https://sourceforge.net/tracker/?func=detail&aid=1541162&group_id=152762&atid=785194

I think that the second most popular (major) widget
used in enterprise applications is the editable tree
(known as the hierarchical grid, or "hgrid" in Oracle UIX).

Here are some key features I'd like to propose to add
to ZK's tree element:
1) Pagination (e.g. display nodes 21-30)
2) Embedding images in a row
3) Optionally, a "Focus" feature, in which the user can
"zoom-into" a particular node, such that only that node
and its children are shown... (this is especially
useful in large datasets)

FYI:
http://www.oracle.com/technology/tech/blaf/specs/hgrid.html

Serouj