author | Stefan Vogel <sv@exept.de> |
Wed, 01 Feb 2017 15:10:20 +0100 | |
changeset 3859 | fd0b1cf871f2 |
parent 2745 | c46c41c89a78 |
child 3855 | 1db7742d33ad |
permissions | -rw-r--r-- |
2415 | 1 |
"{ Package: 'stx:libview2' }" |
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ProtocolAdaptor subclass:#DictionaryAdaptor |
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instanceVariableNames:'myAspect' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Interface-Support-Models' |
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! |
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!DictionaryAdaptor class methodsFor:'documentation'! |
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documentation |
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" |
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Similar to AspectAdaptor, but accesses a Dictionary instead of |
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a classes instance variables. |
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[author:] |
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Stefan Vogel (stefan@zwerg) |
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[instance variables:] |
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[class variables:] |
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[see also:] |
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" |
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! |
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examples |
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" |
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[exBegin] |
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|dialog dict dataModel| |
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dict := Dictionary new. |
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dict |
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at:#field1 put:'hello'; |
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at:#field2 put:'one'; |
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at:#field3 put:'two'; |
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at:#field4 put:'three'. |
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dialog := DialogBox new. |
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dialog addTextLabel:'1:'. |
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dialog addInputFieldOn:(DictionaryAdaptor new |
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subject:dict; |
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aspect:#field1). |
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dialog addTextLabel:'2:'. |
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dialog addInputFieldOn:(DictionaryAdaptor new |
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subject:dict; |
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forAspect:#field2). |
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dialog addTextLabel:'3:'. |
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dialog addInputFieldOn:(DictionaryAdaptor new |
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subject:dict; |
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aspect:#field3). |
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dialog addTextLabel:'4:'. |
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dialog addInputFieldOn:(DictionaryAdaptor new |
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subject:dict; |
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forAspect:#field4). |
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dialog addOkButton. |
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dict inspect. |
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dialog open. |
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dialog accepted ifTrue:[ |
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Transcript showCR:'data now: ' , dict printString |
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] |
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[exEnd] |
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" |
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! ! |
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!DictionaryAdaptor class methodsFor:'instance creation'! |
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forAspect:anAspect |
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"create and return a new adaptor, which forwards requests |
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to anObject, using anAspect to access a Dictionary. |
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The returned object can be used in place of a ValueHolder" |
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^ self new forAspect:anAspect |
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! |
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subject:anObject sendsUpdates:aBoolean aspect:aspect |
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"create and return a new adaptor, which forwards requests |
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to anObject, using #at:aspect and #at:aspect put: for access. |
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The returned object can be used in place of a ValueHolder" |
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^ (self subject:anObject sendsUpdates:aBoolean) aspect:aspect |
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! ! |
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!DictionaryAdaptor methodsFor:'accessing-spec'! |
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aspect:aSelector |
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"set the adapters change aspect - this is the aspect of the update message, |
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on which the adaptor reacts" |
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myAspect := aSelector. |
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! |
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forAspect |
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"get the adapters aspect" |
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^ myAspect |
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! |
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forAspect:aSelector |
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"set the adapters aspect" |
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myAspect := aSelector. |
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! ! |
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!DictionaryAdaptor methodsFor:'accessing-value'! |
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setValue:newValue |
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"set the value - this forwards a putMessage to the target" |
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|target oldValue| |
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target := self subjectValue. |
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target isNil ifTrue:[^ nil]. |
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oldValue := target at:myAspect. |
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oldValue ~~ newValue ifTrue:[ |
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target at:myAspect put:newValue. |
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] |
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! |
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value |
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"translate a query for my value from my user |
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into an aspect access towards my subject" |
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|target| |
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target := self subjectValue. |
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target isNil ifTrue:[^ nil]. |
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^ target at:myAspect ifAbsent:[]. |
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! |
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value:newValue |
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"set the value - this changes the target with #at:put: |
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and sends out a changeNotification if the value did really change." |
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|target oldValue| |
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target := self subjectValue. |
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2745
c46c41c89a78
without target, should return self - not nil
Claus Gittinger <cg@exept.de>
parents:
2415
diff
changeset
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target isNil ifTrue:[^ self]. |
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oldValue := target at:myAspect ifAbsent:[]. |
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oldValue ~~ newValue ifTrue:[ |
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target at:myAspect put:newValue. |
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subjectSendsUpdates ifFalse:[ |
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self changed:#value |
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] |
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] |
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! ! |
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!DictionaryAdaptor methodsFor:'change & update'! |
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update:something with:aParameter from:changedObject |
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"translate an update from the model into a #value-change |
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via my depenedents ..." |
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((changedObject == subject and:[something == myAspect]) |
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or:[changedObject == subjectChannel]) ifTrue:[ |
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self changed:#value |
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]. |
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! ! |
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!DictionaryAdaptor class methodsFor:'documentation'! |
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version |
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2745
c46c41c89a78
without target, should return self - not nil
Claus Gittinger <cg@exept.de>
parents:
2415
diff
changeset
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^ '$Header: /cvs/stx/stx/libview2/DictionaryAdaptor.st,v 1.2 2009-09-18 16:14:09 cg Exp $' |
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! ! |