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"
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COPYRIGHT (c) 1997 by eXept Software AG
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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:#ResourceRetriever
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instanceVariableNames:'className resourceOwner selector labelText'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-UIPainter'
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!
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!ResourceRetriever class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1997 by eXept Software AG
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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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!
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documentation
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"
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This class is used to retrieve resources for a painted interface of
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some sort. If the className is specified, then the owner of the resource
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is fixed at painting time. If not, then the ApplicationModel which invokes
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the painted interface is assumed to be the owner of the resource.
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When the retriever is sent the message #value, it sends the message #valueFor:
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to the resource owner, to retrive the resource
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[author:]
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Claus Atzkern
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[see also:]
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Application
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Menu
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MenuItem
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"
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! !
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!ResourceRetriever methodsFor:'accessing'!
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className
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"return the value of the instance variable 'className' (automatically generated)"
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^ className!
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className:something
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"set the class which provides the resources
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"
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className := something.
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resourceOwner := nil.
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!
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selector
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"return the value of the instance variable 'selector' (automatically generated)"
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^ selector!
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selector:something
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"set the value of the instance variable 'selector' (automatically generated)"
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selector := something.
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!
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value
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"returns value assigned to resource or nil
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"
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|resource|
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(resource := self resource) isNil ifTrue:[
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^ labelText
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].
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(labelText notNil and:[resource isImage]) ifTrue:[
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^ LabelAndIcon icon:resource string:(Text string:labelText emphasis:#bold)
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].
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^ resource
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! !
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!ResourceRetriever methodsFor:'accessing resource'!
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findGuiResourcesIn:aResourceContainer
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"setup a resource owner
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"
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className isNil ifTrue:[
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resourceOwner := aResourceContainer
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].
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!
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resource
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"returns form assigned to resource or nil
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"
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selector isNil ifTrue:[
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^nil
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].
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resourceOwner isNil ifTrue:[
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( className isNil
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or:[(resourceOwner := Smalltalk at:className ifAbsent:nil) isNil]
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) ifTrue:[
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^ nil
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]
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].
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^ resourceOwner visualFor:selector.
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! !
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!ResourceRetriever methodsFor:'converting'!
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fromLiteralArrayEncoding:anArray
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"read my values from an encoding.
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"
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className := anArray at: 2.
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selector := anArray at: 3.
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anArray size == 4 ifTrue:[
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labelText := anArray at:4
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].
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resourceOwner := nil.
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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 can be
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reconstructed with #decodeAsLiteralArray.
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The encoding is:
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(#ResourceRetriever className selector)
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or if labelText not nil:
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(#ResourceRetriever className selector labelText)
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"
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labelText isNil ifTrue:[
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^ Array with:(self class name) with:className with:selector
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] ifFalse:[
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^ Array with:(self class name) with:className with:selector with:labelText
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].
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! !
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!ResourceRetriever methodsFor:'testing'!
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isDefined
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"returns true if resource exists
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"
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selector notNil ifTrue:[
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^ (resourceOwner notNil or:[className notNil])
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].
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^ false
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!
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notDefined
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"returns false if resource is not defined
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"
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self isDefined ifTrue:[^ false ]
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ifFalse:[^ true ]
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! !
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!ResourceRetriever class methodsFor:'documentation'!
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version
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^ '$Header$'
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! !
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