CBAction


1   package com.ca.commons.cbutil;
2   
3   import javax.swing.*;
4   import java.awt.event.ActionEvent  ;
5   import java.beans.PropertyChangeListener  ;
6   
7   /**
8    * Apparently it is better to use key bindings rather than adding a KeyListener...
9    * "for reacting in a special way to particular keys, you usually should use key
10   * bindings instead of a key listener".
11   * This class lets the user set the key as an int.  If a key is pressed and it
12   * matches the assigned int, a check is done for if it is an escape or enter key.
13   * (27 or 10).  If escape, the doCancel method is called.  If enter, the doClick
14   * method is called.
15   * Bug 4646.
16   *
17   * @author Trudi.
18   */
19  public abstract class CBAction
20          implements Action
21  {
22      /**
23       * Represents the escape key.
24       */
25      public static final int ESCAPE = 27;
26  
27      /**
28       * Represents the enter key.
29       */
30      public static final int ENTER = 10;
31  
32      /**
33       * User sets the int representation of the key they want to listen for.
34       */
35      private int key = 0;
36  
37      /**
38       * Whether the listener is enabled.
39       */
40      private boolean enabled = true;
41  
42      /**
43       * Empty constructor.
44       */
45      public CBAction()
46      {
47      }
48  
49      /**
50       * Constructor that sets the key that is Action is associated with.
51       *
52       * @param key
53       */
54      public CBAction(int key)
55      {
56          this.key = key;
57      }
58  
59      /**
60       * Returns the key.
61       *
62       * @return
63       */
64      public int getKey()
65      {
66          return key;
67      }
68  
69      /**
70       * Sets the key.
71       *
72       * @param key an int representation of the keyboard key.
73       */
74      public void setKey(int key)
75      {
76          this.key = key;
77      }
78  
79      /**
80       * Subclasses to implement this method.
81       *
82       * @param e
83       */
84      public abstract void actionPerformed(ActionEvent   e);
85  
86      //TE: implemented methods...
87      public void addPropertyChangeListener(PropertyChangeListener   listener)
88      {
89      }
90  
91      public Object   getValue(String   key)
92      {
93          return key;
94      }
95  
96      public boolean isEnabled()
97      {
98          return enabled;
99      }
100 
101     public void putValue(String   key, Object   value)
102     {
103     }
104 
105     public void removePropertyChangeListener(PropertyChangeListener   listener)
106     {
107     }
108 
109     public void setEnabled(boolean b)
110     {
111         enabled = b;
112     }
113 }
114
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags