How to create tree structure in abap

Question

hi,
   I am mohan. Please send the how to create the tree structure. how to insert the child nodes in  root node. actually our requirement is we have list transaction codes. We are planning to put all transaction codes in tree level.
please tell me how to do the program in tree structure.

Answer 1

Hi Mohan,
Check the following program on ALV tree.
REPORT zalvtree.
CLASS cl_gui_column_tree DEFINITION LOAD.
CLASS cl_gui_cfw DEFINITION LOAD.
DATA: go_grid TYPE REF TO cl_gui_alv_grid.
DATA: ro_grid TYPE REF TO cl_gui_alv_grid.
DATA tree1  TYPE REF TO cl_gui_alv_tree.
DATA mr_toolbar TYPE REF TO cl_gui_toolbar.
DATA : gt_checked TYPE lvc_t_chit,
       gs_checked LIKE LINE OF gt_checked,
       l_part_key TYPE lvc_nkey,
       gt_node TYPE lvc_s_chit-nodekey.
INCLUDE <icon>.
INCLUDE zamit_alv_tree_toolbar_event.
INCLUDE zbcalv_tree_event_receiver.
*DATA: toolbar_event_receiver TYPE REF TO lcl_toolbar_event_receiver.
DATA: gt_sflight      TYPE sflight OCCURS 0,      "Output-Table
      gt_fieldcatalog TYPE lvc_t_fcat, "Fieldcatalog
      ok_code LIKE sy-ucomm.           "OK-Code
START-OF-SELECTION.
END-OF-SELECTION.
  CALL SCREEN 100.
*&      Module  PBO  OUTPUT
      process before output
MODULE pbo OUTPUT.
  SET PF-STATUS 'MAIN100'.
  IF tree1 IS INITIAL.
    PERFORM init_tree.
else.
              CALL METHOD me->refresh_table_display
                EXCEPTIONS
                  PROGRAM_ERROR = 1
                  others        = 2
              IF sy-subrc <> 0.
               MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
                          WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
              ENDIF.
  ENDIF.
  CALL METHOD cl_gui_cfw=>flush.
ENDMODULE.                             " PBO  OUTPUT
*&      Module  PAI  INPUT
      process after input
MODULE pai INPUT.
  CASE ok_code.
    WHEN 'EXIT' OR 'BACK' OR 'CANC'.
      PERFORM exit_program.
*mrk
    WHEN 'MOVE'.
      PERFORM check_selection.
    WHEN 'MBAK'.
      PERFORM another_selection.
    WHEN 'ALL'.
      PERFORM select_all.
    WHEN 'CLEAR'.
      PERFORM clear_all.
    WHEN 'DELETE'.
      PERFORM delete_all.
    WHEN 'EXPAND'.
      PERFORM expand_all.
    WHEN 'COLLAPSE'.
      PERFORM collapse_all.
    WHEN OTHERS.
      CALL METHOD cl_gui_cfw=>dispatch.
  ENDCASE.
  CLEAR ok_code.
  CALL METHOD cl_gui_cfw=>flush.
ENDMODULE.                             " PAI  INPUT
*&      Form  build_fieldcatalog
      build fieldcatalog for structure sflight
FORM build_fieldcatalog.
get fieldcatalog
  CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'SFLIGHT'
    CHANGING
      ct_fieldcat      = gt_fieldcatalog.
change fieldcatalog
  DATA: ls_fieldcatalog TYPE lvc_s_fcat.
  LOOP AT gt_fieldcatalog INTO ls_fieldcatalog.
    CASE ls_fieldcatalog-fieldname.
      WHEN 'CARRID' OR 'CONNID' OR 'FLDATE'.
        ls_fieldcatalog-no_out = 'X'.
        ls_fieldcatalog-key    = ''.
      WHEN 'PRICE' OR 'SEATSOCC' OR 'SEATSMAX' OR 'PAYMENTSUM'.
        ls_fieldcatalog-do_sum = 'X'.
    ENDCASE.
    MODIFY gt_fieldcatalog FROM ls_fieldcatalog.
  ENDLOOP.
