7/14/2021
ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_
PO_CUST
How to Mount and Use exFAT Drive on Ubuntu …
Recently, I want to learn more about classic BADI. I haven't played BADI
screen enhancement before, so I decided to play it.
This screen enhancement mainly uses two BADIs: ME_GUI_PO_CUST and
ME_PROCESS_PO_CUST
There are examples for these two BADIs, you can click GoTo->Sample code>Display at se18 to view, or you can directly view the classes
CL_EXM_IM_ME_GUI_PO_CUST and CL_EXM_IM_ME_PROCESS_PO_CUST
at SE24
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Now we add our own subscreen to the PO header, SAP's example provides
adding subscreen to the item.
Step 1: Create Function Group
Build a Function Group modeled on the Function Group MEPOBADIEX
The Function Group I built is shown below
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Step 2: Build a screen in the Function Group, the screen
number is whatever
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Add the variables corresponding to the screen in the TOP, here I use tables
directly.
Step 3: Create an implementation for BADI
ME_GUI_PO_CUST
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Add in Public SectionTYPE-POOLS mmmfd .
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Step 4: In Method IF_EX_ME_GUI_PO_CUST~SUBSCRIBE,
add the setting code of custom subscreen
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~subscribe.
2.
DATA: lw_subscribers TYPE mepo_subscribers.
3.
4. * we want to add a customer subscreen on the Header tab
5.
CHECK im_application = 'PO'.
6.
CHECK im_element
= 'HEADER'.
7.
8.
CLEAR lw_subscribers.
9.
lw_subscribers-name = subscreen1.
10.
lw_subscribers-dynpro = '0100'.
11.
lw_subscribers-program = 'SAPLZCI_EKKODB'.
12.
lw_subscribers-struct_name = 'CI_EKKODB'.
13.
lw_subscribers-label = 'Zero test2'.
14.
lw_subscribers-position = 11.
15.
lw_subscribers-height = 8.
16.
APPEND lw_subscribers TO re_subscribers.
17. ENDMETHOD.
1
2
METHOD if_ex_me_gui_po_cust~subscribe.
DATA: lw_subscribers TYPE mepo_subscribers.
3
4
* we want to add a customer subscreen on the Header tab
5
CHECK im_application = 'PO'.
6
CHECK im_element
= 'HEADER'.
7
8
CLEAR lw_subscribers.
9
lw_subscribers-name = subscreen1.
10
lw_subscribers-dynpro = '0100'.
11
lw_subscribers-program = 'SAPLZCI_EKKODB'.
12
lw_subscribers-struct_name = 'CI_EKKODB'.
13
lw_subscribers-label = 'Zero test2'.
14
lw_subscribers-position = 11.
15
lw_subscribers-height = 8.
16
APPEND lw_subscribers TO re_subscribers.
17
ENDMETHOD.
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Step 5: In
IF_EX_ME_GUI_PO_CUST~MAP_DYNPRO_FIELDS, add
code to associate the field name with its digital number
[plain] view plaincopyprint?
1. FIELD-SYMBOLS: <mapping> LIKE LINE OF ch_mapping.
2.
3. LOOP AT ch_mapping ASSIGNING <mapping>.
4.
CASE <mapping>-fieldname.
5.
WHEN 'LV_TEST1'. <mapping>-metafield = mmmfd_cust_01.
6.
WHEN 'LV_TEST2'. <mapping>-metafield = mmmfd_cust_02.
7.
WHEN 'LV_TEST3'. <mapping>-metafield = mmmfd_cust_03.
8.
ENDCASE.
9. ENDLOOP.
1
FIELD-SYMBOLS: <mapping> LIKE LINE OF ch_mapping.
2
3
4
LOOP AT ch_mapping ASSIGNING <mapping>.
CASE <mapping>-fieldname.
5
WHEN 'LV_TEST1'. <mapping>-metafield = mmmfd_cust_01.
6
WHEN 'LV_TEST2'. <mapping>-metafield = mmmfd_cust_02.
