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#ifndef CGAL_QT_ARCS_GRAPHICS_ITEM_H
#define CGAL_QT_ARCS_GRAPHICS_ITEM_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 CK>
class ArcsGraphicsItem : public GraphicsItem
{
typedef typename CK::Circle_2 Circle_2;
typedef typename CK::Circular_arc_2 Circular_arc_2;
typedef typename CK::Circular_arc_point_2 Circular_arc_point_2;
typedef typename CK::Line_arc_2 Line_arc_2;
typedef std::variant<std::pair<Circular_arc_point_2,unsigned>, Circular_arc_2, Line_arc_2 > Inter_variant;
typedef std::variant<Circular_arc_2, Line_arc_2 > Arc_variant;
std::vector<Arc_variant>& arcs;
std::vector<Inter_variant>& intersections;
public:
ArcsGraphicsItem(std::vector<Arc_variant>& arcs_, std::vector<Inter_variant>& intersections_);
void modelChanged();
public:
QRectF boundingRect() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
const QPen& intersectionsPen() const
{
return intersections_pen;
}
const QPen& inputPen() const
{
return input_pen;
}
void setIntersectionsPen(const QPen& pen)
{
intersections_pen = pen;
}
void setInputPen(const QPen& pen)
{
input_pen = pen;
}
protected:
void updateBoundingBox();
QPainter* m_painter;
PainterOstream<CK> painterostream;
QRectF bounding_rect;
QPen intersections_pen;
QPen input_pen;
Converter<CK> convert;
};
template <typename CK>
ArcsGraphicsItem<CK>::ArcsGraphicsItem(std::vector<Arc_variant>& arcs_, std::vector<Inter_variant>& intersections_)
: arcs(arcs_), intersections(intersections_), painterostream(nullptr)
{
setIntersectionsPen(QPen(::Qt::red, 3.));
if(arcs.empty()){
this->hide();
}
updateBoundingBox();
setZValue(3);
}
template <typename CK>
QRectF
ArcsGraphicsItem<CK>::boundingRect() const
{
return bounding_rect;
}
template <typename CK>
void
ArcsGraphicsItem<CK>::paint(QPainter *painter,
const QStyleOptionGraphicsItem *,
QWidget * )
{
painter->setPen(this->inputPen());
painterostream = PainterOstream<CK>(painter);
for(typename std::vector<Arc_variant>::iterator it = arcs.begin(); it != arcs.end(); ++it){
Circular_arc_2 ca;
Line_arc_2 la;
if(auto ca = std::get_if<Circular_arc_2>(&(*it))){
painterostream << *ca;
} else if(auto la = std::get_if<Line_arc_2>(&(*it))){
painterostream << *la;
}
}
painter->setPen(this->intersectionsPen());
painterostream = PainterOstream<CK>(painter);
for(typename std::vector<Inter_variant>::iterator it = intersections.begin(); it != intersections.end(); ++it){
if(auto cap_ui = std::get_if<std::pair<Circular_arc_point_2,unsigned>>(&*it)){
QTransform matrix = painter->worldTransform();
painter->resetTransform();
painter->drawPoint(matrix.map(convert(cap_ui->first)));
painter->setWorldTransform(matrix);
}if(auto ca = std::get_if<Circular_arc_2>(&(*it))){
painterostream << *ca;
} else if(auto la = std::get_if<Line_arc_2>(&(*it))){
painterostream << *la;
}
}
}
template <typename CK>
void
ArcsGraphicsItem<CK>::updateBoundingBox()
{
bounding_rect = QRectF(0,0,100, 100);
Bbox_2 bb;
bool initialized = false;
for(typename std::vector<Arc_variant>::iterator it = arcs.begin(); it != arcs.end(); ++it){
Circular_arc_2 ca;
Line_arc_2 la;
if(auto ca = std::get_if<Circular_arc_2>(&(*it))){
if(initialized){
bb = bb + ca->supporting_circle().bbox();
} else {
initialized = true;
bb = ca->supporting_circle().bbox();
}
} else if(auto la = std::get_if<Line_arc_2>(&(*it))){
if(initialized){
bb = bb + la->bbox();
} else {
initialized = true;
bb = la->bbox();
}
}
}
prepareGeometryChange();
bounding_rect = convert(bb);
}
template <typename CK>
void
ArcsGraphicsItem<CK>::modelChanged()
{
if((arcs.empty()) ){
this->hide();
} else if((! arcs.empty()) && (! this->isVisible())){
this->show();
}
updateBoundingBox();
update();
}
} // namespace Qt
} // namespace CGAL
#endif // CGAL_QT_ARCS_GRAPHICS_ITEM_H
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