| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| 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. |
| |
| */ |
| package org.apache.batik.gvt; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.apache.batik.gvt.event.GraphicsNodeChangeListener; |
| |
| /** |
| * The top-level graphics node of the GVT tree. |
| * |
| * @author <a href="mailto:Thierry.Kormann@sophia.inria.fr">Thierry Kormann</a> |
| * @version $Id$ |
| */ |
| public class RootGraphicsNode extends CompositeGraphicsNode { |
| |
| List treeGraphicsNodeChangeListeners = null; |
| |
| /** |
| * Constructs a new empty <code>RootGraphicsNode</code>. |
| */ |
| public RootGraphicsNode() {} |
| |
| /** |
| * Returns the root of the GVT tree or null if the node is not |
| * part of a GVT tree. |
| */ |
| public RootGraphicsNode getRoot() { |
| return this; |
| } |
| |
| public List getTreeGraphicsNodeChangeListeners() { |
| if (treeGraphicsNodeChangeListeners == null) { |
| treeGraphicsNodeChangeListeners = new LinkedList(); |
| } |
| return treeGraphicsNodeChangeListeners; |
| } |
| |
| public void addTreeGraphicsNodeChangeListener |
| (GraphicsNodeChangeListener l) { |
| getTreeGraphicsNodeChangeListeners().add(l); |
| } |
| |
| public void removeTreeGraphicsNodeChangeListener |
| (GraphicsNodeChangeListener l) { |
| getTreeGraphicsNodeChangeListeners().remove(l); |
| } |
| |
| } |