50 lines
2.4 KiB
Plaintext
50 lines
2.4 KiB
Plaintext
{ (define LIBNAME "A Functional Drawing Library (HtDC)")
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(include "head.tinc") }
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This `draw' package provides classes and methods for modeling in a visual
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world. Here is its class diagram of public fields and methods:
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<pre>
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<code>
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+-----------------------------------+
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| abstract World |
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+-----------------------------------+ +---------------------------------------+
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| Canvas theCanvas |------>| Canvas |
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+-----------------------------------+ +---------------------------------------+
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| boolean bigBang(int,int,double) | +---------------------------------------+
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| boolean endOfTime() | | boolean start(int,int) |
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| boolean endOfWorld() | | boolean stop() |
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| World lastWorld() | | boolean drawCircle(Posn,int,Color) |
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| | | boolean drawDisk(Posn,int,Color) |
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| abstract World onTick() | | boolean drawRect(Posn,int,int,Color) |
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| abstract World onKeyEvent(String) | | boolean drawLine(Posn,Posn,Color) |
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| abstract boolean draw() | | boolean drawString(Posn,String) |
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| abstract boolean erase( | | boolean clearCircle(Posn,int,Color) |
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+-----------------------------------+ | boolean clearDisk(Posn,int,Color) |
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| boolean clearRect(Posn,int,int,Color) |
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| boolean clearLine(Posn,Posn,Color) |
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+---------------------------------------+
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+----------+
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| Posn |
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+----------+
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| int x |
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| int y |
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+----------+
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+-------+
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| Color |
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+-------+
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/ \
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---
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------------------------------------------
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| | | | |
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+-------+ +-------+ +-------+ +-------+ +-------+
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| Blue | | Green | | Red | | White | | Yellow|
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+-------+ +-------+ +-------+ +-------+ +-------+
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</code>
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</pre>
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{(include "foot.tinc")}
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