How to create a Child node in Tree object

Hi All,
I have a thought to create a tree with a child object, that the child can able to create through by right click the parent tree having the options to create or delete the child objects.Please Suggest me if there is an possible way.
Thanks
Gopinath

Look at sample programm BCALV_TREE_DEMO,
and especially at the methods ADD_NODE or DELETE_SUBTREE of class CL_GUI_ALV_TREE.
For implementing the context menu, consider event ITEM_CONTEXT_MENU_REQUEST.
Regards,
Ulrich

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Hi Friends,
How to get Text for nodes in Tree Structure
REPORT YFIIN_REP_TREE_STRUCTURE no standard page heading.
                   I N I T I A L I Z A T I O N
INITIALIZATION.
AUTHORITY-CHECK OBJECT 'ZPRCHK_NEW' :
                  ID 'YFIINICD' FIELD SY-TCODE.
IF SY-SUBRC NE 0.
    MESSAGE I000(yFI02) with SY-TCODE .
    LEAVE PROGRAM.
ENDIF.
class screen_init definition create private.
Public section
public section.
    class-methods init_screen.
    methods constructor.
Private section
private section.
    data: container1 type ref to cl_gui_custom_container,
          container2 type ref to cl_gui_custom_container,
          tree type ref to cl_gui_simple_tree.
    methods: fill_tree.
endclass.
Class for Handling Events
class screen_handler definition.
Public section
public section.
    methods: constructor importing container
               type ref to cl_gui_custom_container,
             handle_node_double_click
               for event node_double_click
               of cl_gui_simple_tree
               importing node_key .
Private section
private section.
endclass.
*&                        Classes implementation
class screen_init implementation.
*&                        Method INIT_SCREEN
method init_screen.
    data screen type ref to screen_init.
    create object screen.
endmethod.
*&                        Method CONSTRUCTOR
method constructor.
    data: events type cntl_simple_events,
          event like line of events,
          event_handler type ref to screen_handler.
    create object: container1 exporting container_name = 'CUSTOM_1',
                   tree exporting parent = container1
                     node_selection_mode =
            cl_gui_simple_tree=>node_sel_mode_multiple.
    create object: container2 exporting container_name = 'CUSTOM_2',
    event_handler exporting container = container2.
event-eventid = cl_gui_simple_tree=>eventid_node_double_click.
    event-appl_event = ' '.   "system event, does not trigger PAI
    append event to events.
    call method tree->set_registered_events
         exporting events = events.
    set handler event_handler->handle_node_double_click for tree.
     call method: me->fill_tree.
endmethod.
*&                        Method FILL_TREE
method fill_tree.
    data: node_table type table of abdemonode,
          node type abdemonode.
types:    begin of tree_node,
          folder(50) type c,
          tcode(60) type c,
          tcode1(60) type c,
          tcode2(60) type c,
          text(60) type c,
          text1(60) type c,
          text2(60) type c,
          end of tree_node.
data: wa_tree_node type tree_node,
            t_tree_node type table of tree_node.
wa_tree_node-folder = text-001.
wa_tree_node-tcode = text-002.
wa_tree_node-text = 'Creditors ageing'.
wa_tree_node-tcode1 = text-003.
wa_tree_node-text1 = 'GR/IR aging'.
wa_tree_node-tcode2 = text-004.
wa_tree_node-text2 = 'Bank Balance'.
append wa_tree_node to t_tree_node.
clear wa_tree_node .
wa_tree_node-folder = text-005.
wa_tree_node-tcode = text-006.
wa_tree_node-text = 'Creditors ageing'.
wa_tree_node-tcode1 = text-007.
wa_tree_node-text1 = 'Creditors ageing'.
wa_tree_node-tcode2 = text-008.
wa_tree_node-text2 = 'Creditors ageing'.
append wa_tree_node to t_tree_node.
clear wa_tree_node .
wa_tree_node-folder = text-009.
wa_tree_node-tcode = text-010.
wa_tree_node-text = 'Creditors ageing'.
wa_tree_node-tcode1 = text-011.
wa_tree_node-text1 = 'Creditors ageing'.
wa_tree_node-tcode2 = text-012.
wa_tree_node-text2 = 'Creditors ageing'.
append wa_tree_node to t_tree_node.
clear wa_tree_node .
node-hidden = ' '.                 " All nodes are visible,
    node-disabled = ' '.               " selectable,
    node-isfolder = 'X'.                                    " a folder,
    node-expander = ' '.               " have no '+' sign forexpansion.
    loop at t_tree_node into wa_tree_node.
      at new folder.
        node-isfolder = 'X'.                      " a folder,
        node-node_key = wa_tree_node-folder.
               clear node-relatkey.
        clear node-relatship.
        node-text = wa_tree_node-folder.
        node-n_image =   ' '.
        node-exp_image = ' '.
        append node to node_table.
      endat.
     at new tcode .
        node-isfolder = ' '.                          " a folder,
        node-n_image =   '@CS@'.       "AV is the internal code
        node-exp_image = '@CS@'.       "for an airplane icon
        node-node_key = wa_tree_node-tcode.
         node-text = wa_tree_node-text .
                 node-relatkey = wa_tree_node-folder.
        node-relatship = cl_gui_simple_tree=>relat_last_child.
      endat.
      append node to node_table.
    at new tcode1 .
        node-isfolder = ' '.                          " a folder,
        node-n_image =   '@CS@'.       "AV is the internal code
        node-exp_image = '@CS@'.       "for an airplane icon
        node-node_key = wa_tree_node-tcode1.
                 node-relatkey = wa_tree_node-folder.
        node-relatship = cl_gui_simple_tree=>relat_last_child.
          node-text = wa_tree_node-text1.
     endat.
      append node to node_table.
       at new tcode2 .
        node-isfolder = ' '.                          " a folder,
        node-n_image =   '@CS@'.       "AV is the internal code
        node-exp_image = '@CS@'.       "for an airplane icon
        node-node_key = wa_tree_node-tcode2.
                 node-relatkey = wa_tree_node-folder.
        node-relatship = cl_gui_simple_tree=>relat_last_child.
        node-text = wa_tree_node-text2.
     endat.
      append node to node_table.
    endloop.
    call method tree->add_nodes
         exporting table_structure_name = 'ABDEMONODE'
                   node_table = node_table.
endmethod.
endclass.
*&                        Class implementation
class screen_handler implementation.
*&                        Method CONSTRUCTOR
method constructor.
   create object: HTML_VIEWER exporting PARENT = CONTAINER,
                  LIST_VIEWER exporting I_PARENT = CONTAINER.
endmethod.
*&                 Method HANDLE_NODE_DOUBLE_CLICK
method handle_node_double_click.
case node_key(12).
when 'Creditors'.
submit YFIIN_REP_CREADITORS_AGING via selection-screen and return.
when 'Vendor'.
submit YFIIN_REP_VENDOR_OUTSTANDING via selection-screen and return.
when 'Customer'.
submit YFIIN_REP_CUSTOMER_OUTSTANDING via selection-screen and
return.
when 'GR/IR'.
submit YFIIN_REP_GRIR_AGING via selection-screen and return.
when 'Acc_Doc_List'.
submit YFIIN_REP_ACCOUNTINGDOCLIST via selection-screen and return.
when 'Bank Bal'.
submit YFIIN_REP_BANKBALANCE via selection-screen and return.
when 'Ven_Cus_Dtl'.
submit YFIIN_REP_VENDORCUST_DETAIL via selection-screen and return.
when 'G/L_Open_Bal'.
submit YFIIN_REP_OPENINGBALANCE via selection-screen and return.
when 'Usr_Authn'.
submit YFIIN_REP_USERAUTHRIZATION via selection-screen and return.
endcase.
endmethod.
endclass.
Program execution ************************************************
load-of-program.
call screen 9001.
at selection-screen.
Dialog Modules PBO
*&      Module STATUS_9001 OUTPUT
      text
module status_9001 output.
set pf-status 'SCREEN_9001'.
set titlebar 'TIT_9001'.
call method screen_init=>init_screen.
endmodule.                 " STATUS_9001 OUTPUT
Dialog Modules PAI
*&      Module USER_COMMAND_9001 INPUT
      text
module user_command_9001 input.
endmodule.                 " USER_COMMAND_9001 INPUT
*&      Module exit_9001 INPUT
      text
module exit_9001 input.
case sy-ucomm.
when 'EXIT'.
set screen 0.
endcase.
endmodule.
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you can read the table node_table with nody key value which imports when docubble click the the tree node (Double clifk event).
Regards,
Gopi .
Reward points if helpfull.

