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comparison org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/observable/tree/AbstractObservableTree.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
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children 383ce7bd736b
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76:f05e6e8b2f2d 78:0a55d2d5a946
1 /*******************************************************************************
2 * Copyright (c) 2006, 2007 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Brad Reynolds - bug 164134
11 *******************************************************************************/
12
13 module org.eclipse.core.internal.databinding.observable.tree.AbstractObservableTree;
14
15 import java.lang.all;
16
17 import org.eclipse.core.databinding.observable.AbstractObservable;
18 import org.eclipse.core.databinding.observable.Realm;
19 import org.eclipse.core.databinding.util.Policy;
20 import org.eclipse.core.internal.databinding.BindingMessages;
21 import org.eclipse.core.runtime.IStatus;
22 import org.eclipse.core.runtime.ListenerList;
23 import org.eclipse.core.runtime.Status;
24
25 /**
26 * @since 3.3
27 *
28 */
29 public abstract class AbstractObservableTree : AbstractObservable
30 , IObservableTree {
31
32 private bool stale;
33
34 private ListenerList treeListeners = new ListenerListcast(ListenerList.IDENTITY);
35
36 /**
37 * @param realm
38 */
39 public this(Realm realm) {
40 super(realm);
41 }
42
43 public void addChild(TreePath parentPath, Object childElement) {
44 throw new UnsupportedOperationException();
45 }
46
47 public void addTreeChangeListener(ITreeChangeListener listener) {
48 treeListeners.add(listener);
49 }
50
51 public int getChildCount(TreePath parentPath) {
52 return getChildren(parentPath).length;
53 }
54
55 public bool hasChildren(TreePath parentPath) {
56 return getChildCount(parentPath) > 0;
57 }
58
59 public void insertChild(TreePath parentPath, int index, Object childElement) {
60 throw new UnsupportedOperationException();
61 }
62
63 public bool isLazy() {
64 return false;
65 }
66
67 public bool isOrdered() {
68 return false;
69 }
70
71 public void removeChild(TreePath parentPath, Object childElement) {
72 throw new UnsupportedOperationException();
73 }
74
75 public void removeChild(TreePath parentPath, int index) {
76 throw new UnsupportedOperationException();
77 }
78
79 public void removeTreeChangeListener(ITreeChangeListener listener) {
80 treeListeners.remove(listener);
81 }
82
83 public void setChildCount(TreePath parentPath, int count) {
84 throw new UnsupportedOperationException();
85 }
86
87 public void setChildren(TreePath parentPath, Object[] children) {
88 throw new UnsupportedOperationException();
89 }
90
91 public void updateChildren(IChildrenUpdate update) {
92 TreePath parent = update.getParent();
93 Object[] children = getChildren(parent);
94 for (int i = 0; i < update.getLength(); i++) {
95 int targetIndex = update.getOffset() + i;
96 if (targetIndex < children.length) {
97 update.setChild(children[targetIndex], targetIndex);
98 } else {
99 update
100 .setStatus(new Status(
101 IStatus.WARNING,
102 Policy.JFACE_DATABINDING,
103 IStatus.OK,
104 BindingMessages
105 .getStringcast(BindingMessages.INDEX_OUT_OF_RANGE),
106 null));
107 }
108 }
109 update.done();
110 }
111
112 public void updateChildrenCount(IChildrenCountUpdate update) {
113 TreePath[] parents = update.getParents();
114 for (int i = 0; i < parents.length; i++) {
115 update.setChildCount(parents[i], getChildCount(parents[i]));
116 }
117 update.done();
118 }
119
120 public void updateHasChildren(IHasChildrenUpdate update) {
121 TreePath[] parents = update.getElements();
122 for (int i = 0; i < parents.length; i++) {
123 update.setHasChilren(parents[i], hasChildren(parents[i]));
124 }
125 update.done();
126 }
127
128 public bool isStale() {
129 return stale;
130 }
131
132 /**
133 * @param stale
134 */
135 public void setStale(bool stale) {
136 this.stale = stale;
137 if (stale) {
138 fireStale();
139 }
140 }
141
142 protected void fireTreeChange(TreeDiff diff) {
143 // fire general change event first
144 fireChange();
145
146 Object[] listeners = treeListeners.getListeners();
147 TreeChangeEvent event = new TreeChangeEvent(this, diff);
148 for (int i = 0; i < listeners.length; i++) {
149 (cast(ITreeChangeListener) listeners[i]).handleTreeChange(event);
150 }
151 }
152
153 }