Tree Drill Down

Question

Hello,
I have been following this tutorial: http://thepeninsulasedge.com/frank_nimphius/2008/05/02/adf-faces-adf-faces-tree-drilldown-example/
To get my links on my tree to work. I'm using the first method he describes.
I understand everything except the part where he mentions a managed bean:
"Next step is to create a binding of the tree component to a managed bean. The binding is used later to detect the depth of the tree, which is important for the command link to access the right setCurrentRowsWithKey action."
I don't understand how to do this, and once I make a managed bean he doesn't decribe any way to get it to store the depth of the tree.
Can anybody help explain this to me?
Thanks,
Nelson

Answer 1

Just to clarify the binding issue - you didn't do what I meant.
Click the tree component in the structure pane - now the property inspector (ctrl+shift+i) window will list properties of the tree. You'll find a property called binding there.
You can also assign this in code:
                  <af:tree value="#{bindings.RegionsCountries.treeModel}"
                           var="node" binding="#{faa.tree}"
                           partialTriggers="navList1">(Here the tree is associated with the backing bean called faa and the object tree in there.)
The tree component automatically tracks depth for you. And you can access it with a simple expression language.
For example this EL will return true or false depending if the tree level is 1 or not.
"#{beanname.tree.depth!=1}"