1 /*
2 * Copyright (c) 2003 Scott Howlett & Paul Libbrecht.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. The end-user documentation included with the redistribution,
18 * if any, must include the following acknowledgment:
19 * "This product includes software developed by the Xwing
20 * Project ( http://xwing.sourceforge.net/ )."
21 * Alternately, this acknowledgment may appear in the software itself,
22 * if and wherever such third-party acknowledgments normally appear.
23 *
24 * 4. The name "Xwing" must not be used to endorse or promote products
25 * derived from this software without prior written permission. For
26 * written permission, please contact the project authors via
27 * the Xwing project site, http://xwing.sourceforge.net/ .
28 *
29 * 5. Products derived from this software may not be called "Xwing",
30 * nor may "Xwing" appear in their name, without prior written
31 * permission of the Xwing project.
32 *
33 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
34 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36 * DISCLAIMED. IN NO EVENT SHALL THE XWING AUTHORS OR THE PROJECT
37 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 * SUCH DAMAGE.
45 *
46 * For more information on Xwing, please see
47 * < http://xwing.sourceforge.net/ >.
48 */
49
50 package net.sourceforge.xwing.jelly.tags.xwing;
51
52 import javax.swing.event.TreeSelectionEvent;
53 import javax.swing.event.TreeSelectionListener;
54 import javax.swing.tree.TreePath;
55
56 import net.sourceforge.xwing.dom.XTreeNode;
57 import net.sourceforge.xwing.dom.XTreeTemplate;
58
59 import org.apache.commons.jelly.JellyTagException;
60 import org.apache.commons.jelly.Script;
61 import org.apache.commons.jelly.TagSupport;
62 import org.apache.commons.jelly.XMLOutput;
63 import org.apache.commons.logging.LogFactory;
64 import org.w3c.dom.Node;
65
66 public class TreeSelectionListenerTag extends TagSupport {
67
68 private String var;
69 private Script valueChanged;
70 private String treeNodeVar;
71 private String xmlNodeVar;
72
73 public void doTag(final XMLOutput output) throws JellyTagException {
74
75 // now lets add this action to its parent if we have one
76 TreeTag tag = (TreeTag) findAncestorWithClass(TreeTag.class);
77 if (tag != null) {
78 TreeSelectionListener l = new TreeSelectionListener() {
79 public void valueChanged(TreeSelectionEvent e) {
80 try {
81 invokeScript(output, e, valueChanged);
82 } catch (Exception exc) {
83 LogFactory.getLog(getClass()).error(
84 "Error in valueChanged",
85 exc);
86 }
87 }
88
89 };
90
91 tag.getTree().addTreeSelectionListener(l);
92
93 }
94 }
95
96 public void setVar(String var) {
97 this.var = var;
98 }
99
100 public void setTreeNodeVar(String var) {
101 this.treeNodeVar = var;
102 }
103
104 public void setXmlNodeVar(String var) {
105 this.xmlNodeVar = var;
106 }
107
108 public void setValueChanged(Script valueChanged) {
109 this.valueChanged = valueChanged;
110 }
111
112 protected void invokeScript(
113 XMLOutput output,
114 TreeSelectionEvent event,
115 Script script)
116 throws Exception {
117
118 try {
119
120 if (xmlNodeVar != null || treeNodeVar != null) {
121 TreePath p = event.getNewLeadSelectionPath();
122 XTreeNode tn =
123 p == null ? null : (XTreeNode) p.getLastPathComponent();
124
125 if (tn == null) {
126 return;
127 }
128
129 Node xmlNode = tn.getNode();
130 XTreeTemplate tmpl = tn.getTemplate();
131
132 if (xmlNodeVar != null && xmlNode == null) {
133 return;
134 }
135
136 if (treeNodeVar != null && tmpl == null) {
137 return;
138 }
139
140 if (xmlNodeVar != null) {
141 context.setVariable(xmlNodeVar, xmlNode);
142 }
143
144 if (treeNodeVar != null) {
145 context.setVariable(treeNodeVar, tmpl);
146 }
147 }
148
149 if (var != null) {
150 context.setVariable(var, event);
151 }
152
153 if (script != null) {
154 script.run(context, output);
155 } else {
156 invokeBody(output);
157 }
158 } finally {
159 if (var != null) {
160 context.removeVariable(var);
161 }
162 if (xmlNodeVar != null) {
163 context.removeVariable(xmlNodeVar);
164 }
165 if (treeNodeVar != null) {
166 context.removeVariable(treeNodeVar);
167 }
168 }
169 }
170
171 }
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