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'From Smalltalk/X, Version:2.10.5 on 15-apr-1995 at 12:14:46 pm'!
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Layout subclass:#LayoutOrigin
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instanceVariableNames:'leftFraction topFraction leftOffset
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topOffset'
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Support-ST80 compatibility'
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!
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!LayoutOrigin class methodsFor:'instance creation'!
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fractionalFromPoint:aPoint
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^ self new leftFraction:aPointx topFraction:aPoint y
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!
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offsetFromPoint:aPoint
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^ self new leftOffset:aPointx topOffset:aPoint y
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!
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fromPoint:aPoint
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"return a new LayoutOrigin from aPoint.
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If the coordinates are between 0 and 1, take
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them as fractional parts (relative to superview).
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Otherwise, treat them as absolute offsets."
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|x y layout|
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x := aPoint x.
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y := aPoint y.
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layout := self new.
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((x between:0 and:1)
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and:[y between:0 and:1]) ifTrue:[
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layout leftFraction:x topFraction:y
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] ifFalse:[
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layout leftOffset:x topOffset:y
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].
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^ layout
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! !
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!LayoutOrigin methodsFor:'accessing'!
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leftFraction:something
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"set leftFraction"
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leftFraction := something.
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!
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leftFraction
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"return leftFraction"
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^ leftFraction
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!
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leftOffset:something
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"set leftOffset"
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leftOffset := something.
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!
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leftOffset
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"return leftOffset"
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^ leftOffset
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!
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leftFraction:something offset:o
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"set leftFraction and offset"
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leftFraction := something.
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leftOffset := o
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!
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topFraction:something
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"set topFraction"
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topFraction := something.
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!
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topFraction
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"return topFraction"
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^ topFraction
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!
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topOffset:something
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"set topOffset"
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topOffset := something.
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!
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topOffset
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"return topOffset"
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^ topOffset
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!
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topFraction:something offset:o
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"set topFraction and offset"
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topFraction := something.
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topOffset := o
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! !
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!LayoutOrigin methodsFor:'queries'!
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rectangleRelativeTo:superRectangle preferred:prefRect
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|x y|
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leftOffset isNil ifTrue:[
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x := 0
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] ifFalse:[
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x := leftOffset
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].
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topOffset isNil ifTrue:[
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y := 0
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] ifFalse:[
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y := topOffset
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].
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leftFraction notNil ifTrue:[
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x := x + (prefRect width * leftFraction)
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].
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topFraction notNil ifTrue:[
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y := y + (prefRect height * topFraction)
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].
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^ Rectangle origin:x@y extent:prefRect extent
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!
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origin
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^ leftFraction asFloat @ topFraction asFloat
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! !
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!LayoutOrigin methodsFor:'initialization'!
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initialize
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leftOffset := topOffset := 0.
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leftFraction := topFraction := 0.
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! !
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