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Geometric subclass: #Circle
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instanceVariableNames: 'center radius'
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classVariableNames: ''
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poolDictionaries: ''
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category: 'Graphics-Geometry'
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!
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!Circle class methodsFor: 'documentation'!
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copyright
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"
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COPYRIGHT (c) 1995 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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version
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"
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$Header: /cvs/stx/stx/libbasic2/Circle.st,v 1.1 1995-06-06 04:01:34 claus Exp $
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"
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!
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documentation
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"
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This class implements a circles which are defined by a radius and
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a centerpoint.
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"
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! !
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!Circle class methodsFor:'instance creation'!
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center:centerPoint radius:radius
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"Return a new Circle."
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| aCircle |
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^ self new center:centerPoint radius:radius
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! !
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!Circle methodsFor:'converting'!
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asEllipticalArc
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^ EllipticalArc center:center radius:radius
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! !
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!Circle methodsFor:'displaying'!
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displayStrokedOn:aGC
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aGC displayArcX:boundingBox left
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y:boundingBox top
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width:boundingBox width
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height:boundingBox height
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from:0
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to:360
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!
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displayFilledOn:aGC
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aGC fillArcX:boundingBox left
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y:boundingBox top
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width:boundingBox width
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height:boundingBox height
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from:0
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to:360
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! !
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!Circle methodsFor:'accessing'!
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center:centerPoint radius:radiusNumber
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"set the center and radius"
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center := centerPoint.
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radius := radiusNumber
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!
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center
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"return the center."
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^ center
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radius
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"return the radius."
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^ radius
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!
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startAngle
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"return the startAngle.
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For circles, this is arbitrary; for compatibility with arcs."
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^ 0
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!
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sweepAngle
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"return the sweepAngle.
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For circles, this is always 360 degrees; for compatibility with arcs."
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^ 360
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! !
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