ENDFORM.                               " build_fieldcatalog
*&      Form  build_hierarchy_header
      build hierarchy-header-information
     -->P_L_HIERARCHY_HEADER  strucxture for hierarchy-header
FORM build_hierarchy_header CHANGING
                               p_hierarchy_header TYPE treev_hhdr.
  p_hierarchy_header-heading = 'Hierarchy Header'.          "#EC NOTEXT
  p_hierarchy_header-tooltip =
                         'This is the Hierarchy Header !'.  "#EC NOTEXT
  p_hierarchy_header-width = 30.
  p_hierarchy_header-width_pix = ''.
ENDFORM.                               " build_hierarchy_header
*&      Form  exit_program
      free object and leave program
FORM exit_program.
  CALL METHOD tree1->free.
  LEAVE PROGRAM.
ENDFORM.                               " exit_program
*&      Form  check_selection
      text
-->  p1        text
<--  p2        text
FORM check_selection .
create container for alv-tree
  DATA: l_tree_container_name(30) TYPE c,
        l_custom_container2 TYPE REF TO cl_gui_custom_container.
  l_tree_container_name = 'TREE2'.
  IF sy-batch IS INITIAL.
    CREATE OBJECT l_custom_container2
      EXPORTING
            container_name = l_tree_container_name
      EXCEPTIONS
            cntl_error                  = 1
            cntl_system_error           = 2
            create_error                = 3
            lifetime_error              = 4
            lifetime_dynpro_dynpro_link = 5.
    IF sy-subrc <> 0.
      MESSAGE x208(00) WITH 'ERROR'.                        "#EC NOTEXT
    ENDIF.
  ENDIF.
  CREATE OBJECT go_grid
    EXPORTING
   I_SHELLSTYLE      = 0
   I_LIFETIME        =
      i_parent          = l_custom_container2
   I_APPL_EVENTS     = space
   I_PARENTDBG       =
   I_APPLOGPARENT    =
   I_GRAPHICSPARENT  =
   I_NAME            =
EXCEPTIONS
   ERROR_CNTL_CREATE = 1
   ERROR_CNTL_INIT   = 2
   ERROR_CNTL_LINK   = 3
   ERROR_DP_CREATE   = 4
   others            = 5
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
               WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
  PERFORM load_data_into_grid.
*data: lt_nodes type LVC_T_NKEY,
     ls_nodes like line of lt_nodes,
     ls_checked like line of gt_checked.
*loop at gt_checked into ls_checked.
ls_nodes = ls_checked-nodekey.
append ls_nodes to lt_nodes.
*endloop.
*CALL METHOD tree1->unselect_nodes
EXPORTING
   it_node_key                  = lt_nodes
EXCEPTIONS
   CNTL_SYSTEM_ERROR            = 1
   DP_ERROR                     = 2
   MULTIPLE_NODE_SELECTION_ONLY = 3
   ERROR_IN_NODE_KEY_TABLE      = 4
   FAILED                       = 5
   others                       = 6
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
ENDFORM.                    " check_selection
*&      Form  another_selection
      text
-->  p1        text
<--  p2        text
FORM another_selection .
create container for alv-tree
  DATA: l_tree_container_name(30) TYPE c,
        l_custom_container2 TYPE REF TO cl_gui_custom_container.
  l_tree_container_name = 'TREE2'.
  IF sy-batch IS INITIAL.
    CREATE OBJECT l_custom_container2
      EXPORTING
            container_name = l_tree_container_name
      EXCEPTIONS
            cntl_error                  = 1
            cntl_system_error           = 2
            create_error                = 3
            lifetime_error              = 4
            lifetime_dynpro_dynpro_link = 5.
    IF sy-subrc <> 0.
      MESSAGE x208(00) WITH 'ERROR'.                        "#EC NOTEXT
    ENDIF.
  ENDIF.
  CREATE OBJECT ro_grid
    EXPORTING
   I_SHELLSTYLE      = 0
   I_LIFETIME        =
      i_parent          = l_custom_container2
   I_APPL_EVENTS     = space
   I_PARENTDBG       =
   I_APPLOGPARENT    =
   I_GRAPHICSPARENT  =
   I_NAME            =
EXCEPTIONS
   ERROR_CNTL_CREATE = 1
   ERROR_CNTL_INIT   = 2
   ERROR_CNTL_LINK   = 3
   ERROR_DP_CREATE   = 4
   others            = 5
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
               WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
  PERFORM load_data_into_grid1.
  DATA: lt_unsel TYPE lvc_t_nkey,
        ls_unsel LIKE LINE OF lt_unsel.
