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8778
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"{ Package: 'cvut:stx/goodies/libtool3' }"
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"{ NameSpace: Tools }"
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Object subclass:#NavigationHistory
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instanceVariableNames:'items position'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-History'
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!
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!NavigationHistory class methodsFor:'instance creation'!
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new
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^ self basicNew initialize.
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"Created: / 21-02-2008 / 15:26:05 / janfrog"
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! !
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!NavigationHistory methodsFor:'accessing'!
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currentItem
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^(position between:1 and: items size)
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ifTrue:[items at: position]
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ifFalse:[nil]
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"Created: / 27-02-2008 / 08:46:37 / janfrog"
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!
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currentItem: anObject
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self goTo: anObject
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"Created: / 27-02-2008 / 08:47:04 / janfrog"
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!
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goBackItems
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^ (items copyTo:position - 1) reverse
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"Created: / 27-02-2008 / 11:52:12 / janfrog"
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!
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goForwardItems
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^ items copyFrom:position + 1
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"Created: / 27-02-2008 / 11:52:26 / janfrog"
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! !
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!NavigationHistory methodsFor:'initialization'!
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initialize
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"Invoked when a new instance is created."
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"/ please change as required (and remove this comment)
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"/ items := nil.
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"/ position := nil.
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"/ super initialize. -- commented since inherited method does nothing
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items := OrderedCollection new.
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position := 0
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"Created: / 21-02-2008 / 15:26:05 / janfrog"
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! !
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!NavigationHistory methodsFor:'menu & menu actions'!
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goBackMenu
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|menu|
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menu := Menu new.
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self goBackItems do:[:item |
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menu addItem:(MenuItem label:item displayString value:[ self goTo:item ])
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].
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^ menu
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"Created: / 22-02-2008 / 16:57:46 / janfrog"
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"Modified: / 27-02-2008 / 11:52:12 / janfrog"
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!
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goForwardMenu
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|menu|
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menu := Menu new.
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self goForwardItems do:[:item |
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menu addItem:(MenuItem label:item displayString value:[ self goTo:item ])
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].
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^ menu
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"Created: / 22-02-2008 / 16:58:11 / janfrog"
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"Modified: / 27-02-2008 / 11:52:26 / janfrog"
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! !
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!NavigationHistory methodsFor:'navigation'!
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goBack
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| value |
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position := (position - 1) max: 1.
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self changed: #currentItem with: (value := self currentItem).
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^value
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"Created: / 21-02-2008 / 16:37:37 / janfrog"
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"Modified: / 27-02-2008 / 08:48:14 / janfrog"
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!
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goForward
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| value |
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position := (position + 1) min: items size.
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self changed: #currentItem with: (value := self currentItem).
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^value
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"Created: / 21-02-2008 / 16:37:37 / janfrog"
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"Modified: / 27-02-2008 / 08:48:24 / janfrog"
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!
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goTo: navigationHistoryItem
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| idx |
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idx := items indexOf:navigationHistoryItem.
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idx isZero
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ifFalse:
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[position := idx]
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ifTrue:
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[position < items size ifTrue:
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[items removeFromIndex: position + 1 toIndex: items size].
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items addLast: navigationHistoryItem.
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position := position + 1].
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self changed: #value with: navigationHistoryItem.
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^navigationHistoryItem
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"Created: / 21-02-2008 / 16:40:39 / janfrog"
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"Modified: / 21-02-2008 / 19:12:35 / janfrog"
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! !
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!NavigationHistory methodsFor:'queries'!
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canGoBack
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^position > 1
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"Created: / 21-02-2008 / 16:40:48 / janfrog"
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!
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canGoForward
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^position < items size
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"Created: / 21-02-2008 / 16:40:48 / janfrog"
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! !
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!NavigationHistory class methodsFor:'documentation'!
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version
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8804
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^ '$Header: /cvs/stx/stx/libtool/Tools__NavigationHistory.st,v 1.2 2009-09-29 15:11:46 fm Exp $'
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!
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version_CVS
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^ '$Header: /cvs/stx/stx/libtool/Tools__NavigationHistory.st,v 1.2 2009-09-29 15:11:46 fm Exp $'
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!
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version_SVN
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^ 'Header: /opt/data/cvs/stx/goodies/libtool3/Tools__NavigationHistory.st,v 1.2 2008-02-27 13:45:21 vranyj1 Exp '
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8778
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! !
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