A
brush-list% object maintains a list of
brush%
objects to avoid creating brushes repeatedly. A
brush%
object in a brush list cannot be mutated.
A global brush list, the-brush-list, is created
automatically.
Creates an empty brush list.
|
| → (is-a?/c brush%) |
| color : (is-a?/c color%) |
| | style | | : | | | (one-of/c 'transparent 'solid 'opaque | | 'xor 'hilite 'panel | | 'bdiagonal-hatch 'crossdiag-hatch | | 'fdiagonal-hatch 'cross-hatch | | 'horizontal-hatch 'vertical-hatch) |
|
|
|
| → (or/c (is-a?/c brush%) false/c) |
| color-name : string? |
| | style | | : | | | (one-of/c 'transparent 'solid 'opaque | | 'xor 'hilite 'panel | | 'bdiagonal-hatch 'crossdiag-hatch | | 'fdiagonal-hatch 'cross-hatch | | 'horizontal-hatch 'vertical-hatch) |
|
|
Finds a brush of the given specification, or creates one and adds it
to the list. See
brush% for a further explanation of the
arguments, which are the same as
brush%’s initialization
arguments.