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"
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6
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COPYRIGHT (c) 1992 by Claus Gittinger
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71
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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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Object subclass:#GraphicsContext
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instanceVariableNames:'paint bgPaint
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function font
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lineStyle lineWidth
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joinStyle capStyle
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mask maskOrigin transformation'
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classVariableNames:'White Black DefaultFont'
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poolDictionaries:''
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category:'Graphics-Support'
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!
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GraphicsContext comment:'
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COPYRIGHT (c) 1992 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libview/Attic/GC.st,v 1.16 1995-06-06 04:06:53 claus Exp $
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'!
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!GraphicsContext class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1992 by Claus Gittinger
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71
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All Rights Reserved
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46
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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/libview/Attic/GC.st,v 1.16 1995-06-06 04:06:53 claus Exp $
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"
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!
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documentation
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"
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this is an abstract superclass for all kinds of graphic drawables -
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both windows and printed pages (i.e. printers) are inheriting from
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this class (even drawables not at all associated with any device would do so).
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Drawing is done in paint/bgPaint colors, which can be true colors (i.e.
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directly supported by the underlying hardware) or simulated colors
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(i.e. dithered colors or images).
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The paint/bgPaint instance variables are set to the logical colors,
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device specific drawable may like to keep actual colors in addition.
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The transformation instance variable is typically nil, for a 1-to-1
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coordinate mapping (i.e. x/y coordinates are pixels in the drawable).
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If nonNil, the transformation must be an instance of WindowingTransformation
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and offers both a scale-factor and a translation.
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Also, drawing in metric- or inch-units can be done using transformations.
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(see instance creation methods of WindowingTransformation, and examples
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in 'doc/coding').
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All drawing is defined upon a few basic drawing methods, which must be
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implemented by subclasses (some subclasses also redefine the others for
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more performance)
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Instance variables:
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paint <Color> the paint used for drawing
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bgPaint <Color> the background used for drawing texts and bitmaps
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function <Symbol> the drawing function (i.e. #copy, #or, #xor ...)
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- not all Drawables support every function
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(i.e. paper only allows #copy)
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font <Font> the current font to be used for drawing
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lineStyle <Symbol> the lineStyle (i.e. #solid, #dashed, #doubleDashed)
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lineWidth <SmallInteger> the lineWidth (device dependent, usually pixels)
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joinStyle <Symbol> the style in which lines (in polygons)
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are joined (i.e. #miter, #bevel, #round)
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capStyle <Symbol> the style in which the last point of a line is drawn
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(i.e. #notLast, #butt, #round, #projecting)
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mask <Form> a mask used for drawing
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- not all Drawables support it
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maskOrigin <Point> the origin of the mask relative to
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the drawables origin
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Class variables:
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White <Color> cached white color - its needed so often
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Black <Color> cached black color - its needed so often
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DefaultFont <Font> default font to use
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"
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! !
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!GraphicsContext class methodsFor:'initialization'!
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initialize
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"setup some defaults - these are usually redefined
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during startup."
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Color isNil ifTrue:[^ self].
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White isNil ifTrue:[
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Color initialize.
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White := Color white on:Display.
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Black := Color black on:Display.
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Font initialize.
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DefaultFont := Font family:'courier' face:'medium' style:'roman' size:12
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]
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! !
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!GraphicsContext class methodsFor:'accessing defaults'!
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defaultFont:aFont
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"set the default font used for drawing"
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DefaultFont := aFont
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!
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defaultFont
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"get the default font used for drawing"
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DefaultFont isNil ifTrue:[
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DefaultFont := Font family:'courier' face:'medium' style:'roman' size:12
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].
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^ DefaultFont
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! !
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!GraphicsContext class methodsFor:'constants'!
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joinRound
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"return a constant to specify round join"
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^ #round
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!
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joinMiter
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"return a constant to specify miter join"
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^ #miter
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!
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joinBevel
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"return a constant to specify bevel join"
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^ #bevel
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!
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capNotLast
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"return a constant to specify not-last cap"
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^ #notLast
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!
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capProjecting
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"return a constant to specify projecting cap"
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^ #projecting
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!
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capRound
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"return a constant to specify round cap"
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^ #round
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!
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capButt
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"return a constant to specify butt cap"
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0
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^ #butt
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! !
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!GraphicsContext class methodsFor:'instance creation'!