  LOOP AT gt_checked INTO gs_checked.
    ls_unsel = gs_checked-nodekey.
    APPEND ls_unsel TO lt_unsel.
  ENDLOOP.
  CALL METHOD tree1->unselect_nodes
    EXPORTING
      it_node_key                  = lt_unsel
    EXCEPTIONS
      cntl_system_error            = 1
      dp_error                     = 2
      multiple_node_selection_only = 3
      error_in_node_key_table      = 4
      failed                       = 5
      OTHERS                       = 6.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
*CALL METHOD tree1->unselect_all
EXCEPTIONS
   CNTL_SYSTEM_ERROR = 1
   FAILED            = 2
   others            = 3
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
  DATA: text TYPE lvc_value,
   item TYPE lvc_t_layi,
   node TYPE lvc_s_layn,
   inode TYPE lvc_nkey.
  FIELD-SYMBOLS: <wa> TYPE ANY.
  DATA: l_dref_wa LIKE LINE OF gt_sflight.
  ASSIGN l_dref_wa TO <wa>.
  READ TABLE gt_checked INTO gs_checked WITH KEY nodekey = 3.
  inode = gs_checked-nodekey.
  CALL METHOD tree1->get_outtab_line
    EXPORTING
      i_node_key     = inode
    IMPORTING
      e_outtab_line  = <wa>
      e_node_text    = text
      et_item_layout = item
      es_node_layout = node
    EXCEPTIONS
      node_not_found = 1
      OTHERS         = 2.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
  DATA: lt_layout TYPE lvc_t_laci,
        layout LIKE LINE OF lt_layout.
  layout-chosen = 'X'.
  layout-fieldname = tree1->c_hierarchy_column_name.
ls_item_layout-chosen = 'X'.           "To give default checkbox value checked
  layout-class   = cl_gui_column_tree=>item_class_checkbox.
  layout-editable = 'X'.
LAYOUT-U_CHOSEN = 'X'.
  APPEND layout TO lt_layout.
  CALL METHOD tree1->change_node
    EXPORTING
      i_node_key     = inode
      i_outtab_line  = <wa>
   IS_NODE_LAYOUT =
      it_item_layout =  lt_layout
   I_NODE_TEXT    =
   I_U_NODE_TEXT  =
    EXCEPTIONS
      node_not_found = 1
      OTHERS         = 2
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
*CALL METHOD tree1->change_item
EXPORTING
   i_node_key     = inode
   i_fieldname    = gs_checked-FIELDNAME
   i_data         = <wa>
   I_U_DATA       = ''
   IS_ITEM_LAYOUT = layout
EXCEPTIONS
   NODE_NOT_FOUND = 1
   others         = 2
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
*loop at lt_unsel into ls_unsel.
*CALL METHOD tree1->update_checked_items
EXPORTING
   i_node_key    = ls_unsel
   i_fieldname   = ''
   i_checked     = ''
EXCEPTIONS
   PROGRAM_ERROR = 1
   others        = 2
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
*endif.
ENDFORM.                    " another_selection
*&      Form  select_all
      text
-->  p1        text
<--  p2        text
FORM select_all .
  CONSTANTS: c_x(1) TYPE c VALUE 'X'.
*********Check box modifications.
  CALL METHOD tree1->delete_all_nodes
    EXCEPTIONS
      failed            = 1
      cntl_system_error = 2
      OTHERS            = 3.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
clear l_part_key.
create hierarchy
  PERFORM create_hierarchy USING c_x.
  CALL METHOD tree1->expand_node
    EXPORTING
      i_node_key          = gt_node
   I_LEVEL_COUNT       = 1
      i_expand_subtree    = 'X'
    EXCEPTIONS
      failed              = 1
      illegal_level_count = 2
      cntl_system_error   = 3
      node_not_found      = 4
      cannot_expand_leaf  = 5
      OTHERS              = 6
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
add own functioncodes to the toolbar
perform change_toolbar.
register events
perform register_events.
adjust column_width
call method tree1->COLUMN_OPTIMIZE.
ENDFORM.                    " select_all
*&      Form  clear_all
      text
-->  p1        text
<--  p2        text
FORM clear_all .
  CONSTANTS: c_x(1) TYPE c VALUE space.
