--- a/flys-client/src/main/java/de/intevation/flys/client/client/event/ParameterChangeEvent.java	Wed Jul 06 13:06:04 2011 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/event/ParameterChangeEvent.java	Wed Jul 06 15:34:38 2011 +0000
@@ -10,14 +10,29 @@
  */
 public class ParameterChangeEvent {
 
+    public static enum Type {
+        FORWARD, BACK
+    }
+
+
     protected Artifact oldArtifact;
     protected Artifact newArtifact;
 
+    protected Type     type;
+
+
     public ParameterChangeEvent(Artifact old, Artifact newArt) {
-        oldArtifact = old;
-        newArtifact = newArt;
+        this(old, newArt, Type.FORWARD);
     }
 
+
+    public ParameterChangeEvent(Artifact oArt, Artifact nArt, Type type) {
+        oldArtifact = oArt;
+        newArtifact = nArt;
+        this.type   = type;
+    }
+
+
     public Artifact getOldValue() {
         return oldArtifact;
     }
@@ -25,5 +40,9 @@
     public Artifact getNewValue() {
         return newArtifact;
     }
+
+    public Type getType() {
+        return type;
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :