Scroll Bars (Control Element) (SAP Library - BC

Scroll Bars (Control Element)

Scroll bars inform the user that there is more information available than displayed on the current screen. The user can view the hidden portions of the available information.

Illustration

Horizontal scroll bar

Purpose

Scroll bars can refer to an entire window as well as to parts of a screen such as tables or lists. They are to be used in the following cases:

The size of the information exceeds the size of the window.
A window is reduced so much that the displayed information does not fit in the window.

Appearance

Structure

Scroll bars consist of the following parts:

the scroll arrows, which appear at each end of the scroll bar or which are displayed next to each other
the scroll bar shaft represents the amount of information you can scroll through
the slider box, which represents how far the current view of the information is from the top (for vertical scroll bars) or from the left edge (for horizontal scroll bars).

Design Guidelines

Scroll bars should extend over the entire height or width of the area to be scrolled.

Implementation

The platform-specific appearance is used for scroll bars.

Use/Functionality

A window can have vertical and horizontal scroll bars. They can only be operated with the mouse. You can scroll as follows:

By clicking on the scroll arrows at the end of the scroll bar, you can scroll forwards or backwards one line .

By clicking onto the free area in the scroll bar, you can scroll forwards or backwards one screen .

You can also scroll vertically screen by screen using the keys "Previous page" ( F22 or PgUp), "Next page" ( F23 or PgDn) or pushbuttons in the work area.

By dragging the slider box, you can move quickly anywhere in the information. The slider box displays the current relative position. Depending on the platform, its size can be predefined or display the relative size of the visible section.

Other scroll options (first/last page, next/previous page) are offered with the function keys F21 - F24 (or corresponding scroll keys on the keyboard) and the scroll arrows in the standard toolbar which are to be operated with the mouse.

Technical Notes

Scroll bars are made available by the Basis Department.

General

If the current window size is smaller than the screen size, horizontal or vertical scroll bars are activated automatically.

ABAP/4 Lists

Scroll bars are activated automatically in ABAP/4 lists. They are active if the list exceeds one screen page (depending on the window size).

Step Loops

In step loops, scroll bars can be activated manually. The following requirements are necessary to do this:

an internal table is displayed in the step loop
the ABAP/4 statement LOOP AT itab is used. Refer to the online help in the processing logic for LOOP.

In all other cases, usually no scroll bars appear.

Cross-References

Control Elements - Overview

First Page, Last Page (Function)

Previous Page, Next Page (Functions)