QTreeWidget drag and drop

Hello, i have 2 qtreewidgets on my form.
I need to make d&d from first to second qtreewidget

for first i set dragDropMode -> dragOnly
for second i set dragDropMode -> dropOnly and defaultDropActrion -> CopyAction

but, i have 1 problem.
only 1 qtreewidgetitem is copied, without hierarchy (w/0 child items)

How can i fix this?

Can you show the code you are working with now, stripped down to the minimal starting kernel?

this?
Attachment 10419

I can't copy branch "4" with hierarchy

up

nobody can't help me?

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(10 symbols)

up
(10 symbols)