193 lines
4.2 KiB
C++
193 lines
4.2 KiB
C++
// Copyright (c) 2008 GeometryFactory Sarl (France).
|
|
// All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org).
|
|
//
|
|
// $URL: https://github.com/CGAL/cgal/blob/v5.1/GraphicsView/include/CGAL/Qt/RegularGridVectorFieldGraphicsItem.h $
|
|
// $Id: RegularGridVectorFieldGraphicsItem.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
|
|
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
//
|
|
// Author(s) : Andreas Fabri <Andreas.Fabri@geometryfactory.com>
|
|
// Laurent Rineau <Laurent.Rineau@geometryfactory.com>
|
|
|
|
#ifndef CGAL_QT_REGULAR_GRID_VECTOR_FIELD_GRAPHICS_ITEM_H
|
|
#define CGAL_QT_REGULAR_GRID_VECTOR_FIELD_GRAPHICS_ITEM_H
|
|
|
|
#include <CGAL/license/GraphicsView.h>
|
|
|
|
|
|
#include <CGAL/Bbox_2.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 T, typename K>
|
|
class RegularGridVectorFieldGraphicsItem : public GraphicsItem
|
|
{
|
|
typedef typename T::Geom_traits Geom_traits;
|
|
typedef typename K::Point_2 Point_2;
|
|
typedef typename K::Vector_2 Vector_2;
|
|
typedef typename K::Segment_2 Segment_2;
|
|
|
|
public:
|
|
RegularGridVectorFieldGraphicsItem(T* t_);
|
|
|
|
void modelChanged();
|
|
|
|
public:
|
|
|
|
QRectF boundingRect() const;
|
|
|
|
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
|
|
|
|
|
|
const QPen& verticesPen() const
|
|
{
|
|
return vertices_pen;
|
|
}
|
|
|
|
const QPen& edgesPen() const
|
|
{
|
|
return edges_pen;
|
|
}
|
|
|
|
void setVerticesPen(const QPen& pen)
|
|
{
|
|
vertices_pen = pen;
|
|
}
|
|
|
|
void setEdgesPen(const QPen& pen)
|
|
{
|
|
edges_pen = pen;
|
|
}
|
|
|
|
bool visibleVertices() const
|
|
{
|
|
return visible_vertices;
|
|
}
|
|
|
|
void setVisibleVertices(const bool b)
|
|
{
|
|
visible_vertices = b;
|
|
update();
|
|
}
|
|
|
|
bool visibleEdges() const
|
|
{
|
|
return visible_edges;
|
|
}
|
|
|
|
void setVisibleEdges(const bool b)
|
|
{
|
|
visible_edges = b;
|
|
update();
|
|
}
|
|
|
|
protected:
|
|
void updateBoundingBox();
|
|
|
|
T * rg;
|
|
QPainter* m_painter;
|
|
PainterOstream<Geom_traits> painterostream;
|
|
|
|
QRectF bounding_rect;
|
|
|
|
QPen vertices_pen;
|
|
QPen edges_pen;
|
|
bool visible_edges;
|
|
bool visible_vertices;
|
|
};
|
|
|
|
|
|
template <typename T, typename K>
|
|
RegularGridVectorFieldGraphicsItem<T,K>::RegularGridVectorFieldGraphicsItem(T * t_)
|
|
: rg(t_), painterostream(0),
|
|
visible_edges(true), visible_vertices(true)
|
|
{
|
|
setVerticesPen(QPen(::Qt::red, 3.));
|
|
updateBoundingBox();
|
|
setZValue(3);
|
|
}
|
|
|
|
template <typename T, typename K>
|
|
QRectF
|
|
RegularGridVectorFieldGraphicsItem<T,K>::boundingRect() const
|
|
{
|
|
return bounding_rect;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
template <typename T, typename K>
|
|
void
|
|
RegularGridVectorFieldGraphicsItem<T,K>::paint(QPainter *painter,
|
|
const QStyleOptionGraphicsItem * /*option*/,
|
|
QWidget * /*widget*/)
|
|
{
|
|
|
|
painterostream = PainterOstream<Geom_traits>(painter);
|
|
painter->setPen(this->edgesPen());
|
|
double w = rg->get_size().first;
|
|
double h = rg->get_size().second;
|
|
int nw = rg->get_dimension().first;
|
|
int nh = rg->get_dimension().second;
|
|
double dw = w/(nw-1);
|
|
double dh = h/(nh-1);
|
|
|
|
for(int i = 0; i < nw; i++){
|
|
for(int j = 0; j < nh; j++){
|
|
Vector_2 v = rg->get_field(i,j);
|
|
v = (dw*0.45) * v/sqrt(v*v);
|
|
painterostream << Segment_2(Point_2(i*dw,j*dh),
|
|
Point_2(i*dw,j*dw)+v);
|
|
}
|
|
}
|
|
painter->setPen(this->verticesPen());
|
|
QTransform matrix = painter->worldTransform();
|
|
painter->resetTransform();
|
|
for(int i = 0; i < nw; i++){
|
|
for(int j = 0; j < nh; j++){
|
|
painter->drawPoint(matrix.map(QPointF(i*dw, j*dh)));
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// We let the bounding box only grow, so that when vertices get removed
|
|
// the maximal bbox gets refreshed in the GraphicsView
|
|
template <typename T, typename K>
|
|
void
|
|
RegularGridVectorFieldGraphicsItem<T,K>::updateBoundingBox()
|
|
{
|
|
|
|
bounding_rect = QRectF(0,
|
|
0,
|
|
rg->get_size().first,
|
|
rg->get_size().second);
|
|
}
|
|
|
|
|
|
template <typename T, typename K>
|
|
void
|
|
RegularGridVectorFieldGraphicsItem<T,K>::modelChanged()
|
|
{
|
|
update();
|
|
}
|
|
|
|
|
|
} // namespace Qt
|
|
} // namespace CGAL
|
|
|
|
#endif // CGAL_QT_REGULAR_GRID_VECTOR_FIELD_GRAPHICS_ITEM_H
|