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This is an Oracle forum. If you're not iusing Oracle, make that clear. Always say what version of your softwate you're using, whether it's Oracle or anything else.
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It looks like you're using the Nested Sets technique for modeling a tree. To get the parents of given nodes, do something like this:
SELECT parent.category_name
, node.lft
, node.rgt
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785102 wrote:
Hello,
I tried to implement the solution as follow:
mysql> select parent.*
-> from category_subcategories as parent
-> having parent.lft =
-> (select max(parent.lft) from
-> (SELECT parent.category_name, parent.lft, parent.rgt
-> FROM category_subcategories AS node,
-> category_subcategories AS parent
-> WHERE node.lft > parent.lft AND node.lft < parent.rgt
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-> )
-> );
ERROR 1248 (42000): Every derived table must have its own alias
mysql>
But I got an error.
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Apparantly, in your system (unlike Oracle), every sub-query must have a name. Try something like this:
select parent.*
from category_subcategories as parent
having parent.lft = (
 select max(parent.lft)
 from (
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 WHERE node.lft > parent.lft
 AND node.lft < parent.rgt
 AND node.category_name = 'Sofa'
 ORDER BY parent.lft -- Is this a waste of effort?
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;What is the purpose of having the inner sub-query, the one I called got_name_lft_and_rgt?
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How to create a Child node in Tree object

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