"
COPYRIGHT (c) 1995 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
Object subclass:#Geometric
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Graphics-Geometry'
!
Geometric comment:'
COPYRIGHT (c) 1995 by Claus Gittinger
All Rights Reserved
$Header: /cvs/stx/stx/libbasic/Geometric.st,v 1.2 1995-08-10 12:28:22 claus Exp $
'!
!Geometric class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1995 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
version
"
$Header: /cvs/stx/stx/libbasic/Geometric.st,v 1.2 1995-08-10 12:28:22 claus Exp $
$Revision: 1.2 $
"
!
documentation
"
Abstract superclass for geometric figures.
Concrete classes are (currently) Rectangle, Polygon and the classes
found in goodies/shape.
These are not graphical objects, but pure mathematical ones.
I.e. instances do not carry graphics attributes such as color, lineWidth etc.
Use instances of (subclasses) of DisplayObject or (the soon to be
implemented GraphicsAttributesWrapper.
Notice: ST/X does not use Geometric instances for drawing (yet).
This class exists mainly to provide have a superclass around,
when ST-80 geometry classes are to be filed in.
"
! !
!Geometric methodsFor:'displaying'!
displayOn:aGC
"display myself on a graphicsContext; the current graphics
attributes are used. The default here is to display the outline."
^ self displayStrokedOn:aGC
!
displayStrokedOn:aGC
"display my outline on a graphicsContext; the current graphics
attributes are usedSince we do not know how to do it, nothing is
drawn here."
"/ could be:
"/ ^ self subclassResponsibility
^ self
!
displayFilledOn:aGC
"display myself filled on a graphicsContext; the current graphics
attributes are used. Since we do not know how to do it, nothing is
drawn here."
"/ could be:
"/ ^ self subclassResponsibility
^ self
! !