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 drop-down 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 DropDown 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:
084: /**
085: * Constructor Create a new DropDown list with the specified field name
086: *
087: * @param newFieldName Field name of the new drop down, must not be null
088: * @throws HtmlException If the parameter is invalid
089: */
090: public DropDown(String newFieldName) throws HtmlException {
091: super (newFieldName);
092:
093: String myName = (this Class + "DropDown(String)");
094:
095: if (newFieldName == null) {
096: throw new HtmlException(myName
097: + ":Field name must not be null for " + getName());
098: }
099:
100: fieldName = newFieldName;
101: } /* DropDown(String) */
102:
103: /**
104: * Create a drop down with the field name as given with a specific current value
105: *
106: * @param newFieldName Field name of the new drop-down
107: * @param newCurrentValue Current value of the drop down (selected item)
108: * @throws HtmlException If the parameters are invalid
109: */
110: public DropDown(String newFieldName, String newCurrentValue)
111: throws HtmlException {
112: super (newFieldName);
113: fieldName = newFieldName;
114: currentValue = newCurrentValue;
115: } /* DropDown(String, String) */
116:
117: /**
118: * Add a new option to this drop-down
119: *
120: * @param fieldValue Value of the new option
121: * @param fieldLabel Label of the new option
122: * @throws HtmlException If the parameters are invalid
123: */
124: public synchronized void addOption(String fieldValue,
125: String fieldLabel) throws HtmlException {
126: values.addElement(fieldValue);
127: labels.addElement(fieldLabel);
128: } /* addOption(String, String) */
129:
130: /**
131: * Display this DropDown to the appropriate PrintWriter
132: *
133: * @param out PrintWriter to display
134: * @param depth the number of tabs to indent
135: * @throws HtmlException If the DropDown cannot be displayed
136: */
137: protected synchronized void display(PrintWriter out, int depth)
138: throws HtmlException {
139: String myName = (this Class + "display(PrintWriter)");
140:
141: if (values.size() == 0) {
142: throw new HtmlException(myName + ":DropDown " + getName()
143: + " has no choices");
144: }
145:
146: this .padWithTabs(out, depth);
147: out.print("<select");
148:
149: if (cSSClass != null) {
150: out.print(" class=\"" + cSSClass + "\"");
151: }
152: if (cSSID != null) {
153: out.print(" id=\"" + cSSID + "\"");
154: }
155:
156: out.println(" name=" + fieldName + ">");
157:
158: String oneValue = null;
159: String oneLabel = null;
160: Enumeration e2 = labels.elements();
161:
162: for (Enumeration e = values.elements(); e.hasMoreElements();) {
163: oneValue = (String) e.nextElement();
164: oneLabel = (String) e2.nextElement();
165:
166: if (currentValue.equals(oneValue)) {
167: this .padWithTabs(out, depth + 1);
168: out.println("<option selected value=\"" + oneValue
169: + "\">" + oneLabel);
170: } else {
171: this .padWithTabs(out, depth + 1);
172: out.println("<option value=\"" + oneValue + "\">"
173: + oneLabel);
174: }
175: }
176:
177: this .padWithTabs(out, depth);
178: out.println("</select>");
179: setDisplayed();
180: } /* display(PrintWriter) */
181:
182: /**
183: * Set the currently selected value for this drop-down
184: *
185: * @param newCurrentValue The value for this drop down
186: * @throws HtmlException If the parameter is invalid
187: */
188: public void setCurrentValue(String newCurrentValue)
189: throws HtmlException {
190: currentValue = newCurrentValue;
191: } /* setCurrentValue(String) */
192:
193: } /* DropDown */
194:
195: /* DropDown */
|