Finding proper help on Hierarchical Trees

Have spent a couple of hours trying to navigate the sprawling website of oracle.com with the purpose finding and then downloading the appropriate help file. I downloaded
Oracle9i Developer Suite Release 2 Documentation Library
from
http://www.oracle.com/technology/documentation/ids.html
Its about 130Mb, installed it, but could i find comprehensive documentation on using Forms 9i (in particular Hierarchical Trees) no, but everything else it seemed yes. The original doc that pre-installed with the 9i DS 'online help' is reasonably helpful but like some others on this forum I could not find proper help on how to use Hierarchical Trees all i could find was few descriptive portions of text and believe me i have looked.
Others have said they found examples of Hierarchical Trees usage i can only assume they are using 10g. So this is a desperate plea to you. Can you point me to an online resource that deals with Hierarchical Trees in Forms 9i (intro, usage, examples, etc). If you can i would deeply appreciate it.
Mr Frustrated :)

Hi,
You have a lot of sample With the Forms Help.
If you search in the index with "htree."
The command hierarchical tree complete list appear.
L.

Similar Messages

Searching Hierarchical tree using Find tree node

In hierarchical tree using find_tree_node when i search the value it is taking the search value as a string and returns the node that of previous node value. for example
Suppose when i am searching for node value 18 ,but it takes the some other node value of (1883).
The tree structure is
1
2
1883
3
18
The code used is
p_node := ftree.get_tree_node_property ('tree_block.tree',:system.trigger_node,ftree.node_value);
current_node := Ftree.Find_Tree_Node(htree,
     p_node,
     Ftree.FIND_NEXT,
     Ftree.NODE_VALUE,
     Ftree.ROOT_NODE,
          Ftree.ROOT_NODE);

Hi!
You can use your restricting subquery in a start with clause. Something like
start with node_parent is null and some_field in (select ...)
Or you can eliminate the join and use where clause.
Hope this helps.
Sergey.

Problem when selecting child node in Hierarchical Tree

I have a hierarchical tree on a form populated thru a table query(form1). When I click on a child node, it opens form2 which contains a tab canvas. After closing forms, I return to the form1(containing Tree). At this point If I want to click on the same child node, I should be able to open form2 again. This doesn't happen.
I have the following code in my When-Tree-node_selected trigger:
Declare
htree item;
vnode_label varchar2(50);
node_clicked FTREE.NODE;
vnode_value number;
vnode_depth number;
v_type number;
v_value varchar2(100);
v_form_name varchar2(100);
v_alert_return number;
begin
-- Find the tree itself.
htree := FIND_ITEM('tree_block.tree');
node_clicked := :SYSTEM.TRIGGER_NODE;
vnode_value := FTREE.NODE_label;
-- Find the value of the node clicked on.
vnode_label := FTREE.GET_TREE_NODE_PROPERTY (htree,:SYSTEM.TRIGGER_NODE,FTREE.NODE_label);
vnode_depth := to_number(ftree.get_tree_node_property(htree,:SYSTEM.TRIGGER_NODE,ftree.Node_depth));
--Open form for node selected on tree and/or specific tab page
if vnode_depth <> 1 then
if :system.trigger_node_selected = 'TRUE' then CASE vnode_label
WHEN 'Personal' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
WHEN 'Citizenship' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
WHEN 'Emergency Contact' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
if id_null(Find_form(v_form_name)) then
open_form(:global.application_path || v_form_name,ACTIVATE,NO_SESSION,SHARE_LIBRARY_DATA);
else
go_form(v_form_name);
end if;
END IF;
elsif vnode_depth = 1 then
if :system.trigger_node_SELECTED = 'TRUE' then CASE vnode_label
WHEN 'EMPLOYEE INFO' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
vnode_label := 'Personal';
WHEN 'REPORTS' then
v_form_name :='HR_REPORTS';
vnode_label := '';
if id_null(Find_form(v_form_name)) then
v_form_name := :global.application_path || v_form_name;
open_form(v_form_name,ACTIVATE,NO_SESSION,SHARE_LIBRARY_DATA);--,p_list);
else
go_form(v_form_name);
end if;
end if;
end;
Can anyone please help me? I don't want the user to double click. They should only click once.
Thanks,
Mercedes

Right clicking does not change the current selection. The tree has no way to report what node was right clicked. Only work around is to left click the node you wish then right click it.
--pat

