Hi,

NestedTree utilizes its hierarchical markup to update the expanded branch only. This is not possible with a tabular markup.

Either you
- use NestedTree if you don't need columns and get partial updates for free
- use TableTree because of needed columns and live with complete updates (similar to changes of sorting order in a DataTable) - or invent a solution that replicates the magic of the old (deprecated) tree implementation (it was able to update a subset or rows with a lot of specialized rendering code)

Have fun
Sven


On 26.08.2015 21:20, Ephraim Rosenfeld wrote:
Hello Everyone:

I am looking for a way to leverage the 
TableTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html>
 component while getting the Ajax updating behavior of the 
NestedTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/NestedTree.html>
 component.

The following 
post<http://stackoverflow.com/questions/19790545/stop-wicket-from-repainting-the-whole-page-after-each-ajax-call/19806978#19806978>
 states that when using a 
TableTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html>,
 the 
TableTree#updateBranch<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html#updateBranch(T,%20org.apache.wicket.ajax.AjaxRequestTarget)>
 causes the entire table to be updated when expanding a node. In contrast, the 
NestedTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/NestedTree.html>
 component overrides the 
updateBranch<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/NestedTree.html#updateBranch(T,%20org.apache.wicket.ajax.AjaxRequestTarget)>
 method so that the table will appear with the sub-nodes expanded without having to refresh the entire table 
when expanding a node.

If I try to override the 
TableTree#updateBranch<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html#updateBranch(T,%20org.apache.wicket.ajax.AjaxRequestTarget)>
  with the same type of Visitor functionality in the 
NestedTree#updateBranch<https://github.com/apache/wicket/blob/master/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/repeater/tree/NestedTree.java>
 method  to add back only the Item or RowItem component when the node is expanded, only the 
parent node appears with the expanded icon, but the sub-node does not appear.  This makes sense 
because the 
TableTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html>
 component presents sub-nodes as new rows in the table.

Is it possible to override the behavior of the 
TableTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/TableTree.html>
 component such that the entire table need not be updated when expanding a node? Or am I 
better off using the 
NestedTree<https://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/extensions/markup/html/repeater/tree/NestedTree.html>
 component?

Thank you in advance,

- Ephraim




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