1 /* 2 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.ui.treetable; 26 27 import javax.swing.tree.*; 28 import javax.swing.event.*; 29 30 /** 31 * An abstract implementation of the TreeTableModel interface, handling the list 32 * of listeners. 33 * @author Philip Milne 34 */ 35 36 public abstract class AbstractTreeTableModel implements TreeTableModel { 37 protected Object root; 38 protected EventListenerList listenerList = new EventListenerList(); 39 AbstractTreeTableModel(Object root)40 public AbstractTreeTableModel(Object root) { 41 this.root = root; 42 } 43 44 // 45 // Default implmentations for methods in the TreeModel interface. 46 // 47 getRoot()48 public Object getRoot() { 49 return root; 50 } 51 isLeaf(Object node)52 public boolean isLeaf(Object node) { 53 return getChildCount(node) == 0; 54 } 55 valueForPathChanged(TreePath path, Object newValue)56 public void valueForPathChanged(TreePath path, Object newValue) {} 57 58 // This is not called in the JTree's default mode: use a naive implementation. getIndexOfChild(Object parent, Object child)59 public int getIndexOfChild(Object parent, Object child) { 60 for (int i = 0; i < getChildCount(parent); i++) { 61 if (getChild(parent, i).equals(child)) { 62 return i; 63 } 64 } 65 return -1; 66 } 67 addTreeModelListener(TreeModelListener l)68 public void addTreeModelListener(TreeModelListener l) { 69 listenerList.add(TreeModelListener.class, l); 70 } 71 removeTreeModelListener(TreeModelListener l)72 public void removeTreeModelListener(TreeModelListener l) { 73 listenerList.remove(TreeModelListener.class, l); 74 } 75 76 /* 77 * Notify all listeners that have registered interest for 78 * notification on this event type. The event instance 79 * is lazily created using the parameters passed into 80 * the fire method. 81 * @see EventListenerList 82 */ fireTreeNodesChanged(Object source, Object[] path, int[] childIndices, Object[] children)83 protected void fireTreeNodesChanged(Object source, Object[] path, 84 int[] childIndices, 85 Object[] children) { 86 // Guaranteed to return a non-null array 87 Object[] listeners = listenerList.getListenerList(); 88 TreeModelEvent e = null; 89 // Process the listeners last to first, notifying 90 // those that are interested in this event 91 for (int i = listeners.length-2; i>=0; i-=2) { 92 if (listeners[i]==TreeModelListener.class) { 93 // Lazily create the event: 94 if (e == null) 95 e = new TreeModelEvent(source, path, 96 childIndices, children); 97 ((TreeModelListener)listeners[i+1]).treeNodesChanged(e); 98 } 99 } 100 } 101 102 /* 103 * Notify all listeners that have registered interest for 104 * notification on this event type. The event instance 105 * is lazily created using the parameters passed into 106 * the fire method. 107 * @see EventListenerList 108 */ fireTreeNodesInserted(Object source, Object[] path, int[] childIndices, Object[] children)109 protected void fireTreeNodesInserted(Object source, Object[] path, 110 int[] childIndices, 111 Object[] children) { 112 // Guaranteed to return a non-null array 113 Object[] listeners = listenerList.getListenerList(); 114 TreeModelEvent e = null; 115 // Process the listeners last to first, notifying 116 // those that are interested in this event 117 for (int i = listeners.length-2; i>=0; i-=2) { 118 if (listeners[i]==TreeModelListener.class) { 119 // Lazily create the event: 120 if (e == null) 121 e = new TreeModelEvent(source, path, 122 childIndices, children); 123 ((TreeModelListener)listeners[i+1]).treeNodesInserted(e); 124 } 125 } 126 } 127 128 /* 129 * Notify all listeners that have registered interest for 130 * notification on this event type. The event instance 131 * is lazily created using the parameters passed into 132 * the fire method. 133 * @see EventListenerList 134 */ fireTreeNodesRemoved(Object source, Object[] path, int[] childIndices, Object[] children)135 protected void fireTreeNodesRemoved(Object source, Object[] path, 136 int[] childIndices, 137 Object[] children) { 138 // Guaranteed to return a non-null array 139 Object[] listeners = listenerList.getListenerList(); 140 TreeModelEvent e = null; 141 // Process the listeners last to first, notifying 142 // those that are interested in this event 143 for (int i = listeners.length-2; i>=0; i-=2) { 144 if (listeners[i]==TreeModelListener.class) { 145 // Lazily create the event: 146 if (e == null) 147 e = new TreeModelEvent(source, path, 148 childIndices, children); 149 ((TreeModelListener)listeners[i+1]).treeNodesRemoved(e); 150 } 151 } 152 } 153 154 /* 155 * Notify all listeners that have registered interest for 156 * notification on this event type. The event instance 157 * is lazily created using the parameters passed into 158 * the fire method. 159 * @see EventListenerList 160 */ fireTreeStructureChanged(Object source, Object[] path, int[] childIndices, Object[] children)161 protected void fireTreeStructureChanged(Object source, Object[] path, 162 int[] childIndices, 163 Object[] children) { 164 // Guaranteed to return a non-null array 165 Object[] listeners = listenerList.getListenerList(); 166 TreeModelEvent e = null; 167 // Process the listeners last to first, notifying 168 // those that are interested in this event 169 for (int i = listeners.length-2; i>=0; i-=2) { 170 if (listeners[i]==TreeModelListener.class) { 171 // Lazily create the event: 172 if (e == null) 173 e = new TreeModelEvent(source, path, 174 childIndices, children); 175 ((TreeModelListener)listeners[i+1]).treeStructureChanged(e); 176 } 177 } 178 } 179 180 // 181 // Default impelmentations for methods in the TreeTableModel interface. 182 // 183 getColumnClass(int column)184 public Class getColumnClass(int column) { return Object.class; } 185 186 /** By default, make the column with the Tree in it the only editable one. 187 * Making this column editable causes the JTable to forward mouse 188 * and keyboard events in the Tree column to the underlying JTree. 189 */ isCellEditable(Object node, int column)190 public boolean isCellEditable(Object node, int column) { 191 return getColumnClass(column) == TreeTableModel.class; 192 } 193 setValueAt(Object aValue, Object node, int column)194 public void setValueAt(Object aValue, Object node, int column) {} 195 196 197 // Left to be implemented in the subclass: 198 199 /* 200 * public Object getChild(Object parent, int index) 201 * public int getChildCount(Object parent) 202 * public int getColumnCount() 203 * public String getColumnName(Object node, int column) 204 * public Object getValueAt(Object node, int column) 205 */ 206 } 207