Hello List,

thank you for the helping.

I've tested the whole day along the ids and the behaviour is still the same.
They are different. <dtml-var id> proofs.
In the html-sourcecode I've seen 2 things:
1st: The Name of the Anchor is the same for each branch
2nd: The Href for all branches of one layer is exactly the same, but different from the other layers.

Layer 1:
<a name="Tm9uZQ==" href="show_html?tree-c=eJyLVneEAnf9ZFt1HQX1kFzL0qhAW1v1WABnawdT#Tm9uZQ==">

Layer 2:
<a name="Tm9uZQ==" href="show_html?tree-e=eJyLVneEAnf9ZFt1HQX1kFzL0qhAW1R2LADSHgqB#Tm9uZQ==">

The dtml-code now looks like:
<dtml-tree branches="getBranches">
    branch:
   id: <dtml-var id> <dtml-var title_or_id>
</dtml-tree>

And the Product-Code:
class StaticTestBranch(OFS.SimpleItem.Item, Persistent):
    def __init__(self, id, children):
        self.id = id
        self.children = children

    def getBranches(self):
        return self.children

    def getId(self):
        return self.id

class tstProd .

def getBranches(self):
     e1 = StaticTestBranch("e1", None)
     e2 = StaticTestBranch("e2", None)
     e3 = StaticTestBranch("e3", None)
     s1 = StaticTestBranch("s1", [e1, e2])
     s2 = StaticTestBranch("s2", [e3])
     v1 = StaticTestBranch("v1", [s1])
     v2 = StaticTestBranch("v2", [s2])
     branches = [v1, v2]
     return branches

Do you have an idea, what I still make wrong?

Again, many thanks in advance,
Ulla.

Dieter Maurer wrote:

Ulla Theiss wrote at 2005-3-7 12:41 +0100:

Now, I've derived my class TestBranch from "OFS.SimpleItem", which does 
have a method "getId()" and from "Persistent". The behaviour is much 
better and reproducible - but still not correct: Clicking on one 
plus-sign all the plus-signs of the chosen layer change to minus and are 
expanded, nevertheless the branch belongs to the chosen sign or not.


Now, you should give your objects different ids and you are
done...

When you do not set the id, it is ''. And such an id
is not differentiating (as you observe from your "dtml-tree").