Close the first prototype of the new layout

mindplot/src/main/javascript/nlayout/ChangeEvent.js

@@ -0,0 +1,36 @@
+mindplot.nlayout.ChangeEvent = new Class({
+    initialize:function(id) {
+        $assert(!isNaN(id), "id can not be null");
+        this._id = id;
+        this._position = null;
+        this._order = null;
+    },
+
+    getId:function() {
+        return this._id;
+    },
+
+    getOrder: function() {
+        return this._order;
+    },
+
+    getPosition: function() {
+        return this._position;
+    },
+
+    setOrder: function(value) {
+        $assert(!isNaN(value), "value can not be null");
+        this._order = value;
+    },
+
+    setPosition: function(value) {
+        $assert(value, "value can not be null");
+        this._position = value;
+    },
+
+    toString: function() {
+        return "[order:" + this.getOrder() + ", position: {" + this.getPosition().x + "," + this.getPosition().y + "}]";
+    }
+});
+
+