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Top-of-Page - How to print more than 60 characters?



 
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PostPosted: Mon Mar 10, 2008 12:00 pm    Post subject: Top-of-Page - How to print more than 60 characters? Reply with quote

Problem with ALV Grid Top-of-Page - How to print more than 60 characters?
Author: Joyjit Ghosh, IBM India
Origital: http: //www.saptechnical.com/Tutorials/ALV/TopofPage/Solution.htm

Problem:
Normally in ALV grid TOP_OF_PAGE, we cannot display information of more than 60 characters long. This is due to the limitation of the FM REUSE_ALV_COMMENTARY_WRITE. Usually we call this FM from the subroutine that is linked with TOP_OF_PAGE event.
CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
EXPORTING
it_list_commentary =
i_logo =
i_end_of_list_grid =
.
*"---------------------------------------------------------------
*"*"Lokale Schnittstelle:
*" IMPORTING
*" VALUE(IT_LIST_COMMENTARY) TYPE SLIS_T_LISTHEADER
*" REFERENCE(I_LOGO) OPTIONAL
*" REFERENCE(I_END_OF_LIST_GRID) OPTIONAL
*"--------------------------------------------------------------

In this above FM, exporting parameter ‘IT_LIST_COMMENTARY’ contains a field ‘INFO’ that is only 60 characters long. And it is responsible for displaying the information in the TOP_OF_PAGE area.

Solution:
To overcome this limitation we can use dynamic document, which can be implemented through the class CL_DD_DOCUMENT. As dynamic documents use HTML viewer control so instead of triggering the TOP_OF_PAGE event we should trigger event of HTML TOP_OF_PAGE.

First create a subroutine for top of page in HTML format and send that name in I_CALLBACK_HTML_TOP_OF_PAGE parameter of ALV function module. The input parameter for this subroutine will be a variable of class CL_DD_DOCUMENT.
Code:
*-----------------------------------------------------------------*
*       FORM html_top_of_page                                     *
*-----------------------------------------------------------------*
FORM html_top_of_page USING top TYPE REF TO cl_dd_document.
  data: l_text(255) type c.
 do 180 times.
  l_text+sy-index(1) = '*'.
 enddo.
  CALL METHOD top->add_text EXPORTING text = 'Hello world '
                                      sap_style = 'heading' .
  CALL METHOD top->add_gap EXPORTING width = 200.
  CALL METHOD top->add_picture EXPORTING picture_id = 'ENJOYSAP_LOGO'.
  CALL METHOD top->NEW_LINE( ).
  CALL METHOD top->add_text EXPORTING
  text = l_text.
ENDFORM.
* Display ALV grid
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
     EXPORTING
          i_callback_html_top_of_page = 'HTML_TOP_OF_PAGE'
          i_callback_program          = g_repid
          i_structure_name            = 'SFLIGHT'
     TABLES
          t_outtab                    = gt_outtab.


Output:


Limitations:
As dynamic documents use SAP HTML Viewer control internally, so whatever limitations exist for SAP HTML Viewer, same limitations hold true for dynamic documents also.
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