/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/


#ifndef LINEARFLOWSNIPPET_H
#define LINEARFLOWSNIPPET_H

#include <QTime>
#include <QImage>
#include <QWidget>
#include <QGraphicsWidget>
#include <QGraphicsItem>

class DragPoint
    {
    public:
        QPoint iPoint;
        QTime  iTime;
    };

namespace GVA {

class Filmstrip;
class FilmstripFlowPrivate;
class FilmstripMovieFactory;

/*!
  Class GraphicsFilmstripFlow
 */ 
class LinearFlowSnippet: public QGraphicsWidget
{
Q_OBJECT
friend class Filmstrip;
friend class FilmstripMovieFactory;

public:
    /*!
    Creates a new FilmstripFlow widget.
    */  
    LinearFlowSnippet(QGraphicsWidget* parent = 0);

    /*!
    Destroys the widget.
    */
    ~LinearFlowSnippet();

    /*!
    init the FilmstripFlow
    */
    void init(QString displayMode, QString titleName);

    //! Clear all slides
    void clear();
    
    //! Add a slide to the flow
    void addSlide(const QImage& image);

    //! Add a slide to the flow with title
    void addSlide(const QImage& image, const QString& title);

    //! Set the center of the flow
    void setCenterIndex(int i);

    //! Show the previous item 
    void showPrevious();

    //! Show the next item
    void showNext();

    //! Returns the total number of slides.
    int slideCount() const;

    //! Returns QImage of specified slide.
    QImage slide(int) const;

    //! Return the index of the current center slide
    int centerIndex() const;

    //! return true if slide animation is ongoing
    bool slideAnimationOngoing() const;

    //! return center slide's rect
    QRect centralRect() const;

    //! show the ith slide
    void showSlide(int) {}

    //! inserts filmstrip at index position i. 
    void insert(int i, const QImage& image, const QString& title);

    //! removes filmstrip at index position i.
    void removeAt (int i);

    //! set background color
    void backgroundColor(const QRgb& c);

    //! handle the display mode change
    void displayModeChanged(QString& newMode);

    //! prepare start-animation
    void prepareStartAnimation();

    //! run start-animation
    void runStartAnimation();
    
    //! run end-animation
    void runEndAnimation();

    bool isFlick();
    
    QPoint speed();
    
    QPoint currentPos();
    
    QPoint previousPos();
    
    qreal dragTime() const;

    void startFlickScroll();

signals:
    void removed(int index);
    void endAnimationCplt();
    void centerIndexChanged(int index);
    void ok(int index);
    void cancel();
    void mouseEvent(QEvent::Type type);
protected:
    void paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0); 
    void resizeEvent(QGraphicsSceneResizeEvent* event); 
    void moveEvent(QGraphicsSceneMoveEvent* event);
    void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
    void mousePressEvent(QGraphicsSceneMouseEvent* event);
    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);

private slots:
    void stopMovie();
    void playMovie(int frame);
    void closeAnimation();
    
private:
    void scroll();
    void adjustFilmstripSize(QSize& s);
    void showInsertOnRight();
    void showInsertOnLeft();
    bool hitCloseIcon();

private:
    FilmstripFlowPrivate* d;
    QList<DragPoint> m_dragPoints;
    QTime m_lastMoveEventTime;
    bool m_scrolled;
    QString m_displayMode;
    int m_countFlicks;
    QTimer *m_flickTimer;
    QString m_titleName;
};

}
#endif // LINEARFLOWSNIPPET_H