mirror of https://github.com/CGAL/cgal
133 lines
3.0 KiB
C++
133 lines
3.0 KiB
C++
#ifndef CGAL_QT_TRIANGULATION_CIRCUMCIRCLE_H
|
|
#define CGAL_QT_TRIANGULATION_CIRCUMCIRCLE_H
|
|
|
|
#include <QGraphicsSceneMouseEvent>
|
|
#include <QGraphicsScene>
|
|
#include <QGraphicsEllipseItem>
|
|
#include <QEvent>
|
|
#include <QPen>
|
|
|
|
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
|
|
#include <CGAL/Qt/GraphicsViewInput.h>
|
|
|
|
namespace CGAL {
|
|
namespace Qt {
|
|
|
|
template <typename DT>
|
|
class TriangulationCircumcircle : public GraphicsViewInput
|
|
{
|
|
public:
|
|
TriangulationCircumcircle(QGraphicsScene* s, DT * dt_, QObject* parent);
|
|
~TriangulationCircumcircle();
|
|
|
|
void setPen(const QPen& pen);
|
|
|
|
void show();
|
|
void hide();
|
|
|
|
protected:
|
|
|
|
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
|
|
bool eventFilter(QObject *obj, QEvent *event);
|
|
|
|
private:
|
|
|
|
DT * dt;
|
|
typedef typename DT::Vertex_handle Vertex_handle;
|
|
typename DT::Vertex_handle hint;
|
|
typename DT::Face_handle fh;
|
|
QGraphicsScene *scene_;
|
|
QGraphicsEllipseItem* circle;
|
|
};
|
|
|
|
|
|
template <typename T>
|
|
TriangulationCircumcircle<T>::TriangulationCircumcircle(QGraphicsScene* s,
|
|
T * dt_,
|
|
QObject* parent)
|
|
: GraphicsViewInput(parent), dt(dt_), scene_(s)
|
|
{
|
|
hint = dt->infinite_vertex();
|
|
circle = new QGraphicsEllipseItem();
|
|
circle->hide();
|
|
scene_->addItem(circle);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
TriangulationCircumcircle<T>::~TriangulationCircumcircle()
|
|
{
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
TriangulationCircumcircle<T>::setPen(const QPen& pen)
|
|
{
|
|
circle->setPen(pen);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
TriangulationCircumcircle<T>::show()
|
|
{
|
|
circle->show();
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
TriangulationCircumcircle<T>::hide()
|
|
{
|
|
circle->hide();
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
TriangulationCircumcircle<T>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
|
|
{
|
|
if(dt->dimension() != 2){
|
|
circle->hide();
|
|
hint = Vertex_handle();
|
|
return;
|
|
}
|
|
if (hint == Vertex_handle()){
|
|
hint = dt->infinite_vertex();
|
|
}
|
|
typename T::Point p = typename T::Point(event->scenePos().x(), event->scenePos().y());
|
|
fh = dt->locate(p, hint->face());
|
|
hint = fh->vertex(0);
|
|
if(!dt->is_infinite(fh)){
|
|
typename T::Geom_traits::Circle_2 c(fh->vertex(0)->point(),
|
|
fh->vertex(1)->point(),
|
|
fh->vertex(2)->point());
|
|
CGAL::Bbox_2 bb = c.bbox();
|
|
circle->setRect(bb.xmin(), bb.ymin(), bb.xmax()-bb.xmin(), bb.ymax()-bb.ymin());
|
|
circle->show();
|
|
} else {
|
|
circle->hide();
|
|
}
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
bool
|
|
TriangulationCircumcircle<T>::eventFilter(QObject *obj, QEvent *event)
|
|
{
|
|
if (event->type() == QEvent::GraphicsSceneMouseMove) {
|
|
QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
|
|
mouseMoveEvent(mouseEvent);
|
|
return false; // don't consume the event
|
|
} else{
|
|
// standard event processing
|
|
return QObject::eventFilter(obj, event);
|
|
}
|
|
}
|
|
|
|
} // namespace Qt
|
|
} // namespace CGAL
|
|
|
|
#endif // CGAL_QT_TRIANGULATION_CIRCUMCIRCLE_H
|