21 lines
591 B
Racket
21 lines
591 B
Racket
#lang racket/gui
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(define parts 4)
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(define dc (new printer-dc%))
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(send* dc (start-doc "Colour Pinstripe") (start-page))
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(define-values [W H] (send dc get-size))
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(define parts 4)
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(define colors
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'("Black" "Red" "Green" "Blue" "Magenta" "Cyan" "Yellow" "White"))
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(send dc set-pen "black" 0 'transparent)
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(send dc set-brush "black" 'solid)
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(define H* (round (/ H parts)))
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(for ([row parts])
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(define Y (* row H*))
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(for ([X (in-range 0 W (add1 row))] [c (in-cycle colors)])
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(send dc set-brush c 'solid)
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(send dc draw-rectangle X Y (add1 row) H*)))
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(send* dc (end-page) (end-doc))
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