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COPYRIGHT (c) 1994 by AEG Industry Automation
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COPYRIGHT (c) 1994 by 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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SelectionInListView subclass:#SelectionInHierarchyView
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instanceVariableNames:'itemList showConnectingLines'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Text'
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!
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!SelectionInHierarchyView class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1994 by AEG Industry Automation
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COPYRIGHT (c) 1994 by 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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version
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$Header: /cvs/stx/stx/libwidg2/SelectionInHierarchyView.st,v 1.1 1995-11-01 13:43:34 cg Exp $
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"
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!
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documentation
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"
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somewhat like a SelectionInListView; but specialized for hierarchical (i.e. tree-like)
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lists and adds the functions to show/hide subtrees.
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Requires SelectionInHierarchy as model and HierarchyNode (or compatible) list entries.
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See examples.
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"
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!
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examples
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"
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shows the tree of smalltalk classes:
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|top hierarchy hierarchyV scroller|
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hierarchy := SelectionInHierarchy new.
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hierarchy root:(HierarchyNode newAsTreeFromSmalltalkClass:Object).
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hierarchy setHideToChildren:true startingAt:hierarchy root.
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top := StandardSystemView new.
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top extent:300@300.
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hierarchyV := SelectionInHierarchyView new.
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hierarchyV model: hierarchy.
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hierarchyV action:[:nr | Transcript show:'selected:'; showCr:nr].
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top add:(ScrollableView forView:hierarchyV)
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in:((0.0 @ 0.0 ) corner:( 1.0 @ 1.0)).
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top open.
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same, with nice connecting links:
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|top hierarchy hierarchyV scroller|
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hierarchy := SelectionInHierarchy new.
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hierarchy root:(HierarchyNode newAsTreeFromSmalltalkClass:Object).
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hierarchy setHideToChildren:true startingAt:hierarchy root.
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top := StandardSystemView new.
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top extent:300@300.
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hierarchyV := SelectionInHierarchyView new.
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hierarchyV showConnectingLines:true.
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hierarchyV model: hierarchy.
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hierarchyV action:[:nr | Transcript show:'selected:'; showCr:nr].
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top add:(ScrollableView forView:hierarchyV)
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in:((0.0 @ 0.0 ) corner:( 1.0 @ 1.0)).
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top open.
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"
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! !
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!SelectionInHierarchyView methodsFor:'event handling'!
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buttonPress:button x:x y:y
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|oldSelection listLineNr|
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((button == 1) or:[button == #select]) ifTrue:[
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enabled ifTrue:[
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oldSelection := selection.
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listLineNr := self visibleLineToListLine:(self visibleLineOfY:y).
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(selectConditionBlock isNil or:[selectConditionBlock value:listLineNr]) ifTrue:[
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listLineNr notNil ifTrue: [
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self selectWithoutScroll:listLineNr
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].
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((ignoreReselect not and:[selection notNil])
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or:[selection ~= oldSelection]) ifTrue:[
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"actionBlock notNil ifTrue:[actionBlock value:selection]."
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"the ST-80 way of doing things"
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model notNil ifTrue:[
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model perform:#selection: with:(selection)
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]
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].
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clickLine := listLineNr
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]
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]
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] ifFalse:[
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super buttonPress:button x:x y:y
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]
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"Modified: 10.10.94 / 17:13:38 / W.Olberding"
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"Modified: 08.11.94 / 15:38:43 / R.Sailer"!
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selection: anIndex
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"Pass the selection along to the model."
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super selection: anIndex.
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model selection: anIndex.
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"Modified: 10.10.94 / 16:13:38 / W.Olberding"!
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keyPress:key x:x y:y
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"a key was pressed - handle [-][+][*] here"
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(key == $-) ifTrue: [^ model collapse].
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(key == $+) ifTrue: [^ model expand].
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(key == $*) ifTrue: [^ model expandAll].
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(key == $.) ifTrue: [^ model collapseAll].
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super keyPress:key x:x y:y
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"Modified: 10.10.94 / 16:13:38 / W.Olberding"! !
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!SelectionInHierarchyView methodsFor:'model access'!
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model:aModel
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super model:aModel.
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self setNewList
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!
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getSelectionFromModel
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"Get the current list selection from model. "
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^ model selection
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"Modified: 10.10.94 / 16:13:39 / W.Olberding"!
