@VRonin said in Implement QSortFilterProxyModel with own TreeModel?: Good guess, can you show us your code? I solved it: I had to pass the parent index (tree structure), so the line should look like this: QVariant data = m_proxy->data(m_proxy->index(index.row(), 4, index.parent()));

thanks. i will try it :)

The best way seems to use QDropEvent::source to get the QTreeWidget and use currentItem() on it. :)