F4 help for REUSE ALV grid

Question

Hi,
I am doing an ALV report using REUSE_ALV_GRID_DISPLAY . This is my requirement
If user press F4 in field in WERKS then i need to get values from table T001W and also from my custom table YT001W and display, so user can select from the f4 list.
How to do this.
Your help is appreciated
Sa_R

Answer 1

DATA : alvgrid TYPE REF TO cl_gui_alv_grid,
custom_container TYPE REF TO cl_gui_custom_container,
fieldcatalog TYPE lvc_t_fcat.
table to contain fields that require f4...............................
DATA : lt_f4 TYPE lvc_t_f4 WITH HEADER LINE.
ok_code declaration...................................................
DATA : ok_code TYPE sy-ucomm.
Tables declaration....................................................
TABLES : zaemp.
Types declaration.....................................................
TYPES : BEGIN OF ty_emp,
code LIKE zaemp-code,
designation LIKE zaemp-designation,
END OF ty_emp.
Internal table declaration............................................
DATA : i_emp TYPE TABLE OF ty_emp.
Workarea declaration..................................................
DATA : wa_emp TYPE ty_emp.
Selection screen parameters...........................................
SELECT-OPTIONS : s_code FOR zaemp-code.
CLASS lcl_event_handler DEFINITION
CLASS lcl_event_handler DEFINITION.
PUBLIC SECTION.
METHODS :
handle_on_f1 FOR EVENT onf1 OF cl_gui_alv_grid
IMPORTING e_fieldname es_row_no er_event_data,
handle_on_f4 for event onf4 of cl_gui_alv_grid
importing e_fieldname es_row_no er_event_data
ENDCLASS.
CLASS lcl_event_handler IMPLEMENTATION
CLASS lcl_event_handler IMPLEMENTATION.
METHOD handle_on_f1.
custom f1 help for code field.......................................
IF e_fieldname = 'code'.
CALL SCREEN 3001.
ENDIF.
to prevent processing of standard f1 help............................
er_event_data->m_event_handled = 'X'.
ENDMETHOD.
Method handle_on_f4.
standard f4 help will be invoked......................................
endmethod.
ENDCLASS.
start of selection....................................................
START-OF-SELECTION.
SELECT code designation FROM zaemp
INTO CORRESPONDING FIELDS OF TABLE i_emp
WHERE code IN s_code.
CALL SCREEN 3000.
*& Module STATUS_3000 OUTPUT
text
MODULE status_3000 OUTPUT.
SET PF-STATUS 'ZTOOL'.
SET TITLEBAR 'ZTITLE'.
IF alvgrid IS INITIAL.
CREATE OBJECT custom_container
EXPORTING
container_name = 'ZCONTAINER'.
CREATE OBJECT alvgrid
EXPORTING
i_parent = custom_container.
PERFORM prepare_f4.
CALL METHOD alvgrid->register_f4_for_fields
EXPORTING
it_f4 = lt_f4[]
creating instance for event handler..................................
DATA : event_handler TYPE REF TO lcl_event_handler.
CREATE OBJECT event_handler.
SET HANDLER event_handler->handle_on_f1 FOR alvgrid.
SET HANDLER event_handler->handle_on_f4 FOR alvgrid.
preparing field catalog..............................................
PERFORM prepare_fieldcatalog CHANGING fieldcatalog.
CALL METHOD alvgrid->set_table_for_first_display
EXPORTING
I_BYPASSING_BUFFER =
I_BUFFER_ACTIVE =
I_CONSISTENCY_CHECK =
I_STRUCTURE_NAME =
IS_VARIANT =
I_SAVE =
I_DEFAULT = 'X'
IS_LAYOUT =
IS_PRINT =
IT_SPECIAL_GROUPS =
IT_TOOLBAR_EXCLUDING =
IT_HYPERLINK =
