How to access selection screen input attributes through screen painter?

[waleed_k99]

Hello everyone,

I am relatively new to ABAP programming, and I need some help with a certain requirement.

I currently have a task where I need to make select-options mandatory/optional based on which radio button is checked. Seeing as I cannot define select-options in screen painter, I decided to create a subscreen containing them, and inserting it into a subscreen area.

Unfortunately, I cannot figure out a way to change the 'required' attribute for the select-options programmatically. How can I achieve this requirement?

*-Group1 'REQ' contains the select-*options. If r_manage/r_display radio button is checked, the select-*options should be made optional
  LOOP AT SCREEN INTO wa_screen.
    CASE 'X'.
      WHEN r_entry.
        IF wa_screen-group1 EQ 'ENT'.
          wa_screen-active = '0'.
        ENDIF.
      WHEN r_manage.
        CASE wa_screen-group1.
          WHEN'ENT'.
            wa_screen-active = '1'.
          WHEN 'REQ'.
            vl_req_flag = 'X'.
        ENDCASE.
      WHEN r_display.
        CASE wa_screen-group1.
          WHEN'ENT'.
            wa_screen-active = '1'.
          WHEN 'REQ'.
            vl_req_flag = 'X'.
        ENDCASE.
    ENDCASE.
    MODIFY SCREEN FROM wa_screen.
  ENDLOOP.

*-Preparing values in listbox
  vl_vrm_id = 'P_STATUS'.

  wa_vrm-key = '1'.
  wa_vrm-text = 'Available'.
  APPEND wa_vrm TO it_vrm.

  wa_vrm-key = '2'.
  wa_vrm-text = 'Out'.
  APPEND wa_vrm TO it_vrm.

  wa_vrm-key = '3'.
  wa_vrm-text = 'Both'.
  APPEND wa_vrm TO it_vrm.

  CALL FUNCTION 'VRM_SET_VALUES'
    EXPORTING
      ID                    = vl_vrm_id
      VALUES                = it_vrm.
ENDFORM.

The above subroutine is called whenever the PBO module is called. I am using 'vl_req_flag' as a global variable to determine whether the select-options should be mandatory or optional. I am just stuck on how to access the attributes for the inputs to modify the 'required' attribute.

Any help would be greatly appreciated.

[xiswanto]

to change the parameter / select option as required, you need to pass the screen-required = 1
*assuming your optional word mean not mandatory

[Sandra_Rossi]

Why do you use subscreens? Are you mixing dynpro and selection screen?

If yes, make sure you do LOOP AT SCREEN, MODIFY SCREEN in the right event (at selection-screen output, or PBO module).

As it varies according to the checkbox, it should be "recommended" (required = 2) otherwise you'll get into many troubles (+ you will need to check the mandatory value by ABAP):

screen-required = '2'.

• 0: optional
• 1: obligatory
• 2: recommended

[waleed_k99]

Yes I had to mix dynpro and selection-screen due to dynpro not supporting multiple entry input fields. I managed to get it working with your advice though, thank you.