/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** 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 Digia Plc 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.
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**
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****************************************************************************/

#ifndef MAPWIDGET_H
#define MAPWIDGET_H

#include <qgraphicsgeomap.h>

#include <QTime>
#include <QPen>

class QGraphicsSceneMouseEvent;
class QPinchGesture;

QTM_BEGIN_NAMESPACE

    class QGeoCoordinate;
    class QGeoMappingManager;
    class QGeoMapCircleObject;

QTM_END_NAMESPACE

QTM_USE_NAMESPACE

class GeoMap : public QGraphicsGeoMap
{
    Q_OBJECT
public:
    GeoMap(QGeoMappingManager * manager);
    ~GeoMap();

signals:
    void contextMenu(QGraphicsSceneContextMenuEvent * event, QGeoMapObject * clickedMapObject);

private slots:
    void kineticTimerEvent();

    void hoveredMapObjectDestroyed();

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent * event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent * event);
    void hoverMoveEvent(QGraphicsSceneHoverEvent * event);
    void hoverLeaveEvent(QGraphicsSceneHoverEvent * event);
    void mouseMoveEvent(QGraphicsSceneMouseEvent * event);
    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent * event);
    void keyPressEvent(QKeyEvent * event);
    void keyReleaseEvent(QKeyEvent * event);
    void wheelEvent(QGraphicsSceneWheelEvent * event);
    void contextMenuEvent(QGraphicsSceneContextMenuEvent * event);
    bool sceneEvent(QEvent *event);

private:
    bool panActive;
    bool panDecellerate;

    // Fractional pan, used by panFloatWrapper
    QPointF remainingPan;

    // current kinetic panning speed, in pixel/msec
    QPointF kineticPanSpeed;
    QPoint panDir;
    QTimer * kineticTimer;
    QTime lastMoveTime;

    // An entry in the mouse history. first=speed, second=time
    typedef QPair<QPointF, QTime> MouseHistoryEntry;
    // A history of the last (currently 5) mouse move events is stored in order to smooth out movement detection for kinetic panning
    QList<MouseHistoryEntry> mouseHistory;

    void panFloatWrapper(const QPointF & delta);
    void applyPan(const Qt::KeyboardModifiers & modifiers);

    QGeoMapObject * m_lastHoveredMapObject;
    QPen m_lastHoveredMapObjectPen;

public:
    QGeoMapCircleObject * lastCircle;

private:
    void handlePinchGesture(QPinchGesture * pinchGesture);
};

#endif // MAPWIDGET_H