I'm using Apex 4.2.6 (with theme 26) and I build a tree region with this simple connect by query, as instructed by Apex documentation:
select case when connect_by_isleaf = 1 then 0
when level = 1 then 1
else -1
end as status,
level,
"PREFERENCIA" as title,
null as icon,
"ID" as value,
null as tooltip,
'f?p=&APP_ID.:90006:'||:APP_SESSION||'::::P90006_ID:'||"ID" as link
from "#OWNER#"."PREF_CLIENTES"
start with "ID_PAI" is null
connect by prior "ID" = "ID_PAI"
order siblings by "PREFERENCIA"
But when the page is show in browser, the tree region does not display the little triangles that allow click to expand/contract a single tree node. This is how the tree is rendered by Apex:
I only can expand or contract all tree nodes, because the individual triangles to expand/contract an specific node are not show. I want my tree to be like this:
What I am doing wrong? How can I display those little black/white triangles to expand/contract a specific node on tree?
Thanks in advance!