Hello Again!

If you don't call the base class implementation, the scene shouldn't receive the event.
OK, so there's the problem? I see the exact opposite of this.

Shall we have a quick overview of my code -

View header file

Qt Code: 
  1. class myView : public QGraphicsView
  2. {
  3. public:
  4.     myView(QWidget *parent=0);
  5. protected:
  6.  
  7.     void dragEnterEvent(QDragEnterEvent *event);
  8.     void dropEvent(QDropEvent *event);
  9.     void dragMoveEvent(QDragMoveEvent *event);
  10.  
  11. };
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view methods

Qt Code: 
  1. myView::myView(QWidget *parent) : QGraphicsView(parent) {
  2. //        setAcceptDrops(true);
  3.         // Comment the line below, and drop starts working
  4.         setScene(new QGraphicsScene(this));
  5. }
  6.  
  7. void myView::dragEnterEvent(QDragEnterEvent *event) {
  8. //        event->accept();
  9.         qDebug() << "View: dragEnterEvent";
  10.         QGraphicsView::dragEnterEvent(event);
  11. }
  12.  
  13. void myView::dropEvent(QDropEvent *event) {
  14.     QPointF pnt;
  15.     QPoint pos;
  17.  
  18.     qDebug() << "View sees drop";
  19.  
  20.     pos = event->pos();
  21.     pnt = this->mapToScene( event->pos() );
  22.  
  23.     if (itm = itemAt( pos ) )
  24.     {
  25.         qDebug("There is an item here");
  26.         QGraphicsView::dropEvent(event);
  27.         return;
  28.     }
  29.     else
  30.     {
  31.         qDebug("Blank area");
  32.     }
  33.     // Is there something underneath?
  34.  
  35.     QByteArray ba = event->mimeData()->data("foo/bar");
  36.     QDataStream ds(&ba, QIODevice::ReadOnly);
  37.     while (!ds.atEnd()) {
  38.         QString name;
  39.         QString path;
  40.         QString monid;
  41.         MyNode * nd;
  42.         ds >> name >> path >> monid;
  43.         qDebug() << name << path << monid;
  44.  
  45.         //
  46.         // This view is inside the central widget which is in the mainwindow, so node
  47.         // parent is the mainwindow so it can access the action functions.  a bit
  48.         // untiy huh?
  49.         //
  50.         if (QString("Button")==name)
  51.           nd = new MyNode( (QWidget*)(this->parent())->parent(), name, path, monid, MyNode::BUTTON);
  52.         else
  53.           nd = new MyNode( (QWidget*)(this->parent())->parent(), name, path, monid, MyNode::POINT);
  55.         sc = this->scene();
  56.  
  57.         pnt = this->mapToScene( event->pos() );
  58.         qDebug() << pnt;
  59.         nd->setPos(pnt);
  60.         sc->addItem(nd);
  61.     }
  62. }
  63.  
  64. void myView::dragMoveEvent(QDragMoveEvent *event) {
  65. }
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Scene header

Qt Code: 
  1. class myScene : public QGraphicsScene
  2. {
  3. public:
  4.     myScene(QObject *parent);
  5.     void dropEvent(QGraphicsSceneDragDropEvent * event);
  6.     void dragEnterEvent(QGraphicsSceneDragDropEvent * event);
  7. };
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scene code

Qt Code: 
  1. myScene::myScene(QObject*parent): QGraphicsScene(parent)
  2. {
  3. }
  4.  
  5. void myScene::dropEvent(QGraphicsSceneDragDropEvent * event)
  6. {
  7.     qDebug() << "scene: dropEvent";
  8.     qDebug() << items(event->scenePos()).count();
  9.  
  10.     this->setFocus(Qt::NoFocusReason);
  11.  
  13.  
  14.     gi = this->itemAt( event->scenePos() );
  15.  
  16.     if (gi)
  17.     {
  18.         qDebug() << "Scene(dropEvent); there is an item thar";
  19.         gi->setFocus(Qt::NoFocusReason);
  20.         gi->setSelected(true);
  21.     }
  22.  
  23.     QGraphicsScene::dropEvent(event);
  24. }
  25.  
  26. void myScene::dragEnterEvent(QGraphicsSceneDragDropEvent * event)
  27. {
  28.     event->acceptProposedAction();
  30.  
  31.     gi = this->itemAt( event->scenePos() );
  32.  
  33.     if (gi)
  34.     {
  35.         qDebug() << "Scene(dragEnterEvent); there is an item thar";
  36.         gi->setFocus(Qt::NoFocusReason);
  37.         gi->setSelected(true);
  38.     }
  39.  
  40.     qDebug() << "scene: dragEnterEvent";
  41.     QGraphicsScene::dragEnterEvent(event);
  42. }
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And finally item header

Qt Code: 
  1. class MyNode : public QGraphicsItem
  2. {
  3. public:
  4.     int MonId;
  5.     int ValInt;
  6.     int DataType;
  7.     QString endnode;
  8.     QString path;
  9.     QString monid;
  10.  
  11.     enum MimicType { LAMP, BUTTON, POINT };
  12.     MimicType mimic;
  13.     int EditMode;
  14.  
  15.  
  16.     MyNode(QWidget * parent, QString endnode, QString path, QString monid, MimicType mt);
  17.     QRectF boundingRect() const;
  18.     void paint(QPainter *painter, const QStyleOptionGraphicsItem * option, QWidget *widget);
  19.     void mousePressEvent(QGraphicsSceneMouseEvent * event);
  20.     void mouseReleaseEvent(QGraphicsSceneMouseEvent * event);
  21.     void dropEvent(QGraphicsSceneDragDropEvent * event);
  22.     void dragEnterEvent(QGraphicsSceneDragDropEvent * event);
  23.     void dragMoveEvent(QGraphicsSceneDragDropEvent * event);
  24.     void myupdate();
  25.     void createActions();
  26.     QAction * myAct;
  27.     void passDrop(QDropEvent * event);
  28.  
  29. private slots:
  30.     void doMyAct();
  31.     QWidget * parent;
  32. };
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and the item drag methods...

Qt Code: 
  1. void MyNode::dragEnterEvent(QGraphicsSceneDragDropEvent * event)
  2. {
  3.     qDebug() << "Node: dragEnterEvent";
  4.     //event->setAccepted(true);
  5.     //event->accept();
  6.     event->acceptProposedAction();
  7.     QGraphicsItem::dragEnterEvent(event);
  8. }
  9. void MyNode::dragMoveEvent(QGraphicsSceneDragDropEvent * event)
  10. {
  11.     qDebug() << "Node: dragMoveEvent";
  12.     event->accept();
  13.     QGraphicsItem::dragMoveEvent(event);
  14. }
  15. void MyNode::dropEvent(QGraphicsSceneDragDropEvent * event)
  16. {
  17.     qDebug() << "Node: dropEvent";
  18.     QGraphicsItem::dropEvent(event);
  19. }
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