How to switch two fields with one of them OBLIGATORY

Question

Hi everyone,
i have two radio button on the screen: RD_A  and RD_B, while there are two fields corresponding to them: P_A and P_B, P_A is OBLIGATORY.
i want to implment: when i click RD_A, field P_A is enable and field p_B is disable. when i click RD_B, field P_B is enable and field P_A is disable.
i tried using LOOP AT SCREEN ...screen-input = '0' and screen-required = '0' ....MODIFY SCREEN...statements, but it cannot work fine. when i switch from A to B, it always popup error message 'Fill in all required entry fields'.
can anyone help me? thanks in advance!

Answer 1

you can try this approach, instead of using Obligatory Addition.
REPORT  ztest_radio.
TABLES: sflight.
SELECT-OPTIONS: carrid FOR sflight-carrid,
                connid FOR sflight-connid.
PARAMETERS: r1 RADIOBUTTON GROUP g1 USER-COMMAND abc DEFAULT 'X',
            r2 RADIOBUTTON GROUP g1.
AT SELECTION-SCREEN OUTPUT.
  IF r1 = 'X'.
    LOOP AT SCREEN.
      IF screen-name CS 'CONNID'.
        screen-input = 0.
        MODIFY SCREEN.
      ENDIF.
    ENDLOOP.
  ELSE.
    LOOP AT SCREEN.
      IF screen-name CS 'CARRID'.
        screen-input = 0.
        MODIFY SCREEN.
      ENDIF.
    ENDLOOP.
  ENDIF.
AT SELECTION-SCREEN.
  IF sy-ucomm = 'ONLI'.   "This triggers only when you press execute button
    IF r1 = 'X'.
      IF carrid IS INITIAL.
        MESSAGE 'Enter Carrid' TYPE 'E'.
      ENDIF.
    ELSE.
      IF connid IS INITIAL.
        MESSAGE 'Enter Connid' TYPE 'E'.
      ENDIF.
    ENDIF.
  ENDIF.