Hierarchical Tree and keyboard navigation

Does anyone know how to use Hierarchical Trees with keyboards, or to disable keyboard actions? (forms 9.0.4)
My form has a tree which does processing in a When-Tree-Node-Selected trigger to populate some blocks depending on the selected node. If the user selects nodes with the mouse then all is fine, but if they move between nodes with the keyboard then the processing for each selected node is only run the next time a node is selected with the mouse. This means the data for each node will flash up in the blocks for a split second when the mouse is next used.
I've tried Key-Up/Key-Down triggers to prevent keyboard navigation, but they don't fire. Setting Keyboard Navigable to false doesn't fix it either.
Using the When-Tree-Node-Activated trigger doesn't help. The online help says this trigger fires when the user presses Enter or double-clicks a node. I find that each node for which Enter was pressed is processed only when the user next double-clicks a node, and the node they double-click is not processed.
Tree Query:select 1, level, ename, null, null
from scott.emp
connect by prior empno = mgr
start with mgr is NULLWhen-New-Form-Instance:ftree.populate_tree('B.T');When-Tree-Node-Selected (1st and 4th lines commented out when changed to WTNA trigger):if :system.trigger_node_selected = 'TRUE' then
message(ftree.get_tree_node_property(
'B.T',:system.trigger_node,ftree.node_label));
pause;
end if;

Hi James,
We have got the same problem, after searching Metalink I found that this is a known bug. See Metalink Bug no 4565623 (base bug 4509399).
Sjoerd

Hierarchical Tree cannot populate

Hi all senior and expert,
Im new in oracle forms 10g and now im trying to develop system using hierarchical tree,but when im run for testing my tree cannot populate..Please help me...
My program Units:
PROCEDURE run_tree IS
BEGIN
DECLARE
htree ITEM;
v_ignore NUMBER;
rg_emps RECORDGROUP;
a varchar2(300):=' ';
startmenu varchar2(100):=' ';
node FTREE.NODE;
state varchar2(100):=' ';
cursor aa is
select distinct menu_name from menu_master_user
where nvl(FORM_NAME,' ') = ' '
and user_key = :global.user_key
and nvl(menu_name,' ') <> ' '
and seq <> 0;
BEGIN
-- Find the tree itself.
htree := Find_Item('tree4');
-- Check for the existence of the record group.
rg_emps := Find_Group('menu');
IF NOT Id_Null(rg_emps) THEN
DELETE_GROUP(rg_emps);
END IF;
BEGIN
select distinct menu_name into startmenu from menu_master_user
where user_key = :global.user_key
and seq=0;
EXCEPTION
     WHEN NO_DATA_FOUND THEN
     MESSAGE ('This user has no accessible item setup in the user access module,Please report to CICT for accessible...');
     MESSAGE ('This user has no accessible item setup in the user access module,Please report to CICT for accessible...');
     raise form_trigger_failure;
end ;
rg_emps := Create_Group_From_Query('menu',
'select 1,level,menu_name,:global.drive||icon_file,form_name
from menu_master_user where user_key='''||:global.user_key||
''' connect by prior menu_name=root_menu and user_key='''||:global.user_key||
''' and acc=''Y''
start with menu_name='''||startmenu||''' and user_key='''||:global.user_key||
''' order by seq');
a:='select 1,level,menu_name,:global.drive||icon_file,form_name
from menu_master_user where user_key='''||:global.user_key||
''' connect by prior menu_name=root_menu and user_key='''||:global.user_key||
''' and acc=''Y'' start with menu_name='''||startmenu||''' and user_key='''||:global.user_key||
''' order by seq';
-- Populate the record group with data.
v_ignore := Populate_Group(rg_emps);
-- Transfer the data from the record group to the hierarchical
-- tree and cause it to display.
Ftree.Set_Tree_Property(htree, Ftree.RECORD_GROUP, rg_emps);
-- Find the tree itself.
htree := Find_Item('tree4');
-- Find the root node of the tree.
--node := Ftree.Find_Tree_Node(htree,'Setup');
-- Loop through all nodes and expand each one if it is collapsed.
for aaa in aa loop
     node := Ftree.Find_Tree_Node(htree,aaa.menu_name);
IF NOT Ftree.ID_NULL(node) then
state := Ftree.Get_Tree_Node_Property(htree, node, Ftree.NODE_STATE);
IF state = Ftree.EXPANDED_NODE THEN
Ftree.Set_Tree_Node_Property(htree, node, Ftree.NODE_STATE, Ftree.COLLAPSED_NODE);
END IF;
end if;
END LOOP;
END;
END;
Any solutions or my code is wrong?
Edited by: 995252 on Mar 21, 2013 12:17 AM

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Lets start with some of the basics. What is your Forms version, Client OS version; if web deployed, your browser and Java versions and any error messages you might be receiving.
Craig...

