Extend CellTreeNodeView with header and footer components

Originally reported on Google Code with ID 5164

Found in GWT Release (e.g. 1.5.3, 1.6 RC):
GWT 2.1M2

Encountered on OS / Browser (e.g. WinXP, IE6-7, FF3):
All

Detailed description (please be as specific as possible):
The views for a CellTree node currently support an element to display "no data" and
another to display a "more" hyperlink when more elements are available.  It would be
nice for applications which use the CellTree as a navigation tool (like the Expenses
example) to be able to manage their own extensions, e.g. to add a "Manage" or "Create
New" hyperlink as footer of the node.
A header and footer DivElement that applications may access could be very helpful.

Workaround if you have one:
Maybe using some bad hack it would be possible to put a dummy element in the View and
have it rendered as hyperlink, but it would probably comprise the integrity of the
selection model.

Reported by de.angelis.marco on 2010-07-27 19:35:31

gwtproject / gwt

Extend CellTreeNodeView with header and footer components #5163