7
WHEN 'LV_TEST3'. <mapping>-metafield = mmmfd_cust_03.
8
9
ENDCASE.
ENDLOOP.
It is estimated that only 9 Custom fields can be added because I am in
TYPE-POOLSmmmfd sees the largest one is mmfd_cust_09,
Here you can also get some standard fields on the custom subscreen.
After the above five steps, we can see the custom subscreen on ME23N, but
it is still not visible on ME21N and ME22N...Why is this, I still don't know.
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Step 6: Create an implementation for BADI
ME_PROCESS_PO_CUST
Join in the Public SectionTYPE-POOLS mmmfd .
Step 7: Add code in Method
IF_EX_ME_PROCESS_PO_CUST~FIELDSELECTION_HEADE
R, change the field status of table ch_fieldselection
'-' means hidden,'+' or'.' means editable,'*' means display
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1. METHOD if_ex_me_process_po_cust~fieldselection_header.
2.
DATA: lv_persistent TYPE mmpur_bool.
3.
FIELD-SYMBOLS: <fs> LIKE LINE OF ch_fieldselection.
4.
5.
DEFINE set_input.
6.
read table ch_fieldselection assigning <fs> with table key metafield = &1.
7.
if sy-subrc = 0.
8.
if im_header->is_changeable( ) = mmpur_yes.
9.
10.
11.
<fs>-fieldstatus = '+'.
else.
<fs>-fieldstatus = '*'.
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12.
endif.
13.
endif.
14.
END-OF-DEFINITION.
15.
16. * if the item is already on the database, we disallow to change field badi_bsgru
17.
lv_persistent = im_header->is_persistent( ).
18.
19.
set_input mmmfd_cust_01.
20.
set_input mmmfd_cust_02.
21.
set_input mmmfd_cust_03.
22.
23. ENDMETHOD.
1
METHOD if_ex_me_process_po_cust~fieldselection_header.
2
DATA: lv_persistent TYPE mmpur_bool.
3
FIELD-SYMBOLS: <fs> LIKE LINE OF ch_fieldselection.
4
5
DEFINE set_input.
6
read table ch_fieldselection assigning <fs> with table key metafield = &1.
7
if sy-subrc = 0.
8
if im_header->is_changeable( ) = mmpur_yes.
9
10
11
<fs>-fieldstatus = '+'.
else.
<fs>-fieldstatus = '*'.
12
endif.
13
endif.
14
END-OF-DEFINITION.
15
16
17
* if the item is already on the database, we disallow to change field badi_bsgru
lv_persistent = im_header->is_persistent( ).
18
19
set_input mmmfd_cust_01.
20
set_input mmmfd_cust_02.
21
set_input mmmfd_cust_03.
22
23
ENDMETHOD.
There are two points to note here:
1. im_header->is_changeable() can determine whether these fields are
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currently editable, and if they are, it will be'X'. For example, they are
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editable when they just entered TCODE ME21N, ME22N, but when they are
saved successfully by save It is temporarily unavailable to edit, press again
You can edit it by changing it back to the editing state, and this function
is implemented here.
2. im_header->is_persistent() can judge that when these fields have values
​in the database, it is'X'. When we write data into the table and don’t want it
to be modified, we can use this to judge, such as One field is set to ME21N
to be editable, ME22N is not editable.
After these seven steps, ME21N/ME22N/ME23N can see this custom
subscreen, but all self-built fields are editable. You must complete the
eighth step to display normally
Step 8: Call 2 modules in screen
These two modules are stored in the program below
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Note: If you do not call these two modules, none of the four methods below
BADI ME_GUI_PO_CUST will be triggered
TRANSPORT_FROM_MODEL
TRANSPORT_TO_DYNP
TRANSPORT_FROM_DYNP
TRANSPORT_TO_MODEL
Step 9: Add code in Method
IF_EX_ME_GUI_PO_CUST~TRANSPORT_FROM_MODEL
Pass the three self-built fields of the header to the attribute dynp_data_pho
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1. METHOD if_ex_me_gui_po_cust~transport_from_model.