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new
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"return a new instance of myself. Redefined to initialize
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the new thingy"
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^ self basicNew initialize
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! !
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!GraphicsContext methodsFor:'initialization'!
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initialize
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"set up some useful default values"
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paint := Black.
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bgPaint := White.
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function := #copy.
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lineWidth := 1.
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lineStyle := #solid.
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joinStyle := #miter.
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capStyle := #butt.
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font := DefaultFont.
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0
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! !
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2
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!GraphicsContext methodsFor:'misc'!
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flush
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"st-80 compatibility"
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self device synchronizeOutput
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2
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! !
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!GraphicsContext methodsFor:'accessing'!
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paint
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"return the current paint drawing color"
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^ paint
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!
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paint:aColor
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"set the drawing painting color, aColor can be a dithered one"
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paint := aColor
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!
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paint:fgColor on:bgColor
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"set the paint used for text and bitmaps, both colors may be
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dithered colors"
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self paint:fgColor.
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2
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bgPaint := bgColor
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!
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backgroundPaint
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"return the background paint color.
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(used for opaqueForms and opaqueStrings)"
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^ bgPaint
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!
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backgroundPaint:aColor
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"set the background painting color (which is used for
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opaqueForms and opaqueStrings). aColor can be a dithered one."
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^ self subclassResponsibility
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!
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function
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"return the current drawing function"
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^ function
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!
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function:aFunctionSymbol
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"set the drawing function"
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^ self subclassResponsibility
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!
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lineWidth
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"return the current drawing linewidth"
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^ lineWidth
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!
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lineWidth:aNumber
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"set the line drawing width in pixels"
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2
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lineWidth := aNumber
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0
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!
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lineStyle
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"return the current line-drawing-style"
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^ lineStyle
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!
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lineStyle:aStyleSymbol
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"set the line-drawing-style;
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possible styles are: #solid, #dashed, #doubleDashed"
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2
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lineStyle := aStyleSymbol
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0
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287 |
!
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288 |
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capStyle
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"return the current cap-style for line-drawing"
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^ capStyle
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!
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capStyle:aStyleSymbol
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"set the cap-style for line-drawing;
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possible styles are: #notLast, #butt, #round, #projecting"
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298 |
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^ self subclassResponsibility
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!
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301 |
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joinStyle
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"return the current join-style for polygon-drawing"
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^ joinStyle
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306 |
!
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307 |
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308 |
joinStyle:aStyleSymbol
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"set the join-style of lines in polygon-drawing;
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possible styles are: #miter, #bevel, #round"
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311 |
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^ self subclassResponsibility
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!
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314 |
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mask
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"return the current drawing mask"
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317 |
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^ mask
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319 |
!
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320 |
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mask:aForm
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322 |
"set the drawing mask"
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323 |
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324 |
^ self subclassResponsibility
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325 |
!
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326 |
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327 |
font
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328 |
"return the current drawing font"
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329 |
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330 |
^ font
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331 |
!
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332 |
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font:aFont
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334 |
"set the drawing font"
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335 |
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336 |
^ self subclassResponsibility
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337 |
!
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338 |
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76
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clipRect
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340 |
"return the drawing clip-rectangle"
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341 |
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342 |
^ self subclassResponsibility
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343 |
!
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344 |
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0
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345 |
clipRect:aRectangle
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346 |
"set the drawing clip-rectangle"
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347 |
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348 |
^ self subclassResponsibility
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!
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350 |
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76
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351 |
clippingBounds
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352 |
"for ST-80 compatibility"
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353 |
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^ self clipRect
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355 |
!
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356 |
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0
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357 |
graphicsContext
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358 |
"for ST-80 compatibility"
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359 |
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360 |
^ self
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2
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361 |
!
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362 |
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363 |
viewOrigin
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12
|
364 |
"return the drawables visible origin (for scrolling)"
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365 |
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2
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366 |
^ 0@0
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367 |
!
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368 |
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151
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369 |
phase
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|
370 |
"return the origin within the mask (used to draw with patterns).
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|
371 |
This is an alias for ST/X's #maskOrigin"
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372 |
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373 |
^ self maskOrigin
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374 |
!
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375 |
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376 |
phase:aPoint
|
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109
|
377 |
"set the origin within the mask (used to draw with patterns).
|
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151
|
378 |
This is an alias for ST/X's #maskOrigin:"
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379 |
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|
380 |
^ self maskOrigin:aPoint
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|
381 |
!
