Use FX class for delete node events.

mindplot/src/main/javascript/util/FadeEffect.js

@@ -0,0 +1,50 @@
+/*
+ *    Copyright [2011] [wisemapping]
+ *
+ *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
+ *   It is basically the Apache License, Version 2.0 (the "License") plus the
+ *   "powered by wisemapping" text requirement on every single page;
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the license at
+ *
+ *       http://www.wisemapping.org/license
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+mindplot.util.FadeEffect = new Class({
+    Extends: Fx,
+    initialize: function(elements, isVisible) {
+        this.parent({duration:3000,frames:15,transition:'linear'});
+        this._isVisible = isVisible;
+        this._element = elements;
+
+
+        this.addEvent('complete', function() {
+            this._element.forEach(function(elem) {
+                if(elem){
+                    elem.setVisibility(isVisible);
+                 }
+            });
+        });
+
+    },
+
+    start: function(){
+      this.parent(this._isVisible ? 0 : 1, this._isVisible ? 1 : 0);
+    },
+
+    set: function(now) {
+        this._element.forEach(function(elem) {
+           if(elem){
+                elem.setOpacity(now);
+           }
+        });
+        return this;
+    }
+});
+