复制REUSE_ALV_GRID_DISPLAY_LVC，给函数添加简易的F4处理能力

翻遍REUSE_ALV_GRID_DISPLAY_LVC这个函数我们可以发现，这个函数里预定义了一些事件类型。

不过也缺少了一些类型，看看SLIS这个类型池就可以发现，ONF4事件是没有的。

为了把这个函数做出通用和简易的，复制这个函数所在的函数组SLVC_FULLSCREEN到ZSLVC_FULLSCREEN.

然后我们在这个新函数组里，定义F4事件：

LZSLVC_FULLSCREENTOP中定义grid的时候加上F4：

LZSLVC_FULLSCREENTOP中定义本地类lcl_event_receiver的时候加上F4方法：

METHODS handle_onf4
                  FOR EVENT onf4 OF cl_gui_alv_grid
      IMPORTING   e_fieldname
                  e_fieldvalue
                  es_row_no
                  er_event_data
                  et_bad_cells
                  e_display.

LZSLVC_FULLSCREENTOP中实现本地类lcl_event_receiver的时候加上F4处理：

FORM method_onf4 USING        pa_fieldname      TYPE  lvc_fname
                              pa_fieldvalue     TYPE  lvc_value
                              pa_row_no         TYPE  lvc_s_roid
                              pa_r_event_data   TYPE REF TO  cl_alv_event_data
                              pa_t_bad_cells    TYPE  lvc_t_modi
                              pa_display.
  IF NOT gt_grid-i_callback_onf4 IS INITIAL AND
     NOT i_callback_program IS INITIAL.
    PERFORM (gt_grid-i_callback_onf4)
      IN PROGRAM (i_callback_program) USING  pa_fieldname
           pa_fieldvalue
           pa_row_no
           pa_r_event_data
           pa_t_bad_cells
           pa_display.
  ENDIF.

ENDFORM.                               " METHOD_DATA_CHANGED

LZSLVC_FULLSCREENF02中定义grid对象注册事件里加上ONF4

LZSLVC_FULLSCREENF01中分配回调对象：

因为SLIS里没有ONF4的对象，所以event get 里只能写固定值：

基本逻辑就是：定义ONF4事件，类里实现ONF4事件，实现方法里执行回调函数对应的程序和FORM。

这样我们就可以调ALV函数的时候加上一句简单的ONF4事件和对应的处理form里可以了。

REPORT zly_f4.
TYPE-POOLS:slis.

*CLASS lcl_event_receiver DEFINITION DEFERRED.
DATA: gt_fcat   TYPE lvc_t_fcat,
      gs_fcat   TYPE lvc_s_fcat,
      gt_f4     TYPE lvc_t_f4,
      gs_f4     TYPE lvc_s_f4,
      gs_event  TYPE slis_alv_event,
      gt_event  TYPE slis_t_event,
      gs_layout TYPE lvc_s_layo,
      gs_glay   TYPE lvc_s_glay.

DATA: "event_receiver TYPE REF TO lcl_event_receiver,
      go_grid        TYPE REF TO cl_gui_alv_grid.

DATA: BEGIN OF gs_data ,
        pernr TYPE char10,
        nachn TYPE nachn,
        gesch TYPE gesch,
      END OF gs_data,
      gt_data LIKE TABLE OF gs_data.

DATA: BEGIN OF gs_f4value,
        gesch TYPE gesch,
        ztext TYPE text,
      END OF gs_f4value,
      gt_f4value LIKE TABLE OF gs_f4value.

START-OF-SELECTION.
  PERFORM f_get_data.
  PERFORM f_show_data.

FORM f_get_data .
  SELECT partner AS pernr name_last AS nachn FROM but000 INTO CORRESPONDING FIELDS OF TABLE gt_data UP TO 10 ROWS.
*    WHERE begda LE sy-datum AND endda GE sy-datum.

ENDFORM.

FORM f_show_data .
  DEFINE %%fcat.
    CLEAR GS_FCAT.
    GS_FCAT-FIELDNAME = &1.
    GS_FCAT-SCRTEXT_L = &2.
    IF &1 = 'GESCH'.
      GS_FCAT-EDIT = 'X'.
      GS_FCAT-F4AVAILABL = 'X'.
    ENDIF.
    APPEND GS_FCAT TO GT_FCAT.
  END-OF-DEFINITION.
  %%fcat: 'PERNR' '人员编号',
          'NACHN' '姓名',
          'GESCH' '性别'.

  gs_event-name = 'ONF4'.
  gs_event-form = 'F_F4_HELP'.
  APPEND gs_event TO gt_event.
  gs_glay-edt_cll_cb = 'X'.
  CALL FUNCTION 'ZREUSE_ALV_GRID_DISPLAY_LVC'
    EXPORTING
      i_callback_program       = sy-cprog
      i_callback_pf_status_set = 'PF_STATUS_SET'
      it_fieldcat_lvc          = gt_fcat
      it_events                = gt_event
      i_grid_settings          = gs_glay
    TABLES
      t_outtab                 = gt_data.
ENDFORM.

