001 // Copyright 2004, 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.contrib.tree.simple; 016 017 import java.io.Serializable; 018 import java.util.HashSet; 019 import java.util.Set; 020 021 import org.apache.tapestry.contrib.tree.model.ITreeStateModel; 022 023 /** 024 * @author ceco 025 */ 026 public class SimpleTreeStateModel implements ITreeStateModel, Serializable 027 { 028 private static final long serialVersionUID = 9206852255511734400L; 029 030 private Set m_setExpanded; 031 private Object m_objSelectedNodeUID = null; 032 033 /** 034 * Constructor for SimpleTreeStateModel. 035 */ 036 public SimpleTreeStateModel() { 037 super(); 038 initialize(); 039 } 040 private void initialize(){ 041 m_setExpanded = new HashSet(); 042 m_objSelectedNodeUID = null; 043 } 044 045 /** 046 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#getExpandSelection() 047 */ 048 public Set getExpandSelection() { 049 return m_setExpanded; 050 } 051 052 /** 053 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#expand(Object) 054 */ 055 public void expand(Object objUniqueKey) { 056 m_setExpanded.add(objUniqueKey); 057 //setSelectedNode(objUniqueKey); 058 } 059 060 /** 061 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#expandPath(Object) 062 */ 063 public void expandPath(Object objUniqueKey) { 064 m_setExpanded.add(objUniqueKey); 065 //setSelectedNode(objUniqueKey); 066 } 067 068 /** 069 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#collapse(Object) 070 */ 071 public void collapse(Object objUniqueKey) { 072 m_setExpanded.remove(objUniqueKey); 073 //setSelectedNode(objUniqueKey); 074 } 075 076 /** 077 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#collapsePath(Object) 078 */ 079 public void collapsePath(Object objUniqueKey) { 080 m_setExpanded.remove(objUniqueKey); 081 //setSelectedNode(objUniqueKey); 082 } 083 084 /** 085 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#isUniqueKeyExpanded(Object) 086 */ 087 public boolean isUniqueKeyExpanded(Object objUniqueKey) { 088 return m_setExpanded.contains(objUniqueKey); 089 } 090 /** 091 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#getSelectedNode() 092 */ 093 public Object getSelectedNode() { 094 return m_objSelectedNodeUID; 095 } 096 097 public void setSelectedNode(Object objUniqueKey){ 098 if(m_objSelectedNodeUID == null || !m_objSelectedNodeUID.equals(objUniqueKey)) 099 m_objSelectedNodeUID = objUniqueKey; 100 } 101 102 /** 103 * @see org.apache.tapestry.contrib.tree.model.ITreeStateModel#resetState() 104 */ 105 public void resetState() { 106 initialize(); 107 } 108 109 }