How to add a button in a list uibb

Question

Hello Volks,
I need help.
I have to add a Button ( or just events to a button ) to a list uibb dynamically at runtime, which means I can't use the ~get-definition method.
This means I have to do it in ~get-data. I can define my actions there and add them to ct_action_usage but I can't come up with a way
to assign them to the button.
Does anyone have any idea how that might work?
Thanks in advance.
Mike

Answer 1

Hi Micheal,
We can achieve the required functionality in get_data method. First,Create the button and assign it to concerned action ( initially defined in GET_DEFINITION method ) at UIBB configuration. Now in case if you want it hide it at start up ,& have to modify based on a event ,the  visible parameter of the CT_ACTION_USAGE can be used to achieve it.
VISIBLE = CL_WD_UIELEMENT=>E_VISIBLE-NONE. " To hide the UI concerned to method
VISIBLE = CL_WD_UIELEMENT=>E_VISIBLE-VISIBLE." TO show the UI concerned to the method.
In your case , following code will help accordingly. I have changed the visibility of button based on a event, initially I have disable the button and based on certain event I have enabled it again.
data ls_act_def like line of ET_ACTION_DEFINITION.
   ls_act_def-ENABLED = 'X'.
   ls_act_def-ID = 'ADD'.
   ls_act_def-TEXT = 'Add a row'.
   ls_act_def-VISIBLE = CL_WD_UIELEMENT=>E_VISIBLE-NONE.
   append LS_ACT_DEF to ET_ACTION_DEFINITION.
endmethod.
method IF_FPM_GUIBB_LIST~GET_DATA.
IF IV_EVENTID->MV_EVENT_ID EQ  'FETCH_DATA'.
  field-SYMBOLS: <fs_field> like line of CT_ACTION_USAGE.
    loop at CT_ACTION_USAGE ASSIGNING <FS_FIELD>.
      case <FS_FIELD>-ID.
      when 'ADD'. " name of the field
          <FS_FIELD>-VISIBLE = CL_WD_UIELEMENT=>E_VISIBLE-VISIBLE.
            EV_ACTION_USAGE_CHANGED = ABAP_TRUE.
      ENDCASE.
      ENDLOOP.
ENDIF.
endmethod.
Regards,
Harsha