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"
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COPYRIGHT (c) 1995 by Claus Gittinger
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93
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All Rights Reserved
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88
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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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LayoutOrigin subclass:#LayoutFrame
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instanceVariableNames:'rightFraction bottomFraction rightOffset bottomOffset'
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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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!LayoutFrame 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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93
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All Rights Reserved
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88
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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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documentation
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"
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This class is provided to make porting of existing ST-80 applications
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easier. Instances can be used to control the geometry of a subview, within
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its superview. Like a layoutOrigin, it controls the origin of a component
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by given fraction and offset dimensions; in addition, the bottom-right
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corner is also controlled by corresponding values. Therefore, the components
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preferredExtent is ignored.
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See also:
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LayoutOrigin AlignmentOrigin Layout
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93
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Notice: this class was implemented using protocol information
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from alpha testers - it may not be complete or compatible to
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the corresponding ST-80 class. If you encounter any incompatibilities,
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please forward a note to the ST/X team.
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219
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[author:]
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Claus Gittinger
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94
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"
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93
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!
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examples
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"
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|top button|
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top := StandardSystemView new.
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top extent:300@300.
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button := Button label:'component'.
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top add:button in:(LayoutFrame new
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leftFraction:0.25;
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topFraction:0.25;
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rightFraction:0.75;
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bottomFraction:0.75).
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top open
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like above, but adds additional offset to the origin:
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|top button|
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top := StandardSystemView new.
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top extent:300@300.
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button := Button label:'component'.
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top add:button in:(LayoutFrame new
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leftFraction:0.25; leftOffset:10;
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topFraction:0.25; topOffset:-20;
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rightFraction:0.75;
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bottomFraction:0.75).
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top open
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like above, with offsets on all edges, actually simulating
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a constant inset on all four edges:
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|top button|
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top := StandardSystemView new.
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top extent:300@300.
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button := Button label:'component'.
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top add:button in:(LayoutFrame new
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leftFraction:0.0; leftOffset:10;
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topFraction:0.0; topOffset:10;
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rightFraction:1.0; rightOffset:-10;
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bottomFraction:1.0; bottomOffset:-10).
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top open
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"
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! !
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!LayoutFrame methodsFor:'accessing'!
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bottomFraction
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"return bottomFraction"
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^ bottomFraction
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!
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bottomFraction:something
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"set bottomFraction"
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bottomFraction := something.
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!
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bottomFraction:something offset:o
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"set bottomFraction and offset"
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bottomFraction := something.
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bottomOffset := o
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!
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bottomOffset
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"return bottomOffset"
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^ bottomOffset
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!
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bottomOffset:something
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"set bottomOffset"
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bottomOffset := something.
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!
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rightFraction
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"return rightFraction"
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^ rightFraction
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!
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rightFraction:something
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"set rightFraction"
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rightFraction := something.
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!
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rightFraction:something offset:o
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"set rightFraction and offset"
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rightFraction := something.
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rightOffset := o
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!
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rightOffset
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"return rightOffset"
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^ rightOffset
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!
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rightOffset:something
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"set rightOffset"
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rightOffset := something.
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! !
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!LayoutFrame methodsFor:'converting'!
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fromLiteralArrayEncoding:encoding
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"read my values from an encoding.
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The encoding is supposed to be of the form:
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(LayoutFrame orgOffsX relOrgX orgOffsY relOrgY cornOffsX relCornX cornOffsY relCornY)
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This is the reverse to literalArrayEncoding."
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leftOffset := encoding at:2.
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leftFraction := encoding at:3.
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topOffset := encoding at:4.
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topFraction := encoding at:5.
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rightOffset := encoding at:6.
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rightFraction := encoding at:7.
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bottomOffset := encoding at:8.
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bottomFraction := encoding at:9.
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"
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LayoutFrame new fromLiteralArrayEncoding:#(#LayoutFrame 70 0 2 0 0 1 25 0 )
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#(#LayoutFrame 70 0 2 0 0 1 25 0 ) decodeAsLiteralArray
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"
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!
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literalArrayEncoding
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"encode myself as an array, from which a copy of the receiver
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can be reconstructed with #decodeAsLiteralArray.
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The encoding is:
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(#LayoutOrigin orgOffsX relOrgX orgOffsY relOrgY cornOffsX relCornX cornOffsY relCornY)"
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^ super literalArrayEncoding
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, (Array
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with:rightOffset
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with:rightFraction
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with:bottomOffset
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with:bottomFraction)
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"Modified: 1.9.1995 / 02:43:35 / claus"
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"Modified: 22.4.1996 / 13:00:17 / cg"
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! !
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!LayoutFrame methodsFor:'initialization'!
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initialize
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leftOffset := rightOffset := bottomOffset := topOffset := 0.
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leftFraction := topFraction := 0.
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bottomFraction := rightFraction := 1.
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! !
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!LayoutFrame methodsFor:'printing & storing'!
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displayString
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^ (self class name) , '('
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, 'l: ' , leftFraction displayString
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, '+' , leftOffset displayString
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, ' t: ' , topFraction displayString
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, '+' , topOffset displayString
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, ' r: ' , rightFraction displayString
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, '+' , rightOffset displayString
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, ' b: ' , bottomFraction displayString
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, '+' , bottomOffset displayString
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, ')'
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! !
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!LayoutFrame methodsFor:'queries'!
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corner
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^ rightFraction asFloat @ bottomFraction asFloat
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!
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rectangleRelativeTo:superRectangle preferred:prefRect
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|x1 y1 x2 y2|
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leftOffset isNil ifTrue:[
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x1 := 0
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] ifFalse:[
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x1 := leftOffset
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].
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topOffset isNil ifTrue:[
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y1 := 0
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] ifFalse:[
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y1 := topOffset
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].
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rightOffset isNil ifTrue:[
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x2 := 0
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] ifFalse:[
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x2 := rightOffset
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].
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bottomOffset isNil ifTrue:[
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y2 := 0
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] ifFalse:[
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y2 := bottomOffset
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].
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leftFraction notNil ifTrue:[
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x1 := x1 + (superRectangle width * leftFraction)
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].
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topFraction notNil ifTrue:[
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y1 := y1 + (superRectangle height * topFraction)
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].
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rightFraction notNil ifTrue:[
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x2 := x2 + (superRectangle width * rightFraction)
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].
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bottomFraction notNil ifTrue:[
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y2 := y2 + (superRectangle height * bottomFraction)
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].
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^ Rectangle origin:x1@y1 corner:x2@y2
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"
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|superRect lF|
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superRect := 0@0 corner:100@100.
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lF := (LayoutFrame new).
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lF leftFraction:0.25;
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topFraction:0.25;
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rightFraction:0.75;
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bottomFraction:0.75.
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lF rectangleRelativeTo:superRect preferred:(0@0 corner:30@30)
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"
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! !
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!LayoutFrame class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libview2/LayoutFrame.st,v 1.12 1996-04-25 16:20:26 cg Exp $'
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! !
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