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Joined: 01 Sep 2007
Posts: 1636

PostPosted: Mon Sep 10, 2007 7:11 pm    Post subject: Tree Reports Reply with quote

STEP ONE – ADD THESE LINES OF CODE IN THE DECLARATION AREA

Code:
**** DECLARATION
DATA: BEGIN OF items OCCURS 100,
         id type sy-tabix,
         parent_id type sy-tabix,
         text(1000),
         symbol,
      END OF items,
      tabix_stack LIKE sy-tabix OCCURS 10 WITH HEADER LINE,
      items_show LIKE items OCCURS 100 WITH HEADER LINE.

DATA: parent_stack LIKE sy-tabix OCCURS 10 WITH HEADER LINE,
      t_parent     LIKE sy-tabix,
      current      LIKE sy-tabix.
INCLUDE <symbol>.
INCLUDE ZTREE_REPORT_INCLUDES.


STEP TWO – ADD THESE LINES OF CODE TO POPULATE THE INTERNAL TABLE
Code:
**** POPULATE DATA
REFRESH parent_stack. current = 0.
         parent_stack = 0. APPEND parent_stack.
LOOP AT itab_data.
  CASE itab_data-qualf.
    WHEN 1.    “New parent
              current = current + 1.
              PERFORM read_from_parent_stack CHANGING t_parent.
              parent_stack = current. APPEND parent_stack.
              PERFORM append_item USING current
                                        t_parent
                                        itab_xml_data.
    WHEN 2.    “End of current leg
              current = current + 1.
              PERFORM append_item USING current
                                        t_parent
                                        itab_xml_data.
              perform delete_parent_stack.
    WHEN 3.    “Same level
              current = current + 1.
              PERFORM read_from_parent_stack CHANGING t_parent.
              PERFORM append_item USING current
                                        t_parent
                                        itab_xml_data.
  ENDCASE.
ENDLOOP.


STEP THREE – ADD THESE LINES OF CODE TO PRINT THE REPORT

Code:
LOOP AT items WHERE parent_id = 0.
  MOVE-CORRESPONDING items TO items_show.
  items_show-symbol = '+'.
  APPEND items_show.
ENDLOOP.
PERFORM print_tree TABLES items_show.


STEP FOUR – ADD THESE LINES OF CODE TO EXPAND \ COLLAPSE THE TREE
Code:
* at line-selection - when the node is opened/closed or item double-clk
AT LINE-SELECTION.
  READ TABLE items WITH KEY parent_id = items_show-id. "see 'hide'
  IF sy-subrc = 0. "item has children - expand or collapse
    sy-lsind = 0.
    PERFORM expand_collapse USING items_show-id.
    PERFORM print_tree TABLES items_show.
  ELSE.            "item has NO children - perform some action
    READ TABLE items WITH KEY id = items_show-id.
    WRITE: 'Action performed on item "' NO-GAP, items-text NO-GAP,
           '", id.', items-id.
  ENDIF.


STEP FIVE – ADD THIS INCLUDE CODE
Code:
*----------------------------------------------------------------------*
*   INCLUDE ZTREE_REPORT_INCLUDES                                      *
*----------------------------------------------------------------------*
* form append_item
FORM append_item USING value(id) value(parent_id) value(text).
  items-id = id.
  items-parent_id = parent_id.
  items-text = text.
  APPEND items.
ENDFORM.                    " APPEND_ITEM

* form read_from_stack
FORM read_from_stack CHANGING tabix LIKE sy-tabix.
  DESCRIBE TABLE tabix_stack.
  CHECK sy-tfill NE 0.
  READ TABLE tabix_stack INDEX sy-tfill.
  tabix = tabix_stack.
  DELETE tabix_stack INDEX sy-tfill.
ENDFORM.

