Source Code Cross Referenced for OptionTitle.java in  » IDE-Netbeans » visualweb.api.designer » com » sun » rave » web » ui » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » visualweb.api.designer » com.sun.rave.web.ui.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003:         *
004:         * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * The contents of this file are subject to the terms of either the GNU
007:         * General Public License Version 2 only ("GPL") or the Common
008:         * Development and Distribution License("CDDL") (collectively, the
009:         * "License"). You may not use this file except in compliance with the
010:         * License. You can obtain a copy of the License at
011:         * http://www.netbeans.org/cddl-gplv2.html
012:         * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013:         * specific language governing permissions and limitations under the
014:         * License.  When distributing the software, include this License Header
015:         * Notice in each file and include the License file at
016:         * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
017:         * particular file as subject to the "Classpath" exception as provided
018:         * by Sun in the GPL Version 2 section of the License file that
019:         * accompanied this code. If applicable, add the following below the
020:         * License Header, with the fields enclosed by brackets [] replaced by
021:         * your own identifying information:
022:         * "Portions Copyrighted [year] [name of copyright owner]"
023:         *
024:         * Contributor(s):
025:         *
026:         * The Original Software is NetBeans. The Initial Developer of the Original
027:         * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028:         * Microsystems, Inc. All Rights Reserved.
029:         *
030:         * If you wish your version of this file to be governed by only the CDDL
031:         * or only the GPL Version 2, indicate your decision by adding
032:         * "[Contributor] elects to include this software in this distribution
033:         * under the [CDDL or GPL Version 2] license." If you do not indicate a
034:         * single choice of license, a recipient has the option to distribute
035:         * your version of this file under either the CDDL, the GPL Version 2 or
036:         * to extend the choice of license to its licensees as provided above.
037:         * However, if you add GPL Version 2 code and therefore, elected the GPL
038:         * Version 2 license, then the option applies only if the new code is
039:         * made subject to such option by the copyright holder.
040:         */
041:        package com.sun.rave.web.ui.model;
042:
043:        /**
044:         * Use the OptionsTitle class to add a Title to a list or
045:         * array of Options. The label text will be rendered marked by dashes.
046:         * <p>
047:         * Use this class instead of OptionTitle to indicate that no items have
048:         * been selected from this list. This is important in cases where a list
049:         * component like a DropDown or Listbox, may be bound to a null initial
050:         * component value.
051:         * </p><p>
052:         * When these components are bound to a null value, especialy a DropDown
053:         * where a value will always be submitted, it is not possible to
054:         * detect without a special Option that no change has actually occurred
055:         * and a user didn't explicitly select an option. This can
056:         * result in an incorrect value change event and model update.
057:         * </p><p>
058:         * When an OptionTitle is the first option in an array or
059:         * list of Option's assigned to the "items" property of a
060:         * DropDown, OptionTitle's value will be submitted when the form
061:         * is submitted, if a different option is not chosen by the user. When the
062:         * submitted value is decoded, this value will be identified and will treat the
063:         * submission of the DropDown as if it was not submitted.
064:         * </p><p>
065:         * This prevents a false update in the case where a user had not made
066:         * any change at all and the initial value of the DropDown does not
067:         * match the submitted value, such is the case when the initial value
068:         * of the component is null.
069:         * </p><p>
070:         * OptionTitle is also useful for a Listbox where once an
071:         * an item is selected it cannot be deselected. Using OptionTitle
072:         * gives the user an opportunity to select it, thereby deselecting a
073:         * previous selection. On form submit the list will appear as if nothing
074:         * had been selected.
075:         * </p><p>
076:         * NOTE: Calling setValue on this class will not change its
077:         * value. The label can be set.
078:         * </p>
079:         */
080:        public class OptionTitle extends Option {
081:
082:            public static final String NONESELECTED = "com_sun_rave_web_ui_NONESELECTED";
083:
084:            public OptionTitle(String title) {
085:                super (NONESELECTED, title); //NOI18N
086:            }
087:
088:            /*
089:            public String getLabel() {
090:
091:            // FIXME: The dash "look" should be part of the Theme
092:            // ideally as a format String with one parameter.
093:            // 
094:                String label = super.getLabel();
095:                label = "&#8212; ".concat(label).concat(" &#8212;"); 
096:                return label; 
097:            }
098:             */
099:
100:            /**
101:             * The value will not be changed, if this method is called.
102:             */
103:            public void setValue(String value) {
104:            }
105:        }
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