211 lines
4.3 KiB
C++
Executable File
211 lines
4.3 KiB
C++
Executable File
// 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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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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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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// SPDX-License-Identifier: GPL-3.0+
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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_REGULAR_GRID_GRAPHICS_ITEM_H
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#define CGAL_QT_REGULAR_GRID_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/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 <CGAL/Qt/utility.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 K>
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class RegularGridGraphicsItem : public GraphicsItem
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{
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typedef K Geom_traits;
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typedef typename K::Point_2 Point_2;
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typedef typename K::Vector_2 Vector_2;
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typedef typename K::Segment_2 Segment_2;
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public:
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RegularGridGraphicsItem(double dx, double dy);
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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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const QPen& edgesPen() const
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{
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return edges_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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void setEdgesPen(const QPen& pen)
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{
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edges_pen = pen;
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}
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bool visibleVertices() const
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{
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return visible_vertices;
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}
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void setVisibleVertices(const bool b)
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{
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visible_vertices = b;
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update();
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}
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bool visibleEdges() const
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{
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return visible_edges;
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}
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void setVisibleEdges(const bool b)
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{
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visible_edges = b;
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update();
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}
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void setDelta(double x, double y)
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{
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dx = x;
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dy = y;
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update();
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}
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protected:
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void updateBoundingBox();
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double dx, dy;
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QPainter* m_painter;
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PainterOstream<Geom_traits> painterostream;
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QPen vertices_pen;
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QPen edges_pen;
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bool visible_edges;
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bool visible_vertices;
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};
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template <typename K>
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RegularGridGraphicsItem<K>::RegularGridGraphicsItem(double dx, double dy)
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: dx(dx), dy(dy), painterostream(0),
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visible_edges(true), visible_vertices(true)
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{
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setVerticesPen(QPen(::Qt::red, 3.));
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setZValue(-1);
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}
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template <typename K>
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QRectF
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RegularGridGraphicsItem<K>::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 K>
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void
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RegularGridGraphicsItem<K>::paint(QPainter *painter,
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const QStyleOptionGraphicsItem * /*option*/,
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QWidget * /*widget*/)
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{
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QRectF rect = boundingRect();
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double b = rect.bottom();
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double t = rect.top();
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double l = rect.left();
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double r = rect.right();
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if(b > t) std::swap(b,t); // because things are upside down in Qt
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painterostream = PainterOstream<Geom_traits>(painter);
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painter->setPen(this->edgesPen());
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double ll = l;
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ll = dx * static_cast<int>(ll/dx);
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for(; ll < r; ll += dx){
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painterostream << Segment_2(Point_2(ll,b),
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Point_2(ll,t));
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}
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double bb = b;
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bb = dy * static_cast<int>(bb/dy);
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for(; bb < t; bb += dy){
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painterostream << Segment_2(Point_2(l,bb),
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Point_2(r,bb));
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}
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/*
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painter->setPen(this->verticesPen());
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QMatrix matrix = painter->matrix();
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painter->resetMatrix();
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for(int i = 0; i < nw; i++){
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for(int j = 0; j < nh; j++){
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painter->drawPoint(matrix.map(QPointF(i*dw, j*dh)));
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}
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}
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*/
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}
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template <typename K>
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void
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RegularGridGraphicsItem<K>::updateBoundingBox()
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{}
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template <typename K>
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void
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RegularGridGraphicsItem<K>::modelChanged()
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{
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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_REGULAR_GRID_GRAPHICS_ITEM_H
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