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382 |
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383 |
maskOrigin
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|
384 |
"return the origin within the mask (used to draw with patterns).
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|
385 |
Should be redefined in classes which support it.
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|
386 |
This is an alias for ST-80's #phase"
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387 |
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|
388 |
^ maskOrigin
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|
389 |
!
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390 |
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391 |
maskOrigin:aPoint
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|
392 |
"set the origin within the mask (used to draw with patterns).
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|
393 |
Should be redefined in classes which support it.
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|
394 |
This is an alias for ST-80's #phase:"
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395 |
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396 |
^ self maskOriginX:aPoint x y:aPoint y
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|
397 |
!
|
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398 |
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399 |
maskOriginX:x y:y
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|
400 |
"set the origin within the mask (used to draw with patterns).
|
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|
401 |
Should be redefined in classes which support it.
|
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|
402 |
This is an alias for ST-80's #phase:"
|
|
109
|
403 |
|
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12
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404 |
^ self
|
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|
405 |
!
|
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|
406 |
|
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151
|
407 |
setMaskOrigin:aPoint
|
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|
408 |
"set the origin within the mask (used to draw with patterns).
|
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|
409 |
OBSOLETE: use #maskOrigin: or #phase:"
|
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|
410 |
|
|
|
411 |
^ self maskOrigin:aPoint
|
|
|
412 |
!
|
|
|
413 |
|
|
2
|
414 |
setMaskOriginX:x y:y
|
|
109
|
415 |
"set the origin within the mask (used to draw with patterns).
|
|
151
|
416 |
OBSOLETE: use #maskOriginX:y: or #phase:"
|
|
109
|
417 |
|
|
151
|
418 |
^ self maskOriginX:x y:y
|
|
2
|
419 |
!
|
|
|
420 |
|
|
|
421 |
withPattern:aForm do:aBlock
|
|
109
|
422 |
"draw with a pattern.
|
|
|
423 |
Should be redefined in classes which support it"
|
|
|
424 |
|
|
71
|
425 |
'pattern drawing not implemented' errorPrintNL.
|
|
|
426 |
|
|
2
|
427 |
aBlock value
|
|
76
|
428 |
!
|
|
|
429 |
|
|
|
430 |
transformation
|
|
|
431 |
"return the transformation"
|
|
|
432 |
|
|
|
433 |
^ transformation
|
|
|
434 |
!
|
|
|
435 |
|
|
|
436 |
transformation:aTransformation
|
|
|
437 |
"set the transformation"
|
|
|
438 |
|
|
|
439 |
transformation := aTransformation
|
|
0
|
440 |
! !
|
|
|
441 |
|
|
151
|
442 |
!GraphicsContext methodsFor:'ST-80 compatibility'!
|
|
|
443 |
|
|
|
444 |
findFont:aFontDescription
|
|
|
445 |
^ aFontDescription on:self device
|
|
|
446 |
!
|
|
|
447 |
|
|
|
448 |
widthOfString:aString
|
|
|
449 |
^ (font on:self device) widthOf:aString
|
|
|
450 |
!
|
|
|
451 |
|
|
|
452 |
widthOfString:aString from:start to:stop
|
|
|
453 |
^ (font on:self device) widthOf:aString from:start to:stop
|
|
|
454 |
! !
|
|
|
455 |
|
|
71
|
456 |
!GraphicsContext methodsFor:'ST-80 displaying'!
|
|
|
457 |
|
|
|
458 |
displayLineFrom:startPoint to:endPoint translateBy:anOffset
|
|
|
459 |
"draw a line - ST-80 compatibility"
|
|
|
460 |
|
|
|
461 |
self displayLineFrom:(startPoint + anOffset)
|
|
|
462 |
to:(endPoint + anOffset)
|
|
|
463 |
!
|
|
0
|
464 |
|
|
|
465 |
displayRectangularBorder:aRectangle at:aPoint
|
|
|
466 |
"draw a rectangle - ST-80 compatibility"
|
|
|
467 |
|
|
26
|
468 |
self displayRectangle:(aRectangle translateBy:aPoint)
|
|
0
|
469 |
!
|
|
|
470 |
|
|
|
471 |
displayPolyline:aPolygon
|
|
|
472 |
"draw a polygon - ST-80 compatibility"
|
|
|
473 |
|
|
76
|
474 |
^ self displayPolygon:aPolygon
|
|
35
|
475 |
!
