Or you can use displayBlock: (and root: and children:) directly on the TreeModel.

�� tree := self newTree.

�� tree

roots: { root1 root2 };

displayBlock: [ :node | node label ];

childrenBlock: [ :node | node children ];

iconBlock: [ :node | node icon ].

I'm not sure if direct creation of TreeColumnModel/TreeNodeModel is advised considering TreeModel is trying to hide it.

Peter

On Thu, Jul 2, 2015 at 1:33 PM, Christophe Demarey <Christophe.Demarey@inria.fr> wrote:

Le 30 juin 2015 �� 16:01, Christophe Demarey a ��crit :

> Hi,
>
> I have a TreeModel with different kinds of TreeNodeModel and I would like to get a customizable display string depending on the node type.
> It looks like it is not possible to dispatch on nodes in a display block because it only takes the item (node content) and the tree as parameter.
> It is strange as I expect that to be a standard feature. Do I miss something?

I found a workaround and it looks like a missing feature in Spec TreeModel.
You can customize the display by settings columns on the tree like this:

self newTree
�� columns: { TreeColumnModel new
�� displayBlock: [:node | node label ] };