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ContainerEvent.java
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1997-05-20
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/*
* @(#)ContainerEvent.java 1.3 97/01/27 Amy Fowler
*
* Copyright (c) 1996 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
* CopyrightVersion 1.1_beta
*
*/
package java.awt.event;
import java.awt.AWTEvent;
import java.awt.Container;
import java.awt.Component;
/**
* The class for container-level events.
* These events are provided for notification purposes ONLY;
* The AWT will automatically handle container add and remove
* operations internally.
*
* @see ContainerListener
*
* @version 1.3 01/27/97
* @author Tim Prinzing
* @author Amy Fowler
*/
public class ContainerEvent extends ComponentEvent {
/**
* Marks the first integer id for the range of container event ids.
*/
public static final int CONTAINER_FIRST = 300;
/**
* Marks the last integer id for the range of container event ids.
*/
public static final int CONTAINER_LAST = 301;
/**
* The component moved event type.
*/
public static final int COMPONENT_ADDED = CONTAINER_FIRST;
/**
* The component resized event type.
*/
public static final int COMPONENT_REMOVED = 1 + CONTAINER_FIRST;
Component child;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = -4114942250539772041L;
/**
* Constructs a ContainerEvent object with the specified source
* container, type, and child which is being added or removed.
* @param source the container where the event originated
* @id the event type
* @child the child component
*/
public ContainerEvent(Component source, int id, Component child) {
super(source, id);
this.child = child;
}
/**
* Returns the container where this event originated.
*/
public Container getContainer() {
return (Container)source; // cast should always be OK, type was checked in constructor
}
/**
* Returns the child component that was added or removed in
* this event.
*/
public Component getChild() {
return child;
}
public String paramString() {
String typeStr;
switch(id) {
case COMPONENT_ADDED:
typeStr = "COMPONENT_ADDED";
break;
case COMPONENT_REMOVED:
typeStr = "COMPONENT_REMOVED";
break;
default:
typeStr = "unknown type";
}
return typeStr + ",child="+child.getName();
}
}