*********Check box modifications.
  CALL METHOD tree1->delete_all_nodes
    EXCEPTIONS
      failed            = 1
      cntl_system_error = 2
      OTHERS            = 3.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
create hierarchy
  PERFORM create_hierarchy USING c_x.
  CALL METHOD tree1->expand_node
    EXPORTING
      i_node_key          = gt_node
   I_LEVEL_COUNT       = 1
      i_expand_subtree    = 'X'
    EXCEPTIONS
      failed              = 1
      illegal_level_count = 2
      cntl_system_error   = 3
      node_not_found      = 4
      cannot_expand_leaf  = 5
      OTHERS              = 6
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
ENDFORM.                    " clear_all
*&      Form  delete_all
      text
-->  p1        text
<--  p2        text
FORM delete_all .
*********Check box modifications.
  CALL METHOD tree1->delete_all_nodes
    EXCEPTIONS
      failed            = 1
      cntl_system_error = 2
      OTHERS            = 3.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
ENDFORM.                    " delete_all
*&      Form  expand_all
      text
-->  p1        text
<--  p2        text
FORM expand_all .
  CALL METHOD tree1->expand_node
    EXPORTING
      i_node_key          = gt_node
   I_LEVEL_COUNT       = 1
      i_expand_subtree    = 'X'
    EXCEPTIONS
      failed              = 1
      illegal_level_count = 2
      cntl_system_error   = 3
      node_not_found      = 4
      cannot_expand_leaf  = 5
      OTHERS              = 6
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
ENDFORM.                    " expand_all
*&      Form  collapse_all
      text
-->  p1        text
<--  p2        text
FORM collapse_all .
  CALL METHOD tree1->collapse_all_nodes
    EXCEPTIONS
      failed            = 1
      cntl_system_error = 2
      OTHERS            = 3.
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
ENDFORM.                    " collapse_all
*&      Form  load_data_into_grid
      text
-->  p1        text
<--  p2        text
FORM load_data_into_grid .
  DATA:
  For parameter IS_VARIANT
      l_layout TYPE disvariant,
  gs_layout TYPE lvc_s_layo.
  DATA gi_sflight TYPE TABLE OF zsflight.
Load data into the grid and display them
  l_layout-report = sy-repid.
  gs_layout-grid_title = 'Amits Test Program'.
  gs_layout-sel_mode = 'A'.
  SELECT *
   FROM zsflight
   INTO TABLE gi_sflight.
  CALL METHOD go_grid->set_table_for_first_display
    EXPORTING
      i_structure_name = 'SFLIGHT'
      is_layout        = gs_layout
      is_variant       = l_layout
      i_save           = 'A'
    CHANGING
      it_outtab        = gi_sflight.
ENDFORM.                    " load_data_into_grid
*&      Form  load_data_into_grid
      text
-->  p1        text
<--  p2        text
FORM load_data_into_grid1.
  DATA:
  For parameter IS_VARIANT
      l_layout TYPE disvariant,
  gs_layout TYPE lvc_s_layo.
  DATA gi_sflight TYPE TABLE OF zapempl.
Load data into the grid and display them
  l_layout-report = sy-repid.
  gs_layout-grid_title = 'Rams Test Program'.
  gs_layout-sel_mode = 'A'.
  SELECT *
   FROM zapempl
   INTO TABLE gi_sflight.
  CALL METHOD ro_grid->set_table_for_first_display
    EXPORTING
      i_structure_name = 'ZAPEMPL'
      is_layout        = gs_layout
      is_variant       = l_layout
      i_save           = 'A'
    CHANGING
      it_outtab        = gi_sflight.
ENDFORM.                    " load_data_into_grid1
*&      Form  build_header
      build table for html_header
-->  p1        text
<--  p2        text
FORM build_comment USING
      pt_list_commentary TYPE slis_t_listheader
      p_logo             TYPE sdydo_value.
  DATA: ls_line TYPE slis_listheader.
LIST HEADING LINE: TYPE H
  CLEAR ls_line.
  ls_line-typ  = 'H'.
LS_LINE-KEY:  NOT USED FOR THIS TYPE
  ls_line-info = 'ALV-tree-demo: flight-overview'.          "#EC NOTEXT
  APPEND ls_line TO pt_list_commentary.
