ALV grid display (inc. column total)

*&-----------------------------------------------*
*& Report  ZDEMO_ALVGRID
*&
*&-----------------------------------------------*
*&
*& Example of a simple ALV Grid Report
*& ...................................
*&
*& Author: SAPDev.co.uk
*&
*& The basic requirement for this demo is to
*& display a number of fields from the EKPO
*& table
*&-----------------------------------------------*
REPORT  zdemo_alvgrid                 .

TABLES:     ekpo.

type-pools: slis.                                 "ALV Declarations
*Data Declaration
*----------------
TYPES: BEGIN OF t_ekpo,
  ebeln TYPE ekpo-ebeln,
  ebelp TYPE ekpo-ebelp,
  statu TYPE ekpo-statu,
  aedat TYPE ekpo-aedat,
  matnr TYPE ekpo-matnr,
  menge TYPE ekpo-menge,
  meins TYPE ekpo-meins,
  netpr TYPE ekpo-netpr,
  peinh TYPE ekpo-peinh,
 END OF t_ekpo.

DATA: it_ekpo TYPE STANDARD TABLE OF t_ekpo INITIAL SIZE 0,
      wa_ekpo TYPE t_ekpo.

*ALV data declarations
data: fieldcatalog type slis_t_fieldcat_alv with header line,
      gd_tab_group type slis_t_sp_group_alv,
      gd_layout    type slis_layout_alv,
      gd_repid     like sy-repid.


************************************************************************
*Start-of-selection.
START-OF-SELECTION.

perform data_retrieval.
perform build_fieldcatalog.
perform build_layout.
perform display_alv_report.


*&---------------------------------------------------------------------*
*&      Form  BUILD_FIELDCATALOG
*&---------------------------------------------------------------------*
*       Build Fieldcatalog for ALV Report
*----------------------------------------------------------------------*
form build_fieldcatalog.

* There are a number of ways to create a fieldcat.
* For the purpose of this example i will build the fieldcatalog manualy
* by populating the internal table fields individually and then
* appending the rows. This method can be the most time consuming but can
* also allow you  more control of the final product.

* Beware though, you need to ensure that all fields required are
* populated. When using some of functionality available via ALV, such as
* total. You may need to provide more information than if you were
* simply displaying the result
*               I.e. Field type may be required in-order for
*                    the 'TOTAL' function to work.

  fieldcatalog-fieldname   = 'EBELN'.
  fieldcatalog-seltext_m   = 'Purchase Order'.
  fieldcatalog-col_pos     = 0.
  fieldcatalog-outputlen   = 10.
  fieldcatalog-emphasize   = 'X'.
  fieldcatalog-key         = 'X'.
*  fieldcatalog-do_sum      = 'X'.
*  fieldcatalog-no_zero     = 'X'.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'EBELP'.
  fieldcatalog-seltext_m   = 'PO Item'.
  fieldcatalog-col_pos     = 1.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'STATU'.
  fieldcatalog-seltext_m   = 'Status'.
  fieldcatalog-col_pos     = 2.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'AEDAT'.
  fieldcatalog-seltext_m   = 'Item change date'.
  fieldcatalog-col_pos     = 3.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'MATNR'.
  fieldcatalog-seltext_m   = 'Material Number'.
  fieldcatalog-col_pos     = 4.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'MENGE'.
  fieldcatalog-seltext_m   = 'PO quantity'.
  fieldcatalog-col_pos     = 5.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'MEINS'.
  fieldcatalog-seltext_m   = 'Order Unit'.
  fieldcatalog-col_pos     = 6.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'NETPR'.
  fieldcatalog-seltext_m   = 'Net Price'.
  fieldcatalog-col_pos     = 7.
  fieldcatalog-outputlen   = 15.
  fieldcatalog-do_sum      = 'X'.        "Display column total
  fieldcatalog-datatype     = 'CURR'.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.

  fieldcatalog-fieldname   = 'PEINH'.
  fieldcatalog-seltext_m   = 'Price Unit'.
  fieldcatalog-col_pos     = 8.
  append fieldcatalog to fieldcatalog.
  clear  fieldcatalog.
endform.                    " BUILD_FIELDCATALOG


*&---------------------------------------------------------------------*
*&      Form  BUILD_LAYOUT
*&---------------------------------------------------------------------*
*       Build layout for ALV grid report
*----------------------------------------------------------------------*
form build_layout.
  gd_layout-no_input          = 'X'.
  gd_layout-colwidth_optimize = 'X'.
  gd_layout-totals_text       = 'Totals'(201).
*  gd_layout-totals_only        = 'X'.
*  gd_layout-f2code            = 'DISP'.  "Sets fcode for when double
*                                         "click(press f2)
*  gd_layout-zebra             = 'X'.
*  gd_layout-group_change_edit = 'X'.
*  gd_layout-header_text       = 'helllllo'.
endform.                    " BUILD_LAYOUT


*&---------------------------------------------------------------------*
*&      Form  DISPLAY_ALV_REPORT
*&---------------------------------------------------------------------*
*       Display report using ALV grid
*----------------------------------------------------------------------*
form display_alv_report.
  gd_repid = sy-repid.
  call function 'REUSE_ALV_GRID_DISPLAY'
       exporting
            i_callback_program      = gd_repid
*            i_callback_top_of_page   = 'TOP-OF-PAGE'  "see FORM
*            i_callback_user_command = 'USER_COMMAND'
*            i_grid_title           = outtext
            is_layout               = gd_layout
            it_fieldcat             = fieldcatalog[]
*            it_special_groups       = gd_tabgroup
*            IT_EVENTS                = GT_XEVENTS
            i_save                  = 'X'
*            is_variant              = z_template

       tables
            t_outtab                = it_ekpo
       exceptions
            program_error           = 1
            others                  = 2.
  if sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  endif.
endform.                    " DISPLAY_ALV_REPORT


*&---------------------------------------------------------------------*
*&      Form  DATA_RETRIEVAL
*&---------------------------------------------------------------------*
*       Retrieve data form EKPO table and populate itab it_ekpo
*----------------------------------------------------------------------*
form data_retrieval.

select ebeln ebelp statu aedat matnr menge meins netpr peinh
 up to 10 rows
  from ekpo
  into table it_ekpo.
endform.                    " DATA_RETRIEVAL