// Copyright (c) 2008  GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/GraphicsView/demo/Periodic_2_triangulation_2/include/CGAL/Qt/PeriodicVoronoiGraphicsItem.h $
// $Id: demo/Periodic_2_triangulation_2/include/CGAL/Qt/PeriodicVoronoiGraphicsItem.h b26b07a1242 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s)     : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
//                 Laurent Rineau <Laurent.Rineau@geometryfactory.com>
//                 Nico Kruithof <Nico@nghk.nl>

#ifndef CGAL_QT_PERIODIC_VORONOI_GRAPHICS_ITEM_H
#define CGAL_QT_PERIODIC_VORONOI_GRAPHICS_ITEM_H



#include <CGAL/Qt/GraphicsItem.h>
#include <CGAL/Qt/PainterOstream.h>
#include <CGAL/Qt/utility.h>

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

#include <CGAL/intersection_2.h>

class QGraphicsSceneMouseEvent;


namespace CGAL {
namespace Qt {

template <typename DT>
class PeriodicTriangulationVoronoiGraphicsItem : public GraphicsItem
{
public:
  PeriodicTriangulationVoronoiGraphicsItem(DT  * dt_);


  QRectF
  boundingRect() const;

  void
  paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

  void
  modelChanged();

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

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

private:
  DT * dt;
  QPen edges_pen;
};



template <typename DT>
PeriodicTriangulationVoronoiGraphicsItem<DT>::PeriodicTriangulationVoronoiGraphicsItem(DT * dt_)
  :  dt(dt_)
{
  setZValue(3);
}

template <typename DT>
QRectF
PeriodicTriangulationVoronoiGraphicsItem<DT>::boundingRect() const
{
  QRectF rect = CGAL::Qt::viewportsBbox(scene());
  return rect;
}


template <typename DT>
void
PeriodicTriangulationVoronoiGraphicsItem<DT>::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget * /*w*/)
{
  QRectF rect = option->exposedRect;
  PainterOstream<typename DT::Geom_traits> pos(painter, rect);

  painter->setPen(edgesPen());
  dt->draw_dual(pos);
}


template <typename T>
void
PeriodicTriangulationVoronoiGraphicsItem<T>::modelChanged()
{
  update();
}

} // namespace Qt
} // namespace CGAL

#endif // CGAL_QT_PERIODIC_VORONOI_GRAPHICS_ITEM_H
