/* This file is part of Rocs,
   Copyright (C) 2008 by:
   Tomaz Canabrava <tomaz.canabrava@gmail.com>
   Ugo Sangiori <ugorox@gmail.com>

   Rocs 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.

   Rocs 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 Step; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef NODEITEM_H
#define NODEITEM_H

#include <QGraphicsItem>
#include <QColor>

class Node;
class QTimeLine;
class QGraphicsSimpleTextItem;


/*! \brief the node drawing on screen.
  long explanation here...
*/
class NodeItem : public QObject, public QGraphicsItem {
    Q_OBJECT
#if QT_VERSION >= 0x040600
    Q_INTERFACES(QGraphicsItem)
#endif	    
public:

    /*! default constructor
    \param node the  Node that this item will interact to.
    \param parent the QGraphicsITem that this Item belongs to. */
    explicit NodeItem( Node *node, QGraphicsItem *parent = 0, bool fade = true);
    virtual ~NodeItem();

    /*! The type of the item */
    enum { Type = UserType + 1 };

    /*! gets the type of the item
      \return the type of the item
    */
    int type() const {
        return Type;
    }

    /*! calculates the boundingRect of this item
      \return the calculated boudingRect.
    */
    QRectF boundingRect() const ;

    /*! calculates the shape of the node
      \return the calculated shape.
    */
    QPainterPath shape() const;

    /*! paint the node onscreen
      \param painter the active painter.
      \param option the QStyleOptionGraphicsItem flags
      \param widget the widget that will be affected.*/
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

    Node* node() {
        return _node;
    }

    void startUpSizing();
    void endUpSizing();
    void startDownSizing();
    void endDownSizing();
protected slots:
    void removeFromScene();
    /*! Emmited when a node is removed */
    void remove();

public slots:
    void updatePos();
    void updateAttributes();
    void addOpacity();
    void removeOpacity();
    void deleteItem();

private:
    Node *_node;
    qreal _opacity;
    bool _removingBeginFlag;
    QTimeLine *_timeLine;
    QColor _color;

    bool _isDownSizing;
    bool _isUpSizing;

    QGraphicsSimpleTextItem *_name;
    QGraphicsSimpleTextItem *_value;
    QGraphicsRectItem	*_boundingRect;
    qreal _oldWidth;
    void setupTextAttributes();

    void eraseNode(QPainter *p);
    void drawNode(QPainter *p);
    void drawEnd(QPainter *p);
    void drawSelectRectangle(QPainter *p);
    void drawBeginArrow(QPainter *p);

};

#endif