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geometry management
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The process whereby a composite controls the geometrical properties of
its child contacts; the composite is referred to as the geometry
manager.
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glyph
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An image, typically of a character, in a font.
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grab
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Keyboard keys, the keyboard, pointer buttons, the pointer, and the
server can be grabbed for exclusive use by a client. In
general, these facilities are not intended to be used by normal
applications but are intended for various input and window managers to
implement various styles of user interfaces.
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gcontext
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Shorthand for graphics context.
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graphics context
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Various information for graphics output is stored in a graphics
context (or gcontext), such as foreground pixel, background pixel,
line width, clipping region, and so forth. A graphics context can only
be used with drawables that have the same root and the same depth as
the graphics context.
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gray scale
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A degenerate case of pseudo color, in which the red, green, and blue
values in any given colormap entry are equal, thus producing shades of
gray. The gray values can be changed dynamically.