Call forms and reports from a hierarchical tree node.

Hello,
I am new in pl/sql programming and I have some dificulties. I have created a hierarchical tree, in order to use it as a menu in an application that I am trying to develope. The problem is that I do not know how can I make the last nodes to be either a form or a report and when somebody double clicks on these nodes the form or the report will run. What is more, should I use the when-tree-node-selected trigger or the when-tree-node-activated?
Thank you in advance,
Vag

Hi ,
In Oracle Forms , a hierarchical tree is developed through the use of a sql statement and column which defines the order of leaves...
Visit the on-line help of Forms10g to find out the details , and the triggers as well...
Something else...post this question to Oracle Forms to get more detailed answer...
Regards,
Simon

Scroll Event on a hierarchical tree

Is it possible to intercept a scroll event on a hierarchical
tree item, and how much the tree has been scrolled?
many thanks in advance,
Michele Pantaleo
null

Hello,
I was able to reproduce your issue fast.I was able, also to find a solution to your issue, solution that came after performing several tests.
What i found out:
--the expansion begins from root and ends with the last leaf.That is why the scroll bar stays at the bottom.
--if you click on leaf node and then click expansion(which after the while loop has the following code:
node := Ftree.Find_Tree_Node(htree, '');
Ftree.Set_Tree_Selection(htree, node, Ftree.SELECT_ON);)
it will work to achieve what you want.
Here is the full procedure for the expanded tree that lets the scroll bar at the top:
PROCEDURE explose_tree IS
node ftree.node;
htree ITEM;
state varchar2(30);
state1 varchar2(30);
BEGIN
-- Search the tree identifiant --
htree := Find_Item('block2.tree4');
-- Search the root --
     node := Ftree.Find_Tree_Node(htree, '');
     --Ftree.Set_Tree_Selection(htree, node, Ftree.SELECT_ON);
-- Expand all nodes --
WHILE NOT Ftree.ID_NULL(node) LOOP
state := Ftree.Get_Tree_Node_Property(htree, node, Ftree.NODE_STATE);
IF state = Ftree.COLLAPSED_NODE THEN
Ftree.Set_Tree_Node_Property(htree, node, Ftree.NODE_STATE, Ftree.EXPANDED_NODE);
elsIF state = Ftree.LEAF_NODE then --this is the key that help to solve your problem
     Ftree.Set_Tree_Selection(htree, node, Ftree.SELECT_ON);
END IF;
node := Ftree.Find_Tree_Node(htree, '', ftree.find_NEXT,Ftree.NODE_LABEL,'', node);
END LOOP;
-- Now go the root --
     node := Ftree.Find_Tree_Node(htree, '');
--you need to select the root, otherwise the scroll bar will be at the bottom
Ftree.Set_Tree_Selection(htree, node, Ftree.SELECT_ON);
end;
Regards,
Alex

About hierarchical trees

Dear Oracle forum,
I would be greatful if anyone could help me with this problem:
For the first time i installed forms6i and used the HIERAARCHICAL item called htree3
and In NEW_FORMS_INSTANCE include the code below
DECLARE
htree ITEM;
v_ignore NUMBER;
rg_emps RECORDGROUP;
BEGIN
/* Window controls */
set_window_property(forms_mdi_window,window_state,maximize);
set_window_property(forms_mdi_window,title,' Oraganization');
-- Find the tree itself.
htree := Find_Item('tree_block.htree3');
-- Check for the existence of the record group.
rg_emps := Find_Group('emps');
IF NOT Id_Null(rg_emps) THEN
DELETE_GROUP(rg_emps);
END IF;
-- Create the record group.
rg_emps := Create_Group_From_Query('rg_emps',
'select 1, level, ename, NULL, to_char(empno) ' | |
'from emp ' | |
'connect by prior empno = mgr ' | |
'start with job = ''PRESIDENT''');
-- Populate the record group with data.
v_ignore := Populate_Group(rg_emps);
-- Transfer the data from the record group to the hierarchical
-- tree and cause it to display.
Ftree.Set_Tree_Property(htree, Ftree.RECORD_GROUP, rg_emps);
END;
code work properly, but when I click anywhere in the tree, I am getting following internal error.(Anyway Visual c++ is not installed in my pc.
Error what am i getting is
- Assertion failed
program: E:\forms6i\bin\FDBG60.exe
file e:\f994w32\src\if\iff\ifztma.c
line 607
Please help me
Thanks
Chandana
null

Now my requirement is that before populating tree
item i want to clean up the tree item,if any other
soln. plz sugg.
POPULATE_TREE Built-in: Description
Clears out any data already in the hierarchical tree,
and obtains the data set specified by the RecordGroup
or QueryText properties.

