W
- wakeup demand
- A message from the Power Manager that informs a sleep procedure that it must reverse whatever steps it followed when it prepared for the sleep state.
- wakeup timer
- A timer that the Power Manager uses to return a portable Macintosh computer from the sleep state to the operating state at a specific time.
- wake up
- To make a previously suspended process eligible to receive CPU time.
- warning
- A diagnostic message posted by QuickDraw GX whenever an application executes a function that may likely not provide the result expected. Execution continues internally, as if the warning had not been posted. A warning number is a unique number in the range _26999 through _26000 assigned to each QuickDraw GX warning message. Each warning has a unique warning name.
- warning name
See: warning
- warning number
See: warning
- waveform
- The shape of a wave (a graph of a wave's amplitude over time).
- wavelength
- The extent of one complete cycle of a wave.
- wave amplitude
- The height of a sound wave at an instant of time
See also: amplitude
- wave table
- A sequence of wave amplitudes measured at fixed intervals.
- wave-table data
- Any set of values that represent a sound by a wave table.
- weak import
See: weak symbol
- weak library
- A shared library that does not need to be present at runtime for the client application to run. Sometimes called a soft library.
- weak symbol
- A symbol that does not need to be present in any of the client application's import libraries at runtime. Also known as aweak import or soft import.
- weak type
- A glyph directionality that depends on context to determine whether it is left to right or right to left
See also: neutral type, strong type
- wedge
- A pie-shaped segment of an oval, bounded by a pair of radii joining at the oval's center.
- western numerals
- For the Macintosh script management system, the numerical symbols 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0. Sometimes known as Arabic numerals, but not to be confused with the numerals native to the Arabic writing system.
- white level
- The degree of whiteness in an image. It is a common video digitizer setting.
- white point
See: reference white point
- whose descriptor record
- A coerced AE record of descriptor type typeWhoseDescriptor. The Apple Event Manager creates whose descriptor records when it resolves object specifier records that specify formTest.
- whose range descriptor record
- A coerced AE record of type typeWhoseRange. Under certain conditions, the Apple Event Manager coerces a range descriptor record to a whose range descriptor record when it resolves object specifier records that specify formTest.
- widest-need evaluation
- An evaluation method in which the widest format of all of the operands in a complex expression is used as the format in which the expression is evaluated.
- wide number
- A 64-bit signed integer with unspecified bias.
- winding fill
- A shape fill that follows the winding-number rule.
- winding-number rule
- A rule used when drawing filled shapes to determine which areas are filled. The winding-number rule fills areas that lie under overlapping contours
See also: even-odd rule
- window
- An area on the screen that displays information. The user can open or close a window; in some cases the user can also move the window around on the desktop, change its size, scroll through it, and edit its contents.
- window attribute
- A window feature that the application sets upon the creation of the window. A feature may be a user-interface object, such as a collapse box or close box, or a system-related behavior, such as whether the window will receive update events or activate events. A window may have one or more attributes.
- window class
- A constant specifying the visual priority of a window. Class information allows windows to be grouped into layers for display and tracking.
- window color table
- The data structure in which the Window Manager stores the colors to be used for drawing a window's frame and for highlighting selected text.
- window component
- The portion of an 'hwin' resource in which you associate an 'hrct' or 'hdlg' resource to a particular window.
- window definition function
- A function that defines the general appearance and behavior of a window. The Window Manager calls the window definition function to draw the window's frame, determine what region of the window the cursor is in, draw the window's size box and zoom box, move and resize the window, and calculate the window's structure and content regions.
- window definition ID
- An integer that specifies the resource ID of a window definition function in the upper 12 bits and an optional variation code in the lower 4 bits. When creating a new window, your application supplies a window definition ID either as a field in the 'WIND' resource or as a parameter to the NewWindow or NewCWindow function.
- window header
- A control that runs along the top of a window's content region and provides information about the window's contents.
- window layer
- The group of all windows that belong to the same class. Each window layer is tracked separately and displayed with a different visual priority.
- window list
- A per-application list maintained by the Window Manager of all the application's windows on the desktop. The frontmost window is first in the window list, and the remaining windows appear in the order in which they are layered on the desktop.
- window list view header
- A type of window header designed to fit between a standard window header and the content region of a window
See also: window header
- Window Manager
- The part of the Mac OS that manages the creation, display, and behavior of windows
See also: window
- Window Manager port
- A graphics port that represents the desktop area on the main monitor"that is, a rectangle that occupies all of the main monitor except for the area occupied by the title bar.
- window origin
- The upper-left corner of a window's content area. Usually specified as (0,0), the window origin is expressed in coordinates local to the window.
- window property
- Any arbitrary piece of data that an application may associate with a window.
- window record
See: window structure
- window region
- A special-purpose region of a window
See also: close region, collapse region, content region, drag region, proxy icon region, size region, structure region, title bar region, title text region, zoom region
- window structure
- A data structure of type WindowRecord (or CWindowRecord) in which the Window Manager stores many of a window's characteristics, including the window's graphics port, title, visibility status, and control list.
- window type
- A collection of characteristics"such as the shape of the window's frame and the features of its title bar"that describe a window.
- with-stream kerning
- The automatic movement of glyphs parallel to the line orientation of the text
See also: cross-stream kerning
- with-stream shift
- A positional shift that applies equally to all glyphs in a style run by adding or removing space before or after each glyph in the run
See also: cross-stream shift
- word
- A 16-bit quantity, used to store 216 (or 65,536) possible values.
- word boundary
- The memory location that divides two words.
- word callback procedure
- An application-defined procedure that is executed whenever the Speech Manager is about to speak a word.
- word wrap
See: line breaking
- working directory
- A temporary directory reference by which the File Manager specifies both a directory and the volume on which it resides. The File Manager assigns a reference number to each working directory.
- working directory control block
- A data structure that contains the directory ID of a working directory as well as the volume reference number of the volume on which the directory is located.
- working directory reference number
- A temporary reference number that encodes a directory ID and a volume reference number. It can be used in place of the volume reference number in most File Manager calls.
- WorldScript
- A Mac OS programming model for developing international applications. Encompassing technologies that became available in System 7.1, WorldScript defines an approach to programming and software design that includes the use of human interface design strategies and specific programming interfaces supplied by the operating system.
- WorldScript I
- A Mac OS service that supports the display, manipulation, and printing of 1-byte complex text-encoding systems for such languages as Hebrew and Arabic.
- WorldScript II
- An operating system service in Mac OS 8 and System 7 that supports the display, manipulation, and printing of 2-byte text-encoding systems, such as Chinese and Japanese.
- write privileges
See: Make Changes privileges
- write-data structure
- A data structure that contains a series of pairs of length words and pointers. Each pair indicates the length and location of a portion of the data that constitutes the packet to be sent over the network.
- write-through cache
- A cache whose information is immediately written to RAM whenever that information changes
See also: copy-back cache
- writing system
- A set of characters and the basic rules for their use in creating a visual depiction of language. Writing systems may differ in the direction in which their characters and lines run, the size of the character set used, and the context sensitivity of character selection. Writing systems include Roman, Japanese, Arabic, and Hebrew
See also: script system, language, region
- wrong type error
- A QuickDraw GX error indicating that an invalid type has been assigned to a shape.