Automatically expand subtree on drag&drop hover over node

Hello all
My user can reorder nodes of a tree through drag&drop. To make this process easier, I would like that, while dragging, if the mouse hovers over a node, this node gets expanded so that the child nodes become visible and dropping on them is possible.

How can this be done?

Regards Philipp

Hi Philipp,

I am facing similar issue, Could you please let me know if you have a solution to this issue.
I am currently working on Vaddin 8 version.