Hi all,

I try to make DnD in QTableView. I made a sub-class of QAbstractTableModel.

Qt Code: 
  1. #include "dragdroptableview.h"
  2.  
  3. DragDropTableView::DragDropTableView(QObject *parent) :
  5. {
  6. }
  7.  
  8. DragDropTableView::DragDropTableView(QList< QPair<QString, QString> > pairs, QObject *parent):
  10. {
  11.     listOfPairs = pairs;
  12. }
  13.  
  14. int DragDropTableView::rowCount(const QModelIndex &parent) const
  15.  {
  16.      Q_UNUSED(parent);
  17.      return listOfPairs.size();
  18.  }
  19.  
  20.  int DragDropTableView::columnCount(const QModelIndex &parent) const
  21.  {
  22.      Q_UNUSED(parent);
  23.      return 2;
  24.  }
  25.  
  26.  QVariant DragDropTableView::data(const QModelIndex &index, int role) const
  27.   {
  28.       if (!index.isValid())
  29.           return QVariant();
  30.  
  31.       if (index.row() >= listOfPairs.size() || index.row() < 0)
  32.           return QVariant();
  33.  
  34.       if (role == Qt::DisplayRole) {
  35.           QPair<QString, QString> pair = listOfPairs.at(index.row());
  36.  
  37.           if (index.column() == 0)
  38.               return pair.first;
  39.           else if (index.column() == 1)
  40.               return pair.second;
  41.       }
  42.       return QVariant();
  43.   }
  44.  
  45.  QVariant DragDropTableView::headerData(int section, Qt::Orientation orientation, int role) const
  46.   {
  47.       if (role != Qt::DisplayRole)
  48.           return QVariant();
  49.  
  50.       if (orientation == Qt::Horizontal) {
  51.           switch (section) {
  52.               case 0:
  53.                   return tr("Name");
  54.  
  55.               case 1:
  56.                   return tr("Address");
  57.  
  58.               default:
  59.                   return QVariant();
  60.           }
  61.       }
  62.       return QVariant();
  63.   }
  64.  
  65.  bool DragDropTableView::insertRows(int position, int rows, const QModelIndex &index)
  66.  {
  67.      Q_UNUSED(index);
  68.      beginInsertRows(QModelIndex(), position, position+rows-1);
  69.  
  70.      for (int row=0; row < rows; row++) {
  71.          QPair<QString, QString> pair(" ", " ");
  72.          listOfPairs.insert(position, pair);
  73.      }
  74.  
  75.      endInsertRows();
  76.      return true;
  77.  }
  78.  
  79.  bool DragDropTableView::removeRows(int position, int rows, const QModelIndex &index)
  80.  {
  81.      Q_UNUSED(index);
  82.      beginRemoveRows(QModelIndex(), position, position+rows-1);
  83.  
  84.      for (int row=0; row < rows; ++row) {
  85.          listOfPairs.removeAt(position);
  86.      }
  87.  
  88.      endRemoveRows();
  89.      return true;
  90.  }
  91.  
  92.  Qt::ItemFlags DragDropTableView::flags(const QModelIndex &index) const
  93.  {
  94.      if (!index.isValid())
  95.          return Qt::ItemIsEnabled;
  96.  
  97.      return QAbstractTableModel::flags(index) | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
  98.  }
  99.  
  100.  QStringList DragDropTableView::mimeTypes() const
  101.  {
  102.     QStringList types;
  103.     types << "application/vnd.text.list";
  104.     return types;
  105.  }
  106.  
  107.  QMimeData* DragDropTableView::mimeData(const QModelIndexList &indexes) const
  108.  {
  109.     QMimeData *mimeData = new QMimeData();
  110.     QByteArray encodedData;
  111.     QDataStream stream(&encodedData, QIODevice::WriteOnly);
  112.     QModelIndex index;
  113.     foreach (index, indexes)
  114.     {
  115.         if (index.isValid())
  116.         {
  117.             QString text;
  118.             text = data(index, Qt::DisplayRole).toString();
  119.             stream << text;
  120.         }
  121.     }
  122.     mimeData->setData("application/vnd.text.list", encodedData);
  123.     return mimeData;
  124. }
  125.  
  126. Qt::DropAction DragDropTableView::supportedDropActions()
  127. {
  128.     return Qt::MoveAction;
  129. }
  130.  
  131. bool DragDropTableView::dropMimeData(const QMimeData *data,
  132.                                      Qt::DropAction action,
  133.                                      int row, int column,
  134.                                      const QModelIndex &parent)
  135. {
  136.     Q_UNUSED(column)
  137.     if (!data->hasFormat("application/vnd.text.list"))
  138.     {
  139.         return false;
  140.     }
  141.     if (action == Qt::IgnoreAction)
  142.     {
  143.         return true;
  144.     }
  145.     int endRow = 0;
  146.     if (!parent.isValid() && row < 0)
  147.     {
  148.         endRow = listOfPairs.count();
  149.     }
  150.     else if (!parent.isValid())
  151.     {
  152.         endRow = qMin(row, listOfPairs.count());
  153.     }
  154.     else
  155.     {
  156.         endRow = parent.row();
  157.     }
  158.  
  159.     QByteArray encodedData = data->data("application/vnd.text.list");
  160.     QDataStream stream(&encodedData, QIODevice::ReadOnly);
  161.  
  162.     while (!stream.atEnd())
  163.     {
  164.         QString first, second;
  165.         stream >> first >> second;
  166.         QPair <QString, QString> pair(first, second);
  167.         beginInsertRows(QModelIndex(), endRow, endRow);
  168.         listOfPairs.insert(endRow, pair);
  169.         endInsertRows();
  170.         endRow ++;
  171.     }
  172.     return true;
  173. }
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When I DnD some item from first table to second the item is copied into second table, but not removed from first table.

Any ideas?