Sadly, it is not possible to use tree>>#displayBlock: directly because the tree is initialized with: columns := { TreeColumnModel new displayBlock: [:node | (self wrapItem: node content) ] } asValueHolder. TreeModel>>#wrapItem: anItem ^ displayBlock value cull: anItem cull: self As you can see, it is then impossible to get a reference to the node. You only get the node content and a reference to the tree itself. Le 2 juil. 2015 à 14:01, Peter Uhnák a écrit :

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 à 16:01, Christophe Demarey a écrit :

...

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 ] };