Scrolling Window by Window (SAP Library - ABAP Programming (BC-ABA))

Scrolling Window by Window

To scroll through a list vertically by the size of the current window and independent of the page length, use the following statement:

Syntax

SCROLL LIST FORWARD|BACKWARD [INDEX <idx>].

If you do not use the INDEX addition, the statement scrolls forward or backward by one whole window in the current list. If you use the INDEX <idx> addition, the system scrolls in the list with the level <idx>. For more information on scrolling in list levels, see Scrolling through Interactive Lists.

Example

REPORT demo_list_scroll_1 NO STANDARD PAGE HEADING LINE-SIZE 40.
TOP-OF-PAGE.
  WRITE: 'Top of Page', sy-pagno, 'SY-SROWS:', sy-srows.
  ULINE.
START-OF-SELECTION.
  DO 100 TIMES.
    WRITE / sy-index.
  ENDDO.
  DO 3 TIMES.
    SCROLL LIST FORWARD.
  ENDDO.

This executable program (report) creates a list of one endless page. Within the DO loop, the system executes the SCROLL statement three times. If the current window has a length of 12 lines (stored in SY-SROWS), the output of the program appears as below:

This graphic is explained in the accompanying text

Note that the actual list is scrolled by SY-SROWS minus the number of header lines. The user can continue scrolling into both directions.