Creating dynamic tree in Apex 4.0

Hi Friends,
I am trying to display the "sites" and "devices" under that site in a tree. THe site is the first level in the tree. But under a site there will be some 20-30 devices. I want to display the first 10 devices when clicking on the '+' in a site and a 'more' link after the 10th device. By clicking the 'more' link ,display the next 10 devices and so on. Is there any way to achieve this in Apex 4.0. Please help
Regards,
Jyothi
Edited by: Jyothi on Jan 9, 2011 3:28 AM

Hi Vee,
Sorry for the late reply. I need exactly the same
do you want to add a 'more link' in place of all 2nd level children in your tree for 1st level node having more than 10 children under it ?
If there is 25 nodes i need to display the first 10 nodes and there is a more link in the last part. when clicking on the "more" link the next 10 nodes but with an additional "back" link in the top like
a..|-*back*
   |- a11
   |- a12
   |- a13
   |- a14
   |- a15
   |- a16
   |- a17
   |- a18
   |- a19
   |- a20
   *more*when clicking on the back link the node part must dislay the last 10 nodes like.
a..|-a1
   |- a2
   |- a3
   |- a4
   |- a5
   |- a6
   |- a7
   |- a8
   |- a9
   |- a10
   *more*When clicking the "more" button will display the next 10 nodes with a "back" link like.
a..|-*back*
   |- a21
   |- a22
   |- a23
   |- a24
   |- a25
If thge no: of nodes is less than 10 only "back" link is needed. Am i confusing you?
Please help.
Thanks,
Jyothi
Edited by: Jyothi on Jan 9, 2011 3:27 AM

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DATA:
    element_parent TYPE REF TO if_wd_context_element,
    lv_object_key1   type string,
    lv_object_type type string.
DATA:
       node_root_entry                     TYPE REF TO if_wd_context_node,
       elem_root_entry                     TYPE REF TO if_wd_context_element,
       stru_root_entry                     TYPE if_structure_view_new=>element_root_entry ,
       item_valid_from                     LIKE stru_root_entry-valid_from,
       item_plant                          LIKE stru_root_entry-plant,
       item_equi_key                       LIKE stru_root_entry-equi_key,
       item_object_key                     LIKE stru_root_entry-object_key,
       item_object_type                    TYPE string,
       item_path                           TYPE string,
       item_parent_path                    TYPE string,
      context_node                        TYPE REF TO if_wd_context_node,
       root_entry                          TYPE if_structure_view_new=>element_selected_entry.
      l_ref_componentcontroller           TYPE REF TO ig_componentcontroller.
DATA:
     node_root_info                    TYPE REF TO if_wd_context_node,
     elem_root_info                    TYPE REF TO if_wd_context_element,
      stru_root_info                    TYPE if_structure_view_new=>element_root_info .
DATA:
      element                            TYPE REF TO if_wd_context_element,
      node_selected_entry                TYPE REF TO if_wd_context_node,
      elem_selected_entry                TYPE REF TO if_wd_context_element.
DATA:
      ls_hier_return      TYPE rplm_ts_struc_elements,
      lt_hier_return      TYPE TABLE OF rplm_ts_struc_elements,
      ls_hier_return_temp TYPE rplm_ts_struc_elements,
      lt_hier_return_temp TYPE TABLE OF rplm_ts_struc_elements,
      ls_hier_level       TYPE rplm_ts_hier_level,
      lt_hier_level       TYPE TABLE OF rplm_ts_hier_level,
      ls_hier_return_sort TYPE rplm_mt_ts_hier,
      lt_hier_return_sort TYPE TABLE OF rplm_mt_ts_hier.
DATA:
       temp_hier_level TYPE if_structure_view_new=>element_hier_level,
       lt_hier_temp    TYPE TABLE OF if_structure_view_new=>element_hier_level,
       lt_temp         TYPE TABLE OF if_structure_view_new=>element_hier_level.
DATA:
       lc_path       TYPE string,
       lv_object_key TYPE string.
DATA:
       lv_hier_lines TYPE i.
DATA:
      node_entries                        TYPE REF TO if_wd_context_node,
       node_sub_entries                    TYPE REF TO if_wd_context_node,
      elem_sub_entries                    TYPE REF TO if_wd_context_element,
       stru_sub_entries                    TYPE if_structure_view_new=>element_sub_entries .
