This document contains ABAP code for displaying an ALV grid report. It defines data structures for storing purchase order data and field catalog attributes. Methods are used to retrieve sample data, build the field catalog, layout, and display the ALV grid. Additional code allows setting specific field styles, like disabling editing for a price field if the value is over 10. The code also includes methods for initializing cell editing status based on a field, and toggling the editing mode.

1. TABLES: ekko.
TYPE-POOLS: slis. "ALV Declarations
*Data Declaration
*----------------
TYPES: BEGIN OF t_ekko,
ebeln TYPE ekpo-ebeln,
ebelp TYPE ekpo-ebelp,
statu TYPE ekpo-statu,
aedat TYPE ekpo-aedat,
matnr TYPE ekpo-matnr,
menge TYPE ekpo-menge,
meins TYPE ekpo-meins,
netpr TYPE ekpo-netpr,
peinh TYPE ekpo-peinh,
field_style TYPE lvc_t_styl, "FOR DISABLE
END OF t_ekko.
DATA: it_ekko TYPE STANDARD TABLE OF t_ekko INITIAL SIZE 0,
wa_ekko TYPE t_ekko.
*ALV data declarations
DATA: fieldcatalog TYPE slis_t_fieldcat_alv WITH HEADER LINE.
DATA: it_fieldcat TYPE lvc_t_fcat, "slis_t_fieldcat_alv WITH HEADER LINE,
wa_fieldcat TYPE lvc_s_fcat,
gd_tab_group TYPE slis_t_sp_group_alv,
gd_layout TYPE lvc_s_layo, "slis_layout_alv,
gd_repid LIKE sy-repid.
************************************************************************
*Start-of-selection.
START-OF-SELECTION.
PERFORM data_retrieval.
PERFORM set_specific_field_attributes.
PERFORM build_fieldcatalog.
PERFORM build_layout.
PERFORM display_alv_report.
*&---------------------------------------------------------------------*
*& Form BUILD_FIELDCATALOG

2. *&---------------------------------------------------------------------*
* Build Fieldcatalog for ALV Report
*----------------------------------------------------------------------*
FORM build_fieldcatalog.
wa_fieldcat-fieldname = 'EBELN'.
wa_fieldcat-scrtext_m = 'Purchase Order'.
wa_fieldcat-col_pos = 0.
wa_fieldcat-outputlen = 10.
wa_fieldcat-emphasize = 'X'.
wa_fieldcat-key = 'X'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'EBELP'.
wa_fieldcat-scrtext_m = 'PO Item'.
wa_fieldcat-col_pos = 1.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'STATU'.
wa_fieldcat-scrtext_m = 'Status'.
wa_fieldcat-col_pos = 2.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'AEDAT'.
wa_fieldcat-scrtext_m = 'Item change date'.
wa_fieldcat-col_pos = 3.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'MATNR'.
wa_fieldcat-scrtext_m = 'Material Number'.
wa_fieldcat-col_pos = 4.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.

3. wa_fieldcat-fieldname = 'MENGE'.
wa_fieldcat-scrtext_m = 'PO quantity'.
wa_fieldcat-col_pos = 5.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'MEINS'.
wa_fieldcat-scrtext_m = 'Order Unit'.
wa_fieldcat-col_pos = 6.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'NETPR'.
wa_fieldcat-scrtext_m = 'Net Price'.
wa_fieldcat-edit = 'X'. "sets whole column to be editable
wa_fieldcat-col_pos = 7.
wa_fieldcat-outputlen = 15.
wa_fieldcat-datatype = 'CURR'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'PEINH'.
wa_fieldcat-scrtext_m = 'Price Unit'.
wa_fieldcat-col_pos = 8.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
ENDFORM. " BUILD_FIELDCATALOG
*&---------------------------------------------------------------------*
*& Form BUILD_LAYOUT
*&---------------------------------------------------------------------*
* Build layout for ALV grid report
*----------------------------------------------------------------------*
FORM build_layout.
* Set layout field for field attributes(i.e. input/output)
gd_layout-stylefname = 'FIELD_STYLE'.