2.
DATA:
lw_header
TYPE REF TO if_purchase_order_mm,
3.
lw_mepoheader
TYPE mepoheader,
4.
lw_customer
TYPE ci_ekkodb.
5. *--------------------------------------------------------------------*
6. * system asks to transport data from the business logic into the view
7. *--------------------------------------------------------------------*
8.
9.
IF im_name = subscreen1.
10. * is it an Header? im_model can be header or item.
11.
mmpur_dynamic_cast lw_header im_model.
12.
CHECK NOT lw_header IS INITIAL.
13. * transport standard fields
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lw_mepoheader = lw_header->get_data( ).
15. * store info for later use
16.
17.
MOVE-CORRESPONDING lw_mepoheader TO dynp_data_pbo.
ENDIF.
18.
19. ENDMETHOD.
1
2
METHOD if_ex_me_gui_po_cust~transport_from_model.
DATA:
lw_header
TYPE REF TO if_purchase_order_mm,
3
lw_mepoheader
TYPE mepoheader,
4
lw_customer
TYPE ci_ekkodb.
5
*--------------------------------------------------------------------*
6
* system asks to transport data from the business logic into the view
7
*--------------------------------------------------------------------*
8
9
10
IF im_name = subscreen1.
* is it an Header? im_model can be header or item.
11
mmpur_dynamic_cast lw_header im_model.
12
CHECK NOT lw_header IS INITIAL.
13
14
15
16
17
* transport standard fields
lw_mepoheader = lw_header->get_data( ).
* store info for later use
MOVE-CORRESPONDING lw_mepoheader TO dynp_data_pbo.
ENDIF.
18
19
ENDMETHOD.
Step 10: Add code in Method
IF_EX_ME_GUI_PO_CUST~TRANSPORT_TO_DYNP
By calling FM:ZCI_EKKODB_PUSH the attribute
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~transport_to_dynp.
2.
3.
4.
5.
IF im_name = subscreen1.
CALL FUNCTION 'ZCI_EKKODB_PUSH'
EXPORTING
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6.
7.
ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
im_dynp_data = dynp_data_pbo.
ENDIF.
8. ENDMETHOD.
1
METHOD if_ex_me_gui_po_cust~transport_to_dynp.
2
3
4
5
IF im_name = subscreen1.
CALL FUNCTION 'ZCI_EKKODB_PUSH'
EXPORTING
6
im_dynp_data = dynp_data_pbo.
7
ENDIF.
8
ENDMETHOD.
Step 11: Add code in
IF_EX_ME_GUI_PO_CUST~TRANSPORT_FROM_DYNP
In the case of a PAI event, pass the value of the screen to the attribute
dynp_data_pai, and compare dynp_data_pbo withdynp_data_pai, confirm
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that the value of the self-built field has changed, set re_changed to'X', so
that IF_EX_ME_PROCESS_PO_CUST~PROCESS_HEADER will be triggered.
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~transport_from_dynp.
2.
3.
4.
5.
IF im_name = subscreen1.
CALL FUNCTION 'ZCI_EKKODB_POP'
IMPORTING
ex_dynp_data = dynp_data_pai.
6.
7.
ENDIF.
8.
9.
IF dynp_data_pai <> dynp_data_pbo.
10. * something has changed therefor we have to notify the framework
11. * to transport data to the model
12.
13.
re_changed = mmpur_yes.
ENDIF.
14. ENDMETHOD.
1
2
3
4
METHOD if_ex_me_gui_po_cust~transport_from_dynp.
IF im_name = subscreen1.
CALL FUNCTION 'ZCI_EKKODB_POP'
IMPORTING
5
ex_dynp_data = dynp_data_pai.
6
7
ENDIF.
8
9
IF dynp_data_pai <> dynp_data_pbo.
10
* something has changed therefor we have to notify the framework
11
* to transport data to the model
12
re_changed = mmpur_yes.
13
ENDIF.
14
ENDMETHOD.
