(Fix the previous commit.)

QObjects must have parents!

GraphicsView/demo/GraphicsView/QTriangulationCircumcenter_2.h

@@ -41,7 +41,7 @@ private:
 
 template <typename T>
 QTriangulationCircumcenter_2<T>::QTriangulationCircumcenter_2(QGraphicsScene* s,
-                                                              T * dt_
+                                                              T * dt_,
                                                               QObject* parent)
   :  QtInput(parent), dt(dt_), scene_(s)
 {

GraphicsView/demo/GraphicsView/QTriangulationMovingPoint_2.h

@@ -19,7 +19,7 @@ public:
   typedef typename DT::Vertex_handle Vertex_handle;
   typedef typename DT::Point Point;
 
-  QTriangulationMovingPoint_2(DT  * dt_);
+  QTriangulationMovingPoint_2(DT  * dt_, QObject* parent);
 
 protected:
   void localize_and_insert_point(QPointF qt_point);