DigitalClock


1   /* $Id$
2    *
3    * Copyright (c) 1998 Xenonsoft Limited. All Rights Reserved.
4    *
5    * This software is protected by copyright. You are hereby notified from
6    * now by reading this message. This software is also the confidential 
7    * and proprietary information of Xenonsoft Limited.  ("Confidential
8    * Information"). 
9    *
10   * This software is distributed under the Xenonsoft Public end user 
11   * License ("XPeL"), where the machine-readable source code is provided 
12   * under the "Open Source" model.
13   * For more information, please read the file "LICENSE-XPL.txt" 
14   */
15  
16  // DigitalClock.java
17  
18  // Description:
19  //  Installer frame for free installer application
20  //
21  // Author:
22  //  Peter Pilgrim
23  //  Mon Jan 11 23:50:46 GMT 1999
24  //
25  // RCS HEADER 
26  //
27  // $Author$
28  // $Date$
29  // $Source$
30  // $Revision$    $State$    $Locker$
31  //
32  // History
33  // ================================================================================
34  //  $Log$
35  
36  package ixenon.free.swing;
37  
38  import java.awt.*;
39  import java.awt.event.*;
40  import java.util.Date  ;
41  import java.text.*;             // for `SimpleDataFormat' class
42  import javax.swing.*;               // for JLabel
43  import javax.swing.event.*;
44  
45  // import ixenon.free.util.*;           // for ApplicationResources
46  
47  
48  /**
49   * A pseudo Swing component which displays a DigitalClock,
50   * which displays the current time the format `HH:mm:ss AA'
51   * where HH is the hour, MM is the minute, SS is the 
52   * seconds and AA is the AM or PM depending on if the 
53   * 24hr mode or 12 hour mode is set.
54   *
55   * @author Peter Pilgrim Mon Jan 25 22:19:07 GMT 1999
56   * @version $Id$
57   */
58  public class DigitalClock extends JLabel 
59  implements ActionListener
60  {
61      private final static String   MODE12 = "hh:mm:ss aa";
62      private final static String   MODE24 = "HH:mm:ss --";
63      
64      private boolean     mode24Hours;    // true if twenty four hours
65      private Timer       timer;      // The internal timer
66      private SimpleDateFormat    stamper;
67  
68      /**
69       * Constructs the digital clock 
70       */
71      public DigitalClock() 
72      {
73      timer = new Timer( 1000, this );
74      timer.setInitialDelay( 100 );
75      timer.setCoalesce(true);
76      stamper = new SimpleDateFormat( MODE24 );
77      mode24Hours = true;
78      setText( "--:--:-- ---" );
79      // stop();
80      }
81  
82      /** Sets the 24 or 12 hour mode */
83      public void setMode24Hours( boolean mode )
84      {
85      mode24Hours = mode;
86      if (mode24Hours) 
87          stamper = new SimpleDateFormat( MODE24 );
88      else
89          stamper = new SimpleDateFormat( MODE12 );
90      if ( timer.isRunning() )
91          updateClock();
92      }
93      
94      /** if true when digital clock is in 24 hour mode */
95      public boolean isMode24Hours()
96      {
97      return (mode24Hours);
98      }
99      
100     /** Starts the digital clock */
101     public boolean isRunnning() 
102     {
103     return (timer.isRunning() );
104     }
105 
106     /** Starts the digital clock */
107     public void start() 
108     {
109     if ( !timer.isRunning() ) 
110         timer.start();
111     }
112 
113     /** Stops the digital clock */
114     public void stop() 
115     {
116     if ( timer.isRunning() ) 
117         timer.stop();
118     }
119 
120     /** Resets the digital clock */
121     public void reset() 
122     {
123     if ( timer.isRunning() ) {
124         timer.stop();
125         setText( "--:--:-- ---" );
126     }
127     }
128 
129     /** Update the digital clock */
130     protected void updateClock() 
131     {
132     Date   now = new Date  ();
133     String   dtstr = stamper.format( now );
134     setText(dtstr);
135     }
136     
137     public void actionPerformed( ActionEvent e )
138     {
139     Object   src = e.getSource();
140     if ( timer == src ) {
141         updateClock();
142     }
143     }
144     
145 }
146 
147 // fini
148
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