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added a note about how label-string? is used.

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Robby Findler 2010-12-12 08:16:53 -06:00
parent 29797e67bd
commit 8101c03d30
1 changed files with 9 additions and 1 deletions
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10
collects/scribblings/gui/miscwin-funcs.scrbl
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@ -372,7 +372,15 @@ See @racket[clipboard<%>].
} }
@defproc[(label-string? [v any/c]) boolean?]{ @defproc[(label-string? [v any/c]) boolean?]{
Returns @racket[#t] if @racket[v] is a string whose length is less than or equal to @racket[200]. Returns @racket[#t] if @racket[v] is a string whose length is less than or equal to @racket[200].
This predicate is typically used as the contract for strings that
appear in GUI objects. In some cases, such as the label in a @racket[button%]
or @racket[menu-item%] object, the character @litchar{&} is treated specially
to indicate that the following character is used in keyboard navigation. See
@xmethod[labelled-menu-item<%> set-label] for one such example.
In other cases, such as the label on a @racket[frame%], @litchar{&} is not
treated specially.
} }
@defproc[(key-code-symbol? [v any/c]) boolean?]{ @defproc[(key-code-symbol? [v any/c]) boolean?]{