| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry.contrib.tree.simple; |
| |
| import java.io.Serializable; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.tapestry.contrib.tree.model.ITreeStateModel; |
| |
| /** |
| * @author ceco |
| * @version $Id$ |
| */ |
| public class SimpleTreeStateModel implements ITreeStateModel, Serializable{ |
| |
| private Set m_setExpanded; |
| private Object m_objSelectedNodeUID = null; |
| |
| /** |
| * Constructor for SimpleTreeStateModel. |
| */ |
| public SimpleTreeStateModel() { |
| super(); |
| initialize(); |
| } |
| private void initialize(){ |
| m_setExpanded = new HashSet(); |
| m_objSelectedNodeUID = null; |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#getExpandSelection() |
| */ |
| public Set getExpandSelection() { |
| return m_setExpanded; |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#expand(Object) |
| */ |
| public void expand(Object objUniqueKey) { |
| m_setExpanded.add(objUniqueKey); |
| setSelectedNode(objUniqueKey); |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#expandPath(Object) |
| */ |
| public void expandPath(Object objUniqueKey) { |
| m_setExpanded.add(objUniqueKey); |
| setSelectedNode(objUniqueKey); |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#collapse(Object) |
| */ |
| public void collapse(Object objUniqueKey) { |
| m_setExpanded.remove(objUniqueKey); |
| setSelectedNode(objUniqueKey); |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#collapsePath(Object) |
| */ |
| public void collapsePath(Object objUniqueKey) { |
| m_setExpanded.remove(objUniqueKey); |
| setSelectedNode(objUniqueKey); |
| } |
| |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#isUniqueKeyExpanded(Object) |
| */ |
| public boolean isUniqueKeyExpanded(Object objUniqueKey) { |
| return m_setExpanded.contains(objUniqueKey); |
| } |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#getSelectedNode() |
| */ |
| public Object getSelectedNode() { |
| return m_objSelectedNodeUID; |
| } |
| private void setSelectedNode(Object objUniqueKey){ |
| if(m_objSelectedNodeUID == null || !m_objSelectedNodeUID.equals(objUniqueKey)) |
| m_objSelectedNodeUID = objUniqueKey; |
| } |
| /** |
| * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#resetState() |
| */ |
| public void resetState() { |
| initialize(); |
| } |
| |
| } |