41 lines
1.6 KiB
Racket
41 lines
1.6 KiB
Racket
#lang scribble/doc
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@(require "common.rkt")
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@defclass/title[brush-list% object% ()]{
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A @racket[brush-list%] object maintains a list of @racket[brush%]
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objects to avoid creating brushes repeatedly. A @racket[brush%]
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object in a brush list cannot be mutated.
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A global brush list, @racket[the-brush-list], is created
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automatically.
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@defconstructor[()]{
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Creates an empty brush list.
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}
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@defmethod*[([(find-or-create-brush [color (is-a?/c color%)]
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[style (or/c 'transparent 'solid 'opaque
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'xor 'hilite 'panel
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'bdiagonal-hatch 'crossdiag-hatch
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'fdiagonal-hatch 'cross-hatch
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'horizontal-hatch 'vertical-hatch)])
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(is-a?/c brush%)]
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[(find-or-create-brush [color-name string?]
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[style (or/c 'transparent 'solid 'opaque
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'xor 'hilite 'panel
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'bdiagonal-hatch 'crossdiag-hatch
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'fdiagonal-hatch 'cross-hatch
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'horizontal-hatch 'vertical-hatch)])
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(or/c (is-a?/c brush%) #f)])]{
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Finds a brush of the given specification, or creates one and adds it
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to the list. See @racket[brush%] for a further explanation of the
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arguments, which are the same as @racket[brush%]'s initialization
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arguments.
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}}
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