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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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