4. gd_layout-zebra = 'X'.
ENDFORM. " BUILD_LAYOUT
*&---------------------------------------------------------------------*
*& Form DISPLAY_ALV_REPORT
*&---------------------------------------------------------------------*
* Display report using ALV grid
*----------------------------------------------------------------------*
FORM display_alv_report.
gd_repid = sy-repid.
* call function 'REUSE_ALV_GRID_DISPLAY'
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'
EXPORTING
i_callback_program = gd_repid
* i_callback_user_command = 'USER_COMMAND'
is_layout_lvc = gd_layout
it_fieldcat_lvc = it_fieldcat
i_save = 'X'
TABLES
t_outtab = it_ekko
EXCEPTIONS
program_error = 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.
ENDFORM. " DISPLAY_ALV_REPORT
*&---------------------------------------------------------------------*
*& Form DATA_RETRIEVAL
*&---------------------------------------------------------------------*
* Retrieve data form EKPO table and populate itab it_ekko
*----------------------------------------------------------------------*

5. FORM data_retrieval.
SELECT ebeln ebelp statu aedat matnr menge meins netpr peinh
UP TO 10 ROWS
FROM ekpo
INTO CORRESPONDING FIELDS OF TABLE it_ekko.
ENDFORM. " DATA_RETRIEVAL
*&---------------------------------------------------------------------*
*& Form set_specific_field_attributes
*&---------------------------------------------------------------------*
* populate FIELD_STYLE table with specific field attributes
*----------------------------------------------------------------------*
form set_specific_field_attributes .
DATA ls_stylerow TYPE lvc_s_styl .
DATA lt_styletab TYPE lvc_t_styl .
* Populate style variable (FIELD_STYLE) with style properties
*
* The NETPR field/column has been set to editable in the fieldcatalog...
* The following code sets it to be disabled(display only) if 'NETPR'
* is gt than 10.
LOOP AT it_ekko INTO wa_ekko.
IF wa_ekko-netpr GT 10.
ls_stylerow-fieldname = 'NETPR' .
ls_stylerow-style = cl_gui_alv_grid=>mc_style_disabled.
"set field to disabled
APPEND ls_stylerow TO wa_ekko-field_style.
MODIFY it_ekko FROM wa_ekko.
ENDIF.
ENDLOOP.
endform. " set_specific_field_attributes
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
DATA:
ok_code LIKE sy-ucomm,

6. save_ok LIKE sy-ucomm,
g_container TYPE scrfname VALUE 'BCALV_GRID_DEMO_0100_CONT1',
grid1 TYPE REF TO cl_gui_alv_grid,
g_custom_container TYPE REF TO cl_gui_custom_container,
gs_layout TYPE lvc_s_layo,
g_max TYPE i VALUE 100.
*§1.Extend your output table for a field, e.g., CELLTAB, that holds
* information about the edit status of each cell for the
* corresponding row (the table type is SORTED!).
DATA: BEGIN OF gt_outtab OCCURS 0. "with header line
INCLUDE STRUCTURE sflight.
DATA: celltab TYPE lvc_t_styl.
DATA: END OF gt_outtab.
*---------------------------------------------------------------------*
* MAIN *
*---------------------------------------------------------------------*
CALL SCREEN 100.
*---------------------------------------------------------------------*
* MODULE PBO OUTPUT *
*---------------------------------------------------------------------*
MODULE pbo OUTPUT.
SET PF-STATUS 'MAIN100'.
SET TITLEBAR 'MAIN100'.
IF g_custom_container IS INITIAL.
CREATE OBJECT g_custom_container
EXPORTING container_name = g_container.
CREATE OBJECT grid1
EXPORTING i_parent = g_custom_container.
PERFORM select_data_and_init_style.
*§3.Provide the fieldname of the celltab field by using field
* STYLEFNAME of the layout structure.
gs_layout-stylefname = 'CELLTAB'.
CALL METHOD grid1->set_table_for_first_display
EXPORTING
i_structure_name = 'SFLIGHT'