* form print tree
FORM print_tree TABLES items STRUCTURE items.
  DATA: v_tabix LIKE sy-tabix,
        start_tabix LIKE sy-tabix,
        v_level LIKE sy-tfill,
        v_offset TYPE i,
        v_id LIKE items-id,
        v_parent_id LIKE items-parent_id,
        v_parent_id_for_vline LIKE items-parent_id,
        v_prev_level TYPE i,
        v_items_count LIKE sy-tfill,
        v_vlines_string(200).
  CHECK NOT items[] IS INITIAL.
  SORT items BY parent_id id.
  READ TABLE items INDEX 1.
  v_parent_id = items-parent_id.
  start_tabix = 1.
  REFRESH tabix_stack.
  DO.
    LOOP AT items FROM start_tabix.
      v_tabix = start_tabix = sy-tabix.   "remember current index
      v_id = items-id.
      v_parent_id_for_vline = items-parent_id.
*     decrease level and exit loop if parent not the same as previous
      IF items-parent_id NE v_parent_id.
        PERFORM read_from_stack CHANGING start_tabix. "level = NoOfRecs
        READ TABLE items INDEX start_tabix.
        v_parent_id = items-parent_id.
        ADD 1 TO start_tabix.   "next loop starts from parent index + 1
*        clear vline
        IF v_level > 1.
          v_offset = 2 + ( v_level - 2 ) * 3.
          IF v_level = 1. v_offset = 1. ENDIF.
          v_vlines_string+v_offset = ' '.
        ENDIF.
        EXIT.
      ENDIF.
      v_parent_id = items-parent_id.
*     write item
      FORMAT COLOR OFF.
      DESCRIBE TABLE tabix_stack LINES v_level."level is no of StackRecs
      WRITE: / v_vlines_string.
      v_offset = v_level * 3.
      IF v_level NE 0.
        IF v_prev_level < v_level.
          WRITE: AT v_offset '|', / ''.
          WRITE: / v_vlines_string.
        ENDIF.
        v_offset = v_level * 3.
        WRITE AT v_offset '|--'.
      ENDIF.
      v_offset = v_offset + 3.
      CASE items-symbol.
        WHEN '+'.
          WRITE AT v_offset sym_plus_folder AS SYMBOL
                COLOR 4 INTENSIFIED HOTSPOT.
        WHEN '-'.
          WRITE AT v_offset sym_minus_folder AS SYMBOL
                COLOR 4 INTENSIFIED HOTSPOT.
        WHEN OTHERS. FORMAT COLOR 5.
      ENDCASE.
      WRITE: items-text.
      v_prev_level = v_level.
      HIDE: items-id.
      ADD 1 TO v_items_count.
      READ TABLE items WITH KEY parent_id = items-id.
*     increase level and exit loop if item has children
      IF sy-subrc = 0.
        start_tabix = sy-tabix.
        APPEND v_tabix TO tabix_stack.  "level is no of recs in stack
        v_parent_id = items-parent_id.
*        set vline
        v_tabix = v_tabix + 1.
        READ TABLE items INDEX v_tabix.
        v_offset = 2 + ( v_level - 1 ) * 3.
        IF v_level > 0.
          IF items-parent_id = v_parent_id_for_vline AND sy-subrc = 0.
            v_vlines_string+v_offset = '|'.
          ELSE.
            v_vlines_string+v_offset = ' '.
          ENDIF.
        ENDIF.
        EXIT.
      ENDIF.
*     at last - decrease level
      AT LAST.
*        clear vline
        IF v_level > 1.
          v_offset = 2 + ( v_level - 2 ) * 3.
          IF v_level = 1. v_offset = 1. ENDIF.
          v_vlines_string+v_offset = ' '.
        ENDIF.
        " next loop starts from parent index, not parent index + 1
        " because of different parents level will decrease anyway
        PERFORM read_from_stack CHANGING start_tabix.
        APPEND start_tabix TO tabix_stack. "must return index to stack
      ENDAT.
    ENDLOOP.
    DESCRIBE TABLE items.
    IF start_tabix > sy-tfill OR v_items_count >= sy-tfill.
      EXIT.
    ENDIF.
  ENDDO.
ENDFORM.

* form expand_collapse
FORM expand_collapse USING value(v_id).
  DATA: v_no_more_orphans,
        items_temp LIKE items OCCURS 100 WITH HEADER LINE.
  DELETE items_show WHERE parent_id = v_id. "try to collapse
  IF sy-subrc = 0.  "succesfull first collapse
    DO.            "cascade collapse - delete 'orphans' that are left
      REFRESH items_temp.
      MOVE items_show[] TO items_temp[].
      SORT items_temp BY id.
      v_no_more_orphans = 'X'.
      LOOP AT items_show WHERE parent_id NE ''.
        READ TABLE items_temp WITH KEY id = items_show-parent_id
                               BINARY SEARCH TRANSPORTING NO FIELDS.
        IF sy-subrc NE 0.     "no parent - it's an orphan
          CLEAR v_no_more_orphans.
          DELETE items_show.
        ENDIF.
      ENDLOOP.
      IF v_no_more_orphans = 'X'. EXIT. ENDIF.
    ENDDO.
    items_show-symbol = '+'.
    MODIFY items_show TRANSPORTING symbol WHERE id = v_id.
  ELSE.              "unsuccessfull collapse - expand
    items_show-symbol = '-'.
    MODIFY items_show TRANSPORTING symbol WHERE id = v_id.
    LOOP AT items WHERE parent_id = v_id.      "show children
      APPEND items TO items_show.
    ENDLOOP.
    LOOP AT items_show WHERE parent_id = v_id. "check grandchildren
      READ TABLE items WITH KEY parent_id = items_show-id.
      IF sy-subrc = 0.
        items_show-symbol = '+'.
      ELSE.
        items_show-symbol = ''.
      ENDIF.
      MODIFY items_show.
    ENDLOOP.
  ENDIF.
ENDFORM.

* form read_from_parent_stack
FORM read_from_parent_stack CHANGING tabix LIKE sy-tabix.
  DESCRIBE TABLE parent_stack.
  CHECK sy-tfill NE 0.
  READ TABLE parent_stack INDEX sy-tfill.
  tabix = parent_stack.
*  DELETE tabix_stack INDEX sy-tfill.
ENDFORM.

*&      Form  delete_parent_stack
*&---------------------------------------------------------------------*
form delete_parent_stack.
  DESCRIBE TABLE parent_stack.
  CHECK sy-tfill NE 0.
  DELETE parent_stack INDEX sy-tfill.
endform.                    " delete_parent_stack
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