Hi, I sub-classed QListWidget to handle drag&drop. This new object should handle both internal move and item copy when drag&drop between qlistwidgets. I achieved the latter (copy on drop) but internal move is a problem: I'm unable to get it right. This is my implementation:

Qt Code: 
  1. MyListWidget::MyListWidget(QWidget *parent) :
  2.     QListWidget(parent)
  3. {
  4.     setAlternatingRowColors(true);
  5.  
  6.     setDragEnabled(true);
  7.     setDragDropMode(QAbstractItemView::InternalMove);
  8.     setDropIndicatorShown(true);
  9.  
  10.     setAcceptDrops(true);
  11. }
  12.  
  13. void MyListWidget::dragEnterEvent(QDragEnterEvent *event)
  14. {
  15.     if(event->source() == this) {
  16.         QListWidget::dragEnterEvent(event);
  17.     } else if (event->mimeData()->hasFormat("application/x-myapp")) {
  18.         if (event->source() == this) {
  19.             event->setDropAction(Qt::MoveAction);
  20.             event->accept();
  21.         } else {
  22.             event->acceptProposedAction();
  23.         }
  24.     } else {
  25.         event->ignore();
  26.     }
  27. }
  28.  
  29. void MyListWidget::dragMoveEvent(QDragMoveEvent *event)
  30. {
  31.     if(event->source() == this) {
  32.         QListWidget::dragMoveEvent(event);
  33.     } else if (event->mimeData()->hasFormat("application/x-myapp")) {
  34.         if (event->source() == this) {
  35.             event->setDropAction(Qt::MoveAction);
  36.             event->accept();
  37.         } else {
  38.             event->acceptProposedAction();
  39.         }
  40.     } else {
  41.         event->ignore();
  42.     }
  43. }
  44.  
  45. void MyListWidget::dropEvent(QDropEvent *event)
  46. {
  47.     if (event->source() == this) {
  48.         QListWidget::dropEvent(event);
  49.     } else if (event->mimeData()->hasFormat("application/x-myapp")) {
  50.         QByteArray itemData = event->mimeData()->data("application/x-myapp");
  51.         QDataStream dataStream(&itemData, QIODevice::ReadOnly);
  52.  
  53.         People people;
  54.         dataStream >> people;
  55.  
  56.         if (event->source() == this) {
  57.             event->setDropAction(Qt::MoveAction);
  58.             event->accept();
  59.         } else {
  60.             PeopleItem *peopleItem = new PeopleItem(people, this);
  62.             addItem(wItem);
  63.             setItemWidget(wItem, peopleItem);
  64.             wItem->setSizeHint(QSize(40,40));
  65.             event->acceptProposedAction();
  66.         }
  67.     } else {
  68.         event->ignore();
  69.     }
  70. }
  71.  
  72. void MyListWidget::mousePressEvent(QMouseEvent *event)
  73. {
  74.     People people = ((PeopleItem *)itemWidget(itemAt(event->pos())))->people();
  75.  
  76.     QByteArray itemData;
  77.     QDataStream dataStream(&itemData, QIODevice::WriteOnly);
  78.     dataStream << people;
  79.  
  80.     QMimeData *mimeData = new QMimeData;
  81.     mimeData->setData("application/x-myapp", itemData);
  82.  
  83.     QDrag *drag = new QDrag(this);
  84.     drag->setMimeData(mimeData);
  85.  
  86.     drag->exec(Qt::CopyAction);
  87. }
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Where's my error?

Thanks,