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getListFromModel
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"Get list entries from model.
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Answer them as idented Text."
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| listOfNodes textList textLine treeLevels isLastOnLevel oldLevel |
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listOfNodes := model list.
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listOfNodes isNil ifTrue:[^ #()].
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showConnectingLines ifFalse:[
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textList := listOfNodes collect: [ :aNode |
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textLine := ReadWriteStream on: String new.
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aNode level timesRepeat: [
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textLine space; space.
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].
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textLine nextPutAll: aNode name.
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aNode isExpandable ifTrue: [
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textLine nextPutAll: ' ...'.
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].
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textLine contents.
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].
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] ifTrue:[
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isLastOnLevel:=Set new.
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treeLevels:=Set new.
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oldLevel:=0.
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listOfNodes reverseDo: [ :aNode |
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(treeLevels includes:(aNode level)) ifFalse:[
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isLastOnLevel add:aNode.
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treeLevels add:(aNode level).
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].
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aNode level < oldLevel ifTrue:[
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treeLevels remove:oldLevel.
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].
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oldLevel:=aNode level.
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].
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treeLevels:=Set new.
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oldLevel:=0.
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textList := listOfNodes collect: [ :aNode |
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textLine := ReadWriteStream on: String new.
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1 to:((aNode level)-1) do: [ :l |
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(treeLevels includes:l) ifTrue:[
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textLine space; nextPutAll:((Character value:25)printString); space.
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]ifFalse:[
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textLine space; space; space.
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]
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].
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treeLevels add:(aNode level).
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oldLevel:=aNode level.
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(aNode = (listOfNodes first)) ifFalse:[
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textLine space.
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(isLastOnLevel includes:aNode)ifTrue:[
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textLine nextPutAll:((Character value:14)printString).
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treeLevels remove:(aNode level).
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]ifFalse:[
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textLine nextPutAll:((Character value:21)printString).
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].
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textLine nextPutAll:((Character value:18)printString).
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].
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aNode isExpandable ifTrue: [
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textLine nextPutAll: '[+]'.
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]ifFalse:[
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aNode isCollapsable ifTrue: [
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textLine nextPutAll: '[-]'.
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]ifFalse:[textLine nextPutAll:((Character value:18)printString).].
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].
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textLine nextPutAll:' ', aNode name.
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textLine contents.
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].
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].
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^textList
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"Modified: 10.10.94 / 16:13:39 / W.Olberding"
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!
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getListAttributes
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"get list attributes (selectable, disabled ...) from model)"
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^Array new: 0.
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"Modified: 10.10.94 / 16:13:38 / W.Olberding"! !
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!SelectionInHierarchyView methodsFor:'updating'!
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update: aSymbol with:aParameter from:changedObject
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"Change my apperance according to the occurred change."
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aSymbol==#list
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ifTrue: [^self setNewList].
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aSymbol==#selection
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ifTrue: [^self selection: self getSelectionFromModel].
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aSymbol==#attributes
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ifTrue: [].
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"Modified: 10.10.94 / 16:13:38 / W.Olberding"! !
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!SelectionInHierarchyView methodsFor:'private'!
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setNewList
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"Build a completely new hierarchy list."
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self setList: (self getListFromModel).
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"/ self attributes: (self getListAttributes).
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self selection: (self getSelectionFromModel).
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"Modified: 10.10.94 / 17:13:38 / W.Olberding"
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"Modified: 08.11.94 / 15:28:03 / R.Sailer"! !
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!SelectionInHierarchyView methodsFor:'initialization'!
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initialize
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super initialize.
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showConnectingLines := true.
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self doubleClickAction:
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[:selection | model doubleClickSelection: selection ].
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"this will usualy initiate a hide/show operation"
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"Modified: 10.10.94 / 16:13:39 / W.Olberding"
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!
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showConnectingLines:aBoolean
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showConnectingLines := aBoolean
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! !
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!SelectionInHierarchyView methodsFor:'accessing'!
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selectElement:anObject
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"select the element with same printString as the argument, anObject"
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|index|
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index:= 1.
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list notNil ifTrue:[
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list do:[:each|
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((each withoutSpaces) = (anObject printString)) ifTrue:[
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self selection: index.
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^index
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].
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index:= index + 1.
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].
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].
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^index
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"Modified: 10.10.94 / 16:13:39 / W.Olberding"! !
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