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Step 12: Add code in
IF_EX_ME_GUI_PO_CUST~TRANSPORT_TO_MODEL, and
transfer the modified data to the bussiness object
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~transport_to_model.
2.
3.
DATA: lw_header
TYPE REF TO if_purchase_order_mm,
4.
lw_mepoheader
TYPE mepoheader,
5.
lw_customer
TYPE ci_ekkodb,
6.
lw_po_header_handle
TYPE REF TO cl_po_header_handle_mm.
7. *--------------------------------------------------------------------*
8. * data have to be transported to business logic
9. *--------------------------------------------------------------------*
10.
IF im_name = subscreen1.
11.
12. * is it an item? im_model can be header or item.
13.
mmpur_dynamic_cast lw_header im_model.
14.
CHECK NOT lw_header IS INITIAL.
15.
lw_mepoheader = lw_header->get_data( ).
16. * standard fields changed?
17.
IF dynp_data_pbo-lv_test1 <> dynp_data_pai-lv_test1
18.
OR dynp_data_pbo-lv_test2 <> dynp_data_pai-lv_test2
19.
OR dynp_data_pbo-lv_test3 <> dynp_data_pai-lv_test3.
20. * update standard fields
21.
lw_mepoheader-lv_test1 = dynp_data_pai-lv_test1.
22.
lw_mepoheader-lv_test2 = dynp_data_pai-lv_test2.
23.
lw_mepoheader-lv_test3 = dynp_data_pai-lv_test3.
24.
25.
26.
CALL METHOD lw_header->set_data
EXPORTING
27.
im_data = lw_mepoheader.
28.
29.
30.
ENDIF.
ENDIF.
31. ENDMETHOD.
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
METHOD if_ex_me_gui_po_cust~transport_to_model.
2
3
DATA: lw_header
TYPE REF TO if_purchase_order_mm,
4
lw_mepoheader
TYPE mepoheader,
5
lw_customer
TYPE ci_ekkodb,
6
lw_po_header_handle
TYPE REF TO cl_po_header_handle_mm.
7
*--------------------------------------------------------------------*
8
* data have to be transported to business logic
9
*--------------------------------------------------------------------*
10
IF im_name = subscreen1.
11
12
* is it an item? im_model can be header or item.
13
mmpur_dynamic_cast lw_header im_model.
14
CHECK NOT lw_header IS INITIAL.
15
lw_mepoheader = lw_header->get_data( ).
16
* standard fields changed?
17
IF dynp_data_pbo-lv_test1 <> dynp_data_pai-lv_test1
18
OR dynp_data_pbo-lv_test2 <> dynp_data_pai-lv_test2
19
OR dynp_data_pbo-lv_test3 <> dynp_data_pai-lv_test3.
20
* update standard fields
21
lw_mepoheader-lv_test1 = dynp_data_pai-lv_test1.
22
lw_mepoheader-lv_test2 = dynp_data_pai-lv_test2.
23
lw_mepoheader-lv_test3 = dynp_data_pai-lv_test3.
24
25
CALL METHOD lw_header->set_data
26
EXPORTING
27
im_data = lw_mepoheader.
28
29
ENDIF.
30
ENDIF.
31
ENDMETHOD.
Step 13: If you want to check the value of these fields,
you can write it in
IF_EX_ME_PROCESS_PO_CUST~PROCESS_HEADER, where
I want to check field1 must be PALM.
[plain] view plaincopyprint?
1. METHOD if_ex_me_process_po_cust~process_header.
2.
3.
DATA: lw_mepoheader TYPE mepoheader,
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lw_customer TYPE ci_ekkodb.
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4.
5.
DATA: lv_testflag TYPE c.
6.
7.
INCLUDE mm_messages_mac. "useful macros for message handling
8.
9.
lw_mepoheader = im_header->get_data( ).
10.
11.
IF lw_mepoheader-lv_test1 <> 'PALM'.
12. * Place the cursor onto field lv_test1. The metafield was defined in BAdI ME_GUI_PO_CUST,
13. * Method MAP_DYNPRO_FIELDS.
