--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/awt/event/ComponentEvent.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,158 @@
+/*
+ * Copyright 1996-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.awt.event;
+
+import java.awt.AWTEvent;
+import java.awt.Component;
+import java.awt.Rectangle;
+
+/**
+ * A low-level event which indicates that a component moved, changed
+ * size, or changed visibility (also, the root class for the other
+ * component-level events).
+ * <P>
+ * Component events are provided for notification purposes ONLY;
+ * The AWT will automatically handle component moves and resizes
+ * internally so that GUI layout works properly regardless of
+ * whether a program is receiving these events or not.
+ * <P>
+ * In addition to serving as the base class for other component-related
+ * events (InputEvent, FocusEvent, WindowEvent, ContainerEvent),
+ * this class defines the events that indicate changes in
+ * a component's size, position, or visibility.
+ * <P>
+ * This low-level event is generated by a component object (such as a
+ * List) when the component is moved, resized, rendered invisible, or made
+ * visible again. The event is passed to every <code>ComponentListener</code>
+ * or <code>ComponentAdapter</code> object which registered to receive such
+ * events using the component's <code>addComponentListener</code> method.
+ * (<code>ComponentAdapter</code> objects implement the
+ * <code>ComponentListener</code> interface.) Each such listener object
+ * gets this <code>ComponentEvent</code> when the event occurs.
+ *
+ * @see ComponentAdapter
+ * @see ComponentListener
+ * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/componentlistener.html">Tutorial: Writing a Component Listener</a>
+ *
+ * @author Carl Quinn
+ * @since 1.1
+ */
+public class ComponentEvent extends AWTEvent {
+
+ /**
+ * The first number in the range of ids used for component events.
+ */
+ public static final int COMPONENT_FIRST = 100;
+
+ /**
+ * The last number in the range of ids used for component events.
+ */
+ public static final int COMPONENT_LAST = 103;
+
+ /**
+ * This event indicates that the component's position changed.
+ */
+ public static final int COMPONENT_MOVED = COMPONENT_FIRST;
+
+ /**
+ * This event indicates that the component's size changed.
+ */
+ public static final int COMPONENT_RESIZED = 1 + COMPONENT_FIRST;
+
+ /**
+ * This event indicates that the component was made visible.
+ */
+ public static final int COMPONENT_SHOWN = 2 + COMPONENT_FIRST;
+
+ /**
+ * This event indicates that the component was rendered invisible.
+ */
+ public static final int COMPONENT_HIDDEN = 3 + COMPONENT_FIRST;
+
+ /*
+ * JDK 1.1 serialVersionUID
+ */
+ private static final long serialVersionUID = 8101406823902992965L;
+
+ /**
+ * Constructs a <code>ComponentEvent</code> object.
+ * <p>Note that passing in an invalid <code>id</code> results in
+ * unspecified behavior. This method throws an
+ * <code>IllegalArgumentException</code> if <code>source</code>
+ * is <code>null</code>.
+ *
+ * @param source the <code>Component</code> that originated the event
+ * @param id an integer indicating the type of event
+ * @throws IllegalArgumentException if <code>source</code> is null
+ */
+ public ComponentEvent(Component source, int id) {
+ super(source, id);
+ }
+
+ /**
+ * Returns the originator of the event.
+ *
+ * @return the <code>Component</code> object that originated
+ * the event, or <code>null</code> if the object is not a
+ * <code>Component</code>.
+ */
+ public Component getComponent() {
+ return (source instanceof Component) ? (Component)source : null;
+ }
+
+ /**
+ * Returns a parameter string identifying this event.
+ * This method is useful for event-logging and for debugging.
+ *
+ * @return a string identifying the event and its attributes
+ */
+ public String paramString() {
+ String typeStr;
+ Rectangle b = (source !=null
+ ? ((Component)source).getBounds()
+ : null);
+
+ switch(id) {
+ case COMPONENT_SHOWN:
+ typeStr = "COMPONENT_SHOWN";
+ break;
+ case COMPONENT_HIDDEN:
+ typeStr = "COMPONENT_HIDDEN";
+ break;
+ case COMPONENT_MOVED:
+ typeStr = "COMPONENT_MOVED ("+
+ b.x+","+b.y+" "+b.width+"x"+b.height+")";
+ break;
+ case COMPONENT_RESIZED:
+ typeStr = "COMPONENT_RESIZED ("+
+ b.x+","+b.y+" "+b.width+"x"+b.height+")";
+ break;
+ default:
+ typeStr = "unknown type";
+ }
+ return typeStr;
+ }
+}