001: /* ====================================================================
002: * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
003: *
004: * Copyright (c) 1995-2002 Jcorporate Ltd. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution,
019: * if any, must include the following acknowledgment:
020: * "This product includes software developed by Jcorporate Ltd.
021: * (http://www.jcorporate.com/)."
022: * Alternately, this acknowledgment may appear in the software itself,
023: * if and wherever such third-party acknowledgments normally appear.
024: *
025: * 4. "Jcorporate" and product names such as "Expresso" must
026: * not be used to endorse or promote products derived from this
027: * software without prior written permission. For written permission,
028: * please contact info@jcorporate.com.
029: *
030: * 5. Products derived from this software may not be called "Expresso",
031: * or other Jcorporate product names; nor may "Expresso" or other
032: * Jcorporate product names appear in their name, without prior
033: * written permission of Jcorporate Ltd.
034: *
035: * 6. No product derived from this software may compete in the same
036: * market space, i.e. framework, without prior written permission
037: * of Jcorporate Ltd. For written permission, please contact
038: * partners@jcorporate.com.
039: *
040: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
041: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
042: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
043: * DISCLAIMED. IN NO EVENT SHALL JCORPORATE LTD OR ITS CONTRIBUTORS
044: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
045: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
046: * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
047: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
048: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
049: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
050: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
051: * SUCH DAMAGE.
052: * ====================================================================
053: *
054: * This software consists of voluntary contributions made by many
055: * individuals on behalf of the Jcorporate Ltd. Contributions back
056: * to the project(s) are encouraged when you make modifications.
057: * Please send them to support@jcorporate.com. For more information
058: * on Jcorporate Ltd. and its products, please see
059: * <http://www.jcorporate.com/>.
060: *
061: * Portions of this software are based upon other open source
062: * products and are subject to their respective licenses.
063: */
064:
065: package com.jcorporate.expresso.services.html;
066:
067: import java.io.PrintWriter;
068: import java.util.Enumeration;
069: import java.util.Vector;
070:
071: /**
072: * Encapsulates an HTML radio box on an HTML form
073: *
074: * @author Michael P. Nash
075: * @version $Revision: 1.8 $ $Date: 2004/11/17 20:48:18 $
076: */
077: public class Radio extends HtmlElement {
078: private String fieldName = null;
079: private String currentValue = ("");
080: private Vector values = new Vector(3);
081: private Vector labels = new Vector(3);
082: private String this Class = (this .getClass().getName() + ".");
083: private boolean isVertical = false;
084:
085: /**
086: * Constructor Create a new Radio list with the specified field name
087: *
088: * @param newFieldName Field name of the new drop down, must not be null
089: * @throws HtmlException If the parameter is invalid
090: */
091: public Radio(String newFieldName) throws HtmlException {
092: super (newFieldName);
093:
094: String myName = (this Class + "Radio(String)");
095:
096: if (newFieldName == null) {
097: throw new HtmlException(myName
098: + ":Field name must not be null for " + getName());
099: }
100:
101: fieldName = newFieldName;
102: } /* Radio(String) */
103:
104: /**
105: * Create a drop down with the field name as given with a specific current value
106: *
107: * @param newFieldName Field name of the new radio
108: * @param newCurrentValue Current value of the drop down (selected item)
109: * @throws HtmlException If the parameters are invalid
110: */
111: public Radio(String newFieldName, String newCurrentValue)
112: throws HtmlException {
113: super (newFieldName);
114: fieldName = newFieldName;
115: currentValue = newCurrentValue;
116: } /* Radio(String, String) */
117:
118: /**
119: * Add a new option to this radio
120: *
121: * @param fieldValue Value of the new option
122: * @param fieldLabel Label of the new option
123: * @throws HtmlException If the parameters are invalid
124: */
125: public synchronized void addOption(String fieldValue,
126: String fieldLabel) throws HtmlException {
127: values.addElement(fieldValue);
128: labels.addElement(fieldLabel);
129: } /* addOption(String, String) */
130:
131: /**
132: * Display this Radio to the appropriate PrintWriter
133: *
134: * @param depth the number of tabs to indent
135: * @param out PrintWriter to display
136: * @throws HtmlException If the Radio cannot be displayed
137: */
138: protected synchronized void display(PrintWriter out, int depth)
139: throws HtmlException {
140: String myName = (this Class + "display(PrintWriter)");
141:
142: if (values.size() == 0) {
143: throw new HtmlException(myName + ":Radio " + getName()
144: + " has no choices");
145: }
146:
147: String oneValue = null;
148: String oneLabel = null;
149: Enumeration e2 = labels.elements();
150:
151: for (Enumeration e = values.elements(); e.hasMoreElements();) {
152: oneValue = (String) e.nextElement();
153: oneLabel = (String) e2.nextElement();
154:
155: if (isVertical) {
156: this .padWithTabs(out, depth);
157: out.print("<br />");
158: }
159: if (currentValue.equals(oneValue)) {
160: this .padWithTabs(out, depth);
161: out.println("<input type=radio name=\"" + fieldName
162: + "\" checked value=\"" + oneValue + "\">"
163: + oneLabel);
164: } else {
165: this .padWithTabs(out, depth);
166: out.println("<input type=radio NAME=\"" + fieldName
167: + "\" value=\"" + oneValue + "\">" + oneLabel);
168: }
169: }
170:
171: this .padWithTabs(out, depth);
172: out.println("</input>");
173: setDisplayed();
174: } /* display(PrintWriter) */
175:
176: /**
177: * Set the currently selected value for this radio
178: *
179: * @param newCurrentValue The value for this drop down
180: * @throws HtmlException If the parameter is invalid
181: */
182: public void setCurrentValue(String newCurrentValue)
183: throws HtmlException {
184: currentValue = newCurrentValue;
185: } /* setCurrentValue(String) */
186:
187: /**
188: * @param state set to true for vertical radio buttons
189: */
190: public void setVertical(boolean state) {
191: isVertical = state;
192: } /* setVertical(boolean) */
193:
194: } /* Radio */
195:
196: /* Radio */
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