"

 COPYRIGHT (c) 1994 by AEG Industry Automation

 COPYRIGHT (c) 1994 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libwidg2' }"

Object subclass:#HierarchyNode

	instanceVariableNames:'name id parent children contents disabled hide level

		childCollectionClass'

	classVariableNames:''

	poolDictionaries:''

	category:'Interface-Support'

!

!HierarchyNode class methodsFor:'documentation'!

copyright 

"

 COPYRIGHT (c) 1994 by AEG Industry Automation

 COPYRIGHT (c) 1994 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    class to build up tree like structures to represent

    file-trees, class tress etc.

    Especially suited for use with SelectionInHierarchy and

    SelectionInHierarchyView.

    See examples in SelectionInHierarchyView.

    Notce: this class (together with SelectionInHierarchy and

           SelectionInHierarchyView) has been obsoleted by

           corresponding SelectionInTree* classes.

           These provide similar (but more) functionality.

    [Author:]

        W. Olberding AEG Factory Automation

    [See also:]

        SelectionInHierarchy

        SelectionInHierarchyView

        SelectionInTree SelectionInTreeView TreeItem

"

! !

!HierarchyNode class methodsFor:'instance creation'!

new

        ^ self basicNew initialize

!

newAsTreeFromSmalltalkClass:aClass

    "create a tree of nodes with aClass and all its

    subclasses as contents."

    ^ self

        newAsTreeFromSmalltalkClass:aClass

        level:(aClass allSuperclasses size).

    "Modified: 15.4.1997 / 16:34:23 / cg"

!

newAsTreeFromSmalltalkClass:aClass level:level

    "create a tree of nodes with aClass and all its

     subclasses as contents. Set the initial level as given."

    |newInst clsName|

    aClass isNil ifTrue:[

        "/ nil subclasses requested

        clsName := 'nil'

    ] ifFalse:[

        "/ regular tree requested

        clsName := aClass name

    ].

    newInst := super new initialize.

    newInst name:clsName.

    newInst contents:aClass.

    newInst level:level.

    newInst childCollectionClass:OrderedCollection.

    aClass isNil ifTrue:[

        ((Smalltalk allClasses select:[:cls | cls superclass isNil])

            asSortedCollection:[:a :b | a name < b name])

        do:[:aSubClass |

            newInst addChild:(self newAsTreeFromSmalltalkClass:aSubClass level:level+1).

        ]

    ] ifFalse:[

        (aClass subclasses asSortedCollection:[:a :b | a name < b name])

        do:[:aSubClass |

            newInst addChild:(self newAsTreeFromSmalltalkClass:aSubClass level:level+1).

        ]

    ].

    ^newInst

    "Created: 15.4.1997 / 16:33:52 / cg"

    "Modified: 3.7.1997 / 12:25:03 / cg"

!

newWithName:aString

    "create a new node with a name"

    |newInst|

    newInst := super new initialize.

    newInst name: aString.

    ^newInst

    "Modified: 15.4.1997 / 16:32:06 / cg"

!

newWithName: aString andId: anId

    "create a new node with a name and id"

    |newInst|

    newInst := super new initialize.

    newInst name: aString.

    newInst id:   anId.

    ^newInst

    "Modified: 15.4.1997 / 16:32:22 / cg"

! !

!HierarchyNode methodsFor:'accessing'!

childCollectionClass:aCollectionClass

    "set the class of the child-collection.

     Default is Set."

     childCollectionClass := aCollectionClass.

     children := aCollectionClass withAll:children.

!

children

    "Answer my immediate children."

    ^ children

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

children:aCollectionWithElementsOfMyKind 

    "set my children"

    aCollectionWithElementsOfMyKind do:[:child | 

         child parent: self.

         child level: level + 1.

    ].

    children := aCollectionWithElementsOfMyKind.

    "Modified: 10.10.1994 / 16:13:33 / W.Olberding"

    "Modified: 15.4.1997 / 16:48:38 / cg"

!

contents

    "Answer the contents of me (e.g. a set of items)"

    ^contents

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

contents: anObject 

    "Set the contents of me to any object (e.g. a set of items)"

    ^contents:= anObject

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

disabled

    "return disabled"

    ^ disabled

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

disabled: aBool 

    "set disabled"

    disabled := aBool.

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

hide: aBoolean

   "Set hide to aBoolean"

   hide:= aBoolean

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

hideToFalseForPath

    "set the hide-flag to false"

      hide:= false.

      parent isNil ifTrue: [^self].

      parent hideToFalseForPath

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

id

    "return id"

    ^ id

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

id:something

    "set id"

    id := something.

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

level

    "answer the level in hierarchy (0=root)"

    ^level

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

level: anInteger 

    "set the level in hierarchy (0=root)"

    level := anInteger.

