001    package org.apache.myfaces.tobago.event;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    import javax.faces.component.UIComponent;
021    import javax.faces.event.FacesEvent;
022    import javax.faces.event.FacesListener;
023    
024    public class TreeExpansionEvent extends FacesEvent {
025    
026      private static final long serialVersionUID = 422186716954088729L;
027    
028      private boolean oldExpanded;
029      private boolean newExpanded;
030    
031      public TreeExpansionEvent(UIComponent node, boolean oldExpanded, boolean newExpanded) {
032        super(node);
033        this.oldExpanded = oldExpanded;
034        this.newExpanded = newExpanded;
035      }
036    
037      public boolean isAppropriateListener(FacesListener facesListener) {
038        return facesListener instanceof TreeExpansionListener;
039      }
040    
041      public void processListener(FacesListener facesListener) {
042        if (facesListener instanceof TreeExpansionListener) {
043          if (oldExpanded && !newExpanded) {
044       //todo     ((TreeExpansionListener) facesListener).treeCollapsed(this);
045            ((TreeExpansionListener) facesListener).treeExpanded(this);
046          } else if (!oldExpanded && newExpanded) {
047            ((TreeExpansionListener) facesListener).treeExpanded(this);
048          } else {
049            // nothing to do
050          }
051        }
052      }
053    
054      public boolean isOldExpanded() {
055        return oldExpanded;
056      }
057    
058      public boolean isNewExpanded() {
059        return newExpanded;
060      }
061    
062      @Override
063      public String toString() {
064        return new StringBuilder()
065            .append(super.toString())
066            .append("expanded=")
067            .append(newExpanded)
068            .toString();
069      }
070    }