Moving Cursor to Next row by pressing Enter in Classical ALV

This event will run when the user edits the column field then press the enter button.
It is used for The edited ALV Grid.

*&---------------------------------------------------------------------*
*& This code snippet shows how to use the classical ALV grid to
*&   perform the excel like feature: Move cursor to next row by
*&   pressing enter
*&---------------------------------------------------------------------*


REPORT ZTEST_NP_GRID_EDIT.

*
* Data Declration

TYPE-POOLS: SLIS.
*
TYPES: BEGIN OF TY_SFLIGHT.
INCLUDE TYPE SFLIGHT.
TYPES: BOX TYPE CHAR1,
     END  OF TY_SFLIGHT.
*
*
DATA: GT_SFLIGHT TYPE TABLE OF TY_SFLIGHT.
DATA: GS_LAYOUT  TYPE SLIS_LAYOUT_ALV.
DATA: LT_EVTS    TYPE SLIS_T_EVENT,
    LA_EVTS    LIKE LINE OF LT_EVTS.
*
DATA: GS_REPORT TYPE SY-CPROG,
    GS_TITLE  TYPE LVC_TITLE.

*
* Start of Selection
START-OF-SELECTION.
*
* Report
  GS_REPORT = SY-CPROG.
GS_TITLE  = 'Move Cursor to next row by pressing Enter'.


*
* Selection.
  SELECT * FROM SFLIGHT
       INTO CORRESPONDING FIELDS OF TABLE GT_SFLIGHT.

*
* Layout
  GS_LAYOUT-EDIT = 'X'.

*
* Event for Data Changed
  LA_EVTS-NAME = 'DATA_CHANGED'.
 LA_EVTS-FORM = 'GET_DATA_CHANGED'.
 APPEND LA_EVTS TO LT_EVTS.

*
* Call ABAP List Viewer (ALV)
  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
  EXPORTING
    I_GRID_TITLE       = GS_TITLE
    I_CALLBACK_PROGRAM = GS_REPORT
    I_STRUCTURE_NAME   = 'SFLIGHT'
    IS_LAYOUT          = GS_LAYOUT
    IT_EVENTS          = LT_EVTS
  TABLES
    T_OUTTAB           = GT_SFLIGHT.

*
*&---------------------------------------------------------------------*
*&      Form  get_data_changed
*&---------------------------------------------------------------------*
*       Here we will get the current cell and than add 1 to it to move
*         to next row. Than we will call the method to set the new row
*----------------------------------------------------------------------*
FORM GET_DATA_CHANGED USING RR_DATA_CHANGED
      TYPE REF TO CL_ALV_CHANGED_DATA_PROTOCOL.
*
DATA: LO_GRID TYPE REF TO CL_GUI_ALV_GRID.
*
DATA: LE_ROW     TYPE I,
      LE_VALUE   TYPE C,
      LE_COL     TYPE I,
      LES_ROW_ID TYPE LVC_S_ROW,
      LES_COL_ID TYPE LVC_S_COL,
      LES_ROW_NO TYPE LVC_S_ROID.

*
* Get the ALV Object reference
  CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
  IMPORTING
    E_GRID = LO_GRID.

*
* Get the Current Cell
  CALL METHOD LO_GRID->GET_CURRENT_CELL
  IMPORTING
    E_ROW     = LE_ROW
    E_VALUE   = LE_VALUE
    E_COL     = LE_COL
    ES_ROW_ID = LES_ROW_ID
    ES_COL_ID = LES_COL_ID
    ES_ROW_NO = LES_ROW_NO.

*
* Set to the next cell
  DESCRIBE TABLE  GT_SFLIGHT LINES SY-INDEX.
LES_ROW_ID-INDEX  = LES_ROW_ID-INDEX  + 1.
LES_ROW_NO-ROW_ID = LES_ROW_NO-ROW_ID + 1.
IF LES_ROW_ID-INDEX LE SY-INDEX.
  CALL METHOD LO_GRID->SET_CURRENT_CELL_VIA_ID
    EXPORTING
      IS_ROW_ID    = LES_ROW_ID
      IS_COLUMN_ID = LES_COL_ID
      IS_ROW_NO    = LES_ROW_NO.
ENDIF.

ENDFORM.                    "get_data_changed

source : http://help-abap.blogspot.com/2008/09/moving-cursor-to-next-row-by-pressing.html