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

name

    "return name"

    ^ name

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

name: aString 

    "set the name that identifys me within my parent's context."

    name :=   aString.

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

ordered:aBoolean

    "set/clear the children-are-ordered flag.

     If unordered (the default), children are kept in a set;

     if ordered, they are kept in an orderedCollection."

     aBoolean ifTrue:[

        children := children asOrderedCollection

     ] ifFalse:[

        children := children asSet

     ].

!

parent:something

    "set parent"

    parent := something.

	"Modified: 10.10.94 / 16:13:33 / W.Olberding"

!

pathName

    "return a full path name to me"

    |n|

    n := self delimiterString , name.

    parent isNil ifTrue: [^ n].

    ^ parent pathName , n.

    "Modified: 10.10.1994 / 16:13:33 / W.Olberding"

    "Modified: 15.4.1997 / 16:52:02 / cg"

! !

!HierarchyNode methodsFor:'constants'!

delimiter

	"Answer the delimiter character"

	^$/

	"Modified: 10.10.94 / 16:13:35 / W.Olberding"

!

delimiterString

	"Answer the delimiter character asString"

	^self delimiter asString

	"Modified: 10.10.94 / 16:13:35 / W.Olberding"

! !

!HierarchyNode methodsFor:'copying'!

copyWithParent:aParent

    |node|

    node := self copy.

    node parent:aParent.

    node level:((aParent level) + 1).

    node children:(children collect:[:aChild| aChild copyWithParent:self]).

  ^ node

! !

!HierarchyNode methodsFor:'hierarchy operations'!

addChild:anObjectOfMyKind 

    "add anObjectOfMyKind to my children"

    anObjectOfMyKind parent: self.

    anObjectOfMyKind level: level +1.

    self children add:anObjectOfMyKind.

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:49:17 / cg"

!

addChildren: aCollectionWithElementsOfMyKind 

    "add aCollectionWithElementsOfMyKind to my children"

    aCollectionWithElementsOfMyKind do:[:child | 

         child parent: self.

         child level: level +1.

    ].

    self children addAll:aCollectionWithElementsOfMyKind.

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:49:03 / cg"

!

allChildren

    "Answer my immediate children plus all my grandchildren

      -- in hierachical order and alphabeticaly sorted by name within one level."

     | kids |

     kids := OrderedCollection new.

     self addAllChildrenTo: kids.

     ^kids.

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

allParents 

    "return all my parents (next first - root last)"

    parent isNil ifTrue:  [ ^OrderedCollection new: 0  ]

		 ifFalse: [ ^parent, parent allParents ].

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

collapse 

      "Hide my children in hierachical printouts."

	 hide := true

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

collapseAll 

    "Hide my children and all my grandchildren in hierachical printouts."

    hide := true.

    self children do: [:kid | kid collapseAll ].

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:49:34 / cg"

!

expand 

      "Show my immediate children in hierachical printouts."

	 hide := false.

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

expandAll 

    "Show my children and all grand children in hierachical printouts."

    hide := false.

    self children do: [:kid | kid expandAll ].

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:49:48 / cg"

!

parent

    "return parent"

    ^ parent

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

removeAllChildren

    "Remove all children of me from the tree, i.e. let them

     forget myself as parent."

    | kids |

    kids := self allChildren.

    kids do: [:kid | kid parent: nil ].

    children := childCollectionClass new.

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:50:01 / cg"

!

removeChild: anObjectOfMyKind 

    "remove anObjectOfMyKind from my children"

    anObjectOfMyKind parent: nil.

    children remove: anObjectOfMyKind.

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:50:23 / cg"

!

removeYourself

    "remove me and all my children"

    parent isNil ifTrue: [^nil].

    parent removeChild: self.

    "Modified: 10.10.1994 / 16:13:34 / W.Olberding"

    "Modified: 15.4.1997 / 16:52:33 / cg"

!

withAllChildren

    "Answer me, my immediate children and all my grandchildren

      -- in hierachical order and alphabeticaly sorted by name within one level."

     | kids |

     kids := OrderedCollection with: self .

     self addAllChildrenTo: kids.

     ^kids.

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

!

withAllShownChildren

    "Answer me, my immediate children and all my grandchildren which are

     currently not hidden.

      -- in hierachical order and alphabeticaly sorted by name within one level."

     | kids |

     kids := OrderedCollection with: self .

     self addAllShownChildrenTo: kids.

     ^kids.

	"Modified: 10.10.94 / 16:13:34 / W.Olberding"

! !

!HierarchyNode methodsFor:'hierarchy sequencable operations'!

addChildAndSubChildren:aHierarchyNode after:aChild

    "add aHierarchyNode to my children after an existing child or at end"

    |node index|

    node := aHierarchyNode copyWithParent:self.