Design Recipe1

Description

Draw a rectangle of a given width and height in pixels

Contract/Purpose statement

Function name

Domain

Range

rectangle

number number string string

image

Examples

Example 1

(rectangle 400 400 "solid" "White")

Example 2

(rectangle 100 250 "outline" "blue")

Definition

rectangle  (width height style color)

Design Recipe 2

Description

Draw a canvas

Contract/Purpose statement

Function name

Domain

Range

blank

rectangle

image

Examples

Example 1

(define blank (rectangle 100 100 "solid" "white"))

Example 2

(define blank (rectangle 100 100 "solid" "white"))

Definition

(define fcn-name (rectangle width height style color))

Actual wescheme coding syntax:

(define blank (rectangle 400 400 "solid" "white"))

Design Recipe 3

Description

Place rectangle at a specific location on canvas

Contract/Purpose statement

Function name

Domain

Range

put-image

rectangle

image

Examples

Example 1

(put-image (rectangle) 200 360)

Example 2

(put-image (rectangle) 150 350)

Definition

(put-image (rectangle width height style color) x y)

Actual wescheme coding syntax:

(define Mond-example

(put-image ( ...) x y
(put-image ( ...) x y
(put-image ( ...) x y
(put-image ( ...) x y

...blank)))))

add ")" for each additional put-image command added