Add Event functionality to ALVgrid report

In order to add event functionality such as 'END_OF_PAGE' to the ALV grid you need to setup the IT_EVENTS option of the ALV function module. Also depending on which event you are using you may also need to setup the print parameters by activating the IS_PRINT option. Please note for events such as end_of_page, end_of_list etc they will not be displayed on screen but only in the printed output.

Step 1. Add data declaration for events and print parameters
Step 2. Update 'REUSE_ALV_GRID_DISPLAY' FM call to include parameter 'it_events' and 'is_print'
Step 3. Add code to setup events table and print parameters
Step 4. Create event FORM(s), which are executed when event is triggered


 DATA: gt_events     type slis_t_event,
       gd_prntparams type slis_print_alv.


 perform build_events.
 perform build_print_params.

 call function 'REUSE_ALV_GRID_DISPLAY'
       exporting
            i_callback_program      = gd_repid
            i_callback_top_of_page   = 'TOP-OF-PAGE'
            is_layout               = gd_layout
            it_fieldcat             = fieldcatalog[]
            it_events               = gt_events  
            is_print                = gd_prntparams  
            i_save                  = 'X'
       tables
            t_outtab                = it_ekko
       exceptions
            program_error           = 1
            others                  = 2.

*&------------------------------------------------------------------*
*&      Form  BUILD_EVENTS
*&------------------------------------------------------------------*
*       Build events table
*-------------------------------------------------------------------*
form build_events.
  data: ls_event type slis_alv_event.
  call function 'REUSE_ALV_EVENTS_GET'
       exporting
            i_list_type = 0
       importing
            et_events   = gt_events[].
  read table gt_events with key name =  slis_ev_end_of_page
                           into ls_event.
  if sy-subrc = 0.
    move 'END_OF_PAGE' to ls_event-form.
    append ls_event to gt_events.
  endif.
    read table gt_events with key name =  slis_ev_end_of_list
                           into ls_event.
  if sy-subrc = 0.
    move 'END_OF_LIST' to ls_event-form.
    append ls_event to gt_events.
  endif.
endform.                    " BUILD_EVENTS
*&------------------------------------------------------------------*
*&      Form  BUILD_PRINT_PARAMS
*&------------------------------------------------------------------*
*       Setup print parameters
*-------------------------------------------------------------------*
form build_print_params.
  gd_prntparams-reserve_lines = '3'.   "Lines reserved for footer
  gd_prntparams-no_coverpage = 'X'.
endform.                    " BUILD_PRINT_PARAMS

*&------------------------------------------------------------------*
*&      Form  END_OF_PAGE
*&------------------------------------------------------------------*
form END_OF_PAGE.
  data: listwidth type i,
        ld_pagepos(10) type c,
        ld_page(10)    type c.
  write: sy-uline(50).
  skip.
  write:/40 'Page:', sy-pagno .
endform.
*&------------------------------------------------------------------*
*&      Form  END_OF_LIST
*&------------------------------------------------------------------*
form END_OF_LIST.
  data: listwidth type i,
        ld_pagepos(10) type c,
        ld_page(10)    type c.
  skip.
  write:/40 'Page:', sy-pagno .
endform.

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