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・ Window sill
・ Window Snyder
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・ Window to Paris
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・ Window Up Above
・ Window valance
・ Window Water Baby Moving
・ Window-Eyes
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Windowing system
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・ WindowProc
・ Windows (Amanda Somerville album)
・ Windows (Charlie Daniels album)
・ Windows (disambiguation)
・ Windows (film)
・ Windows (Jon Lord album)


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Windowing system : ウィキペディア英語版
Windowing system

In computing, a windowing system (or window system) is a type of graphical user interface (GUI) which implements the WIMP (windows, icons, menus, pointer) paradigm for a user interface. Each currently running application is assigned a usually resizeable and usually rectangular shaped surface of the display to present its graphical user interface to the user; these windows may overlap each other, as opposed to a tiling interface where they are not allowed to overlap. Usually a window decoration is drawn around each window. The programming of both the window decoration and of available widgets inside of the window, which are graphical elements for direct user interaction, such as sliders, buttons, etc., is eased and simplified through the use of widget toolkits.
== Technical details ==
The main component of any windowing system is usually called the display server, although alternative denominations such as window server or compositor are also in use. Any application that runs and presents its GUI in a window, is a client of the display server. The display server and its clients communicate with each other over a communications protocol, which is usually called display server protocol, the display server being the mediator between the clients and the user. It receives all the input from the kernel, that the kernel receives from all attached input devices, such as keyboard, pointing devices, or touchscreen and transmits it to the correct client. The display server is also responsible for the output of the clients to the computer monitor. The output of sound is usually not managed by the display server, but the sound volume, is usually handled through GUI applets and it is the display server who decides which applications are on top. A windowing system enables the computer user to work with several programs at the same time. Each program presents its GUI in its own window, which is generally a rectangular area of the screen.
From a programmer's point of view, a windowing system implements graphical primitives. For example: rendering fonts or drawing a line on the screen. It provides an abstraction of the graphics hardware for use by higher-level elements of the graphical interface such as a window manager.
A display server protocol can be network capable or even network transparent, facilitating the implementation of thin clients.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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