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