TYPES: BEGIN OF ls_hier_type,             "structure for Hierarchy table
      object(31)      TYPE c,         "Objectkey
      predecessor(31) TYPE c,         "Objectkey Predecessor
      data(2000)      TYPE c,         "Data container
      level           TYPE i,         "level of object in tree
      successors(1)   TYPE c,         "Object has successors: YES/NO/U
      display(1)      TYPE c,         "Object is displayed: YES/NO
      selected(1)     TYPE c,         "Object is selected/marked: YES/NO
      index_predec    LIKE sy-tabix, "Index predecessor
      strno           TYPE ilom_strno,"External number for func. loc.
                                     "in BOMs used for top object
   END OF ls_hier_type.
DATA:
       ls_hier     TYPE ls_hier_type,
       lt_hier     TYPE TABLE OF ls_hier_type WITH DEFAULT KEY,
       lt_mat_hier TYPE TABLE OF ls_hier_type WITH DEFAULT KEY.
" For retrieving Material Data Heirarchy
DATA:
       lh_stpo_tab     TYPE TABLE OF rihstpx ,
       lwa_stpo_tab    LIKE LINE OF lh_stpo_tab,
       check_menge     TYPE string ,
       check_meins     TYPE string ,
       lwa_mat_hier    LIKE LINE OF lt_mat_hier ,
       lt_dup_mat_hier LIKE lt_mat_hier,
       lv_len          TYPE i,
       lv_len_temp     TYPE i .
DATA:
       lv_equnr TYPE equi-equnr,
       lv_tplnr TYPE iflo-tplnr,
       lv_matnr TYPE mast-matnr.
DATA:
       lv_cnt   TYPE i,
       lv_index TYPE i.
DATA:
       lv_path        TYPE string,
       lv_parent_path TYPE string,
       pos            TYPE string,
       separator      TYPE c VALUE '.',
       max_level      TYPE i,
       temp_level     TYPE i,
       counter        TYPE i VALUE 1.
TYPES: BEGIN OF ls_pred_type,             "structure for Hierarchy table
     parent(31)      TYPE c,         "Objectkey Predecessor
     path(2000)      TYPE c,         "Data container
     index_predec    LIKE sy-tabix, "Index predecessor
END OF ls_pred_type.
DATA:
      ls_pred TYPE ls_pred_type,
      lt_pred TYPE TABLE OF ls_pred_type WITH DEFAULT KEY.
DATA:
      lv_int_obj_key TYPE string,
      obj_len        TYPE i,
      lv_funcloc_ext TYPE ilom_strno,
      lv_funcloc     TYPE itob-tplnr.
DATA:
      lv_level        TYPE i,
      lv_temp         TYPE i,
      lt_path_entries TYPE string_table.
DATA:
      node_general                        TYPE REF TO if_wd_context_node,
      elem_general                        TYPE REF TO if_wd_context_element,
      stru_general                        TYPE if_structure_view_new=>element_general ,
      item_collapse_visibility            LIKE stru_general-collapse_visibility.
DATA:
      elem_context                        TYPE REF TO if_wd_context_element,
      stru_context                        TYPE if_structure_view_new=>element_context ,
      item_expand_all                     LIKE stru_context-expand_all.
lv_path = path.
Get Element whose children shall be loaded
element_parent = wd_context->path_get_element( lv_path ).
element_parent->get_attribute(
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      IMPORTING
        value = LV_object_key ).
element_parent->get_attribute(
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        value = lv_object_type ).
node_root_entry = wd_context->get_child_node( name = wd_this->wdctx_root_entry ).
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elem_root_entry = node_root_entry->get_element( ).
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elem_root_entry->get_attribute(
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elem_root_entry->get_attribute(
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item_equi_key = lv_object_key.
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item_object_key = lv_object_key.
item_equi_key = ''.
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    EXPORTING
      datum             = item_valid_from
      equnr             = lv_equnr
      tplnr             = lv_tplnr
      matnr             = lv_matnr
      levdo             = '99'
      levup             = '00'
      sanin             = 'X'
      select_equi       = 'X'
      select_iflo       = 'X'
      select_stpo       = 'X'
      selmod            = 'D'
      stkkz             = ''
      werks             = item_plant
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      with_equi_hier    = 'X'
      with_iflo_hier    = 'X'
      with_btyp         = 'X'
      with_mara         = 'X'
      with_ibase_hier   = ''
      capid             = ''
      emeng             = 0
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      et_hier           = lt_hier
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      no_object_defined = 2
      no_selection      = 3
      no_valid_equnr    = 4
      no_valid_matnr    = 5
      no_valid_selmod   = 6
      no_valid_tplnr    = 7
      OTHERS            = 8.
