| /* ComponentEvent.java -- notification of events for components |
| Copyright (C) 1999, 2002, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package java.awt.event; |
| |
| import java.awt.AWTEvent; |
| import java.awt.Component; |
| |
| /** |
| * This class is for events generated when a component is moved, resized, |
| * hidden, or shown. These events normally do not need to be handled by the |
| * application, since the AWT system automatically takes care of them. This |
| * is also the superclass for other events on components, but |
| * ComponentListeners ignore such subclasses. |
| * |
| * @author Aaron M. Renn (arenn@urbanophile.com) |
| * @see ComponentAdapter |
| * @see ComponentListener |
| * @since 1.1 |
| * @status updated to 1.4 |
| */ |
| public class ComponentEvent extends AWTEvent |
| { |
| /** |
| * Compatible with JDK 1.1+. |
| */ |
| private static final long serialVersionUID = 8101406823902992965L; |
| |
| /** This is the first id in the range of ids used by this class. */ |
| public static final int COMPONENT_FIRST = 100; |
| |
| /** This is the last id in the range of ids used by this class. */ |
| public static final int COMPONENT_LAST = 103; |
| |
| /** This id indicates that a component was moved. */ |
| public static final int COMPONENT_MOVED = 100; |
| |
| /** This id indicates that a component was resized. */ |
| public static final int COMPONENT_RESIZED = 101; |
| |
| /** This id indicates that a component was shown. */ |
| public static final int COMPONENT_SHOWN = 102; |
| |
| /** This id indicates that a component was hidden. */ |
| public static final int COMPONENT_HIDDEN = 103; |
| |
| /** |
| * Initializes a new instance of <code>ComponentEvent</code> with the |
| * specified source and id. Note that an invalid id leads to unspecified |
| * results. |
| * |
| * @param source the source of the event |
| * @param id the event id |
| * @throws IllegalArgumentException if source is null |
| */ |
| public ComponentEvent(Component source, int id) |
| { |
| super(source, id); |
| } |
| |
| /** |
| * This method returns the event source as a <code>Component</code>. If the |
| * source has subsequently been modified to a non-Component, this returns |
| * null. |
| * |
| * @return the event source as a <code>Component</code>, or null |
| */ |
| public Component getComponent() |
| { |
| return source instanceof Component ? (Component) source : null; |
| } |
| |
| /** |
| * This method returns a string identifying this event. This is the field |
| * name of the id type, and for COMPONENT_MOVED or COMPONENT_RESIZED, the |
| * new bounding box of the component. |
| * |
| * @return a string identifying this event |
| */ |
| public String paramString() |
| { |
| // Unlike Sun, we don't throw NullPointerException or ClassCastException |
| // when source was illegally changed. |
| switch (id) |
| { |
| case COMPONENT_MOVED: |
| return "COMPONENT_MOVED " |
| + (source instanceof Component |
| ? ((Component) source).getBounds() : (Object) ""); |
| case COMPONENT_RESIZED: |
| return "COMPONENT_RESIZED " |
| + (source instanceof Component |
| ? ((Component) source).getBounds() : (Object) ""); |
| case COMPONENT_SHOWN: |
| return "COMPONENT_SHOWN"; |
| case COMPONENT_HIDDEN: |
| return "COMPONENT_HIDDEN"; |
| default: |
| return "unknown type"; |
| } |
| } |
| } // class ComponentEvent |