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The Graphical User Interface

18/09/2020

X-Windows also works directly with networks, which allows the GUI display to be on one computer and the application that the user needs on another computer. It does not matter if the two computers are in different rooms or on elaspirador-escoba.com different continents. It addition to the three common GUI components, X-Windows has a collect of application tools and utilities as a built in X-Library. Figure 2 illustrates a TCL/TK GUI that uses the X-Library utilities.

graphical user interface software

Miller also pointed out that by expanding the identification criteria from one to more dimensions people could handle more choices and remember more. Later researchers expanded on Miller recoding to develop the concept that people chuck information together in order to remember more information . This research has direct impact on GUI design, especially concerning the number of cursospara.net menu items and icons. The retina of eye can only focus on about on a very small portion of a computer screen, or anything for that matter, at any one time . This is because, at a distance greater than 2.5 degrees from the point of fixation, visual acuity decreases by half. Therefore, a circle of radius 2.5 degrees around the point of fixation is what the user can see clearly.

graphical user interface software

Miller showed that absolute identification using one-dimensional criteria was about seven items, plus or minus two. Miller introduced the concept of recoding as a method that people use to store information.

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graphical user interface software

Although a separate GUI standard, many X-Window based GUI, such as Motif and TCL/TK, have copied the look and feel of the IBM SAA. X-Windows is still the underlying library for these GUI. The X-Windowing System is the most popular GUI for UNIX systems. This is because any X-Windows software can use the X-Windows library, which gives it great portability and standardization across platforms. Figure 1 illustrates a typical X-Windows GUI with three common icons. Researchers at the Xerox Palo Alto Research Center designed the first application with a GUI, the Xerox Star, in 1977.

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Gui

The Xerox Star was unique because the researchers carefully designed the computer human interface before they began designing the internal workings of the application. Unfortunately, the Xerox Star was too slow, and it was not commercially successful. The historical development of the GUI still impacts the three major GUI paradigms in the market today. Historically, all modern GUI are off-shoots of the Apple Macintosh.

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Once the user has a desired fixation point, there is a limit to the amount of information that the person can process at one time. A GUI design rule of thumb is that the range of options or choices should never be more than five or six .

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