Line | Hits | Source |
---|---|---|
1 | /* | |
2 | * Copyright (c) 2005, the JUNG Project and the Regents of the University of | |
3 | * California All rights reserved. | |
4 | * | |
5 | * This software is open-source under the BSD license; see either "license.txt" | |
6 | * or http://jung.sourceforge.net/license.txt for a description. | |
7 | * | |
8 | * | |
9 | * Created on Apr 2, 2005 | |
10 | */ | |
11 | package edu.uci.ics.jung.visualization; | |
12 | ||
13 | import java.awt.event.ItemEvent; | |
14 | import java.awt.event.ItemListener; | |
15 | ||
16 | import javax.swing.event.EventListenerList; | |
17 | ||
18 | /** | |
19 | * An abstract class to support ItemEvents for PickedState | |
20 | * | |
21 | * @author Tom Nelson | |
22 | */ | |
23 | 0 | public abstract class AbstractPickedState implements PickedState { |
24 | ||
25 | 0 | protected EventListenerList listenerList = new EventListenerList(); |
26 | ||
27 | public void addItemListener(ItemListener l) { | |
28 | 0 | listenerList.add(ItemListener.class, l); |
29 | ||
30 | 0 | } |
31 | ||
32 | public void removeItemListener(ItemListener l) { | |
33 | 0 | listenerList.remove(ItemListener.class, l); |
34 | 0 | } |
35 | ||
36 | protected void fireItemStateChanged(ItemEvent e) { | |
37 | 0 | Object[] listeners = listenerList.getListenerList(); |
38 | 0 | for ( int i = listeners.length-2; i>=0; i-=2 ) { |
39 | 0 | if ( listeners[i]==ItemListener.class ) { |
40 | 0 | ((ItemListener)listeners[i+1]).itemStateChanged(e); |
41 | } | |
42 | } | |
43 | 0 | } |
44 | } |
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