How to get the first visible row in a tree view?

[David Rosal <david rosal upf edu>]

Hi.

I have a scrollable tree view with a list of filenames, and I want to 
know which filename appears in the row at the top of the visible part of 
the tree view. I'll use this information later to restore the scrolling 
status of the tree view.

The question is: is there any way to know the contents of the first 
visible row in a tree view?

Thanks.

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David Rosal
<david rosal upf edu>
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