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        ls_hier_return-is_leaf = abap_true.
        ls_hier_return-is_expanded = abap_true.
        ls_hier_return-children_loaded = abap_true.
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      ls_hier_return-object_type = 'EQUI'.
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        ls_hier_return-is_leaf = abap_false.
        ls_hier_return-is_expanded = abap_false.
        ls_hier_return-children_loaded = abap_true.
      ELSE.
        ls_hier_return-is_leaf = abap_true.
        ls_hier_return-is_expanded = abap_true.
        ls_hier_return-children_loaded = abap_true.
      ENDIF.
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      ls_hier_return-icon = 'ICON_MATERIAL'.
      ls_hier_return-object_type = 'MATERIAL'.
      IF ls_hier-successors = 'Y'.
        ls_hier_return-is_leaf = abap_false.
        ls_hier_return-is_expanded = abap_false.
        ls_hier_return-children_loaded = abap_false.
      ELSE.
        ls_hier_return-is_leaf = abap_true.
        ls_hier_return-is_expanded = abap_true.
        ls_hier_return-children_loaded = abap_true.
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    ELSEIF ls_hier-object+lv_len_temp(1) = 'X'.
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        ls_hier_return-is_leaf = abap_false.
        ls_hier_return-is_expanded = abap_false.
        ls_hier_return-children_loaded = abap_false.
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        ls_hier_return-is_leaf = abap_true.
        ls_hier_return-is_expanded = abap_true.
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ENDLOOP.
lt_hier_return_temp = lt_hier_return.
DESCRIBE TABLE lt_hier LINES lv_hier_lines.
IF lv_hier_lines EQ 0.
    elem_selected_entry = wd_context->path_get_element( '1.ENTRIES.1' ).
Get children node
    elem_selected_entry->set_attribute(
    value = abap_true
    name = 'IS_LEAF' ).
ENDIF.
*************************************Deleting Now***********
SORT lt_hier_level BY level DESCENDING.
LOOP AT lt_hier_level INTO ls_hier_level.
    max_level = ls_hier_level-level.
    EXIT.
ENDLOOP.
SORT lt_hier_level BY level ASCENDING.
LOOP AT lt_hier_level INTO ls_hier_level WHERE level EQ 0.
    ls_hier_level-path = '1.ENTRIES.1'.
    ls_hier_level-parent_path = '1.ENTRIES.1'.
    MODIFY lt_hier_level FROM ls_hier_level.
ENDLOOP.
************************New design to Generate Path and Parent path
lv_cnt = 0.
temp_level = 1.
SORT lt_hier_level BY object_key ASCENDING.
LOOP AT lt_hier_level INTO ls_hier_level WHERE level EQ 1.
   lv_cnt = lv_cnt + 1.
   lv_parent_path = '1.ENTRIES.1'.
   ls_hier_level-parent_path = lv_parent_path.
   pos = lv_cnt.
   CONCATENATE lv_parent_path separator 'SUB_ENTRIES' separator pos INTO lv_path.
   ls_hier_level-path = lv_path.
   MODIFY lt_hier_level FROM ls_hier_level.
ENDLOOP.
temp_level = 1.
lv_cnt = 0.
*********************Need to call this for each level ***************************
WHILE temp_level LT max_level.
   CLEAR lt_pred.
   CLEAR ls_pred.
   LOOP AT lt_hier_level INTO ls_hier_level WHERE level EQ temp_level.
     ls_pred-parent = ls_hier_level-object_key.
     ls_pred-path = ls_hier_level-path.
     APPEND ls_pred TO lt_pred.
   ENDLOOP.
   SORT lt_pred BY parent.
   DELETE ADJACENT DUPLICATES FROM lt_pred.
   LOOP AT lt_pred INTO ls_pred.
     lv_cnt = 0.
     LOOP AT lt_hier_level INTO ls_hier_level WHERE predecessor EQ ls_pred-parent.
       lv_cnt = lv_cnt + 1.
       lv_parent_path = ls_pred-path.
       ls_hier_level-parent_path = lv_parent_path.
       lv_path = ''.
       pos = lv_cnt.
       CONCATENATE lv_parent_path separator 'SUB_ENTRIES' separator pos INTO lv_path.
       ls_hier_level-path = lv_path.
       MODIFY lt_hier_level FROM ls_hier_level.
     ENDLOOP.
   ENDLOOP.
   temp_level = temp_level + 1.
ENDWHILE.