FORM f_f4_help USING e_fieldname TYPE lvc_fname
                      p_fieldvalue     TYPE  lvc_value
                       es_row_no         TYPE  lvc_s_roid
                       p_r_event_data   TYPE REF TO  cl_alv_event_data
                       p_t_bad_cells    TYPE  lvc_t_modi
                       p_display.
  DATA: lt_ddshretval TYPE STANDARD TABLE OF ddshretval,
        ls_ddshretval TYPE ddshretval.
  CLEAR gs_f4value.
  gs_f4value-gesch = 1.
  gs_f4value-ztext = '男'.
  APPEND gs_f4value TO gt_f4value.
  CLEAR gs_f4value.
  gs_f4value-gesch = 2.
  gs_f4value-ztext = '女'.
  APPEND gs_f4value TO gt_f4value.
  CLEAR gs_f4value.
  gs_f4value-gesch = 3.
  gs_f4value-ztext = '中'.
  APPEND gs_f4value TO gt_f4value.

  CHECK e_fieldname = 'GESCH'.
  REFRESH lt_ddshretval.

  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
    EXPORTING
      retfield         = 'GESCH'    "
      dynpprog         = sy-repid
      dynpnr           = sy-dynnr
      dynprofield      = 'GESCH'
      value_org        = 'S'
      callback_program = sy-repid
      callback_form    = 'FM_CB_FORM'
    TABLES
      value_tab        = gt_f4value
      return_tab       = lt_ddshretval
    EXCEPTIONS
      parameter_error  = 1
      no_values_found  = 2
      OTHERS           = 3.

  IF sy-subrc = 0 AND lt_ddshretval IS NOT INITIAL .
    CLEAR ls_ddshretval.
    READ TABLE lt_ddshretval INTO ls_ddshretval INDEX 1.
    IF ls_ddshretval-fieldval IS NOT INITIAL.
      CLEAR gs_data.
      READ TABLE gt_data INTO gs_data INDEX es_row_no-row_id.
      gs_data-gesch = ls_ddshretval-fieldval.
      MODIFY gt_data FROM gs_data INDEX es_row_no-row_id
                       TRANSPORTING gesch.
    ENDIF.
  ENDIF.
ENDFORM.

FORM refresh_table_alv .
  DATA: ls_stbl TYPE lvc_s_stbl.
  ls_stbl-row = 'X'."
  ls_stbl-col = 'X'.
  CALL METHOD go_grid->refresh_table_display
    EXPORTING
      is_stable = ls_stbl.
ENDFORM.

FORM pf_status_set USING rt_extab TYPE slis_t_extab.
  SET PF-STATUS 'STATUS_ALV'.

  gs_f4-fieldname = 'GESCH'.
  gs_f4-register = 'X'.
  gs_f4-getbefore = 'X'.
*  gs_f4-chngeafter = 'X'.
  INSERT gs_f4 INTO TABLE gt_f4.
  CALL FUNCTION 'ZGET_GLOBALS_FROM_SLVC_FULLSCR'
    IMPORTING
      e_grid = go_grid.
  CALL METHOD go_grid->register_edit_event
    EXPORTING
      i_event_id = cl_gui_alv_grid=>mc_evt_modified.

  CALL METHOD go_grid->register_f4_for_fields
    EXPORTING
      it_f4 = gt_f4[].
ENDFORM.
*&---------------------------------------------------------------------*
*&      FORM  FM_CB_FORM
*&---------------------------------------------------------------------*
FORM fm_cb_form TABLES record_tab STRUCTURE seahlpres
              CHANGING shlp TYPE shlp_descr_t
                       callcontrol LIKE ddshf4ctrl.
  DATA: interface LIKE LINE OF shlp-interface.
  READ TABLE shlp-interface INTO interface INDEX 1.
  interface-shlpfield+4(1) = '1'.
  interface-valfield = 'DOC_LAYOUT'.
  APPEND interface TO shlp-interface.
  DELETE shlp-interface INDEX 1.
ENDFORM.                    "BO_CALLBACK_FORM