Colourful Hierarchical Tree

Hi,
This is the first thread am posting. I searched ur discussions for "How to show the hierarchical tree in forms 10g with different colours and in different fonts weigth for different nodes". But i found nothing.
Hopefully looking forward for your replies.

You should use a less specific search string if you don't find anything first time but in this case it won't have helped you.
You can set an icon for each node in the tree, which might be an acceptable alternative to writing lots of java.
The icon can be set as a property
http://www.oracle.com/webapps/online-help/forms/10g/topics/f1_help/builts/set_tree_node_property_built_in.html?tp=true
or it can be built into the select statement that creates the tree (if your tree is query-driven).

Compiling error in Hierarchical Tree !!!!! Urgent attention!!!

I have made the Hierarchical Tree as described in the resuable demo help as is but when ever i try to compile the form i gets error on the navigator."anything!". I guess the forms are not able to find the navigator package. I have attached the navigator.pll. I think there is nothing mroe to attach to a form
Till now i have searched every documentation on the net and the files ships wiht DEV 6.0.5.2. But not ablet o find any thing regarding the installation of navigator package :( Is there any one can tell me how u remover the compiling error from the form which is dur to the navigator package!!!!
null

If you are using DEV 6.0.5.2 you should use the FTREE built-in package. Look under the Built-In package node. The Navigator.pll was a demo used in Forms4.5 before there was a hierarchial tree item type.
Thanks,
Candace Stover
Forms Product Management

Hierarchical tree and interacting with data block

I have a hierarchical tree that is used to pick records that are shown in another data block. I have a list item in the data block that changes the arrangement of nodes in the hierarchy. My problem is that after the update, I select the node, but the wrong data shows up in the other data block (eg. node x is selected, x becomes a child of y, the data for y still appears in the data block even though node x is selected in the tree). There seems to be something wrong with my triggers, but I can't figure out what.
Here are the triggers that I am using.
In the tree block, tree item:
-WHEN-TREE-NODE-SELECTED
set_block_property(v_data_block, default_where, 'global_id = ' | | v_org);
go_block(v_data_block);
execute_query;
In the data block, list item
-WHEN-LIST-CHANGED:
-- find the tree node and select it
node := Ftree.Find_Tree_Node(...)
Ftree.set_tree_selection(v_tree,node,Ftree.SELECT_ON);
-- update the data block to show data from the selected node
set_block_property('GREENPAGES_DIR', default_where, 'global_id = ' | | :greenpages_dir.global_id);
go_block('GREENPAGES_DIR');
execute_query;
Thanks for your help.

hi
i didn't try doing it.. i assume the the reasons can be:
1.check the value of the variable 'v_org' because 'w-t-n-s' trigger fires twice..
2. 'w-t-n-s' trigger is not firing eventhough u select it through ur code in the list item trigger.. if not firing, use execute_trigger('w-t-n-s') and remove the last set of code (update section) from the list item trigger..(assuming 'GREENPAGES_DIR' = v_data_block)
hope this helps u
ajith

Need Simple Hierarchical Tree Example

Can someone e-mail me a simple, working hierarchical tree example, along with what tables i need to insert into the database? Like the car/airplane example, or employee/department example.
I tried following the instructions in the Introduction to Hierarchical Tree example from metalink, but the tree still does not display on my form, even though the data query is valid. Nothing happens when i click the button.
I need this pretty urgently, so any help will be appreciated! Thanks! My e-mail is [email protected]

