Scroll
As scroll ( English scrolling ), the shifting of display screens (both text and graphics), respectively. The purpose is to display extensive content in a limited space (such as screens, windows, list boxes, etc.). To operate the scrolling, there is usually a slider on a so-called scroll bar at the edge of the window .
"Smooth scrolling" is the slightly delayed, pixel-by-pixel tracking of the image content to be shifted. In English, scrolling means scrolling , which comes from scroll for scroll . Technically, the scrolling can be done both by software and by hardware e.g. B. be implemented with the help of the graphics card.
history
With the limited graphics capabilities of earlier computers, there was no scroll bar, and a mouse was only optional. Instead, the scroll lock key could be used to toggle the function of the cursor keys so that the cursor retained its vertical position on the screen and the image content was shifted instead.
Due to the growing popularity of touchpads and mice with scroll wheels , scroll bars are only displayed in many newer user interfaces when the user is actually scrolling. Buttons for scrolling at the end of the scrollbar are not required in such surfaces. This is intended to further simplify the user interface.
Scroll bar
A scroll bar is a control of a graphical user interface . As soon as only a section of the actual content, for example text, can be displayed, the displayed section can be changed by operating the scroll bar and any position of the content can be reached. Most scroll bars contain a movable element, the scroll box. The scroll bar can be operated with the touchpad or the mouse . There are horizontal and vertical scroll bars.
Scrolling in computer games
Many two-dimensional computer games are side-scrollers ; scrolling allows the player to explore areas that are outside the screen. This is found in particular in the computer game genres Jump 'n' Run (platform games such as Super Mario ) and Shoot 'em up (shooting games). With the latter, a distinction is made as to whether they scroll horizontally, vertically or diagonally. The first game with scrolling was the racing game Super Bug from Atari, 1977. The first known was Defender . Moon Patrol was the first to have parallax scrolling , with the foreground moving faster than the background.
Kinetic scrolling
For kinetic scrolling (English kinetic scrolling ) is it is a Scrollart, often on devices with touch screen is used. The screen content moves synchronously with the finger, which is swiping across the touchscreen surface. When you leave the surface, the scrolling does not stop immediately, but is slowly delayed until it comes to a standstill. This offers the advantage, for example, that the content can scroll past at a higher speed by swiping more quickly, thus avoiding time-consuming linear scrolling, for example to the end of a document.