SAP ALV合并单元格示例（合并单元格为表头）

前言

• 实现参考Enno Wulff的文章（德文）：Zellen verbinden
• 在原有基础上新增了部分功能(支持输入合并单元格的显示值)

效果

代码

• 主程序

  *&---------------------------------------------------------------------*
  * TABLES 申明表类型工作区/Work area for declaring table object types
  *&---------------------------------------------------------------------*
  
  
  *&---------------------------------------------------------------------*
  * TYPE-POOL 引入类型池/Introduce type pool
  *&---------------------------------------------------------------------*
  
  
  *&---------------------------------------------------------------------*
  * TYPES 定义数据类型/defines a standalone data type
  *&---------------------------------------------------------------------*
  TYPES: BEGIN OF t_check_styles,
           matnr TYPE mara-matnr,
           ersda  TYPE mara-ersda,
           ernam  TYPE mara-ernam,
           laeda  TYPE mara-laeda,
           aenam  TYPE mara-aenam,
           vpsta  TYPE mara-vpsta,
           pstat  TYPE mara-pstat,
           lvorm  TYPE mara-lvorm,
           mtart  TYPE mara-mtart,
           mbrsh  TYPE mara-mbrsh,
           matkl  TYPE mara-matkl,
           bismt  TYPE mara-bismt,
  END OF t_check_styles.
  
  *&---------------------------------------------------------------------*
  * CONSTANTS 申明常量/declares a constant data object
  *&---------------------------------------------------------------------*
  
  
  *&---------------------------------------------------------------------*
  * DATA 申明全局变量/declares a variable of any data type
  * Declaration type：var, ref, struc, comp, itab, and range_tab
  *&---------------------------------------------------------------------*
  
  INCLUDE <cl_alv_control>.
  INCLUDE <icon>.
  
  DATA ok_code TYPE sy-ucomm.
  DATA gt_main TYPE TABLE OF t_check_styles.
  
  FIELD-SYMBOLS <fs_styles>        TYPE t_check_styles.
  DATA : lt_fieldcatalog  TYPE lvc_t_fcat.
  
  FIELD-SYMBOLS  <fs_cat> TYPE lvc_s_fcat.
  
  CLASS zcl_gui_alv_grid DEFINITION DEFERRED .
  DATA it_col_merge        TYPE lvc_t_co01.
  DATA wa_col_merge        TYPE lvc_s_co01.
  DATA: g_custom_container TYPE REF TO cl_gui_custom_container.
  DATA  g_alv_grid         TYPE REF TO zcl_gui_alv_grid.
  CLASS cl_gui_cfw DEFINITION LOAD.
  
  DATA: x_save,                     "for Parameter I_SAVE
        gs_variant TYPE disvariant. "for parameter IS_VARIANT
  DATA gs_layout TYPE lvc_s_layo.   " Layout
  DATA wa_style  TYPE lvc_s_styl.
  
  *&---------------------------------------------------------------------*
  * DEFINE 定义全局宏/Define global macro
  *&---------------------------------------------------------------------*
  
  
  *&---------------------------------------------------------------------*
  * CLASS DEFINITION 定义类/Definition class
  *&---------------------------------------------------------------------*
  CLASS zcl_gui_alv_grid DEFINITION INHERITING FROM cl_gui_alv_grid.
  
    "Implement CL GUI ALV GRID method
    PUBLIC SECTION.
      "Horizontal merge method
      METHODS z_set_merge_horiz
        IMPORTING
          row           TYPE i
          value         TYPE lvc_value
        CHANGING
          tab_col_merge TYPE lvc_t_co01.
      "Vertical merge method
      METHODS z_set_merge_vert
        IMPORTING
          row           TYPE i
          value         TYPE lvc_value
        CHANGING
          tab_col_merge TYPE lvc_t_co01.
  
      METHODS z_set_header_value
        IMPORTING
          row TYPE i
          col TYPE i
          value TYPE lvc_value.
  
      "Change output to CL_GUI_ALV_GRID display method
      METHODS z_display.
      "Sets the cell style method
      METHODS z_set_cell_style
        IMPORTING
          row    TYPE i OPTIONAL
          col    TYPE i OPTIONAL
          style  TYPE lvc_style
          style2 TYPE lvc_style OPTIONAL.
      "Set fixed columns/rows method
      METHODS z_set_fixed_col_row
        IMPORTING
          col TYPE i
          row TYPE i.
      "Initialize cell style method
      METHODS z_init_cell_styles.
  ENDCLASS.                    "ZCL_GUI_ALV_GRID DEFINITION
  
  *&---------------------------------------------------------------------*
  * CLASS IMPLEMENTATION 实现类/Implementation class
  *&---------------------------------------------------------------------*
  CLASS zcl_gui_alv_grid IMPLEMENTATION.
    METHOD z_set_merge_horiz.
  * ROW - row whose columns are to be merged
  * tab_col_merge - Columns to be merged
      FIELD-SYMBOLS  TYPE lvc_s_co01.
      FIELD-SYMBOLS  TYPE lvc_s_data.
      DATA outputlen TYPE i.
  
      SORT tab_col_merge.
  * Columns to merge
      LOOP AT tab_col_merge ASSIGNING .
  * data verification
        IF -col_id    LE 0.                CONTINUE. ENDIF.
        IF -outputlen LE -col_id. CONTINUE. ENDIF.
        outputlen = -outputlen - -col_id.
        LOOP AT mt_data ASSIGNING 
        WHERE row_pos = row  AND
        ( col_pos BETWEEN -col_id AND
        -outputlen ).
  * Set how far to merge From column in length
  * starting with the 1st column
          IF -col_pos = -col_id.
            -mergehoriz = outputlen.
  * with all others who belong together
  * the value has to go out because it comes from the 1st column
  * and the merge indicator must also go!
            -value = value.
          ELSE.
            CLEAR -mergehoriz.
            CLEAR -value.
          ENDIF.
        ENDLOOP.
      ENDLOOP.
    ENDMETHOD.                    "Z_SET_MERGE_HORIZ
  
    METHOD z_set_merge_vert.
  * ROW - row whose columns are to be merged
  * tab_col_merge - Columns to be merged
      FIELD-SYMBOLS <fs_cols> TYPE lvc_s_co01.
      FIELD-SYMBOLS <fs_data> TYPE lvc_s_data.
      DATA outputlen TYPE i.
  
      SORT tab_col_merge.
  * Columns to merge
      LOOP AT tab_col_merge ASSIGNING <fs_cols>.
  * data verification
        IF <fs_cols>-col_id    LE 0.                CONTINUE. ENDIF.
        IF <fs_cols>-outputlen LE <fs_cols>-col_id. CONTINUE. ENDIF.
        outputlen = <fs_cols>-outputlen - <fs_cols>-col_id.
        LOOP AT mt_data ASSIGNING