|
|
|
476 |
|
|
71
|
477 |
displayArc:origin radius:radius from:startAngle angle:angle
|
|
|
478 |
"draw an arc around a point"
|
|
|
479 |
|
|
|
480 |
self displayArcX:(origin x - radius)
|
|
|
481 |
y:(origin y - radius)
|
|
|
482 |
w:(radius * 2)
|
|
|
483 |
h:(radius * 2)
|
|
|
484 |
from:startAngle angle:angle
|
|
|
485 |
!
|
|
|
486 |
|
|
35
|
487 |
displayArcBoundedBy:boundingBox startAngle:startAngle sweepAngle:sweepAngle at:origin
|
|
|
488 |
"draw an arc/circle/ellipse - ST-80 compatibility"
|
|
0
|
489 |
|
|
35
|
490 |
^ self displayArcX:(boundingBox left + origin x)
|
|
71
|
491 |
y:(boundingBox top + origin y)
|
|
|
492 |
width:(boundingBox width)
|
|
|
493 |
height:(boundingBox height)
|
|
|
494 |
from:startAngle
|
|
|
495 |
angle:sweepAngle
|
|
35
|
496 |
!
|
|
|
497 |
|
|
|
498 |
displayWedgeBoundedBy:boundingBox startAngle:startAngle sweepAngle:sweepAngle at:origin
|
|
|
499 |
"fill an arc/circle/ellipse - ST-80 compatibility"
|
|
|
500 |
|
|
|
501 |
^ self fillArcX:(boundingBox left + origin x)
|
|
71
|
502 |
y:(boundingBox top + origin y)
|
|
|
503 |
width:(boundingBox width)
|
|
|
504 |
height:(boundingBox height)
|
|
|
505 |
from:startAngle
|
|
|
506 |
angle:sweepAngle
|
|
0
|
507 |
! !
|
|
|
508 |
|
|
81
|
509 |
!GraphicsContext methodsFor:'bit blitting'!
|
|
0
|
510 |
|
|
71
|
511 |
copyFrom:aGC x:srcX y:srcY toX:dstX y:dstY width:w height:h
|
|
0
|
512 |
"copy from a drawable - maybe self"
|
|
|
513 |
|
|
|
514 |
^ self subclassResponsibility
|
|
|
515 |
!
|
|
|
516 |
|
|
71
|
517 |
copyFrom:aGC x:dstX y:dstY width:w height:h
|
|
|
518 |
"copy from a drawable - maybe self"
|
|
|
519 |
|
|
|
520 |
self copyFrom:aGC x:0 y:0 toX:dstX y:dstY width:w height:h
|
|
|
521 |
!
|
|
|
522 |
|
|
|
523 |
copyFrom:aGC toX:dstX y:dstY
|
|
0
|
524 |
"copy from a drawable - maybe self"
|
|
|
525 |
|
|
71
|
526 |
self copyFrom:aGC x:0 y:0 toX:dstX y:dstY width:aGC width height:aGC height
|
|
|
527 |
! !
|
|
|
528 |
|
|
76
|
529 |
!GraphicsContext methodsFor:'drawing in device coordinates'!
|
|
|
530 |
|
|
|
531 |
fillDeviceRectangleX:x y:y width:w height:h with:aPattern
|
|
|
532 |
"fill the rectangular area in the receiver with aPattern,
|
|
|
533 |
which may be a Form or Color. Use device coordinates."
|
|
|
534 |
|
|
|
535 |
self withPattern:aPattern do:[
|
|
|
536 |
self fillDeviceRectangleX:x y:y width:w height:h
|
|
|
537 |
]
|
|
|
538 |
!
|
|
|
539 |
|
|
|
540 |
fillDeviceRectangleX:x y:y width:w height:h
|
|
|
541 |
"fill a rectangle with current paint color (device coordinates)"
|
|
|
542 |
|
|
|
543 |
|sav|
|
|
|
544 |
|
|
|
545 |
sav := transformation.
|
|
|
546 |
transformation := nil.
|
|
|
547 |
self fillRectangleX:x y:y width:w height:h.
|
|
|
548 |
transformation := sav
|
|
|
549 |
!
