scroll bar


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scroll bar

[′skrōl ‚bär]
(computer science)
A horizontal or vertical bar that contains a box that is clicked and dragged up, down, left, or right in order to scroll the screen.

scroll bar

(graphics)
A widget found in graphical user interfaces and used to show and control ("scroll") which portion of a document is currently visible in a window. A window may have a horizontal or, most often, vertical scroll bar or both.

A vertical scroll bar is a narrow strip drawn up the side of the window containing a "bubble" whose position in the scroll bar represents the position of the visible part within the whole document. By dragging the bubble with the mouse the user can scroll the view over the entire document. Arrow buttons are usually provided at the end(s) of the scroll bar to allow the window to be scrolled by a small amount, e.g. one line of text, in either direction by clicking them with the mouse. Some programs provide a second pair of buttons for scrolling a page at a time or some other unit. Clicking on the scroll bar outside the bubble will either, depending on the particular WIMP, move the bubble to that point or move it some amount (typically a screenful) in that direction.

Different WIMP systems define different standards for whether scroll bars appear on the left or right, top or bottom of the window, and for their behaviour.

To reduce mouse movement, the up and down scroll buttons should either be next to each other at one end of the scroll bar (as in NEXTSTEP) or should reverse their effect when clicked with the right-hand mouse button (as in the X Window System and RISC OS). The fraction of the scroll bar filled by the bubble should indicate the fraction of the document visible in the window.

scroll bar

A vertical bar on the right side of a window or a horizontal bar at the bottom of a window that is used to move the window contents up and down or left and right. The bar contains a "thumb", which looks like an elevator in a shaft. When dragged with the mouse, the window contents move correspondingly. When the bar is clicked above or below the thumb, the contents are moved a page at a time. The arrows are clicked to move one line at a time.

Becoming Somewhat Obsolete
Since the advent of scroll mice, which use a wheel for vertical and horizontal scrolling, the scroll bar is being used less and less on desktop applications. In addition, tablet and smartphone content is scrolled by fingers, and a scroll bar was never a natural part of the interface. See scroll mouse.


Scroll Bars
Clicking in the bar or dragging the thumb moves the contents within the window. The Mac example (right) shows an optional variation that places both scroll arrows in the same vicinity to lessen mouse movement when switching directions.
References in periodicals archive ?
When the type of question was analyzed in relation to level of difficulty, the results showed that pictures occurred most frequently for students whose RIT level was lower than 176, and long passages with scroll bars occurred most frequently for students whose RIT level was higher than 186 (a 10.
We set the speeds of the planes as parameters, and use a scroll bar to vary time, causing the planes to trace out curves.
Now select the scroll bar (see screenshot, page 76) from the Forms toolbar and draw the scroll bar in the worksheet near Base Quarter Sales.
The focus of the analyses was on movement time, defined as the time it took the participant to touch a target button after releasing the start hold button for the button tasks and the time required to slide the bar past the target point for the scroll bar tasks.
The Maintenance transition report above also has the following fields accessible with the scroll bar to the right.
Using the mouse, you can move the white box to the bottom of the scroll bar, and when you do this you are instantly taken to the end of the file.
Usually, the only clue the user gets is the activation of the scroll bar on the right-hand side of the Web page.
Picture Window contains a scroll bar which lets users scroll more of the picture into view whenever the window is smaller than the dimensions of the picture.
0, this option simply changed the looks of the user buttons on the right side of the screen, the mouse pointer, and the scroll bar.
Nasdaq:CY) today announced that Microsoft's revolutionary new Arc Touch Mouse uses the Cypress CapSense([R]) solution for the touch scroll strip that lets users navigate documents and Web pages without using the on-screen scroll bar.
Would a scroll bar the size of the M6 appear along the bottom, or would there be a line wrap after every word?
The TrackPoint pointing device provides cursor control with press-to-select and Internet scroll bar.