"

 COPYRIGHT (c) 1995 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.

"

'From Smalltalk/X, Version:2.10.5 on 25-mar-1995 at 12:12:09 pm'!

SelectionInList subclass:#MultiSelectionInList

	 instanceVariableNames:''

	 classVariableNames:''

	 poolDictionaries:''

	 category:'Interface-Support-Models'

!

!MultiSelectionInList class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1995 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.

"

!

version

    ^ '$Header'

!

documentation

"

    Like a selectionInList, but allows for multiple selected items.

    For use as a model for SelectionInListViews, with multipleSelectOk set to true.

"

! !

!MultiSelectionInList methodsFor:'initialization'!

initialize

    self listHolder:(nil asValue).      "/ could also use an empty collection here

    self selectionIndexHolder:(#() asValue).

    "Created: 26.10.1995 / 16:30:22 / cg"

! !

!MultiSelectionInList methodsFor:'accessing-values'!

selection:anObjectList 

    "set the selection to be anObjectList."

    |l indizes|

    l := self list.

    indizes := OrderedCollection new.

    anObjectList do:[:o |

	|idx|

	idx := l indexOf:o ifAbsent:0.

	idx ~~ 0 ifTrue:[

	    indizes add:idx

	].

    ].

    ^ self selectionIndex:indizes

    "Created: 26.10.1995 / 16:40:24 / cg"

!

selection

    "return the selections value (i.e. the entry in the list"

    |l|

    l := self list.

    ^ selectionIndexHolder value collect:[:index |

	l at:index

      ]

    "Created: 26.10.1995 / 16:52:27 / cg"

! !

!MultiSelectionInList methodsFor:'selections'!

selections

    |selectionIndices|

    selectionIndices := selectionIndexHolder value.

    (selectionIndices isNil 

    or:[selectionIndices isEmpty]) ifFalse:[

	^ selectionIndices collect:[:index | listHolder value at:index]

    ].

    ^ #()

! !