Problem with ALV grid Top of Page

By Joyjit Ghosh,
Kolkata, India.

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.

*---------------------------------------------------------------------*
* 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.