STATUS LINE: TYPE S
  CLEAR ls_line.
  ls_line-typ  = 'S'.
  ls_line-key  = 'valid until'.                             "#EC NOTEXT
  ls_line-info = 'January 29 1999'.                         "#EC NOTEXT
  APPEND ls_line TO pt_list_commentary.
  ls_line-key  = 'time'.
  ls_line-info = '2.00 pm'.                                 "#EC NOTEXT
  APPEND ls_line TO pt_list_commentary.
ACTION LINE: TYPE A
  CLEAR ls_line.
  ls_line-typ  = 'A'.
LS_LINE-KEY:  NOT USED FOR THIS TYPE
  ls_line-info = 'actual data'.                             "#EC NOTEXT
  APPEND ls_line TO pt_list_commentary.
  p_logo = 'ENJOYSAP_LOGO'.
ENDFORM.                    "build_comment
*&      Form  create_hierarchy
      text
-->  p1        text
<--  p2        text
FORM create_hierarchy USING p_x.
  DATA: ls_sflight TYPE sflight,
        lt_sflight TYPE sflight OCCURS 0.
get data
  SELECT * FROM sflight INTO TABLE lt_sflight
                        UP TO 200 ROWS .
  SORT lt_sflight BY carrid connid fldate.
add data to tree
  DATA: l_carrid_key TYPE lvc_nkey,
        l_connid_key TYPE lvc_nkey,
        l_last_key TYPE lvc_nkey.
       l_part_key TYPE lvc_nkey
  PERFORM add_carrid_line USING    ls_sflight
                          CHANGING l_part_key.
  gt_node = l_part_key.
  LOOP AT lt_sflight INTO ls_sflight.
    ON CHANGE OF ls_sflight-carrid.
      PERFORM add_carrid_line USING    ls_sflight
                                       l_part_key
                              CHANGING l_carrid_key.
      PERFORM add_connid_line USING    ls_sflight
                                       l_carrid_key
                              CHANGING l_connid_key.
      PERFORM add_complete_line USING  ls_sflight
                                     l_connid_key
                                     p_x
                            CHANGING l_last_key.
      CONTINUE.
    ENDON.
    ON CHANGE OF ls_sflight-connid.
      PERFORM add_connid_line USING    ls_sflight
                                       l_carrid_key
                              CHANGING l_connid_key.
      PERFORM add_complete_line USING  ls_sflight
                                     l_connid_key
                                     p_x
                            CHANGING l_last_key.
      CONTINUE.
    ENDON.
    PERFORM add_complete_line USING  ls_sflight
                                     l_connid_key
                                     p_x
                            CHANGING l_last_key.
  ENDLOOP.
calculate totals
  CALL METHOD tree1->update_calculations.
this method must be called to send the data to the frontend
  CALL METHOD tree1->frontend_update.
ENDFORM.                               " create_hierarchy
*&      Form  add_carrid_line
      add hierarchy-level 1 to tree
     -->P_LS_SFLIGHT  sflight
     -->P_RELEATKEY   relatkey
    <-->p_node_key    new node-key
FORM add_carrid_line USING     ps_sflight TYPE sflight
                               p_relat_key TYPE lvc_nkey
                     CHANGING  p_node_key TYPE lvc_nkey.
  DATA: l_node_text TYPE lvc_value,
        ls_sflight TYPE sflight.
set item-layout
  DATA: lt_item_layout TYPE lvc_t_layi,
        ls_item_layout TYPE lvc_s_layi.
  ls_item_layout-t_image = '@3P@'.
  ls_item_layout-fieldname = tree1->c_hierarchy_column_name.
  ls_item_layout-style   =
                        cl_gui_column_tree=>style_intensifd_critical.
  APPEND ls_item_layout TO lt_item_layout.
add node
  l_node_text =  ps_sflight-carrid.
  CALL METHOD tree1->add_node
    EXPORTING
      i_relat_node_key = p_relat_key
      i_relationship   = cl_gui_column_tree=>relat_last_child
      i_node_text      = l_node_text
      is_outtab_line   = ls_sflight
      it_item_layout   = lt_item_layout
    IMPORTING
      e_new_node_key   = p_node_key.
ENDFORM.                               " add_carrid_line
*&      Form  add_connid_line
      add hierarchy-level 2 to tree
     -->P_LS_SFLIGHT  sflight
     -->P_RELEATKEY   relatkey
    <-->p_node_key    new node-key
FORM add_connid_line USING     ps_sflight TYPE sflight
                               p_relat_key TYPE lvc_nkey
                     CHANGING  p_node_key TYPE lvc_nkey.
