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1 package com.sshtools.ui.awt;
2
3 import java.beans.PropertyChangeEvent  ;
4 import java.beans.PropertyChangeListener ;
5 import java.util.Hashtable ;
6 import java.util.Vector ;
7
8
11 public abstract class AbstractAction
12 implements Action {
13
14 private Hashtable attributes = new Hashtable ();
16 private boolean enabled;
17 private Vector listeners;
18
19
24 public AbstractAction(String name) {
25 super();
26 listeners = new Vector ();
27 putValue(NAME, name);
28 enabled = true;
29 }
30
31
34 public boolean isEnabled() {
35 return enabled;
36 }
37
40 public void setEnabled(boolean enabled) {
41 if(this.enabled != enabled) {
42 boolean oldVal = this.enabled;
43 this.enabled = enabled;
44 firePropertyChanged(this, "enabled", oldVal ? Boolean.TRUE : Boolean.FALSE, enabled ? Boolean.TRUE : Boolean.FALSE); }
46 }
47
48
51 public String getName() {
52 return (String ) getValue(NAME);
53 }
54
55
58 public void putValue(String key, Object value) {
59 Object oldVal = attributes.put(key, value);
60 firePropertyChanged(this, key, oldVal, value);
61 }
62
63
64
71 public Object getValue(String key) {
72 return attributes.get(key);
73 }
74
75
78 public void addPropertyChangeListener(PropertyChangeListener l) {
79 listeners.addElement(l);
80 }
81
82
85 public void removePropertyChangeListener(PropertyChangeListener l) {
86 listeners.removeElement(l);
87 }
88
89
92 private void firePropertyChanged(Object source, String key, Object oldVal, Object newVal) {
93 PropertyChangeEvent evt = null;
94 synchronized(listeners) {
95 for(int i = listeners.size() - 1; i >= 0 ; i-- ) {
96 if(evt == null) {
97 evt = new PropertyChangeEvent (source, key, oldVal, newVal);
98 }
99 ((PropertyChangeListener )listeners.elementAt(i)).propertyChange(evt);
100 }
101 }
102 }
103 }
104 |
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