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Node:Grob interfaces, Next:Items and Spanners, Previous:Setting grob properties, Up:Grobs
Grob interfaces
Grob properties form a name space where you can set variables per
object. Each object however, may have multiple functions. For example,
consider a dynamic symbol, such \ff (fortissimo). It is printed
above or below the staff, it is a dynamic sign, and it is a kind of
text.
To reflect this different functions of a grob, procedures and variables are grouped into so-called interfaces. The dynamic text for example supports the following interfaces:
font-interface- The glyph is built from characters from a font, hence the
font-interface. For objects supportingfont-interface, you can select alternate fonts by settingfont-style,font-point-size, etc. dynamic-interface- Dynamic interface is not associated with any variable or function in
particular, but this makes it possible to distinguish this grob from
other similar grobs (like
TextScript), that have no meaning of dynamics. text-interface- This interface is for texts that are to be set using special routines
to stack text into lines, using kerning, etc.
general-grob-interface- This interface is supported by all grob types.
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Copyright (c) 1997--2001 Han-Wen Nienhuys and Jan Nieuwenhuizen.
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