ALV在标准按钮上增加自定义按钮，并实现文本及功能互相切换

1. 创建实现按钮添加和按钮响应的类方法：

   *&---------------------------------------------------------------------*
   *&  包含                ZSDF011_CLASS
   *&---------------------------------------------------------------------*
   CLASS lcl_handle_cell_events DEFINITION DEFERRED.
   *---------------------------------------------------------------------*
   *       CLASS lcl_handle_events DEFINITION
   *---------------------------------------------------------------------*
   * define a local class for handling events of cl_salv_table
   *---------------------------------------------------------------------*
   CLASS lcl_handle_cell_events DEFINITION.
     PUBLIC SECTION.
       METHODS:
         on_double_cell_click FOR EVENT double_click OF cl_gui_alv_grid
           IMPORTING e_row e_column es_row_no.
       METHODS:mt_toolbar_add FOR EVENT toolbar OF cl_gui_alv_grid
           IMPORTING e_object.
       METHODS:mt_func_event FOR EVENT user_command OF cl_gui_alv_grid
           IMPORTING e_ucomm.
   ENDCLASS.
   *---------------------------------------------------------------------*
   *       CLASS lcl_handle_events IMPLEMENTATION
   *---------------------------------------------------------------------*
   * implement the events for handling the events of cl_salv_table
   *---------------------------------------------------------------------*
   CLASS lcl_handle_cell_events IMPLEMENTATION.
     METHOD on_double_cell_click.
       DATA ls_yck TYPE zsds087.
       CLEAR:gv_kunag,gv_kunrg,ls_yck,gv_mark.
       READ TABLE gt_alv_yck INTO ls_yck INDEX es_row_no-row_id. "判断行号
       gv_kunag = ls_yck-kunag.
       gv_kunrg = ls_yck-kunrg.
       PERFORM frm_get_czjldata USING gv_kunag gv_kunrg.
       PERFORM frm_get_djqddata USING gv_kunag gv_kunrg.
       PERFORM frm_diaplay_alv_refresh.
     ENDMETHOD.
     METHOD mt_toolbar_add.
       DATA ls_button TYPE stb_button.
       IF gv_mark = 'X'.
         CLEAR ls_button.
         ls_button-butn_type = '3'.
         APPEND ls_button TO e_object->mt_toolbar.
         CLEAR ls_button.
         ls_button-function = 'CHANGE'.
         ls_button-icon     = '@BB@'.
         ls_button-text     = '切换到客户记录'.
         APPEND ls_button TO e_object->mt_toolbar.
       ELSE.
         CLEAR ls_button.
         ls_button-butn_type = '3'.
         APPEND ls_button TO e_object->mt_toolbar.
         CLEAR ls_button.
         ls_button-function = 'ECHANGE'.
         ls_button-icon     = '@BB@'.
         ls_button-text     = '切换到全部记录'.
         APPEND ls_button TO e_object->mt_toolbar.
       ENDIF.
     ENDMETHOD.
     METHOD mt_func_event.
       DATA:lv_kunag TYPE kna1-kunnr,
            lv_kunrg TYPE kna1-kunnr.
       CASE e_ucomm.
         WHEN 'CHANGE'.
           CLEAR:lv_kunag,lv_kunrg,gt_alv_czjl[],gt_alv_djqd,gv_mark.
           lv_kunag = gv_kunag.
           lv_kunrg = gv_kunrg.
           PERFORM frm_get_czjldata USING lv_kunag lv_kunrg.
           PERFORM frm_get_djqddata USING lv_kunag lv_kunrg.
           PERFORM frm_diaplay_alv_refresh.
         WHEN 'ECHANGE'.
           CLEAR:lv_kunag,lv_kunrg,gt_alv_czjl[],gt_alv_djqd[],gv_mark.
           gv_mark = 'X'.
           lv_kunag = gv_kunag.
           PERFORM frm_get_czjldata USING lv_kunag lv_kunrg.
           PERFORM frm_get_djqddata USING lv_kunag lv_kunrg.
           PERFORM frm_diaplay_alv_refresh.
         WHEN OTHERS.
       ENDCASE.
     ENDMETHOD.
   ENDCLASS.
   
   DATA gr_events TYPE REF TO lcl_handle_cell_events."定义事件

2. 定义类和方法使用的全局变量：

   DATA: gt_container TYPE REF TO cl_gui_custom_container,
         gt_container1 TYPE REF TO cl_gui_container,
         gt_container2 TYPE REF TO cl_gui_container,
         gt_container3 TYPE REF TO cl_gui_container.
   DATA: gt_alv_grid1 TYPE REF TO cl_gui_alv_grid,
         gt_alv_grid2 TYPE REF TO cl_gui_alv_grid,
         gt_alv_grid3 TYPE REF TO cl_gui_alv_grid.
   
   DATA:gv_kunag      TYPE kna1-kunnr,     "售达方
        gv_kunrg      TYPE kna1-kunnr,     "付款方
        gv_mark(1)    TYPE c.

3. 将定义的类方法分配给类使用：

     CLEAR gwa_layout_lvc-grid_title.
     gwa_layout_lvc-grid_title = '文本描述' .
   
     CREATE OBJECT gr_events.
     SET HANDLER gr_events->mt_toolbar_add  FOR gt_alv_grid2.
     SET HANDLER gr_events->mt_func_event  FOR gt_alv_grid2.
   
     CALL METHOD gt_alv_grid2->set_table_for_first_display
       EXPORTING
         is_layout            = gwa_layout_lvc
         it_toolbar_excluding = gt_exclude
         i_save               = 'A'
       CHANGING
         it_outtab            = gt_alv_czjl
         it_fieldcatalog      = gt_fieldcat_czjllvc.

4. 这样自定义按钮及其功能就实现了