/***************************************************************************
 *   Copyright (C) 2008 by Marco Gittler (g.marco@freenet.de)              *
 *   Copyright (C) 2008 by Jean-Baptiste Mardelle (jb@kdenlive.org)        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

#ifndef ABSTRACTGROUPITEM
#define ABSTRACTGROUPITEM

#include "definitions.h"

#include <QGraphicsItemGroup>
#include <QGraphicsSceneMouseEvent>

class CustomTrackScene;
class AbstractClipItem;
class QGraphicsSceneMouseEvent;

class AbstractGroupItem : public QObject , public QGraphicsItemGroup
{
    Q_OBJECT
public:
    explicit AbstractGroupItem(double fps);
    virtual int type() const;
    CustomTrackScene* projectScene();
    void addItem(QGraphicsItem * item);
    void removeItem(QGraphicsItem * item);
    int track() const;
    QPainterPath clipGroupShape(const QPointF &offset) const;
    QPainterPath clipGroupSpacerShape(const QPointF &offset) const;
    QPainterPath transitionGroupShape(const QPointF &offset) const;
    void setItemLocked(bool locked);
    bool isItemLocked() const;
    QList <AbstractClipItem *> childClips() const;
    //    ItemInfo info() const;

    /** @brief Resizes all clips in this group from start.
    *@param diff Difference to startPos stored in m_resizeInfos */
    void resizeStart(int diff);
    /** @brief Resizes all clips in this group from end.
    * @param diff Difference to endPos stored in m_resizeInfos */
    void resizeEnd(int diff);

    /** @brief Gets the duration (length) of the group. */
    GenTime duration() const;
    /** @brief Gets the start frame of the group. */
    GenTime startPos() const;
    QGraphicsItem *otherClip(QGraphicsItem *item);

protected:
    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
    virtual void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
    virtual void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
    virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent *event);
    virtual void dropEvent(QGraphicsSceneDragDropEvent *event);
    virtual void mousePressEvent(QGraphicsSceneMouseEvent * event);
    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent * event);
    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent * event);
    int trackForPos(int position);
    int posForTrack(int track);

private:
    QPainterPath groupShape(GraphicsRectItem type, const QPointF &offset) const;
    QPainterPath spacerGroupShape(GraphicsRectItem type, const QPointF &offset) const;
};

#endif
