SCROLL ( SAP ABAP keyword)

SCROLL is a keyword used in SAP ABAP programming.This tutorial covers its introduction & syntax details.

SCROLL

Program-driven scrolling in lists

Variants


1. SCROLL LIST TO FIRST PAGE.
2. SCROLL LIST TO LAST PAGE.
3. SCROLL LIST TO PAGE pag.
4. SCROLL LIST TO COLUMN col.
5. SCROLL LIST FORWARD.
6. SCROLL LIST BACKWARD.
7. SCROLL LIST LEFT.
8. SCROLL LIST RIGHT.

Note

The return code value is set as follows:

SY-SUBRC = 0 O.K.
SY_SUBRC = 4 List limits have been reached - scrolling not possible
SY-SUBRC = 8 List does not exist - scrolling not possible

Variant 1
SCROLL LIST TO FIRST PAGE.

Additions



1. ... INDEX idx
2. ... LINE lin
Effect
Scrolls up to the first page of the report displayed on the screen (corresponds to a command field entry, P-- and PP-- ). When a basic list is created, the current list is itself the basic list; When a details list is created, it is the list directly below it.

Addition 1
... INDEX idx.

Effect
Scrolls to the list level idx . idx corresponds to the value of system field SY-LSIND when creating the report.

Example
Scroll to the beginning of the report at list level 1.


SCROLL LIST INDEX 1 TO FIRST PAGE.



Note
If a new list (which is to replace the last list displayed) is created at an event ( AT USER-COMMAND , AT LINE-SELECTION... ), and if you want to scroll to a particular place in this new list, note the following: A change made to the system field SY-LSIND is only ever taken into account after the event. Therefore, SY-LSIND should be manipulated using the last command belonging to the event (e.g. SY-LSIND = SY-LSIND - 1 ). A SCROLL command with the addition ...INDEX idx must therefore be used for scrolling in this new list. In this way, scrolling in the old list (instead of the new list) is avoided.

Addition 2
... LINE lin

Effect
Displays the report from the line lin (corresponds to the command field entry PLnn). The standard page header and TOP-OF-PAGE area are not moved vertically and are therefore ignored when line lin is determined.

Variant 2
SCROLL LIST TO LAST PAGE.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... LINE lin (see addition 2 of variant 1)

Effect
Scrolls to the last page of the report displayed on the screen (corresponds to the command field entries P++ and PP++ ).

Variant 3
SCROLL LIST TO PAGE pag.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... LINE lin (see addition 2 of variant 1)

Effect
Scrolls to the specified page of the report displayed on the screen (corresponds to the command field entry PPnn ).

Examples
Scroll report on list level 1 to page 7.


SCROLL LIST INDEX 1 TO PAGE 7.


Scroll report on list level 1 to page 7 and display from line 5.


SCROLL LIST INDEX 1 TO PAGE 7 LINE 5.



Note
Although the list is now displayed from page 7 and line 5, it is precisely this line which is overlayed by the page header, if a header exists for page 7 (standard header and/or TOP-OF-PAGE lines).
If you want to display a particular line immediately after the page header, you can use the function module 'LIST_SCROLL_LINE_TOPMOST' which makes the necessary calculations (according to DESCRIBE LIST ... ).

Variant 4
SCROLL LIST TO COLUMN col.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... LINE lin (see addition 2 of variant 1)

Effect
Displays the current page from column col (corresponds to the command field entry PSnn ). The current page is the last page to be seen on the screen or the page that was scrolled with a preceding SCROLL LIST TO...PAGE... statement.

Example
Scroll to page 5 of current report and display this page from column 20.


SCROLL LIST TO PAGE 5.


SCROLL LIST TO COLUMN 20.



Variant 5
SCROLL LIST FORWARD.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... n PAGES

Effect
Scrolls down 1 screen page (but no further than the last page; corresponds to the command field entry P+).

Example
Scroll report last displayed one page down.

SCROLL LIST FORWARD.

Addition 2
... n PAGES

Effect
Scrolls n pages (corresponds to the command field entry PP+ n ).

Note
When you use the addition ... n PAGES , scrolling is by page, not by screen section.

Variant 6
SCROLL LIST BACKWARD.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... n PAGES (see addition 2 of variant 5)

Effect
Scrolls one screen page back (but no further than the first page; corresponds to the command field entry P-).

Addition 2
... n PAGES

Effect
Scrolls n pages backwards (corresponds to the command field entry PP- n ).

Note
When you use the addition ... n PAGES , scrolling is by page, not by screen section.

Variant 7
SCROLL LIST LEFT.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... BY n PLACES

Effect
The display begins with column 1 of the report (i.e. left-justified; corresponds to the command field entry PS--).

Addition 2
... BY n PLACES

Effect
Shifts the report n columns. You determine the direction using the parameters ...LEFT... or ...RIGHT... (corresponds to the command field entries PS+ n and PS- n ).

Example
Scroll report at last list level displayed 2 columns to the left.


SCROLL LIST LEFT BY 2 PLACES.



Variant 8
SCROLL LIST RIGHT.

Additions



1. ... INDEX idx (see addition 1 of variant 1)
2. ... BY n PLACES (see addition 2 of variant 7)

Effect
Shifts the display to the right until that side of the report so far not visible on the screen is fully visible (i.e. right- justified). This only makes sense with reports that are defined wider than the standard screen size by REPORT ... LINE-SIZE corresponds to the command field entry PS++).

Note
Horizontal scrolling is also affected by the area boundaries set (SET SCROLL-BOUNDARY ) and by "unmovable" lines (NEW-LINE NO-SCROLLING ).

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