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"
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COPYRIGHT (c) 1997 by eXept Software AG / Claus Gittinger
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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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Model subclass:#SelectionInTree
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496
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instanceVariableNames:'root list selection showRoot'
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458
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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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!SelectionInTree class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1997 by eXept Software AG / Claus Gittinger
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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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list and selection holder for hierarchical list structures. Used
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to buildup file-trees, class tress etc.
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Especially suited for use with SelectionInTreeView.
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[See also:]
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TreeItem
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SelectionInTreeView
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[Author:]
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W. Olberding
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Claus Atzkern
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"
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! !
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!SelectionInTree methodsFor:'accessing'!
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list
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"get list oc currently shown objects
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"
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^ list
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!
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root
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"get the root node
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"
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^ root
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!
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root:aRootNode
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"set a new root and recompute list
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"
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root := aRootNode.
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self recomputeList.
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! !
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491
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!SelectionInTree methodsFor:'accessing behavior'!
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showRoot
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"list with or without root
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"
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^ showRoot
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!
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showRoot:aState
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"list with or without root
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"
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aState ~~ showRoot ifTrue:[
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showRoot := aState.
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491
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root notNil ifTrue:[
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aState ifTrue:[list addFirst:root]
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ifFalse:[list removeFirst].
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491
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self changed:#list.
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].
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].
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! !
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!SelectionInTree methodsFor:'accessing hierarchy'!
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collapse:something
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"collapse a node or collection of nodes
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"
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|invalidate|
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self each:something do:[:aNode|
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aNode isCollapsable ifTrue:[
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aNode collapse.
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invalidate := true
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]
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].
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invalidate == true ifTrue:[self recomputeList]
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!
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expand:something
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"expand a node or collection of nodes
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"
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|invalidate|
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self each:something do:[:aNode|
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aNode isExpandable ifTrue:[
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aNode expand.
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invalidate := true
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]
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].
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invalidate == true ifTrue:[self recomputeList]
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! !
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!SelectionInTree methodsFor:'adding & removing'!
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add:something after:aChild
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"add a node or collection of nodes to parent after a child
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"
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"add a node or collection of nodes to after a child
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"
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aChild notNil ifTrue:[
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aChild parent add:something after:aChild.
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self recomputeList
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]
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!
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add:something afterIndex:anIndex below:aParent
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"add a node or collection of nodes to parent after an index
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"
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aParent add:something afterIndex:anIndex.
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self recomputeList
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!
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add:something before:aChild
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"add a node or collection of nodes to before a child
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"
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aChild notNil ifTrue:[
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aChild parent add:something before:aChild.
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self recomputeList
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]
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!
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add:something beforeIndex:anIndex below:aParent
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"add a node or collection of nodes to parent before an index
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"
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aParent add:something beforeIndex:anIndex.
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self recomputeList
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!
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add:something below:aParent
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"add a node or collection of nodes to parent
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"
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aParent add:something.
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self recomputeList
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!
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remove:something
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"remove a node or collection of nodes
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"
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|invalidate|
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self each:something do:[:aNode|
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aNode parent notNil ifTrue:[
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aNode parent remove:aNode.
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invalidate := true
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]
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].
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invalidate == true ifTrue:[self recomputeList].
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^ something
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!
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removeIndex:something
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"remove a node at index or collection of indexed nodes
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"
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|invalidate node|
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something isCollection ifFalse:[
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(something isNil or:[something == 0]) ifFalse:[
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^ self remove:(list at:something)
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].
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^ nil
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].
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(SortedCollection withAll:something) reverseDo:[:anIndex|
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node := list at:anIndex.
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node parent notNil ifTrue:[
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node parent remove:node.
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invalidate := true
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]
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].
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invalidate == true ifTrue:[self recomputeList].
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!
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removeSelection
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"remove selected nodes
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"
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self removeIndex:(self selectionIndex).
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self selectionIndex:nil
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! !
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!SelectionInTree methodsFor:'enumerating'!
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each:something do:aBlock
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"evaluate a block for something or in case of a collection for each
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element in the collection
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"
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something notNil ifTrue:[
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something isCollection ifTrue:[something do:[:el|aBlock value:el]]
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ifFalse:[aBlock value:something]
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]
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! !
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496
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!SelectionInTree methodsFor:'initialization'!
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initialize
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super initialize.
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showRoot := true.
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! !
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!SelectionInTree methodsFor:'private'!
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recomputeList
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"Travers the tree and build a new list."
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self updateList.
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self changed:#list.
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!
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updateList
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"Travers the tree and build a new list.; no notification raised"
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list := OrderedCollection new.
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root notNil ifTrue:[
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showRoot ifTrue:[
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list add:root
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].
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root recomputeList:list
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].
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! !
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!SelectionInTree methodsFor:'selection'!
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selection
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"get the selection or nil
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"
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^ self selectionIndex
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!
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selection:indexesOrNil
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"set the selection
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"
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self selectionIndex:indexesOrNil
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!
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selectionIndex
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"get the selection or nil
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"
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^ selection
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!
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selectionIndex:indexesOrNil
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"set the selection
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"
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|oldSel|
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oldSel := selection.
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self setSelectionIndex:indexesOrNil.
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oldSel = selection ifFalse:[
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self changed:#selection
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]
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!
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setSelection:indexesOrNil
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"set the selection without raising a notification
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"
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self setSelectionIndex:indexesOrNil
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!
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setSelectionIndex:indexesOrNil
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"set the selection without raising a notification
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"
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|indexes|
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indexes := indexesOrNil.
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indexes size == 0 ifTrue:[
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(indexes isCollection or:[indexes == 0]) ifTrue:[
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indexes := nil
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]
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].
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selection := indexes
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! !
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!SelectionInTree class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libwidg2/SelectionInTree.st,v 1.4 1997-08-15 09:26:23 ca Exp $'
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! !
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