14.
15.
mmpur_metafield mmmfd_cust_01.
16.
mmpur_message_forced 'E' 'ZDEV001' '999' '' '' '' ''.
17. *
MESSAGE 'This field should be filled ''PALM''' TYPE 'W'.
18.
19. *
CLEAR lv_testflag.
20. *
lv_testflag = 'X'.
21. *
EXPORT lv_testflag FROM lv_testflag TO MEMORY ID 'Z_ZERO_ME22N'.
22.
23. * invalidate the object
24.
25.
CALL METHOD im_header->invalidate( ).
ENDIF.
26.
27. ENDMETHOD.
1
2
3
METHOD if_ex_me_process_po_cust~process_header.
DATA: lw_mepoheader TYPE mepoheader,
lw_customer TYPE ci_ekkodb.
4
5
DATA: lv_testflag TYPE c.
6
7
INCLUDE mm_messages_mac. "useful macros for message handling
8
9
lw_mepoheader = im_header->get_data( ).
10
11
IF lw_mepoheader-lv_test1 <> 'PALM'.
12
* Place the cursor onto field lv_test1. The metafield was defined in BAdI ME_GUI_PO_CU
13
* Method MAP_DYNPRO_FIELDS.14
15
mmpur_metafield mmmfd_cust_01.
16
mmpur_message_forced 'E' 'ZDEV001' '999' '' '' '' ''.
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17
*
MESSAGE 'This field should be filled ''PALM''' TYPE 'W'.
19
*
CLEAR lv_testflag.
20
*
lv_testflag = 'X'.
21
*
EXPORT lv_testflag FROM lv_testflag TO MEMORY ID 'Z_ZERO_ME22N'.
18
22
23
24
25
* invalidate the object
CALL METHOD im_header->invalidate( ).
ENDIF.
26
27
ENDMETHOD.
If you press Enter to check, it will display an error message. After one
change, press Enter once to respond, but the second time there is no
response.
There is a flaw here. When we press save, this message will not be
displayed in the message table (I have studied it for a long time, but I
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haven't worked out how to do it). Fortunately, there is a very good function
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here. Select PO header data still faulty. message, press Edit, you can locate
the field of error message.
At this point, the enhancement is complete.
supplement:
1. IF_EX_ME_PROCESS_PO_CUST~INITIALIZE: initialize function groupThe
variable statement of ZCI_EKKODB can be written here.
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1. METHOD if_ex_me_process_po_cust~initialize.
2.
CALL FUNCTION 'ZCI_EKKODB_INIT'
3.
.
4. ENDMETHOD.
1
2
METHOD if_ex_me_process_po_cust~initialize.
CALL FUNCTION 'ZCI_EKKODB_INIT'
3
4
.
ENDMETHOD.
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2. IF_EX_ME_PROCESS_PO_CUST~OPEN: If you want to select the self-built
table, you can write it here. There is a field IM_TRTYP has a certain control
effect, and you can view its domain value.
3. IF_EX_ME_PROCESS_PO_CUST~POST: The statement to update the selfbuilt table can be written here.
4. Custom subscreen field must reference methodThe structure defined in
IF_EX_ME_GUI_PO_CUST~SUBSCRIBE, from dict should be checked.
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5. If there is a field in the self-built table, you must add a statement when
the method IF_EX_ME_GUI_PO_CUST~TRANSPORT_TO_MODEL determines
that the field of the self-built table changesCALL METHOD lw_header>set_changed( ), Otherwise, no data changed will be displayed when the
field of your self-built table changes. The following code is an example.
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~transport_to_model.
2.
3.
DATA: lw_header
TYPE REF TO if_purchase_order_mm,
4.
lw_mepoheader
TYPE mepoheader,
5.
lw_customer
TYPE ci_ekkodb,
6.
lw_po_header_handle
TYPE REF TO cl_po_header_handle_mm.
7. *--------------------------------------------------------------------*
8. * data have to be transported to business logic
9. *--------------------------------------------------------------------*
10.
