--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ValueHolderWithRememberedPreviousValue.st	Mon Jan 13 14:06:58 2014 +0100
@@ -0,0 +1,64 @@
+"
+ COPYRIGHT (c) 2014 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:libview2' }"
+
+ValueHolder subclass:#ValueHolderWithRememberedPreviousValue
+	instanceVariableNames:'previousValue'
+	classVariableNames:''
+	poolDictionaries:''
+	category:'Interface-Support-Models'
+!
+
+!ValueHolderWithRememberedPreviousValue class methodsFor:'documentation'!
+
+copyright
+"
+ COPYRIGHT (c) 2014 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
+"
+    I implement a valueHolder which remembers the previous value whenever changed.
+
+    [author:]
+        Claus Gittinger
+"
+! !
+
+!ValueHolderWithRememberedPreviousValue methodsFor:'accessing'!
+
+setValue:anObject
+    "set my value without notification."
+
+    previousValue := value.
+    value := anObject.
+! !
+
+!ValueHolderWithRememberedPreviousValue class methodsFor:'documentation'!
+
+version
+    ^ '$Header: /cvs/stx/stx/libview2/ValueHolderWithRememberedPreviousValue.st,v 1.1 2014-01-13 13:06:58 cg Exp $'
+!
+
+version_CVS
+    ^ '$Header: /cvs/stx/stx/libview2/ValueHolderWithRememberedPreviousValue.st,v 1.1 2014-01-13 13:06:58 cg Exp $'
+! !
+