InputMap


1   /*
2      SwingWT
3      Copyright(c)2003-2004 Daniel Naab
4   
5      For more information on distributing and using this program, please
6      see the accompanying "COPYING" file.
7   
8      Contact me by electronic mail: dannaab@users.sourceforge.net
9   
10     $Log: InputMap.java,v $
11     Revision 1.2  2004/04/16 22:45:50  dannaab
12     Add copyright msg
13  
14  */
15  
16  package swingwtx.swing;
17  
18  import java.util.HashMap  ;
19  
20  /**
21   * InputMap implementation... used by JComponent to define behavior on state changes.
22   *
23   * @author  Naab
24   * @version %I%, %G%
25   */
26  public class InputMap
27  {
28      private HashMap   hashMap = new HashMap  ();
29      private InputMap parent = null;
30  
31      public void setParent(InputMap parent) { this.parent = parent; }
32      public InputMap getParent() { return parent; }
33  
34      public Object   get(KeyStroke keyStroke)
35      {
36          Object   value = null;
37  
38          if (hashMap.containsKey(value))
39              value = hashMap.get(keyStroke);
40          else if (parent != null)
41              value = parent.get(keyStroke);
42  
43          return value;
44      }
45  
46      public void put(KeyStroke keyStroke, Object   actionMapKey)
47      {
48          if (keyStroke != null)
49          {
50              if (actionMapKey == null) remove(keyStroke);
51              else hashMap.put(keyStroke, actionMapKey);
52          }
53      }
54  
55      public void remove(KeyStroke key) { hashMap.remove(key); }
56      public void clear() { hashMap.clear(); }
57      public KeyStroke[] keys() { return (KeyStroke[]) hashMap.keySet().toArray(new KeyStroke[0]); }
58      public int size() { return hashMap.size(); }
59  
60      // Package protected helpers for allKeys() method
61      HashMap   getHashMap() { return hashMap; }
62      HashMap   allKeyValues()
63      {
64          HashMap   keyValues = (HashMap  ) hashMap.clone();
65          if (parent != null) keyValues.putAll(parent.allKeyValues());
66          return keyValues;
67      }
68  
69      public KeyStroke[] allKeys()
70      {
71          return (KeyStroke[]) allKeyValues().keySet().toArray(new KeyStroke[0]);
72      }
73  }
74
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