7. is_layout = gs_layout
CHANGING
it_outtab = gt_outtab[].
ENDIF.
ENDMODULE. "pbo OUTPUT
*---------------------------------------------------------------------*
* MODULE PAI INPUT *
*---------------------------------------------------------------------*
MODULE pai INPUT.
save_ok = ok_code.
CLEAR ok_code.
CASE save_ok.
WHEN 'EXIT'.
PERFORM exit_program.
WHEN 'SWITCH'.
PERFORM switch_edit_mode.
WHEN OTHERS.
* do nothing
ENDCASE.
ENDMODULE. "pai INPUT
*---------------------------------------------------------------------*
* FORM EXIT_PROGRAM *
*---------------------------------------------------------------------*
FORM exit_program.
LEAVE PROGRAM.
ENDFORM. "exit_program
*&---------------------------------------------------------------------*
*& Form SELECT_DATA_AND_INIT_STYLE
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
* --> p1 text
* <-- p2 text
*----------------------------------------------------------------------*
FORM select_data_and_init_style.
DATA: lt_sflight TYPE TABLE OF sflight WITH HEADER LINE,
lt_celltab TYPE lvc_t_styl,
l_index TYPE i.
SELECT * FROM sflight INTO TABLE lt_sflight UP TO g_max ROWS.

8. * move corresponding fields from lt_sflight to gt_outtab
LOOP AT lt_sflight.
MOVE-CORRESPONDING lt_sflight TO gt_outtab.
APPEND gt_outtab.
ENDLOOP.
*§2.After selecting data, set edit status for each row in a loop
* according to field SEATSMAX.
LOOP AT gt_outtab.
l_index = sy-tabix.
REFRESH lt_celltab.
IF gt_outtab-seatsmax GE 300.
PERFORM fill_celltab USING 'RW'
CHANGING lt_celltab.
ELSE.
PERFORM fill_celltab USING 'RO'
CHANGING lt_celltab.
ENDIF.
*§2c.Copy your celltab to the celltab of the current row of gt_outtab.
INSERT LINES OF lt_celltab INTO TABLE gt_outtab-celltab.
MODIFY gt_outtab INDEX l_index.
ENDLOOP.
ENDFORM. " SELECT_DATA_AND_INIT_STYLE
*&---------------------------------------------------------------------*
*& Form FILL_CELLTAB
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
* <--P_PT_CELLTAB text
*----------------------------------------------------------------------*
FORM fill_celltab USING value(p_mode)
CHANGING pt_celltab TYPE lvc_t_styl.
DATA: ls_celltab TYPE lvc_s_styl,
l_mode TYPE raw4.
* This forms sets the style of column 'PRICE' editable
* according to 'p_mode' and the rest to read only either way.

9. IF p_mode EQ 'RW'.
*§2a.Use attribute CL_GUI_ALV_GRID=>MC_STYLE_ENABLED to set a cell
* to status "editable".
l_mode = cl_gui_alv_grid=>mc_style_enabled.
ELSE. "p_mode eq 'RO'
*§2b.Use attribute CL_GUI_ALV_GRID=>MC_STYLE_DISABLED to set a cell
* to status "non-editable".
l_mode = cl_gui_alv_grid=>mc_style_disabled.
ENDIF.
ls_celltab-fieldname = 'CARRID'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'CONNID'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'FLDATE'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'PRICE'.
ls_celltab-style = l_mode.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'CURRENCY'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'PLANETYPE'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'SEATSMAX'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'SEATSOCC'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.

10. INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'PAYMENTSUM'.
ls_celltab-style = cl_gui_alv_grid=>mc_style_disabled.
INSERT ls_celltab INTO TABLE pt_celltab.
ENDFORM. " FILL_CELLTAB
*&---------------------------------------------------------------------*
*& Form SWITCH_EDIT_MODE
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
* --> p1 text
* <-- p2 text
*----------------------------------------------------------------------*
FORM switch_edit_mode.
IF grid1->is_ready_for_input( ) EQ 0.
* set edit enabled cells ready for input
CALL METHOD grid1->set_ready_for_input
EXPORTING
i_ready_for_input = 1.
ELSE.
* lock edit enabled cells against input
CALL METHOD grid1->set_ready_for_input
EXPORTING
i_ready_for_input = 0.
ENDIF.
ENDFORM. " SWITCH_EDIT_MODE