Tree Manipulation

Question

I have a help screen in my application which has a tree on the left and help verbiage on the right. The tree leafs/nodes correspond to the pages in my application. The help verbiage displayed depends on the leaf/node clicked on the tree (clicking on the leaf/node corresponding to page 12 displays help verbiage for page 12). I get to the help page by clicking on a help icon in a nav bar passing in the page I'm coming from and help for that page is displayed automatically.
The tree is built from a table which has the columns
PAGEID (PK)
PARENTPAGEID (FK)
PAGENAME
REFERSTOPAGE (the actual application page number of this page).
A couple of questions:
1. Is it possible to ensure only the branch which contains the page I'm coming from is expanded and all others collapsed when I go to the help page?
2. Once on the help page, is there a way to collapse all other branches when expanding one branch (branch 2 is open, expanding branch 3 causes branch 2 to collapse)?

Answer 1

Hi,
Here example of procedure of search on a tree
Procedure Tree_Find_Label(TLabel In Varchar2) Is
     find_node ftree.node;
     Begin
     find_node:= ftree.find_tree_node(B.Tree, TLabel, ftree.FIND_NEXT, ftree.Node_Label, ftree.ROOT_NODE, ftree.ROOT_NODE);
     if not ftree.id_null(find_node) then
          ftree.set_tree_selection(B.Tree, find_node, ftree.SELECT_ON);
          Go_Item(B.Tree);
          execute_trigger('WHEN-TREE-NODE-SELECTED'); -- Works correctly if Multi-Selection -No
     end if;
     end;