web ui为某个字段创建 value help

1: 为该字段创建get_v方法，给需要添加value的attribute添加get_v方法

2: 创建 function module

 function module 内容：

3： 创建value help： T-CODE, se11

 

 4: get_v方法

method GET_V_ADDR.
   DATA:
    ls_map_service_team_name TYPE if_bsp_wd_valuehelp_f4descr=>gtype_param_mapping,
    ls_map_service_team_type TYPE if_bsp_wd_valuehelp_f4descr=>gtype_param_mapping,
    lt_inmap                 TYPE if_bsp_wd_valuehelp_f4descr=>gtype_param_mapping_tab,
    lt_outmap                TYPE if_bsp_wd_valuehelp_f4descr=>gtype_param_mapping_tab,

    lo_property_access       TYPE REF TO if_bol_bo_property_access,
    lo_entity                TYPE REF TO cl_crm_bol_entity,
    lo_root                  TYPE REF TO cl_crm_bol_entity,
    lo_btadminh              TYPE REF TO cl_crm_bol_entity,
    lo_coll                  TYPE REF TO if_bol_entity_col,
    dref                     TYPE REF TO data.

  FIELD-SYMBOLS <fv_process_type> TYPE crmt_process_type.

  CHECK iv_mode = if_bsp_wd_model_setter_getter=>runtime_mode.

  lo_entity ?= me->collection_wrapper->if_bol_bo_col~get_first( ).
  IF lo_entity IS BOUND.
    lo_root = lo_entity->get_root( ).
  ENDIF.

  IF lo_root IS BOUND.
*    lo_coll = lo_root->get_related_entities( iv_relation_name = 'BTOrderHeader' ).
*    lo_btadminh = lo_coll->get_first( ).
*
*    dref = lo_btadminh->get_property( 'PROCESS_TYPE' ).     "#EC NOTEXT
  ENDIF.
*
*  ASSIGN dref->* TO <fv_process_type>.
*
  ls_map_service_team_name-context_attr = 'test1'.
  ls_map_service_team_name-f4_attr      = 'PARAM1'.
  APPEND ls_map_service_team_name TO: lt_inmap.

  ls_map_service_team_name-context_attr = 'STRUCT.ADDR'. "Output position
  ls_map_service_team_name-f4_attr      = 'PARAM1'.       "parameter
  APPEND ls_map_service_team_name TO: lt_outmap.

  CREATE OBJECT rv_valuehelp_descriptor TYPE cl_bsp_wd_valuehelp_f4descr
    EXPORTING
      iv_help_id        = 'ZTEST_VALUE_HELP'
      iv_help_id_kind   = if_bsp_wd_valuehelp_f4descr=>help_id_kind_name
      iv_input_mapping  = lt_inmap
      iv_output_mapping = lt_outmap
      iv_trigger_submit = abap_true.
endmethod.