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ScrollableView subclass:#SubCanvas
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503
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instanceVariableNames:'builder spec client clientHolder specHolder'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Basic'
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!
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!SubCanvas methodsFor:'accessing'!
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builder
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"return the value of the instance variable 'builder' (automatically generated)"
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^ builder!
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client
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"return the value of the instance variable 'client' (automatically generated)"
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^ client!
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client:anApplicationModel
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"release existing components and generate new components from
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the applications windowSpec."
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^ self client:anApplicationModel spec:#windowSpec
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!
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client:anApplication spec:aWindowSpecOrSelector
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"release existing components and generate new components from
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the applications windowSpec."
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|aBuilder|
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(anApplication notNil and:[anApplication respondsTo:#builder]) ifTrue:[
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aBuilder := anApplication builder
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] ifFalse:[
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aBuilder := UIBuilder new
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].
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^ self client:anApplication spec:aWindowSpecOrSelector builder:aBuilder
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!
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client:anApplication spec:aWindowSpecOrSpecSymbol builder:aBuilder
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"release existing components and generate new components from
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the given windowSpec, using the given builder."
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builder := aBuilder.
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spec := aWindowSpecOrSpecSymbol.
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"/ check for master application
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(anApplication notNil and:[anApplication masterApplication isNil]) ifTrue:[
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client := nil.
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client := self application.
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client ~~ anApplication ifTrue:[
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anApplication masterApplication:client
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]
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].
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client := anApplication.
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self rebuild.
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^ builder
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!
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spec
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"return the value of the instance variable 'spec' (automatically generated)"
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^ spec!
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spec:something
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"set the value of the instance variable 'spec' (automatically generated)"
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spec := something.
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self rebuild.
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819
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!
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widget
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"ST80 compatibility.
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I am my own widget"
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^ self
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"Created: / 10.3.1998 / 16:20:52 / stefan"
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! !
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!SubCanvas methodsFor:'accessing channels'!
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clientHolder
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^ clientHolder
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!
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clientHolder:aValueHolder
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clientHolder notNil ifTrue:[
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clientHolder removeDependent:self
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].
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(clientHolder := aValueHolder) notNil ifTrue:[
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clientHolder addDependent:self
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].
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self updateFromChannels
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!
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specHolder
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^ specHolder
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!
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specHolder:aValueHolder
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specHolder notNil ifTrue:[
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specHolder removeDependent:self
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].
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(specHolder := aValueHolder) notNil ifTrue:[
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specHolder addDependent:self
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].
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self updateFromChannels
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! !
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!SubCanvas methodsFor:'building'!
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rebuild
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"rebuild
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"
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|win|
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scrolledView notNil ifTrue:[
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scrolledView destroySubViews
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].
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spec notNil ifTrue:[
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(win := spec) isSymbol ifTrue:[
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client isNil ifTrue:[
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^ self
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].
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(win := client class interfaceSpecFor:spec) isNil ifTrue:[
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^ self
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]
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].
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builder isNil ifTrue:[
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builder := UIBuilder new
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].
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builder buildFromSpec:win in:scrolledView.
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self realized ifTrue:[
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scrolledView realizeAllSubViews
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]
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]
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!
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releaseAllComponents
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scrolledView destroySubViews.
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builder := nil.
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spec := nil.
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client := nil.
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! !
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!SubCanvas methodsFor:'change & update'!
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update:something with:aParameter from:changedObject
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"one of my models changed its value
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"
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(changedObject == clientHolder or:[changedObject == specHolder]) ifTrue:[
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self updateFromChannels
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] ifFalse:[
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super update:something with:aParameter from:changedObject.
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]
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!
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updateFromChannels
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"update canvas from channel
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"
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|client spec|
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clientHolder isNil ifTrue:[
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client := self application
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] ifFalse:[
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client := clientHolder value
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].
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557
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specHolder isNil ifTrue:[
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spec := #windowSpec
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] ifFalse:[
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spec := specHolder value
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].
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(client notNil and:[spec notNil]) ifTrue:[
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self client:client spec:spec
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] ifFalse:[
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self client:nil
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]
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503
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! !
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!SubCanvas methodsFor:'initialization'!
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609
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destroy
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clientHolder notNil ifTrue:[
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clientHolder removeDependent:self.
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clientHolder := nil.
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].
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specHolder notNil ifTrue:[
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specHolder removeDependent:self.
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specHolder := nil.
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].
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super destroy.
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!
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503
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initialize
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super initialize.
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self scrolledView:View new.
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spec := #windowSpec.
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! !
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!SubCanvas methodsFor:'queries'!
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application
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"return the application, under which this view was opened,
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"
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client notNil ifTrue:[
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^ client
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455
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].
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503
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^ super application
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455
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! !
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!SubCanvas class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libwidg2/SubCanvas.st,v 1.7 1998-03-10 17:12:02 stefan Exp $'
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! !
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