Hi,
Create a Server Event for the field.
Implement get_p method and give the event handler name to fp_server_event.
Server event will refresh everything and hence your event handler will get a hit.
METHOD GET_P_CAT_NAME.
CASE iv_property.
WHEN if_bsp_wd_model_setter_getter=>fp_fieldtype.
rv_value = cl_bsp_dlc_view_descriptor=>field_type_input.
WHEN IF_BSP_WD_MODEL_SETTER_GETTER=>fp_server_event.
rv_value = 'ENTER'.
ENDCASE.
ENDMETHOD.
This may solve your problem.
Regards,
Raghavendra Hegde