IF im_name = subscreen1.
11.
12. * is it an item? im_model can be header or item.
13.
mmpur_dynamic_cast lw_header im_model.
14.
CHECK NOT lw_header IS INITIAL.
15.
lw_mepoheader = lw_header->get_data( ).
16. * standard fields changed?
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
17.
IF dynp_data_pbo-lv_test1 <> dynp_data_pai-lv_test1
18.
OR dynp_data_pbo-lv_test2 <> dynp_data_pai-lv_test2
19.
OR dynp_data_pbo-lv_test3 <> dynp_data_pai-lv_test3.
20. * update standard fields
21.
lw_mepoheader-lv_test1 = dynp_data_pai-lv_test1.
22.
lw_mepoheader-lv_test2 = dynp_data_pai-lv_test2.
23.
lw_mepoheader-lv_test3 = dynp_data_pai-lv_test3.
24.
25.
26.
CALL METHOD lw_header->set_data
EXPORTING
27.
im_data = lw_mepoheader.
28.
29.
ENDIF.
30.
31.
32.
33.
IF dynp_data_pbo-zdamon <> dynp_data_pai-zdamon.
CALL FUNCTION 'ZCI_EKKODB_SET_DATA'
EXPORTING
34.
im_damon = dynp_data_pai-zdamon.
35.
36.
37.
CALL METHOD lw_header->set_changed( ).
ENDIF.
38.
39.
ENDIF.
40. ENDMETHOD.
1
METHOD if_ex_me_gui_po_cust~transport_to_model.
2
3
DATA: lw_header
TYPE REF TO if_purchase_order_mm,
4
lw_mepoheader
TYPE mepoheader,
5
lw_customer
TYPE ci_ekkodb,
6
lw_po_header_handle
TYPE REF TO cl_po_header_handle_mm.
7
*--------------------------------------------------------------------*
8
* data have to be transported to business logic
9
*--------------------------------------------------------------------*
10
IF im_name = subscreen1.
11
12
* is it an item? im_model can be header or item.
13
mmpur_dynamic_cast lw_header im_model.
14
CHECK NOT lw_header IS INITIAL.
15
lw_mepoheader = lw_header->get_data( ).
16
* standard fields changed?
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
IF dynp_data_pbo-lv_test1 <> dynp_data_pai-lv_test1
18
OR dynp_data_pbo-lv_test2 <> dynp_data_pai-lv_test219
OR dynp_data_pbo-lv_test3 <> dynp_data_pai-lv_test3.20
21
lw_mepoheader-lv_test1 = dynp_data_pai-lv_test1.
22
lw_mepoheader-lv_test2 = dynp_data_pai-lv_test2.
23
lw_mepoheader-lv_test3 = dynp_data_pai-lv_test3.
* update standard fields
24
25
CALL METHOD lw_header->set_data
26
EXPORTING
27
im_data = lw_mepoheader.
28
29
ENDIF.
30
31
32
IF dynp_data_pbo-zdamon <> dynp_data_pai-zdamon.
CALL FUNCTION 'ZCI_EKKODB_SET_DATA'
33
EXPORTING
34
im_damon = dynp_data_pai-zdamon.
35
36
37
CALL METHOD lw_header->set_changed( ).
ENDIF.
38
39
ENDIF.
40
ENDMETHOD.
6.Method IF_EX_ME_GUI_PO_CUST~EXECUTE can handle function code.
[plain] view plaincopyprint?
1. METHOD if_ex_me_gui_po_cust~execute.
2.
3.
4.
IF im_fcode = 'ZZZZ'.
MESSAGE 'Zero test' TYPE 'I'.
ENDIF.
5. ENDMETHOD.
1
2
3
METHOD if_ex_me_gui_po_cust~execute.
IF im_fcode = 'ZZZZ'.
MESSAGE 'Zero test' TYPE 'I'.
4
ENDIF.
5
ENDMETHOD.
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
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ME21N/ME22N/ME23N screen enhancement BADI ME_GUI_PO_CUST - Programmer Sought
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