53 lines
2.4 KiB
Plaintext
53 lines
2.4 KiB
Plaintext
{ (define LIBNAME "An Imperative Drawing Library (HtDC)")
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(include "head.tinc") }
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This `idraw' package provides classes and imperative methods for
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a visual 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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| void bigBang(int,int,double) | +------------------------------------+
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| World endOfTime() | | void show() |
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| World endOfWorld() | | void close() |
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| abstract void onTick() | | void drawCircle(Posn,int,Color) |
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| abstract void onKeyEvent(String)| | void drawDisk(Posn,int,Color) |
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| abstract void draw() | | void drawRect(Posn,int,int,Color) |
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| abstract void erase() | | void drawLine(Posn,Posn,Color) |
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+---------------------------------+ | void drawString(Posn,String) |
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| void clearCircle(Posn,int,Color) |
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| void clearDisk(Posn,int,Color) |
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| void clearRect(Posn,int,int,Color) |
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| void 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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