  DATA: l_node_text TYPE lvc_value,
        ls_sflight TYPE sflight.
set item-layout
  DATA: lt_item_layout TYPE lvc_t_layi,
        ls_item_layout TYPE lvc_s_layi.
  ls_item_layout-t_image = '@3Y@'.
  ls_item_layout-style   =
                        cl_gui_column_tree=>style_intensified.
  ls_item_layout-fieldname = tree1->c_hierarchy_column_name.
  APPEND ls_item_layout TO lt_item_layout.
add node
  l_node_text =  ps_sflight-connid.
  CALL METHOD tree1->add_node
    EXPORTING
      i_relat_node_key = p_relat_key
      i_relationship   = cl_gui_column_tree=>relat_last_child
      i_node_text      = l_node_text
      is_outtab_line   = ls_sflight
      it_item_layout   = lt_item_layout
    IMPORTING
      e_new_node_key   = p_node_key.
ENDFORM.                               " add_connid_line
*&      Form  add_cmplete_line
      add hierarchy-level 3 to tree
     -->P_LS_SFLIGHT  sflight
     -->P_RELEATKEY   relatkey
    <-->p_node_key    new node-key
FORM add_complete_line USING   ps_sflight TYPE sflight
                               p_relat_key TYPE lvc_nkey
                               p_x
                     CHANGING  p_node_key TYPE lvc_nkey.
  DATA: l_node_text TYPE lvc_value.
set item-layout
  DATA: lt_item_layout TYPE lvc_t_layi,
        ls_item_layout TYPE lvc_s_layi.
  ls_item_layout-fieldname = tree1->c_hierarchy_column_name.
  ls_item_layout-chosen = p_x.           "To give default checkbox value checked
  ls_item_layout-class   = cl_gui_column_tree=>item_class_checkbox.
  ls_item_layout-editable = 'X'.
  APPEND ls_item_layout TO lt_item_layout.
  l_node_text =  ps_sflight-fldate.
  CALL METHOD tree1->add_node
    EXPORTING
      i_relat_node_key = p_relat_key
      i_relationship   = cl_gui_column_tree=>relat_last_child
      is_outtab_line   = ps_sflight
      i_node_text      = l_node_text
      it_item_layout   = lt_item_layout
    IMPORTING
      e_new_node_key   = p_node_key.
ENDFORM.                               " add_complete_line
*&      Form  register_events
      text
-->  p1        text
<--  p2        text
FORM register_events.
define the events which will be passed to the backend
  DATA: lt_events TYPE cntl_simple_events,
        l_event TYPE cntl_simple_event.
define the events which will be passed to the backend
  l_event-eventid = cl_gui_column_tree=>eventid_expand_no_children.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_checkbox_change.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_header_context_men_req.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_node_context_menu_req.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_item_context_menu_req.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_header_click.
  APPEND l_event TO lt_events.
  l_event-eventid = cl_gui_column_tree=>eventid_item_keypress.
  APPEND l_event TO lt_events.
  CALL METHOD tree1->set_registered_events
    EXPORTING
      events                    = lt_events
    EXCEPTIONS
      cntl_error                = 1
      cntl_system_error         = 2
      illegal_event_combination = 3.
  IF sy-subrc <> 0.
    MESSAGE x208(00) WITH 'ERROR'.                          "#EC NOTEXT
  ENDIF.
set Handler
  DATA: l_event_receiver TYPE REF TO lcl_tree_event_receiver.
  CREATE OBJECT l_event_receiver.
  SET HANDLER l_event_receiver->handle_node_ctmenu_request
                                                        FOR tree1.
  SET HANDLER l_event_receiver->handle_node_ctmenu_selected
                                                        FOR tree1.
  SET HANDLER l_event_receiver->handle_item_ctmenu_request
                                                        FOR tree1.
  SET HANDLER l_event_receiver->handle_item_ctmenu_selected
                                                        FOR tree1.
  SET HANDLER l_event_receiver->handle_checkbox_change FOR tree1.
ENDFORM.                               " register_events
*&      Form  change_toolbar
      text
-->  p1        text
<--  p2        text
FORM change_toolbar.
DATA: toolbar_event_receiver TYPE REF TO lcl_toolbar_event_receiver.
get toolbar control
  CALL METHOD tree1->get_toolbar_object
    IMPORTING
      er_toolbar = mr_toolbar.
