WDA: Tree structure in web dynpro for ABAP

Question

Hi,
I am trying to build a tree structure with information something like the following:
Country
State
City
I used the UI Element "Tree" and I was successful in building it. The only problem is that it supports only one column in each row like name.
I need multiple columns in each row like Name and population.
1) Is there any solution for this using UI element "Tree" only?
2)I checked that there is Table tree UI element, but I could not figure out how I could use it for hierarchial structure like that of my requirement? Can I use it? Is there any example application with hierarchial structure?
3)For tree UI element, any node that is not directly below context node has to be non-singleton. It will lead to adverse performance. Is there any solution for this?
Thanks in advance.
Regards,
Srini.

Answer 1

Hi Srinivasa,
In the context, please create a node DATA with the following fields:
KEY type string
PARENT type string
LOCATION type string
POPULATION type string (or "I" if you happen to have numbers only without a unit like "k" for "thousand").
Then please create a table with a TreeByKeyTableColumn namde LOCATION and an additional TableColumn called POPULATION. Now please add a TextView cell editor to both and bind the text value of each of them to the attributes LOCATION and POPULATION of the context node DATA. Last step is to bind the attribtues rowKey and parentRowKey(?) to the KEY and the PARENT attributes. This concludes the design time part.
Next step is to fill the node DATA with actual data. Just use a supply function and do it like this:
First entry:
KEY = 'WORLD'.
PARENT = ''.
LOCATION = 'World'.
POPULATION = '4 billion'.
Second entry:
KEY = 'DE'.
PARENT = 'WORLD'.
LOCATION = 'Germany'.
POPULATION = '80 million'.
You should now see a table with a tree at the left column that looks like:
<pre>
  World        4 billion
   ->Germany   80 million
</pre>
Kind regards,
Thomas
Message was edited by: Thomas Szuecs