home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
PC World Komputer 1998 July & August
/
Pcwk78a98.iso
/
Internet
/
Javadraw
/
DATA.Z
/
ComponentEvent.java
< prev
next >
Wrap
Text File
|
1997-08-30
|
4KB
|
124 lines
/*
* @(#)ComponentEvent.java 1.14 97/01/27 Carl Quinn
*
* Copyright (c) 1995, 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.Event;
import java.awt.Component;
import java.awt.Rectangle;
/**
* The root event class for all component-level events.
* These 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.
*
* @see ComponentListener
*
* @version 1.14 01/27/97
* @author Carl Quinn
*/
public class ComponentEvent extends AWTEvent {
/**
* Marks the first integer id for the range of component event ids.
*/
public static final int COMPONENT_FIRST = 100;
/**
* Marks the last integer id for the range of component event ids.
*/
public static final int COMPONENT_LAST = 103;
/**
* The component moved event type.
*/
public static final int COMPONENT_MOVED = COMPONENT_FIRST;
/**
* The component resized event type.
*/
public static final int COMPONENT_RESIZED = 1 + COMPONENT_FIRST;
/**
* The component shown event type.
*/
public static final int COMPONENT_SHOWN = 2 + COMPONENT_FIRST;
/**
* The component hidden event type.
*/
public static final int COMPONENT_HIDDEN = 3 + COMPONENT_FIRST;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 8101406823902992965L;
/**
* Constructs a ComponentEvent object with the specified source component
* and type.
* @param source the component where the event originated
* @id the event type
*/
public ComponentEvent(Component source, int id) {
super(source, id);
}
/**
* Returns the component where this event originated.
*/
public Component getComponent() {
// return (source instanceof Component) ? (Component)source : null;
return (Component)source; // cast should always be OK, type was checked in constructor
}
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;
}
}