162 lines
3.4 KiB
C++
162 lines
3.4 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).
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/GraphicsView/include/CGAL/Qt/PointsGraphicsItem.h $
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// $Id: PointsGraphicsItem.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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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_POINTS_GRAPHICS_ITEM_H
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#define CGAL_QT_POINTS_GRAPHICS_ITEM_H
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#include <CGAL/license/GraphicsView.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 PointsGraphicsItem : public GraphicsItem
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{
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typedef typename std::iterator_traits<typename P::iterator>::value_type Point_2;
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typedef typename CGAL::Kernel_traits<Point_2>::Kernel Traits;
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public:
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PointsGraphicsItem(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 * points;
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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_vertices;
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};
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template <typename P>
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PointsGraphicsItem<P>::PointsGraphicsItem(P * p_)
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: points(p_), painterostream(0), draw_vertices(true)
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{
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setVerticesPen(QPen(::Qt::red, 3.));
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if(points->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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PointsGraphicsItem<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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PointsGraphicsItem<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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if(drawVertices()) {
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Converter<Traits> convert;
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painter->setPen(verticesPen());
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QTransform matrix = painter->worldTransform();
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painter->resetTransform();
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for(typename P::iterator it = points->begin();
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it != points->end();
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it++){
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QPointF point = matrix.map(convert(*it));
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painter->drawPoint(point);
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}
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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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PointsGraphicsItem<P>::updateBoundingBox()
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{
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Converter<Traits> convert;
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prepareGeometryChange();
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if(points->size() == 0){
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return;
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}
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bounding_rect = convert(CGAL::bounding_box(points->begin(), points->end()));
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}
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template <typename P>
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void
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PointsGraphicsItem<P>::modelChanged()
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{
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if((points->size() == 0) ){
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this->hide();
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} else if((points->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_POINTS_GRAPHICS_ITEM_H
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