QElapsedTimer pressTime_;
    QElapsedTimer velocityTime_;
    QVector<qreal> velocityBufferX_;
    qreal velocityX_;
    QVector<qreal> velocityBufferY_;
    qreal velocityY_;
    QPointF lastPos_;
    QPointF pressPos_;
    bool flicking_;
    QGeoMap* map_;
    QPropertyAnimation* animation_;
    bool enabled_;
    bool moving_;
};

QT_END_NAMESPACE
QML_DECLARE_TYPE(QDeclarativeGeoMapFlickable);

#endif