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Subject: Re: How to use java.util.List backed tree structure with TreeView
From: Greg Brown <gk_brown@verizon.net>
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Date: Fri, 06 May 2011 08:16:06 -0400
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To: user@pivot.apache.org

If a node implements org.apache.pivot.collections.List, it is considered =
a branch. Otherwise, it is a leaf.

On May 6, 2011, at 8:06 AM, Edvin Syse wrote:

> ListAdapter was nice, thanks :)
>=20
> But how do I express what is supposed to be Leaf nodes and what to be =
Branch nodes?
>=20
> -- Edvin
>=20
> Den 06.05.2011 13:49, skrev Greg Brown:
>> Have you looked at org.apache.pivot.collections.adapter.ListAdapter? =
You might be able to use this in conjunction with TreeViewBranchListener =
to construct your tree nodes from your backing data structure on demand.
>>=20
>> G
>>=20
>>=20
>> On May 6, 2011, at 7:31 AM, Edvin Syse wrote:
>>=20
>>> I have a tree-structure represented by a list of domain objects. =
Some of the domain objects have a "children" property with a =
java.util.List of children. The TreeView#setTreeData method takes a =
org.apache.pivot.collections.List, and I figured I could do:
>>>=20
>>> setTreeData(new ArrayList(myJavaUtilListList.toArray()));
>>>=20
>>> This works so that I can see the first level of nodes, but I don't =
know how to express branch nodes. Also, I would like to lazy load some =
of the nodes. I think I need to use the TreeViewBranchListener somehow, =
but I can't find any documentation or examples.
>>>=20
>>> Do I need to wrap all my domain objects in TreeNodes or is there =
another way to do this?
>>>=20
>>> -- Edvin
>>=20