|
|
|
550 |
|
|
|
551 |
displayDeviceLineFromX:x1 y:y1 toX:x2 y:y2
|
|
|
552 |
"draw a line in device coordinates"
|
|
|
553 |
|
|
|
554 |
|sav|
|
|
|
555 |
|
|
|
556 |
sav := transformation.
|
|
|
557 |
transformation := nil.
|
|
|
558 |
self displayLineFromX:x1 y:y1 toX:x2 y:y2.
|
|
|
559 |
transformation := sav
|
|
|
560 |
! !
|
|
|
561 |
|
|
71
|
562 |
!GraphicsContext methodsFor:'filling'!
|
|
|
563 |
|
|
|
564 |
fillRectangle:aRectangle
|
|
|
565 |
"fill a rectangle with current paint color"
|
|
|
566 |
|
|
|
567 |
self fillRectangleX:(aRectangle left)
|
|
|
568 |
y:(aRectangle top)
|
|
|
569 |
width:(aRectangle width)
|
|
|
570 |
height:(aRectangle height)
|
|
|
571 |
!
|
|
|
572 |
|
|
|
573 |
fillArc:origin radius:r from:startAngle angle:angle
|
|
|
574 |
"draw a filled arc around a point"
|
|
|
575 |
|
|
|
576 |
|d|
|
|
|
577 |
d := 2 * r.
|
|
|
578 |
self fillArcX:(origin x - r) y:(origin y - r)
|
|
|
579 |
w:d h:d
|
|
|
580 |
from:startAngle angle:angle
|
|
|
581 |
!
|
|
|
582 |
|
|
|
583 |
fillCircle:aPoint radius:aNumber
|
|
|
584 |
"draw a filled circle around aPoint"
|
|
|
585 |
|
|
|
586 |
self fillCircleX:(aPoint x) y:(aPoint y) radius:aNumber
|
|
|
587 |
!
|
|
|
588 |
|
|
|
589 |
fillCircleX:x y:y radius:r
|
|
|
590 |
"draw a filled circle around x@y"
|
|
|
591 |
|
|
|
592 |
|d|
|
|
|
593 |
|
|
|
594 |
d := 2 * r.
|
|
|
595 |
self fillArcX:(x - r) y:(y - r)
|
|
|
596 |
w:d h:d
|
|
|
597 |
from:0 angle:360
|
|
0
|
598 |
! !
|
|
|
599 |
|
|
|
600 |
!GraphicsContext methodsFor:'basic filling'!
|
|
|
601 |
|
|
|
602 |
fillPolygon:points
|
|
|
603 |
"fill a polygon with current paint color"
|
|
|
604 |
|
|
|
605 |
^ self subclassResponsibility
|
|
|
606 |
!
|
|
|
607 |
|
|
|
608 |
fillRectangleX:x y:y width:w height:h
|
|
|
609 |
"fill a rectangle with current paint color"
|
|
|
610 |
|
|
|
611 |
^ self subclassResponsibility
|
|
|
612 |
!
|
|
|
613 |
|
|
|
614 |
fillArcX:x y:y w:w h:h from:start angle:angle
|
|
|
615 |
"fill an arc with current paint color"
|
|
|
616 |
|
|
|
617 |
^ self subclassResponsibility
|
|
|
618 |
! !
|
|
|
619 |
|
|
71
|
620 |
!GraphicsContext methodsFor:'basic displaying'!
|
|
0
|
621 |
|
|
26
|
622 |
displayPolygon:aPolygon
|
|
0
|
623 |
"draw a polygon
|
|
|
624 |
- this could be recoded to draw using displayLine"
|
|
|
625 |
|
|
|
626 |
^ self subclassResponsibility
|
|
|
627 |
!
|
|
|
628 |
|
|
12
|
629 |
displayArcX:x y:y w:width h:height from:startAngle angle:angle
|
|
0
|
630 |
"draw an arc in a box
|
|
|
631 |
- this could be recoded to draw using displayLine"
|
|
|
632 |
|
|
|
633 |
^ self subclassResponsibility
|
|
|
634 |
!
|
|
|
635 |
|
|
26
|
636 |
displayRectangleX:x y:y width:w height:h
|
|
0
|
637 |
"draw a rectangle
|
|
|
638 |
- this could be recoded to draw using displayLine"
|
|
|
639 |
|
|
|
640 |
^ self subclassResponsibility
|
|
|
641 |
!
