Handle user entry in a cell

Question

Hello;
i have implemented the event of data entry in a cell by method handle_data_changed. After the process i want to clear the entry if it s not correct but the data stays fixed in the cell. What should i clear?
Thx
Ai

Answer 1

Hello Ali
Please make a copy of sample report BCALV_EDIT_03 and add the following coding (surrounded by
$Comment) in the event handler method HANLDE_DATA_CHANGED: 
  method handle_data_changed.
    data: ls_good type lvc_s_modi.
   error_in_data = space.
semantic checks
Identify columns which were changed and check input
against output table gt_outtab or other new input values of one row.
Table er_data_changed->mt_good_cells holds all cells that
are valid according to checks against their DDIC data.
No matter in which order the input was made this table is
ordered by rows (row_id). For each row, the entries are
sorted by columns according to their order in the fieldcatalog
(not the defined order using field COL_POS but the order
given by the position of the record in the fieldcatalog).
The order is relevant if new inputs in several columns of
the same row are dependent. In this example,
method 'ch_new_plane_v_new_seatsocc' needs only to be called
once since we know that the corresponding check is already done
when checking column PLANETYPE (see also method 'check_seatsocc').
*§5.Loop over table MT_GOOD_CELLS to check all values that are
  valid due to checks according to information of the DDIC.
    loop at er_data_changed->mt_good_cells into ls_good.
      case ls_good-fieldname.
check if column PLANETYPE of this row was changed
        when 'PLANETYPE'.
          call method check_planetype
                 exporting
                    ps_good_planetype = ls_good
                    pr_data_changed   = er_data_changed.
check if column SEATSOCC of this row was changed
        when 'SEATSOCC'.
          call method check_seatsocc
                 exporting
                    ps_good         = ls_good
                    pr_data_changed = er_data_changed.
      endcase.
    endloop.
*§7.Display application log if an error has occured.
    if error_in_data eq 'X'.
       call method er_data_changed->display_protocol.
*$Comment: Reset the value of the cell containing false values
       CALL METHOD er_data_changed->modify_cell
         EXPORTING
           I_ROW_ID    = ls_good-row_id
          I_TABIX     =
           I_FIELDNAME = ls_good-fieldname
           i_value     = ' '.  " clear fault value
*$Comment          
    endif.
  endmethod.[/code]
Call the report and change a single plane type (e.g. from 747-400 to 747-401) and then press ENTER.
Regards
   Uwe