How to identify the modified rows in ALV grid in OO

Question

Hello All,
I have strange problem and i don't know how to solve it?
I have ALV grid and in that ALV grid i have two buttons 'CONT' and 'ALLOC', when the user press 'ALLOC' button i will give a popup to make the user to enter some value.
After entering the value i will do some calicualtions and i will distribute the amount in the fields of ALV grid and i should update the ALVGRID.
Normally we can use CALL METHOD ME->REFRESH_TABLE_DISPLAY.( I have already checked by using this method and it worked fine)
Here is the way my program look like
ALVTREE1
ALVTREE2
             |----
ALVGRID
The problem is when i press the other button CONT i am unable to know what values exist in ALVGRID.
How can i find these distributed amount in ALV?
I hope i am clear while explaining problem.
Here is  the required code:
  method handle_user_command.
    data: lt_fields       type table of sval,
          ls_field        type sval,
          ls_fieldcatalog type lvc_s_fcat,
          ls_merkpl       type zvhf_merkpl,
          lv_month(2)     type n ,
          lv_year(4)      type n ,
          lv_spmon        type zvhf_allocation-spmon,
          lv_value        type p.
    field-symbols: <fs> type any,
                   <ls_merkpl> type zvhf_merkpl.
    case  e_ucomm.
      when 'CNT'.
        call method gcl_gui_alv_grid->check_changed_data.
        call method dailogbox_container->set_visible
          exporting
            visible = space.
        call method gcl_gui_alv_tree2->frontend_update.
        call method gcl_gui_alv_tree2->update_calculations.
        clear: gt_merkpl.
      when 'ALCT'.
Popup to get the values enterd by the user
        ls_field-tabname   = 'DD02V'.
        ls_field-fieldname = 'DDTEXT'.
        append ls_field to lt_fields.
        call function 'POPUP_GET_VALUES'
          exporting
            popup_title     = 'Enter value'
            start_column    = '1'
            start_row       = '1'
          tables
            fields          = lt_fields
          exceptions
            error_in_fields = 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.
        elseif sy-subrc = 0.
          read table lt_fields into ls_field index 1.
          if sy-subrc = 0.
            gv_value = ls_field-value.
Read the table zvhf_allocation with nodekey  in order to get percentages
            select * from zvhf_allocation into table gt_allocation
                               where dvkbur = gs_node_info-nodename.
Read gt_merkpl in order to get existing line in ALV grid
            loop at  gt_merkpl into ls_merkpl.
*Read FCAT inorder to find the field and move proprtinate value
              loop at gt_fieldcatlog3 into ls_fieldcatalog.
*Split is required to match ZVHF_ALLOCATION-SPMON  with screen text and to proprtinate the value
                split ls_fieldcatalog-scrtext_l at '.' into
                      lv_month lv_year.
                concatenate lv_year lv_month into lv_spmon.
Check whether an entry exist or not in ZVHF_allocation
                read table gt_allocation into gs_allocation
                                          with key spmon = lv_spmon binary search.
*If an entry exist proprtinate the value as enterd in table
                if sy-subrc = 0.
                  lv_value  = gv_value * gs_allocation-prozent.
                  lv_value = lv_value / 100.
                  perform assign_value using     ls_fieldcatalog-fieldname lv_value
                                       changing  ls_merkpl.
                  modify gt_merkpl from ls_merkpl.
                endif.
              endloop.
             CALL METHOD gcl_gui_alv_grid->frontend_update.
              call method gcl_gui_alv_grid->refresh_table_display
                exceptions
                  finished = 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.
            endloop.
          endif.
        endif.
    endcase.
  endmethod.                    "handle_user_command
If you have any further questions please let me know.
Regards,
Lisa

Answer 1

Hello Vijay,
Thanks for you reply,
The event data_changed is not working because i called method refresh_table_display. So the event changed will not be raised after i press button CONT
If i didn't call this method then i can see the value enterd by the user in ALV grid.
So, do you have an more ideas.
Regards,
Lisa