Does QML TreeView support signal layoutChanged emitted from model?

Denis Demidovich

I have a model that works well with QTreeView. In the model I implemented a sort that looks like this:

void SimpleTreeModel::sort(Node* sortedNode)
{
  emit layoutAboutToBeChanged(QList<QPersistentModelIndex>(), VerticalSortHint);
  QModelIndexList oldIndices = persistentIndexList();

  Node::SortType sortType = Node::Down;

  //sort starting node
  sortedNode->sortChildren(sortType);

  QModelIndexList newIndices;
  newIndices.reserve(oldIndices.size());
  for(const auto &i : oldIndices)
  {
      Node* node = const_cast<Node*>(nodeFromIndex(i));
      QModelIndex index = indexFromNode(node);
      newIndices.push_back(index);
  }
  changePersistentIndexList(oldIndices, newIndices);

  QModelIndex startingIndex = indexFromNode(sortedNode);
  emit layoutChanged({ QPersistentModelIndex(startingIndex) }, VerticalSortHint);
}

when I call this function, QTreeView updates the view, but TreeView in QML don't do this. QML TreeView usage:

TreeView
{
   model: treeModel
   TableViewColumn 
   {
     title: "Title"
     role: "title"
     width: 700
   }
}

What am I doing wrong? Why the view does not update the layout of the elements after sorting?