toolchain/gcc/libjava/javax/swing/Timer.java

   1 /* Timer.java --
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.swing;
  40
  41 import java.awt.event.ActionEvent;
  42 import java.awt.event.ActionListener;
  43 import java.io.Serializable;
  44 import java.util.EventListener;
  45 import java.util.Vector;
  46 import javax.swing.event.EventListenerList;
  47
  48 public class Timer implements Serializable
  49 {
  50   protected EventListenerList listenerList = new EventListenerList();
  51
  52   int ticks;
  53   static boolean verbose;
  54   boolean running;
  55   boolean repeat_ticks = true;
  56   long interval, init_delay;
  57
  58   class Waker extends Thread
  59   {
  60     public void run()
  61     {
  62       running = true;
  63       try {
  64         sleep(init_delay);
  65
  66         while (running)
  67           {
  68             sleep(interval);
  69
  70             if (verbose)
  71               {
  72                 System.out.println("javax.swing.Timer -> clocktick");
  73               }
  74
  75             ticks++;
  76             fireActionPerformed();
  77
  78             if (! repeat_ticks)
  79               break;
  80           }
  81         running = false;
  82       } catch (Exception e) {
  83         System.out.println("swing.Timer::" + e);
  84       }
  85     }
  86   }
  87
  88   public void addActionListener(ActionListener listener)
  89   {
  90     listenerList.add (ActionListener.class, listener);
  91   }
  92
  93   public void removeActionListener(ActionListener listener)
  94   {
  95     listenerList.remove (ActionListener.class, listener);
  96   }
  97
  98   /**
  99    * @since 1.3
 100    */
 101   public EventListener[] getListeners (Class listenerType)
 102   {
 103     return listenerList.getListeners (listenerType);
 104   }
 105
 106   /**
 107    * @since 1.4
 108    */
 109   public ActionListener[] getActionListeners ()
 110   {
 111     return (ActionListener[]) listenerList.getListeners (ActionListener.class);
 112   }
 113
 114   protected void fireActionPerformed (ActionEvent event)
 115   {
 116     ActionListener[] listeners = getActionListeners();
 117
 118     for (int i = 0; i < listeners.length; i++)
 119       {
 120         listeners [i].actionPerformed (event);
 121       }
 122   }
 123
 124   void fireActionPerformed ()
 125   {
 126     fireActionPerformed (new ActionEvent (this, ticks, "Timer"));
 127   }
 128
 129   public static void setLogTimers(boolean flag)
 130   {
 131     verbose = flag;
 132   }
 133
 134   public static boolean getLogTimers()
 135   {
 136     return verbose;
 137   }
 138
 139
 140   public void setDelay(int delay)
 141   {
 142     interval = delay;
 143   }
 144
 145   public int getDelay()
 146   {
 147     return (int)interval;
 148   }
 149
 150
 151   public void setInitialDelay(int initialDelay)
 152   {
 153     init_delay = initialDelay;
 154   }
 155
 156   public void setRepeats(boolean flag)
 157   {
 158     repeat_ticks = flag;
 159   }
 160
 161   boolean isRunning()
 162   {
 163     return running;
 164   }
 165
 166   void start()
 167   {
 168     if (isRunning())
 169       {
 170         System.err.println("attempt to start a running timer");
 171         return;
 172       }
 173     new Waker().start();
 174   }
 175
 176   void stop()
 177   {
 178     running = false;
 179   }
 180 }