LOOP AT lt_hier_level INTO ls_hier_level.
   LOOP AT lt_hier_return INTO ls_hier_return.
     IF ls_hier_level-object_key = ls_hier_return-object_key.
       MOVE-CORRESPONDING ls_hier_level TO ls_hier_return.
       MODIFY lt_hier_return FROM ls_hier_return.
     ENDIF.
   ENDLOOP.
ENDLOOP.
SORT lt_hier_return BY path ASCENDING.
**************************Delete the extra first character returned by PM_HIERARCHY_CALL******
LOOP AT lt_hier_return INTO ls_hier_return.
    IF ls_hier_return-object_key(1) = 'T'.
      SHIFT ls_hier_return-object_key BY 1 PLACES.
      lv_object_key = ls_hier_return-object_key.
      lv_funcloc_ext = lv_object_key.
      CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
        EXPORTING
          input = lv_funcloc_ext
        IMPORTING
          output = lv_funcloc.
      lv_int_obj_key = lv_funcloc.
      ls_hier_return-object_key = lv_int_obj_key.
    ELSEIF ls_hier_return-object_key(1) = 'E'.
      SHIFT ls_hier_return-object_key BY 1 PLACES.
      lv_object_key = ls_hier_return-object_key.
      obj_len = strlen( lv_object_key ).
      IF obj_len GE 18.
        lv_object_key = lv_object_key+0(18).
      ENDIF.
      wd_comp_controller->conv_ext_2_int(
       EXPORTING
         iv_object_key_ext = lv_object_key            " String
         iv_object_type =   'EQUI'               " String
       IMPORTING
         ev_object_key =   lv_int_obj_key                " String
      SHIFT lv_int_obj_key LEFT DELETING LEADING '0'.
      ls_hier_return-object_key = lv_int_obj_key.
    ELSE.
      SHIFT ls_hier_return-object_key BY 1 PLACES.
      lv_object_key = ls_hier_return-object_key.
      obj_len = strlen( lv_object_key ).
      IF obj_len GE 18.
        lv_object_key = lv_object_key+0(18).
      ENDIF.
      SHIFT lv_object_key LEFT DELETING LEADING '0'.
      ls_hier_return-object_key = lv_object_key.
    ENDIF.
    MODIFY lt_hier_return FROM ls_hier_return TRANSPORTING object_key object_key.
ENDLOOP.
LOOP AT lt_hier_level INTO ls_hier_level.
   IF ls_hier_level-object_key(1) = 'T'.
     SHIFT ls_hier_level-object_key BY 1 PLACES.
     lv_object_key = ls_hier_level-object_key.
     lv_funcloc_ext = lv_object_key.
     CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
       EXPORTING
         input = lv_funcloc_ext
       IMPORTING
         output = lv_funcloc.
     lv_int_obj_key = lv_funcloc.
     ls_hier_level-object_key = lv_int_obj_key.
   ELSEIF ls_hier_level-object_key(1) = 'E'.
     SHIFT ls_hier_level-object_key BY 1 PLACES.
     lv_int_obj_key = ls_hier_level-object_key.
     obj_len = strlen( lv_int_obj_key ).
     IF obj_len GE 18.
       lv_int_obj_key = lv_int_obj_key+0(18).
     ENDIF.
     wd_comp_controller->conv_ext_2_int(
      EXPORTING
        iv_object_key_ext = lv_int_obj_key            " String
        iv_object_type =   'EQUI'               " String
      IMPORTING
        ev_object_key =   lv_int_obj_key                " String
     SHIFT lv_int_obj_key LEFT DELETING LEADING '0'.
     ls_hier_level-object_key = lv_int_obj_key.
   ELSE.
     SHIFT ls_hier_level-object_key BY 1 PLACES.
     lv_int_obj_key = ls_hier_level-object_key.
     obj_len = strlen( lv_int_obj_key ).
     IF obj_len GE 18.
       lv_int_obj_key = lv_int_obj_key+0(18).
     ENDIF.
     SHIFT lv_int_obj_key LEFT DELETING LEADING '0'.
     ls_hier_level-object_key = lv_int_obj_key.
   ENDIF.
   MODIFY lt_hier_level FROM ls_hier_level TRANSPORTING object_key object_key.
ENDLOOP.
