mirror of https://github.com/CGAL/cgal
150 lines
3.7 KiB
C++
150 lines
3.7 KiB
C++
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#ifndef CGAL_QT_TRIANGULATION_MOVING_POINT
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#define CGAL_QT_TRIANGULATION_MOVING_POINT
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#include <CGAL/Qt/GraphicsViewInput.h>
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#include <CGAL/Qt/Converter.h>
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#include <QGraphicsSceneMouseEvent>
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#include <QEvent>
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#include <list>
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namespace CGAL {
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namespace Qt {
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template <typename DT>
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class TriangulationMovingPoint : public GraphicsViewInput
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{
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public:
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typedef typename DT::Face_handle Face_handle;
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typedef typename DT::Vertex_handle Vertex_handle;
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typedef typename DT::Point Point;
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TriangulationMovingPoint(DT * dt_, QObject* parent);
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protected:
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void localize_and_insert_point(QPointF qt_point);
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void mousePressEvent(QGraphicsSceneMouseEvent *event);
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void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
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void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
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bool eventFilter(QObject *obj, QEvent *event);
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DT * dt;
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Vertex_handle vh;
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bool movePointToInsert;
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bool insertedPoint;
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};
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template <typename T>
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TriangulationMovingPoint<T>::TriangulationMovingPoint(T * dt_,
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QObject* parent)
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: GraphicsViewInput(parent), dt(dt_), vh(), movePointToInsert(false), insertedPoint(false)
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{}
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template <typename T>
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void
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TriangulationMovingPoint<T>::localize_and_insert_point(QPointF qt_point)
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{
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Converter<typename T::Geom_traits> convert;
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Point p = convert(qt_point);
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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 = Point(p.x()- std::floor(p.x()/dx), p.y()- std::floor(p.y()/dy));
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typename T::Locate_type lt;
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int li;
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Face_handle fh = (vh == Vertex_handle()) ? Face_handle() : vh->face();
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fh = dt->locate(p, lt, li, fh); // fh serves as a hint
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if(lt != T::VERTEX){
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vh = dt->insert(p, lt, fh, li);
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insertedPoint = true;
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Q_EMIT( modelChanged());
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} else {
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vh = fh->vertex(0);
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insertedPoint = false;
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}
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}
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template <typename T>
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void
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TriangulationMovingPoint<T>::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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if(dt->number_of_vertices() == 0 ||
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event->modifiers() != 0 ||
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event->button() != ::Qt::LeftButton) {
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return;
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}
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movePointToInsert = true;
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localize_and_insert_point(event->scenePos());
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}
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template <typename T>
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void
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TriangulationMovingPoint<T>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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if (!movePointToInsert) return;
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if (insertedPoint && (vh != Vertex_handle())) {
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dt->remove(vh);
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vh = Vertex_handle();
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}
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localize_and_insert_point(event->scenePos());
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}
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template <typename T>
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void
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TriangulationMovingPoint<T>::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
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{
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if (! movePointToInsert || event->button() != ::Qt::LeftButton) {
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return;
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}
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if (insertedPoint && (vh != Vertex_handle())) {
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dt->remove(vh);
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vh = Vertex_handle();
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}
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Q_EMIT( modelChanged());
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movePointToInsert = false;
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}
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template <typename T>
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bool
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TriangulationMovingPoint<T>::eventFilter(QObject *obj, QEvent *event)
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{
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if (event->type() == QEvent::GraphicsSceneMousePress) {
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QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
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mousePressEvent(mouseEvent);
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return true;
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} else 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; // do not eat move event!
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} else if (event->type() == QEvent::GraphicsSceneMouseRelease) {
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QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
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mouseReleaseEvent(mouseEvent);
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return true;
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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_MOVING_POINT
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