Thats what i don't understand, you see. There is no query error. I know when there is, because when i type the query wrongly, the error prompts. However, when the query is correct, nothing happens. When i go through in debug mode, it does enter the statement to populate the tree. This is my record group/data query(i tried putting it in both) :
SELECT initial_level
,node_depth
,node_label
,node_icon
,node_data
FROM MyTreeData
START WITH node_parent IS NULL
CONNECT BY node_parent = prior node_data
This is my populate tree code :
DECLARE
     htree ITEM;
     top_node FTREE.NODE;
     find_node FTREE.NODE;
BEGIN
     -- Find the tree itself.
     htree := FIND_ITEM('mytreeblock.mytree');
     -- Populate the tree with data.
     ftree.Populate_Tree(htree);
END;
This is the format of data in the database :
initial_level node_depth node_label node_icon node_data node_parent
-1 2 Car Null CAR TRANSPORT
-1 2 Plane Null PLANE TRANSPORT
0 2 Bike NULL BIKE TRANSPORT
1 1 Transport NULL TRANSPORT
0 3 Honda NULL HONDA CAR
0 3 Boeing 747 NULL 747-400 PLANE
0 3 Mazda NULL MAZDA CAR
I hope its not a problem with my Forms program, so i'm hoping that someone can e-mail me a working one to see. I've been reading up on this for a few days already, but i do not know why its not working.
Thanks for your help again, Kevin! I really appreciate it.

Can i have a check box in the hierarchical tree in the icons place, urgent!!! please

Hi,
I'am working on the Hierarchical Tree structure which should have three levels, I need to have a check box in the place of the icon & if i select a node that node & the child nodes should get selected.
After this when i say move selected ( i'am trying to use picklist class also) the entire checked tree has to move to the display area to the right & should display as tree structure & after this if i save then the checked records which are moved to another text area should get saved!!
How to achieve this? I have the tree structure ready but the check box part is the worrying factor! & then moving the checked records to the right using picklist class is the second problem & finally saving records to database.
Any help in this regard will be deeply appreciated:)
If check box is not possible then i will have to look at other methods, will the tree structure allow checkboxes????
Thanks
Mahesh

No the tree will not allow checkboxes

How to go to a particular node in a hierarchical tree?

I want to do this simple thing with a Forms hierarchical tree.
Since tree has lots of levels and branches I want to give a search box.
User types the label and press a button. The form then has to query the tree node and expand ONLY the path where the node is (if found) and highlight it. If a node with a label is NOT found I give an error message to the user.
I got hold of a code segment to explode a tree and modified it, but it does not work. The entire tree is expanded and you don't know where you are.
Any help will be greatly appreciated?
PROCEDURE Expand_All_Nodes_in_Tree IS
     node ftree.node;
     htree ITEM;
     state varchar2(30);
BEGIN
     -- Search the tree identifiant --
     htree := Find_Item('menu.tree');
     -- Search the root --
     node := Ftree.Find_Tree_Node(htree, '');
     -- Expand all nodes --
     WHILE NOT Ftree.ID_NULL(node) LOOP
     state := Ftree.Get_Tree_Node_Property(htree, node, Ftree.NODE_STATE);
     IF state = Ftree.COLLAPSED_NODE THEN
     Ftree.Set_Tree_Node_Property(htree, node, Ftree.NODE_STATE, Ftree.EXPANDED_NODE);
     END IF;
     node := Ftree.Find_Tree_Node(htree, '', ftree.find_NEXT,Ftree.NODE_LABEL,'', node);
IF Ftree.Get_Tree_Node_Property(htree, node, Ftree.NODE_LABEL) = :ctrl.node_lable_to_search THEN
EXIT;
END IF;
     END LOOP;
END;

Hi Channa,
Try this code with you tree i am using the same situation and this code is working perfect with me.
PROCEDURE find_node_in_tree(search_string varchar2, find_type varchar2) IS
htree ITEM;
search_start_node ftree.node;
find_node ftree.node;
BEGIN
htree := Find_Item('blk_tree.main_tree');
     search_start_node := nvl(ftree.get_tree_selection(htree,1),ftree.root_node);
     find_node := ftree.find_tree_node(htree,upper(search_string)||'%',ftree.find_next,ftree.node_label,ftree.root_node,search_start_node-1);
     if find_node = 0 then
          find_node := 1;
end if;
Ftree.Set_Tree_selection(htree, find_node, Ftree.SELECT_ON);
exception
     when others then
          NULL;
END;
-Ammad

URGENT *** Hierarchical Tree in Forms 9i *** URGENT

Hello everybody,
for my company I need to build a hierarchical tree item, that will display static data over three levels. Let's say: departments, employees and employee projects.
How do I fill the Item?
When do I fill the Item?
Where do I fill the Item?
What are the elements of the SQL query, that fills the hierarchical tree?
Any help will be appreciated
[email protected]

Note:210663.1 helped a bit.
I used the database column as the third element in the select part and put NULL as the fifth element. Then it worked.
Now I am looking for the way to add the employees, when the user selects / activates a department node.

Finding proper help on Hierarchical Trees

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