// Copyright (c) 2008  GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you may redistribute it under
// the terms of the Q Public License version 1.0.
// See the file LICENSE.QPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
//                 Laurent Rineau <Laurent.Rineau@geometryfactory.com>

#ifndef CGAL_QT_CIRCULAR_ARC_GRAPHICS_ITEM_H
#define CGAL_QT_CIRCULAR_ARC_GRAPHICS_ITEM_H

#include <CGAL/Bbox_2.h>
#include <CGAL/Qt/PainterOstream.h>
#include <CGAL/Qt/GraphicsItem.h>
#include <CGAL/Qt/Converter.h>

#include <QGraphicsScene>
#include <QPainter>
#include <QStyleOption>

namespace CGAL {
namespace Qt {

template <typename CK>
class CircularArcGraphicsItem : public GraphicsItem
{
  typedef typename CK::Point_2 Point_2;
  typedef typename CK::Circle_2 Circle_2;
  typedef typename CK::Circular_arc_2 Circular_arc_2;

public:
  CircularArcGraphicsItem();

  void modelChanged();

public:
  QRectF boundingRect() const;
  
  void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
  

  const QPen& verticesPen() const
  {
    return vertices_pen;
  }

  const QPen& edgesPen() const
  {
    return edges_pen;
  }

  void setVerticesPen(const QPen& pen)
  {
    vertices_pen = pen;
  }

  void setEdgesPen(const QPen& pen)
  {
    edges_pen = pen;
  }
  
  void setArc(const Circular_arc_2& a);

protected:
  void updateBoundingBox();

  QPainter* m_painter;
  PainterOstream<CK> painterostream;

  QRectF bounding_rect;

  QPen edges_pen;

  Circular_arc_2 arc;
};


template <typename CK>
void 
CircularArcGraphicsItem<CK>::setArc(const Circular_arc_2& a)
{
  arc = a;
  updateBoundingBox();
  update();
}

template <typename CK>
CircularArcGraphicsItem<CK>::CircularArcGraphicsItem()
  : painterostream(0)
{
  this->hide();
  setZValue(3);
}

template <typename CK>
QRectF 
CircularArcGraphicsItem<CK>::boundingRect() const
{
  return QRectF(-500,-500,1000,1000); 
  Converter<CK> convert;
  return convert(arc.bbox());
}




template <typename CK>
void 
CircularArcGraphicsItem<CK>::paint(QPainter *painter, 
                                    const QStyleOptionGraphicsItem *option,
                                    QWidget * widget)
{
  std::cout << "CircularArcGraphicsItem<CK>::paint" << std::endl;
  painter->setPen(this->edgesPen());
  painterostream = PainterOstream<CK>(painter);
  
  painterostream << arc;
}

// We let the bounding box only grow, so that when vertices get removed
// the maximal bbox gets refreshed in the GraphicsView
template <typename CK>
void 
CircularArcGraphicsItem<CK>::updateBoundingBox()
{
  Converter<CK> convert;
  prepareGeometryChange();
  bounding_rect = convert(arc.bbox());
}


template <typename CK>
void 
CircularArcGraphicsItem<CK>::modelChanged()
{
  updateBoundingBox();
  update();
}


} // namespace Qt
} // namespace CGAL

#endif // CGAL_QT_CIRCULAR_ARC_GRAPHICS_ITEM_H