*********************Getinfo if root node else call Get_Children_Info to generate the structure as well*******
IF lv_path EQ '1.ENTRIES.1'.
    element = wd_context->path_get_element( lv_path ).
navigate from <ENTRIES> to <SUB_ENTRIES> via lead selection
    node_sub_entries = element->get_child_node( name = 'SUB_ENTRIES' ).
    element->get_attribute( EXPORTING name = 'OBJECT_KEY'
                             IMPORTING value = item_object_key ).
    element->get_attribute( EXPORTING name = `OBJECT_TYPE`
                            IMPORTING value = item_object_type ).
****************Get Info of Technical Objects*************
    wd_comp_controller->get_children_info(
      EXPORTING
        iv_lt_list =     lt_hier_return           " Rplm_Tt_Mt_Struc
        iv_path = ''
        iv_hier_level = lt_hier_level
      IMPORTING
        ev_lt_full =      lt_hier_return                   " Rplm_Tt_Mt_Struc
Create the strcuture by binding the entries to Node which is bound to the table
element = wd_context->path_get_element( lc_path ).
Get children node
        node_sub_entries = element->get_child_node( 'SUB_ENTRIES' ).
        CALL METHOD node_sub_entries->bind_table
          EXPORTING
            new_items            = lt_hier_return
            set_initial_elements = abap_true.
@TODO handle not set lead selection
   IF ( node_entries IS INITIAL ).
   ENDIF.
   lv_temp = 1.
***************Sort the LT_HIER_TABLE appropriately ******
   LOOP AT lt_hier_return INTO ls_hier_return .
     MOVE-CORRESPONDING ls_hier_return TO ls_hier_return_sort.
     ls_hier_return_sort-path_length = strlen( ls_hier_return_sort-path ).
     APPEND ls_hier_return_sort TO lt_hier_return_sort.
   ENDLOOP.
   SORT lt_hier_return_sort BY path_length ASCENDING path ASCENDING.
   CLEAR lt_hier_return.
   LOOP AT lt_hier_return_sort INTO ls_hier_return_sort.
     MOVE-CORRESPONDING ls_hier_return_sort TO ls_hier_return.
     APPEND ls_hier_return TO lt_hier_return.
   ENDLOOP.
*wd_comp_controller->gv_master_data = lt_hier_return.
   LOOP AT lt_hier_return INTO ls_hier_return.
     lv_path = ls_hier_return-path.
     lc_path = ls_hier_return-parent_path.
     IF lv_path NE '1.ENTRIES.1'.
       element = wd_context->path_get_element( lc_path ).
Get children node
       node_sub_entries = element->get_child_node( 'SUB_ENTRIES' ).
Now, create the children elements
       element->get_attribute( EXPORTING name = 'OBJECT_KEY'
                               IMPORTING value = ls_hier_level-predecessor ).
Create the strcuture by binding the entries to Node which is bound to the table
       CALL METHOD node_sub_entries->bind_structure
         EXPORTING
           new_item             = ls_hier_return
           set_initial_elements = abap_false.
     ENDIF.
   ENDLOOP.
Only when a new level is reached we create one more child node
else we attach our elements to same child node
    element = wd_context->path_get_element( item_path ).
Get children node
    element->set_attribute(
    value = abap_false
    name = 'IS_EXPANDED' ).
ENDIF.
navigate from <CONTEXT> to <GENERAL> via lead selection
node_general = wd_context->get_child_node( name = wd_this->wdctx_general ).
get element via lead selection
elem_general = node_general->get_element( ).
get single attribute
elem_general->set_attribute(
    name = `COLLAPSE_VISIBILITY`
    value = abap_false ).
node_selected_entry = wd_context->get_child_node( name = if_structure_view_new=>wdctx_selected_entry ).
get element via lead selection
elem_selected_entry = node_selected_entry->get_element( ).
get single attribute
elem_selected_entry->set_attribute(
      name = `OBJECT_KEY`
      value = '' ).
elem_selected_entry->set_attribute(
        name = `OBJECT_TYPE`
        value = '' ).
get element via lead selection
elem_context = wd_context->get_element( ).
get single attribute
elem_context->set_attribute(
    name = `EXPAND_ALL`
    value = abap_false ).
wd_this->enable_buttons(
endmethod.

How to create a tree in table?

How to create a tree in table?

Hi,
check these links,
Tree Structure:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/de59f7c2-0401-0010-f08d-8659cef543ce
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/49f2ea90-0201-0010-ce8e-de18b94aee2d#31
/people/paolo.romano2/blog/2007/11/09/dynamic-tree-in-abap-webdynpro
Regards,
Muneesh Gitta.

Creating dynamic tree in Apex 4.0

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