Graphics: Legacy Library
 
1 Basic Commands
2 Position Operations
3 Color Operations
4 Draw, Clear, and Flip Operations
5 World Operations
6 Miscellaneous Operations
7 An Example
8 A More Complicated Example
9 Protecting Graphics Operations
10 Mouse Operations
11 Keyboard Operations
12 Flushing
13 Graphics Library as a Unit
Version: 4.0.2
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7 An Example

  (open-graphics)

  ; nothing appears to happen, but the library is initialized...

  

  (define w (open-viewport "practice" 300 300))

  ; viewport window appears

  

  ((draw-line w) (make-posn 30 30) (make-posn 100 100))

  ; line appears

  

  (close-viewport w)

  ; viewport disappears

  

  (close-graphics)

  ; again, nothing appears to happen, but

  ; unclosed viewports (if any) would disappear

 

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