  CHECK NOT mr_toolbar IS INITIAL.
add seperator to toolbar
  CALL METHOD mr_toolbar->add_button
    EXPORTING
      fcode     = ''
      icon      = ''
      butn_type = cntb_btype_sep
      text      = ''
      quickinfo = 'This is a Seperator'.                    "#EC NOTEXT
add Standard Button to toolbar (for Delete Subtree)
  CALL METHOD mr_toolbar->add_button
    EXPORTING
      fcode     = 'DELETE'
      icon      = '@18@'
      butn_type = cntb_btype_button
      text      = ''
      quickinfo = 'Delete subtree'.                         "#EC NOTEXT
add Dropdown Button to toolbar (for Insert Line)
  CALL METHOD mr_toolbar->add_button
    EXPORTING
      fcode     = 'INSERT_LC'
      icon      = '@17@'
      butn_type = cntb_btype_dropdown
      text      = ''
      quickinfo = 'Insert Line'.                            "#EC NOTEXT
set event-handler for toolbar-control
  CREATE OBJECT toolbar_event_receiver.
  SET HANDLER toolbar_event_receiver->on_function_selected
                                                      FOR mr_toolbar.
  SET HANDLER toolbar_event_receiver->on_toolbar_dropdown
                                                      FOR mr_toolbar.
ENDFORM.                               " change_toolbar
*&      Form  init_tree
      text
-->  p1        text
<--  p2        text
FORM init_tree.
create fieldcatalog for structure sflight
  PERFORM build_fieldcatalog.
create container for alv-tree
  DATA: l_tree_container_name(30) TYPE c,
        l_custom_container TYPE REF TO cl_gui_custom_container.
  l_tree_container_name = 'TREE1'.
  IF sy-batch IS INITIAL.
    CREATE OBJECT l_custom_container
      EXPORTING
            container_name = l_tree_container_name
      EXCEPTIONS
            cntl_error                  = 1
            cntl_system_error           = 2
            create_error                = 3
            lifetime_error              = 4
            lifetime_dynpro_dynpro_link = 5.
    IF sy-subrc <> 0.
      MESSAGE x208(00) WITH 'ERROR'.                        "#EC NOTEXT
    ENDIF.
  ENDIF.
create tree control
  CREATE OBJECT tree1
    EXPORTING
        parent              = l_custom_container
        node_selection_mode = cl_gui_column_tree=>node_sel_mode_multiple "node_sel_mode_single
        item_selection      = 'X'
        no_html_header      = ''
        no_toolbar          = ''
    EXCEPTIONS
        cntl_error                   = 1
        cntl_system_error            = 2
        create_error                 = 3
        lifetime_error               = 4
        illegal_node_selection_mode  = 5
        failed                       = 6
        illegal_column_name          = 7.
  IF sy-subrc <> 0.
    MESSAGE x208(00) WITH 'ERROR'.                          "#EC NOTEXT
  ENDIF.
create Hierarchy-header
  DATA l_hierarchy_header TYPE treev_hhdr.
  PERFORM build_hierarchy_header CHANGING l_hierarchy_header.
create info-table for html-header
  DATA: lt_list_commentary TYPE slis_t_listheader,
        l_logo             TYPE sdydo_value.
  PERFORM build_comment USING
                 lt_list_commentary
                 l_logo.
repid for saving variants
  DATA: ls_variant TYPE disvariant.
  ls_variant-report = sy-repid.
create emty tree-control
  CALL METHOD tree1->set_table_for_first_display
    EXPORTING
      is_hierarchy_header = l_hierarchy_header
      it_list_commentary  = lt_list_commentary
      i_logo              = l_logo
      i_background_id     = 'ALV_BACKGROUND'
      i_save              = 'A'
      is_variant          = ls_variant
    CHANGING
      it_outtab           = gt_sflight "table must be emty !!
      it_fieldcatalog     = gt_fieldcatalog.
  CONSTANTS: c_s(1) TYPE c VALUE space.
create hierarchy
  PERFORM create_hierarchy USING c_s.
add own functioncodes to the toolbar
  PERFORM change_toolbar.
register events
  PERFORM register_events.
adjust column_width
call method tree1->COLUMN_OPTIMIZE.
ENDFORM.                    " init_tree
Award points if found useful.
Regards
Indrajit