/usr/include/CGAL/Qt/SegmentsGraphicsItem.h is in libcgal-qt4-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
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// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
// 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 3 of the License, or (at your option) any later version.
//
// 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_SEGMENTS_GRAPHICS_ITEM_H
#define CGAL_QT_SEGMENTS_GRAPHICS_ITEM_H
#include <CGAL/Bbox_2.h>
#include <CGAL/bounding_box.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 P>
class SegmentsGraphicsItem : public GraphicsItem
{
typedef typename P::value_type Segment_2;
typedef typename CGAL::Kernel_traits<Segment_2>::Kernel Traits;
public:
SegmentsGraphicsItem(P* p_);
void modelChanged();
public:
QRectF boundingRect() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
const QPen& verticesPen() const
{
return vertices_pen;
}
void setVerticesPen(const QPen& pen)
{
vertices_pen = pen;
}
bool drawVertices() const
{
return draw_vertices;
}
void setDrawVertices(const bool b)
{
draw_vertices = b;
update();
}
protected:
void updateBoundingBox();
P * segments;
QPainter* m_painter;
PainterOstream<Traits> painterostream;
QRectF bounding_rect;
QPen vertices_pen;
bool draw_edges;
bool draw_vertices;
};
template <typename P>
SegmentsGraphicsItem<P>::SegmentsGraphicsItem(P * p_)
: segments(p_), painterostream(0),
draw_edges(true), draw_vertices(true)
{
setVerticesPen(QPen(::Qt::red, 3.));
updateBoundingBox();
setZValue(3);
}
template <typename P>
QRectF
SegmentsGraphicsItem<P>::boundingRect() const
{
return bounding_rect;
}
template <typename P>
void
SegmentsGraphicsItem<P>::paint(QPainter *painter,
const QStyleOptionGraphicsItem * /*option*/,
QWidget * /*widget*/)
{
painterostream = PainterOstream<Traits>(painter);
for(typename P::iterator it = segments->begin();
it != segments->end();
it++){
painterostream << *it;
}
}
// We let the bounding box only grow, so that when vertices get removed
// the maximal bbox gets refreshed in the GraphicsView
template <typename P>
void
SegmentsGraphicsItem<P>::updateBoundingBox()
{
Converter<Traits> convert;
prepareGeometryChange();
if(segments->size() == 0){
return;
}
Bbox_2 bb = segments->begin()->bbox();
for(typename P::iterator it = segments->begin();
it != segments->end();
++it){
bb = bb + it->bbox();
}
bounding_rect = convert(bb);
}
template <typename P>
void
SegmentsGraphicsItem<P>::modelChanged()
{
updateBoundingBox();
update();
}
} // namespace Qt
} // namespace CGAL
#endif // CGAL_QT_SEGMENTS_GRAPHICS_ITEM_H
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