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/* ItemEvent.java -- Event for item state changes.
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the non-peer AWT libraries of GNU Classpath.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation, either version 2 of the License, or
(at your option) any later verion.
This library 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, write to the Free Software Foundation
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA. */
package java.awt.event;
import java.awt.ItemSelectable;
/**
* This event is generated when an item changes state.
*
* @author Aaron M. Renn (arenn@urbanophile.com)
*/
public class ItemEvent extends java.awt.AWTEvent implements java.io.Serializable
{
/*
* Static Variables
*/
/**
* This is the first id in the event id range used by this class.
*/
public static final int ITEM_FIRST = 701;
/**
* This is the last id in the event id range used by this class.
*/
public static final int ITEM_LAST = 701;
/**
* This event id indicates a state change occurred.
*/
public static final int ITEM_STATE_CHANGED = 701;
/**
* This type indicates that the item was selected.
*/
public static final int SELECTED = 1;
/**
* This type indicates that the item was deselected.
*/
public static final int DESELECTED = 2;
/*************************************************************************/
/*
* Instance Variables
*/
/**
* @serial The item affected by this event
*/
private Object item;
/**
* @serial The state change direction
*/
private int stateChange;
/*************************************************************************/
/*
* Constructors
*/
/**
* Initializes a new instance of <code>ItemEvent</code> with the specified
* source, id, and state change constant.
*
* @param source The source of the event.
* @param id The event id.
* @param item The item affected by the state change.
* @param stateChange The state change, either <code>SELECTED</code> or
* <code>DESELECTED</code>.
*/
public
ItemEvent(ItemSelectable source, int id, Object item, int stateChange)
{
super(source, id);
this.item = item;
this.stateChange = stateChange;
}
/*************************************************************************/
/*
* Instance Methods
*/
/**
* This method returns the event source as an <code>ItemSelectable</code>.
*
* @return The event source as an <code>ItemSelected</code>.
*/
public ItemSelectable
getItemSelectable()
{
return((ItemSelectable)getSource());
}
/*************************************************************************/
/**
* Returns the item affected by this state change.
*
* @return The item affected by this state change.
*/
public Object
getItem()
{
return(item);
}
/*************************************************************************/
/**
* Returns the type of state change, ether <code>SELECTED</code> or
* <code>DESELECTED</code>.
*
* @return The type of state change.
*/
public int
getStateChange()
{
return(stateChange);
}
/*************************************************************************/
/**
* Returns a string identifying this event.
*
* @param A string identifying this event.
*/
public String
paramString()
{
return(getClass().getName() + " source=" + getSource() + " id=" + getID() +
" item=" + getItem() + " stateChange=" + getStateChange());
}
} // class ItemEvent
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