|
|
|
642 |
|
|
26
|
643 |
displayForm:aForm x:x y:y
|
|
0
|
644 |
"draw a form at x/y; if the form has depth 1, 1's in the form are
|
|
|
645 |
drawn in current fg, 0's are ignored.
|
|
24
|
646 |
If the form has depth ~~ 1, the result is undefined"
|
|
|
647 |
|
|
71
|
648 |
|fg bg f noColor|
|
|
24
|
649 |
|
|
71
|
650 |
fg := paint.
|
|
|
651 |
bg := bgPaint.
|
|
24
|
652 |
f := function.
|
|
0
|
653 |
|
|
71
|
654 |
f ~~ #copy ifTrue:[
|
|
|
655 |
self error:'function not supported'.
|
|
|
656 |
^ self
|
|
|
657 |
].
|
|
|
658 |
|
|
|
659 |
noColor := Color noColor.
|
|
|
660 |
"
|
|
|
661 |
stamp out fg-pixels
|
|
|
662 |
"
|
|
|
663 |
self paint:noColor on:Color allColor function:#and.
|
|
26
|
664 |
self displayOpaqueForm:aForm x:x y:y.
|
|
71
|
665 |
"
|
|
|
666 |
or-in fg-pixels
|
|
|
667 |
"
|
|
|
668 |
self paint:fg on:Color noColor function:#or.
|
|
26
|
669 |
self displayOpaqueForm:aForm x:x y:y.
|
|
71
|
670 |
self paint:fg on:fg function:f.
|
|
0
|
671 |
!
|
|
|
672 |
|
|
26
|
673 |
displayOpaqueForm:aForm x:x y:y
|
|
0
|
674 |
"draw a form at x/y; if the form has depth 1, 1's in the form are
|
|
|
675 |
drawn in current fg, 0's in current bg color.
|
|
|
676 |
If the form has depth ~~ 1, it is copied as is onto the receiver"
|
|
|
677 |
|
|
|
678 |
^ self subclassResponsibility
|
|
|
679 |
!
|
|
|
680 |
|
|
|
681 |
displayOpaqueString:aString from:index1 to:index2 x:x y:y
|
|
|
682 |
"draw part of a string with both fg and bg at x/y in current font"
|
|
|
683 |
|
|
|
684 |
^ self subclassResponsibility
|
|
|
685 |
!
|
|
|
686 |
|
|
|
687 |
displayString:aString from:index1 to:index2 x:x y:y
|
|
|
688 |
"draw part of a string with fg at x/y in current font"
|
|
|
689 |
|
|
|
690 |
^ self subclassResponsibility
|
|
|
691 |
! !
|
|
|
692 |
|
|
|
693 |
!GraphicsContext methodsFor:'drawing'!
|
|
|
694 |
|
|
|
695 |
displayOpaqueString:aString x:x y:y
|
|
|
696 |
"draw a string with both fg and bg"
|
|
|
697 |
|
|
|
698 |
self displayOpaqueString:aString from:1 to:(aString size) x:x y:y
|
|
|
699 |
!
|
|
|
700 |
|
|
|
701 |
displayOpaqueString:aString at:aPoint
|
|
|
702 |
"draw a string with both fg and bg"
|
|
|
703 |
|
|
|
704 |
self displayOpaqueString:aString x:(aPoint x) y:(aPoint y)
|
|
|
705 |
!
|
|
|
706 |
|
|
|
707 |
displayString:aString x:x y:y
|
|
|
708 |
"draw a string - drawing fg only"
|
|
|
709 |
|
|
|
710 |
self displayString:aString from:1 to:(aString size) x:x y:y
|
|
|
711 |
!
|
|
|
712 |
|
|
|
713 |
displayString:aString at:aPoint
|
|
|
714 |
"draw a string - drawing fg only"
|
|
|
715 |
|
|
|
716 |
self displayString:aString x:aPoint x y:aPoint y
|
|
|
717 |
!
|
|
|
718 |
|
|
24
|
719 |
displayPointX:x y:y
|
|
0
|
720 |
"draw a point at x/y"
|
|
|
721 |
|
|
|
722 |
self displayLineFromX:x y:y toX:x y:y
|
|
|
723 |
!
