/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not,

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*

*/

#ifndef LINEARFLOWSNIPPET_H

#define LINEARFLOWSNIPPET_H

#include <QTime>

#include <QImage>

#include <QWidget>

#include <QGraphicsWidget>

#include <QGraphicsItem>

#include "ChromeItem.h"

class DragPoint

    {

    public:

        QPoint iPoint;

        QTime  iTime;

    };

namespace GVA {

class Filmstrip;

class FilmstripFlowPrivate;

class FilmstripMovieFactory;

/*!

  Class GraphicsFilmstripFlow

 */

class LinearFlowSnippet: public ChromeItem

{

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();

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