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'From Smalltalk/X, Version:2.10.7 on 24-aug-1995 at 8:28:49' !
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ValueHolder subclass:#ConvertedValue
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instanceVariableNames:'conversion'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-Support-Channels'
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!
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!ConvertedValue class methodsFor:'documentation'!
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version
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"
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96
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$Header: /cvs/stx/stx/libview2/ConvertedValue.st,v 1.2 1995-08-29 17:43:25 claus Exp $
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90
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"
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!
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documentation
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"
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a ConvertedValue translates changes on input via a conversion block
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to the output. For example, if you want to have a toggle to change the
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color inputs of some other labels, use a convertedValue which translates
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true/false into colors:
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|toggle label converter|
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converter := ConvertedValue new
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conversion:[:input | input == true
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ifTrue:[Color red]
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ifFalse:[Color blue]];
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value:false.
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toggle := Toggle label:'change color'.
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toggle controller pressChannel:converter.
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label := Label label:'see me changing'.
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label foregroundChannel:converter.
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toggle open.
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label open.
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"
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!
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examples
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"
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examples to be added.
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"
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! !
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!ConvertedValue methodsFor:'accessing'!
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conversion:aBlock
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conversion := aBlock
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!
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initialValue:someValue
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self value:someValue
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!
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value:input
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^ super value:(conversion value:input)
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! !
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