mirror of https://github.com/CGAL/cgal
Qt4 based demo for Segment Delaunay Graph
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Andreas Fabri
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// 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) : Laurent Rineau <Laurent.Rineau@geometryfactory.com>
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#ifndef CGAL_QT_SEGMENT_DELAUNAY_GRAPH_GRAPHICS_ITEM_H
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#define CGAL_QT_SEGMENT_DELAUNAY_GRAPH_GRAPHICS_ITEM_H
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#include <CGAL/Bbox_2.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 T>
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class SegmentDelaunayGraphGraphicsItem : public GraphicsItem
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{
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typedef typename T::Geom_traits Geom_traits;
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typedef typename T::Point_2 Point_2;
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typedef typename Kernel_traits<Point_2> ::Kernel Kern;
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T* t;
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QPainter* m_painter;
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PainterOstream<Kern> painterostream;
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QPen vertices_pen, segment_pen, voronoi_pen ;
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Bbox_2 bb;
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bool bb_initialized;
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public:
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SegmentDelaunayGraphGraphicsItem(T * t_)
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: t(t_), painterostream(0),
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segment_pen(::Qt::blue),
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voronoi_pen(::Qt::blue)
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{
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}
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void updateBoundingBox();
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void modelChanged();
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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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const QPen& segmentPen() const
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{
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return segment_pen;
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}
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void setSegmentPen(const QPen& pen)
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{
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segment_pen = pen;
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}
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const QPen& voronoiPen() const
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{
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return voronoi_pen;
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}
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void setVoronoiPen(const QPen& pen)
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{
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voronoi_pen = pen;
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}
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protected:
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void drawAll(QPainter *painter, const QStyleOptionGraphicsItem *option);
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void drawDualEdge(QPainter *painter, typename T::Edge e);
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};
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::drawDualEdge(QPainter *painter, typename T::Edge e)
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{
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CGAL_precondition( ! t->is_infinite(e) );
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typename Geom_traits::Line_2 l;
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typename Geom_traits::Segment_2 s;
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typename Geom_traits::Ray_2 r;
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CGAL::Parabola_segment_2<Geom_traits> ps;
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Object o = t->primal(e);
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if (CGAL::assign(l, o)) { /* m_painter->setPen(::Qt::cyan); std::cerr << "line " << std::endl; */ painterostream << l; }
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else if (CGAL::assign(s, o)) { /* m_painter->setPen(::Qt::magenta); std::cerr << "segment " << std::endl; */ painterostream << s;}
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else if (CGAL::assign(r, o)) { /* m_painter->setPen(::Qt::darkMagenta); std::cerr << "ray " << r << std::endl; */ painterostream << r; }
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else if (CGAL::assign(ps, o)) { /* std::cerr << "ps " << std::endl; */ painterostream << ps;}
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else { std::cerr << "unknown" << std::endl; }
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/* m_painter->setPen(::Qt::black); */
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}
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::drawAll(QPainter *painter, const QStyleOptionGraphicsItem *option)
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{
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QRectF rect = option->exposedRect;
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m_painter = painter;
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painterostream = PainterOstream<Kern>(m_painter, rect);
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m_painter->setPen(this->voronoiPen());
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typename T::Finite_edges_iterator eit = t->finite_edges_begin();
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for (; eit != t->finite_edges_end(); ++eit) {
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drawDualEdge(m_painter, *eit);
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}
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{
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m_painter->setPen(this->segmentPen());
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typename T::Finite_vertices_iterator vit;
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for (vit = t->finite_vertices_begin();
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vit != t->finite_vertices_end(); ++vit) {
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typename T::Site_2 s = vit->site();
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if ( s.is_segment() ) {
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painterostream << s.segment();
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}
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}
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}
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{
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m_painter->setPen(this->verticesPen());
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QMatrix matrix = m_painter->matrix();
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m_painter->resetMatrix();
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Converter<Kern> convert;
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typename T::Finite_vertices_iterator vit;
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for (vit = t->finite_vertices_begin();
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vit != t->finite_vertices_end(); ++vit) {
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typename T::Site_2 s = vit->site();
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if ( s.is_input() ) {
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//*widget << CGAL::RED;
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} else {
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//*widget << CGAL::YELLOW;
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}
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if ( s.is_point() ) {
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QPointF point = matrix.map(convert(s.point()));
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m_painter->drawPoint(point);
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}
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}
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}
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}
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/*
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::operator()(typename T::Face_handle fh)
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{
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if(visibleFacesInDomain()) {
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if(fh->is_in_domain()){
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this->painterostream = PainterOstream<typename T::Geom_traits>(this->m_painter);
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this->m_painter->setBrush(facesInDomainBrush());
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this->m_painter->setPen(::Qt::NoPen) ;
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this->painterostream << this->t->triangle(fh);
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}
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}
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Base::operator()(fh);
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}
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*/
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template <typename T>
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QRectF
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SegmentDelaunayGraphGraphicsItem<T>::boundingRect() const
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{
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QRectF rect = CGAL::Qt::viewportsBbox(scene());
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return rect;
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}
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::modelChanged()
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{
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if((t->number_of_vertices() == 0) ){
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this->hide();
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} else if((t->number_of_vertices() > 0) && (! this->isVisible())){
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this->show();
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}
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update();
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}
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::updateBoundingBox()
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{
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prepareGeometryChange();
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if(t->number_of_vertices() == 0){
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bb = Bbox_2(0,0,0,0);
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bb_initialized = false;
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return;
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} else if(! bb_initialized){
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// bb = t->finite_vertices_begin()->point().bbox();
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bb_initialized = true;
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}
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/*
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if(t->dimension() <2){
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for(typename T::Finite_vertices_iterator it = t->finite_vertices_begin();
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it != t->finite_vertices_end();
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++it){
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bb = bb + it->point().bbox();
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}
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} else {
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typename T::Vertex_handle inf = t->infinite_vertex();
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typename T::Vertex_circulator vc = t->incident_vertices(inf), done(vc);
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do {
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bb = bb + vc->point().bbox();
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++vc;
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} while(vc != done);
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}
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bounding_rect = QRectF(bb.xmin(),
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bb.ymin(),
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bb.xmax()-bb.xmin(),
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bb.ymax()-bb.ymin());
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*/
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}
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template <typename T>
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void
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SegmentDelaunayGraphGraphicsItem<T>::paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option,
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QWidget * widget)
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{
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// painter->drawRect(boundingRect());
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// if ( t->dimension()<2 || option->exposedRect.contains(boundingRect()) ) {
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drawAll(painter, option);
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// } else {
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// std::cerr << "else" << std::endl;
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// }
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}
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} // namespace Qt
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} // namespace CGAL
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#endif // CGAL_QT_SEGMENT_DELAUNAY_GRAPH_GRAPHICS_ITEM_H
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