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1 /* 2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/define/DynamicTag.java,v 1.7 2002/05/17 15:18:12 jstrachan Exp $ 3 * $Revision: 1.7 $ 4 * $Date: 2002/05/17 15:18:12 $ 5 * 6 * ==================================================================== 7 * 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, if 26 * any, must include the following acknowlegement: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowlegement may appear in the software itself, 30 * if and wherever such third-party acknowlegements normally appear. 31 * 32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software 33 * Foundation" must not be used to endorse or promote products derived 34 * from this software without prior written permission. For written 35 * permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache" 38 * nor may "Apache" appear in their names without prior written 39 * permission of the Apache Group. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>;. 59 * 60 * $Id: DynamicTag.java,v 1.7 2002/05/17 15:18:12 jstrachan Exp $ 61 */ 62 package org.apache.commons.jelly.tags.swing; 63 64 65 import java.awt.Component; 66 import java.awt.Container; 67 import java.awt.Dimension; 68 import java.awt.Point; 69 import java.awt.Window; 70 import java.awt.event.WindowListener; 71 72 import javax.swing.*; 73 74 import org.apache.commons.beanutils.BeanUtils; 75 import org.apache.commons.beanutils.ConvertingWrapDynaBean; 76 import org.apache.commons.beanutils.ConvertUtils; 77 78 import org.apache.commons.collections.BeanMap; 79 80 import org.apache.commons.jelly.DynaBeanTagSupport; 81 import org.apache.commons.jelly.XMLOutput; 82 import org.apache.commons.jelly.impl.BeanSource; 83 84 import org.apache.commons.logging.Log; 85 import org.apache.commons.logging.LogFactory; 86 87 /*** 88 * This tag creates a Swing component and adds it to its parent tag, optionally declaring this 89 * component as a variable if the <i>var</i> attribute is specified.</p> 90 * 91 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 92 * @version $Revision: 1.7 $ 93 */ 94 public class ComponentTag extends DynaBeanTagSupport implements BeanSource { 95 96 /*** The Log to which logging calls will be made. */ 97 private static final Log log = LogFactory.getLog(ComponentTag.class); 98 99 /*** the factory of widgets */ 100 private Factory factory; 101 102 /*** the current bean instance */ 103 private Object bean; 104 105 /*** the current variable name that the bean should be exported as */ 106 private String var; 107 108 public ComponentTag(Factory factory) { 109 this.factory = factory; 110 } 111 112 /*** 113 * Adds a child component to this parent 114 */ 115 public void addChild(Component component) { 116 Object parent = getBean(); 117 if ( parent instanceof JFrame && component instanceof JMenuBar ) { 118 JFrame frame = (JFrame) parent; 119 frame.setJMenuBar( (JMenuBar) component ); 120 } 121 else if ( parent instanceof RootPaneContainer ) { 122 RootPaneContainer rpc = (RootPaneContainer) parent; 123 rpc.getContentPane().add( component ); 124 } 125 else if ( parent instanceof JScrollPane ) { 126 JScrollPane scrollPane = (JScrollPane) parent; 127 scrollPane.setViewportView( component ); 128 } 129 else if ( parent instanceof JSplitPane) { 130 JSplitPane splitPane = (JSplitPane) parent; 131 if ( splitPane.getOrientation() == JSplitPane.HORIZONTAL_SPLIT ) { 132 if ( splitPane.getTopComponent() == null ) { 133 splitPane.setTopComponent( component ); 134 } 135 else { 136 splitPane.setBottomComponent( component ); 137 } 138 } 139 else { 140 if ( splitPane.getLeftComponent() == null ) { 141 splitPane.setLeftComponent( component ); 142 } 143 else { 144 splitPane.setRightComponent( component ); 145 } 146 } 147 } 148 else if ( parent instanceof JMenuBar && component instanceof JMenu ) { 149 JMenuBar menuBar = (JMenuBar) parent; 150 menuBar.add( (JMenu) component ); 151 } 152 else if ( parent instanceof Container ) { 153 Container container = (Container) parent; 154 container.add( component ); 155 } 156 } 157 158 159 /*** 160 * Sets the Action of this component 161 */ 162 public void setAction(Action action) throws Exception { 163 Component component = getComponent(); 164 if ( component != null ) { 165 // lets just try set the 'action' property 166 BeanUtils.setProperty( component, "action", action ); 167 } 168 } 169 170 /*** 171 * Adds a WindowListener to this component 172 */ 173 public void addWindowListener(WindowListener listener) throws Exception { 174 Component component = getComponent(); 175 if ( component instanceof Window ) { 176 Window window = (Window) component; 177 window.addWindowListener(listener); 178 } 179 } 180 181 // DynaTag interface 182 //------------------------------------------------------------------------- 183 public void beforeSetAttributes() throws Exception { 184 // create a new dynabean before the attributes are set 185 bean = factory.newInstance(); 186 setDynaBean( new ConvertingWrapDynaBean( bean ) ); 187 } 188 189 public void setAttribute(String name, Object value) throws Exception { 190 if (name.equals( "var" ) ) { 191 this.var = value.toString(); 192 } 193 else { 194 // ### special hacks for properties that don't introspect properly 195 Component component = getComponent(); 196 if ( component != null ) { 197 if ( name.equals( "location" ) ) { 198 Point p = null; 199 if ( value instanceof Point ) { 200 p = (Point) value; 201 } 202 else if ( value != null) { 203 p = (Point) ConvertUtils.convert( value.toString(), Point.class ); 204 } 205 component.setLocation(p); 206 } 207 else if ( name.equals( "size" ) ) { 208 Dimension d = null; 209 if ( value instanceof Dimension ) { 210 d = (Dimension) value; 211 } 212 else if ( value != null) { 213 d = (Dimension) ConvertUtils.convert( value.toString(), Dimension.class ); 214 } 215 component.setSize(d); 216 } 217 else { 218 super.setAttribute(name, value); 219 } 220 } 221 else { 222 super.setAttribute(name, value); 223 } 224 } 225 } 226 227 // Tag interface 228 //------------------------------------------------------------------------- 229 public void doTag(XMLOutput output) throws Exception { 230 231 // export the bean if required 232 if ( var != null ) { 233 context.setVariable(var, bean); 234 } 235 236 invokeBody(output); 237 238 // now we should add this component to its parent... 239 // This is currently quite simplistic. 240 // We could well support layout managers and such like 241 242 Component component = getComponent(); 243 if ( component != null ) { 244 ComponentTag parentTag = (ComponentTag) findAncestorWithClass( ComponentTag.class ); 245 if ( parentTag != null ) { 246 parentTag.addChild(component); 247 } 248 } 249 } 250 251 // Properties 252 //------------------------------------------------------------------------- 253 254 /*** 255 * @return the bean that has just been created 256 */ 257 public Object getBean() { 258 return bean; 259 } 260 261 /*** 262 * @return the visible component, if there is one. 263 */ 264 public Component getComponent() { 265 if ( bean instanceof Component ) { 266 return (Component) bean; 267 } 268 return null; 269 } 270 }

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