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Java > Open Source Codes > org > eclipse > ui > internal > preferences > AbstractBooleanListener


1 /*******************************************************************************
2  * Copyright (c) 2004, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.ui.internal.preferences;
12
13 /**
14  * @since 3.1
15  */
16 public abstract class AbstractBooleanListener extends AbstractPropertyListener {
17
18     private IDynamicPropertyMap map;
19     private boolean defaultValue;
20     private String JavaDoc propertyId;
21     
22     public AbstractBooleanListener() {
23     }
24     
25     public void attach(IDynamicPropertyMap map, String JavaDoc propertyId, boolean defaultValue) {
26         this.defaultValue = defaultValue;
27         this.propertyId = propertyId;
28         if (this.map != null) {
29             this.map.removeListener(this);
30         }
31         
32         this.map = map;
33         
34         if (this.map != null) {
35             this.map.addListener(new String JavaDoc[]{propertyId}, this);
36         }
37     }
38
39     /* (non-Javadoc)
40      * @see org.eclipse.ui.internal.preferences.AbstractPropertyListener#update()
41      */
42     protected void update() {
43         handleValue(PropertyUtil.get(map, propertyId, defaultValue));
44     }
45
46     /**
47      * @param b
48      * @since 3.1
49      */
50     protected abstract void handleValue(boolean b);
51    
52     
53 }
54
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