|
|
|
724 |
|
|
24
|
725 |
displayPoint:aPoint
|
|
0
|
726 |
"draw a pixel"
|
|
|
727 |
|
|
24
|
728 |
self displayPointX:(aPoint x) y:(aPoint y)
|
|
0
|
729 |
!
|
|
|
730 |
|
|
|
731 |
displayLineFrom:point1 to:point2
|
|
|
732 |
"draw a line"
|
|
|
733 |
|
|
|
734 |
self displayLineFromX:(point1 x) y:(point1 y)
|
|
71
|
735 |
toX:(point2 x) y:(point2 y)
|
|
0
|
736 |
!
|
|
|
737 |
|
|
26
|
738 |
displayRectangle:aRectangle
|
|
0
|
739 |
"draw a rectangle"
|
|
|
740 |
|
|
26
|
741 |
self displayRectangleX:(aRectangle left)
|
|
71
|
742 |
y:(aRectangle top)
|
|
|
743 |
width:(aRectangle width)
|
|
|
744 |
height:(aRectangle height)
|
|
0
|
745 |
!
|
|
|
746 |
|
|
26
|
747 |
displayRectangleOrigin:origin corner:corner
|
|
0
|
748 |
"draw a rectangle"
|
|
|
749 |
|
|
|
750 |
|top left|
|
|
|
751 |
|
|
|
752 |
left := origin x.
|
|
|
753 |
top := origin y.
|
|
26
|
754 |
self displayRectangleX:left y:top
|
|
71
|
755 |
width:(corner x - left)
|
|
|
756 |
height:(corner y - top)
|
|
0
|
757 |
!
|
|
|
758 |
|
|
26
|
759 |
displayForm:aForm at:aPoint
|
|
0
|
760 |
"draw a form"
|
|
|
761 |
|
|
26
|
762 |
self displayForm:aForm x:(aPoint x) y:(aPoint y)
|
|
0
|
763 |
!
|
|
|
764 |
|
|
12
|
765 |
displayArcIn:aRectangle from:startAngle angle:angle
|
|
|
766 |
"draw an arc in a box"
|
|
0
|
767 |
|
|
12
|
768 |
self displayArcX:(aRectangle left)
|
|
71
|
769 |
y:(aRectangle top)
|
|
|
770 |
w:(aRectangle width)
|
|
|
771 |
h:(aRectangle height)
|
|
|
772 |
from:startAngle
|
|
|
773 |
angle:angle
|
|
0
|
774 |
!
|
|
|
775 |
|
|
12
|
776 |
displayArcOrigin:origin corner:corner from:startAngle angle:angle
|
|
|
777 |
"draw an arc in a box"
|
|
0
|
778 |
|
|
|
779 |
|left top right bot|
|
|
|
780 |
|
|
|
781 |
left := origin x.
|
|
|
782 |
top := origin y.
|
|
|
783 |
right := corner x.
|
|
|
784 |
bot := corner y.
|
|
12
|
785 |
self displayArcX:left y:top
|
|
71
|
786 |
w:(right - left + 1) h:(bot - top + 1)
|
|
|
787 |
from:startAngle angle:angle
|
|
0
|
788 |
!
|
|
|
789 |
|
|
12
|
790 |
displayCircleIn:aRectangle
|
|
0
|
791 |
"draw a circle in a box"
|
|
|
792 |
|
|
|
793 |
self
|
|
71
|
794 |
displayArcX:(aRectangle left)
|
|
|
795 |
y:(aRectangle top)
|
|
|
796 |
w:(aRectangle width)
|
|
|
797 |
h:(aRectangle height)
|
|
|
798 |
from:0 angle:360
|
|
0
|
799 |
!
|
|
|
800 |
|
|
12
|
801 |
displayCircle:aPoint radius:r
|
|
|
802 |
"draw a circle around a center point"
|
|
0
|
803 |
|
|
12
|
804 |
self displayCircleX:(aPoint x) y:(aPoint y) radius:r
|
|
0
|
805 |
!
|
|
|
806 |
|
|
12
|
807 |
displayCircleX:x y:y radius:r
|
|
|
808 |
"draw a circle around a center point"
|
|
0
|
809 |
|
|
|
810 |
|d|
|
|
|
811 |
d := 2 * r.
|
|
12
|
812 |
self displayArcX:(x - r) y:(y - r)
|
|
71
|
813 |
w:d h:d
|
|
|
814 |
from:0 angle:360
|
|
0
|
815 |
! !
|