blob: 615e58730eab84dcf69278389200d04a950aa1ad (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*******************************************************************************
* Copyright (c) 2005, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.action;
import org.eclipse.core.commands.common.EventManager;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
/**
* <p>
* Some common functionality to share between implementations of
* <code>IAction</code>. This functionality deals with the property change
* event mechanism.
* </p>
* <p>
* Clients may neither instantiate nor extend this class.
* </p>
*
* @since 3.2
*/
public abstract class AbstractAction extends EventManager implements IAction {
@Override
public void addPropertyChangeListener(final IPropertyChangeListener listener) {
addListenerObject(listener);
}
/**
* Notifies any property change listeners that a property has changed. Only
* listeners registered at the time this method is called are notified.
*
* @param event
* the property change event
*
* @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(PropertyChangeEvent)
*/
protected final void firePropertyChange(final PropertyChangeEvent event) {
final Object[] list = getListeners();
for (int i = 0; i < list.length; ++i) {
((IPropertyChangeListener) list[i]).propertyChange(event);
}
}
/**
* Notifies any property change listeners that a property has changed. Only
* listeners registered at the time this method is called are notified. This
* method avoids creating an event object if there are no listeners
* registered, but calls
* <code>firePropertyChange(PropertyChangeEvent)</code> if there are.
*
* @param propertyName
* the name of the property that has changed
* @param oldValue
* the old value of the property, or <code>null</code> if none
* @param newValue
* the new value of the property, or <code>null</code> if none
*
* @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(PropertyChangeEvent)
*/
protected final void firePropertyChange(final String propertyName,
final Object oldValue, final Object newValue) {
if (isListenerAttached()) {
firePropertyChange(new PropertyChangeEvent(this, propertyName,
oldValue, newValue));
}
}
@Override
public void removePropertyChangeListener(
final IPropertyChangeListener listener) {
removeListenerObject(listener);
}
}
|
