From e28a3ac2cc9e05228588a408c75d5efccc851882 Mon Sep 17 00:00:00 2001
From: Maxime Gimeno <maxime.gimeno@gmail.com>
Date: Tue, 2 Jun 2020 12:55:25 +0200
Subject: [PATCH 1/2] Fix some edge width and add a double click event to add a
 0 wheighted point.

---
 .../demo/Triangulation_2/Regular_triangulation_2.cpp     | 1 +
 GraphicsView/include/CGAL/Qt/GraphicsViewCircleInput.h   | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/GraphicsView/demo/Triangulation_2/Regular_triangulation_2.cpp b/GraphicsView/demo/Triangulation_2/Regular_triangulation_2.cpp
index fcaf1aba96d..aa29cf6f160 100644
--- a/GraphicsView/demo/Triangulation_2/Regular_triangulation_2.cpp
+++ b/GraphicsView/demo/Triangulation_2/Regular_triangulation_2.cpp
@@ -94,6 +94,7 @@ MainWindow::MainWindow()
                    dgi, SLOT(modelChanged()));
 
   dgi->setVerticesPen(QPen(Qt::red, 0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+  dgi->setEdgesPen(QPen(Qt::black, 0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
   scene.addItem(dgi);
 
   // Add a GraphicItem for the Powerdiagram diagram
diff --git a/GraphicsView/include/CGAL/Qt/GraphicsViewCircleInput.h b/GraphicsView/include/CGAL/Qt/GraphicsViewCircleInput.h
index 214de4ffe40..9d8dbd490c0 100644
--- a/GraphicsView/include/CGAL/Qt/GraphicsViewCircleInput.h
+++ b/GraphicsView/include/CGAL/Qt/GraphicsViewCircleInput.h
@@ -28,6 +28,7 @@
 #include <QStyleOption>
 #include <QKeyEvent>
 
+
 #include <CGAL/Qt/Converter.h>
 #include <CGAL/Qt/GraphicsViewInput.h>
 
@@ -71,6 +72,7 @@ GraphicsViewCircleInput<K>::GraphicsViewCircleInput(QObject *parent, QGraphicsSc
   : GraphicsViewInput(parent), m_pointsOnCircle(pointsOnCircle),
     count(0), qcircle(new QGraphicsEllipseItem()), scene_(s)
 {
+  qcircle->setPen(QPen(::Qt::red, 0, ::Qt::SolidLine, ::Qt::RoundCap, ::Qt::RoundJoin));
   qcircle->hide();
   s->addItem(qcircle);
 }
@@ -194,6 +196,13 @@ GraphicsViewCircleInput<K>::eventFilter(QObject *obj, QEvent *event)
     QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
     keyPressEvent(keyEvent);
     return true;
+  } else if(event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
+    QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
+    qp = mouseEvent->scenePos();
+    p = convert(qp);
+    Q_EMIT generate(CGAL::make_object(std::make_pair(p, 0.0)));
+    count = 0;
+    return true;
   } else{
     // standard event processing
     return QObject::eventFilter(obj, event);

From dd701e28fa81bed61d94a748b108c866ee18bca8 Mon Sep 17 00:00:00 2001
From: Maxime Gimeno <maxime.gimeno@gmail.com>
Date: Tue, 2 Jun 2020 14:08:03 +0200
Subject: [PATCH 2/2] Fix Delaunay point removal

---
 .../TriangulationPointInputAndConflictZone.h         | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/GraphicsView/demo/Triangulation_2/TriangulationPointInputAndConflictZone.h b/GraphicsView/demo/Triangulation_2/TriangulationPointInputAndConflictZone.h
index ce85d87d9c2..b387e314025 100644
--- a/GraphicsView/demo/Triangulation_2/TriangulationPointInputAndConflictZone.h
+++ b/GraphicsView/demo/Triangulation_2/TriangulationPointInputAndConflictZone.h
@@ -37,6 +37,7 @@ protected:
   Converter<K> convert;
   QGraphicsScene *scene_;
   Point p;
+  bool do_insert;
 };
 
 
@@ -44,7 +45,7 @@ template <typename T>
 TriangulationPointInputAndConflictZone<T>::TriangulationPointInputAndConflictZone(QGraphicsScene* s,
                                                         T * dt_,
                                                         QObject* parent)
-  :  GraphicsViewInput(parent), dt(dt_), scene_(s)
+  :  GraphicsViewInput(parent), dt(dt_), scene_(s), do_insert(true)
 {}
 
 
@@ -54,6 +55,12 @@ template <typename T>
 void
 TriangulationPointInputAndConflictZone<T>::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
+  if(event->modifiers()  & ::Qt::ShiftModifier){
+    do_insert = false;
+    return;
+  }
+  else
+    do_insert = true;
   p = convert(event->scenePos());
   if(dt->dimension() < 2 ||
      event->modifiers() != 0 ||
@@ -91,7 +98,8 @@ TriangulationPointInputAndConflictZone<T>::mouseReleaseEvent(QGraphicsSceneMouse
     delete *it;
   }
   qfaces.clear();
-  Q_EMIT( generate(CGAL::make_object(p)));
+  if(do_insert)
+    Q_EMIT( generate(CGAL::make_object(p)));
 }