Source Code Cross Referenced for ItemEvent.java in  » 6.0-JDK-Modules » j2me » java » awt » event » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.awt.event 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * @(#)ItemEvent.java	1.23 06/10/10
003:         *
004:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation. 
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt). 
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA 
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions. 
025:         *
026:         */
027:
028:        package java.awt.event;
029:
030:        import java.awt.Component;
031:        import java.awt.AWTEvent;
032:        import java.awt.ItemSelectable;
033:
034:        /**
035:         * The item event emitted by ItemSelectable objects.
036:         * This event is generated when an item is selected or de-selected.
037:         * @see java.awt.ItemSelectable
038:         * @see ItemListener
039:         *
040:         * @version 1.19 08/19/02
041:         * @author Carl Quinn
042:         */
043:        public class ItemEvent extends AWTEvent {
044:            /**
045:             * Marks the first integer id for the range of item event ids.
046:             */
047:            public static final int ITEM_FIRST = 701;
048:            /**
049:             * Marks the last integer id for the range of item event ids.
050:             */
051:            public static final int ITEM_LAST = 701;
052:            /** 
053:             * The item state changed event type.
054:             */
055:            public static final int ITEM_STATE_CHANGED = ITEM_FIRST; //Event.LIST_SELECT 
056:            /**
057:             * The item selected state change type.
058:             */
059:            public static final int SELECTED = 1;
060:            /** 
061:             * The item de-selected state change type.
062:             */
063:            public static final int DESELECTED = 2;
064:            Object item;
065:            int stateChange;
066:            /*
067:             * JDK 1.1 serialVersionUID 
068:             */
069:            private static final long serialVersionUID = -608708132447206933L;
070:
071:            /**
072:             * Constructs a ItemSelectEvent object with the specified ItemSelectable source,
073:             * type, item, and item select state.
074:             * @param source the ItemSelectable object where the event originated
075:             * @id the event type
076:             * @item the item where the event occurred
077:             * @stateChange the state change type which caused the event
078:             */
079:            public ItemEvent(ItemSelectable source, int id, Object item,
080:                    int stateChange) {
081:                super (source, id);
082:                this .item = item;
083:                this .stateChange = stateChange;
084:            }
085:
086:            /**
087:             * Returns the ItemSelectable object where this event originated.
088:             */
089:            public ItemSelectable getItemSelectable() {
090:                return (ItemSelectable) source;
091:            }
092:
093:            /**
094:             * Returns the item where the event occurred.
095:             */
096:            public Object getItem() {
097:                return item;
098:            }
099:
100:            /**
101:             * Returns the state change type which generated the event.
102:             * @see #SELECTED
103:             * @see #DESELECTED
104:             */
105:            public int getStateChange() {
106:                return stateChange;
107:            }
108:
109:            public String paramString() {
110:                String typeStr;
111:                switch (id) {
112:                case ITEM_STATE_CHANGED:
113:                    typeStr = "ITEM_STATE_CHANGED";
114:                    break;
115:
116:                default:
117:                    typeStr = "unknown type";
118:                }
119:                String stateStr;
120:                switch (stateChange) {
121:                case SELECTED:
122:                    stateStr = "SELECTED";
123:                    break;
124:
125:                case DESELECTED:
126:                    stateStr = "DESELECTED";
127:                    break;
128:
129:                default:
130:                    stateStr = "unknown type";
131:                }
132:                return typeStr + ",item=" + item + ",stateChange=" + stateStr;
133:            }
134:        }
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