Function get_drag_drop_data

src/laybasic/laybasic/layViewObject.cc:291–308

  }

  DragDropDataBase *get_drag_drop_data (const QMimeData *data)
  {
    if (! data || ! data->hasFormat (QString::fromUtf8 (drag_drop_mime_type ()))) {
      return 0;
    }

    QByteArray ba = data->data (QString::fromUtf8 (drag_drop_mime_type ()));

    //  TODO: provide some global mechanism to register drag & drop classes
    std::unique_ptr<DragDropDataBase> cd (new CellDragDropData ());
    if (cd->deserialize (ba)) {
      return cd.release ();
    }

    //  TODO: more ...

    return 0;
  }

  void dragEnterEvent (QDragEnterEvent *event)
  {