IT_ALV_GRAPHICS =
IT_EXCEPT_QINFO =
CHANGING
it_outtab = i_emp
it_fieldcatalog = fieldcatalog
IT_SORT =
IT_FILTER =
EXCEPTIONS
INVALID_PARAMETER_COMBINATION = 1
PROGRAM_ERROR = 2
TOO_MANY_LINES = 3
others = 4
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDIF.
ENDMODULE. " STATUS_3000 OUTPUT
preparing field catalog...............................................
FORM prepare_fieldcatalog CHANGING i_fieldcatalog TYPE lvc_t_fcat.
DATA : ls_fcat TYPE lvc_s_fcat.
ls_fcat-fieldname = 'code'.
ls_fcat-ref_table = 'zaemp'.
ls_fcat-coltext = 'EMPLOYEE ID'.
APPEND ls_fcat TO i_fieldcatalog.
CLEAR ls_fcat.
ls_fcat-fieldname = 'designation'.
ls_fcat-ref_table = 'zaemp'.
ls_fcat-coltext = 'EMPLOYEE NAME'.
APPEND ls_fcat TO i_fieldcatalog.
ENDFORM.
*& Module USER_COMMAND_3000 INPUT
text
MODULE user_command_3000 INPUT.
CASE ok_code.
WHEN 'BACK'.
LEAVE TO SCREEN 0.
WHEN 'EXIT'.
LEAVE PROGRAM.
ENDCASE.
ENDMODULE. " USER_COMMAND_3000 INPUT
*& Module USER_COMMAND_3001 INPUT
text
MODULE user_command_3001 INPUT.
CASE ok_code.
WHEN 'SAVE'.
LEAVE TO SCREEN 0.
WHEN 'BACK'.
LEAVE TO SCREEN 0.
ENDCASE.
ENDMODULE. " USER_COMMAND_3001 INPUT
*& Module STATUS_3001 OUTPUT
text
MODULE status_3001 OUTPUT.
SET PF-STATUS 'GUI'.
SET TITLEBAR 'TITLE'.
ENDMODULE. " STATUS_3001 OUTPUT
preparing fields to be registered for f4 help.........................
FORM prepare_f4.
lt_f4-fieldname = 'designation'.
lt_f4-register = 'X'.
lt_f4-getbefore = 'X'.
lt_f4-chngeafter = 'X'.
APPEND lt_f4.
ENDFORM.
Hi
For creating the F4 Help see the sample code and do accordingly
See the following ex:
TYPES: BEGIN OF TY_MBLNR,
MBLNR LIKE MKPF-MBLNR,
END OF TY_MBLNR.
DATA: IT_MBLNR TYPE STANDARD TABLE OF TY_MBLNR WITH HEADER LINE.
data: it_ret like ddshretval occurs 0 with header line.
At selection-screen on value-request for s_mat-low.
Select MBLNR from mkpf into table it_mblnr.
CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
EXPORTING
DDIC_STRUCTURE = ' '
RETFIELD = 'MBLNR'
PVALKEY = ' '
DYNPPROG = ' '
DYNPNR = ' '
DYNPROFIELD = ' '
STEPL = 0
WINDOW_TITLE =
VALUE = ' '
VALUE_ORG = 'S'
MULTIPLE_CHOICE = ' '
DISPLAY = ' '
CALLBACK_PROGRAM = ' '
CALLBACK_FORM = ' '
MARK_TAB =
IMPORTING
USER_RESET =
TABLES
VALUE_TAB = IT_MBLNR
FIELD_TAB =
RETURN_TAB = IT_RET
DYNPFLD_MAPPING =
EXCEPTIONS
PARAMETER_ERROR = 1
NO_VALUES_FOUND = 2
OTHERS = 3
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
IF SY-SUBRC = 0.
read table it_ret index 1.
move it_ret-fieldval to S_mat-low.
ENDIF.
Go through the test program.
REPORT Ztest_HELP .
TABLES : MARA.
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
PARAMETERS : P_MATNR(10) TYPE C.
SELECTION-SCREEN END OF BLOCK B1.
DATA : BEGIN OF ITAB OCCURS 0,
MATNR TYPE MATNR,
END OF ITAB.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR P_MATNR.
SELECT MATNR
FROM MARA
INTO TABLE ITAB
UP TO 10 ROWS.
CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
EXPORTING
RETFIELD = 'MATERIAL NUMBER'
DYNPPROG = SY-REPID
DYNPNR = SY-DYNNR
DYNPROFIELD = 'P_MATNR'
VALUE_ORG = 'S'
TABLES
VALUE_TAB = ITAB
EXCEPTIONS
PARAMETER_ERROR = 1
NO_VALUES_FOUND = 2
OTHERS = 3.
F4 help -- on editable alv field.
The specified item was not found.
Message was edited by:
        Karthikeyan Pandurangan