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ItemEvent.java
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1998-09-22
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/*
* @(#)ItemEvent.java 1.14 98/07/01
*
* Copyright 1995-1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* 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.
*/
package java.awt.event;
import java.awt.Component;
import java.awt.AWTEvent;
import java.awt.Event;
import java.awt.ItemSelectable;
/**
* The item event emitted by ItemSelectable objects.
* This event is generated when an item is selected or de-selected.
* @see java.awt.ItemSelectable
* @see ItemListener
*
* @version 1.14 07/01/98
* @author Carl Quinn
*/
public class ItemEvent extends AWTEvent {
/**
* Marks the first integer id for the range of item event ids.
*/
public static final int ITEM_FIRST = 701;
/**
* Marks the last integer id for the range of item event ids.
*/
public static final int ITEM_LAST = 701;
/**
* The item state changed event type.
*/
public static final int ITEM_STATE_CHANGED = ITEM_FIRST; //Event.LIST_SELECT
/**
* The item selected state change type.
*/
public static final int SELECTED = 1;
/**
* The item de-selected state change type.
*/
public static final int DESELECTED = 2;
Object item;
int stateChange;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = -608708132447206933L;
/**
* Constructs a ItemSelectEvent object with the specified ItemSelectable source,
* type, item, and item select state.
* @param source the ItemSelectable object where the event originated
* @id the event type
* @item the item where the event occurred
* @stateChange the state change type which caused the event
*/
public ItemEvent(ItemSelectable source, int id, Object item, int stateChange) {
super(source, id);
this.item = item;
this.stateChange = stateChange;
}
/**
* Returns the ItemSelectable object where this event originated.
*/
public ItemSelectable getItemSelectable() {
return (ItemSelectable)source;
}
/**
* Returns the item where the event occurred.
*/
public Object getItem() {
return item;
}
/**
* Returns the state change type which generated the event.
* @see #SELECTED
* @see #DESELECTED
*/
public int getStateChange() {
return stateChange;
}
public String paramString() {
String typeStr;
switch(id) {
case ITEM_STATE_CHANGED:
typeStr = "ITEM_STATE_CHANGED";
break;
default:
typeStr = "unknown type";
}
String stateStr;
switch(stateChange) {
case SELECTED:
stateStr = "SELECTED";
break;
case DESELECTED:
stateStr = "DESELECTED";
break;
default:
stateStr = "unknown type";
}
return typeStr + ",item="+item + ",stateChange="+stateStr;
}
}