Editable Hierarchical ALV

Question

There is a requirement from client that
They want to see an hierarchical ALV. This ALV needs to be editable in the line item level for the balnk lines. On click of a button, a pop window will appear in which if if they enter say 5 and the customer code then 5 blank lines should be appended at the customer's line item level where the user can enter values. Is this possible. Will the inserted/ appended lines get refreshed on the ALV. For eg:
represent the blank lines)
Header--> Customer Code Customer Name
011101 XYZ
Item--> Material Quantity Unit Amount
14589 125.00 KG 145.50
12569 45.00 KG 100.00
15899 105.00 KG 120.50
PLZ Help!

Answer 1

Hi,
I've done similar thing. Here is the code for my method for handling double click.
METHOD handle_node_double_click.
    CALL METHOD sender->get_outtab_line
      EXPORTING
        i_node_key     = node_key
      IMPORTING
        e_outtab_line  = gs_idoc_s
      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.
* Get data
* <code for changing value>
      CALL METHOD sender->change_node
        EXPORTING
          i_node_key     = node_key
          i_outtab_line  = gs_idoc_s
        EXCEPTIONS
          node_not_found = 1
          OTHERS         = 2.
      READ TABLE gt_idoc_s WITH KEY pos = gs_idoc_s-pos
        TRANSPORTING NO FIELDS.
      MODIFY gt_idoc_s FROM gs_idoc_s
        INDEX sy-tabix TRANSPORTING value_low value_high.
      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->frontend_update.
    ENDIF.
  ENDMETHOD.                    "handle_node_double_click
The important methods are get_outtab_line. change_node and frontend_update.