mirror of https://github.com/CGAL/cgal
170 lines
3.5 KiB
C++
170 lines
3.5 KiB
C++
// Copyright (c) 2008 GeometryFactory Sarl (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you may redistribute it under
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// the terms of the Q Public License version 1.0.
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// See the file LICENSE.QPL distributed with CGAL.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
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// Laurent Rineau <Laurent.Rineau@geometryfactory.com>
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#ifndef CGAL_QT_SEGMENTS_GRAPHICS_ITEM_H
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#define CGAL_QT_SEGMENTS_GRAPHICS_ITEM_H
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#include <CGAL/Bbox_2.h>
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#include <CGAL/bounding_box.h>
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#include <CGAL/Qt/PainterOstream.h>
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#include <CGAL/Qt/GraphicsItem.h>
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#include <CGAL/Qt/Converter.h>
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#include <QGraphicsScene>
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#include <QPainter>
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#include <QStyleOption>
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namespace CGAL {
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namespace Qt {
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template <typename P>
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class SegmentsGraphicsItem : public GraphicsItem
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{
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typedef typename P::value_type Segment_2;
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typedef typename CGAL::Kernel_traits<Segment_2>::Kernel Traits;
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public:
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SegmentsGraphicsItem(P* p_);
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void modelChanged();
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public:
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QRectF boundingRect() const;
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
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const QPen& verticesPen() const
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{
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return vertices_pen;
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}
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void setVerticesPen(const QPen& pen)
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{
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vertices_pen = pen;
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}
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bool drawVertices() const
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{
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return draw_vertices;
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}
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void setDrawVertices(const bool b)
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{
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draw_vertices = b;
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update();
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}
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protected:
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void updateBoundingBox();
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P * segments;
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QPainter* m_painter;
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PainterOstream<Traits> painterostream;
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QRectF bounding_rect;
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QPen vertices_pen;
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bool draw_edges;
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bool draw_vertices;
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};
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template <typename P>
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SegmentsGraphicsItem<P>::SegmentsGraphicsItem(P * p_)
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: segments(p_), painterostream(0),
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draw_edges(true), draw_vertices(true)
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{
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setVerticesPen(QPen(::Qt::red, 3.));
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if(segments->size() == 0){
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this->hide();
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}
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updateBoundingBox();
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setZValue(3);
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}
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template <typename P>
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QRectF
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SegmentsGraphicsItem<P>::boundingRect() const
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{
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return bounding_rect;
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}
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template <typename P>
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void
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SegmentsGraphicsItem<P>::paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option,
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QWidget * widget)
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{
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painterostream = PainterOstream<Traits>(painter);
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for(typename P::iterator it = segments->begin();
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it != segments->end();
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it++){
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painterostream << *it;
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}
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}
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// We let the bounding box only grow, so that when vertices get removed
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// the maximal bbox gets refreshed in the GraphicsView
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template <typename P>
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void
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SegmentsGraphicsItem<P>::updateBoundingBox()
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{
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Converter<Traits> convert;
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prepareGeometryChange();
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if(segments->size() == 0){
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return;
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}
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Bbox_2 bb = segments->begin()->bbox();
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for(P::iterator it = segments->begin();
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it != segments->end();
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++it){
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bb = bb + it->bbox();
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}
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bounding_rect = convert(bb);
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}
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template <typename P>
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void
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SegmentsGraphicsItem<P>::modelChanged()
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{
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if((segments->size() == 0) ){
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this->hide();
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} else if((segments->size() > 0) && (! this->isVisible())){
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this->show();
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}
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updateBoundingBox();
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update();
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}
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} // namespace Qt
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} // namespace CGAL
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#endif // CGAL_QT_SEGMENTS_GRAPHICS_ITEM_H
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