ControllerEventListener


1   /*
2    * @(#)ControllerEventListener.java 1.15 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package javax.sound.midi;
9   
10  import java.util.EventListener  ;
11  
12  
13  /**
14   * The <code>ControllerEventListener</code> interface should be implemented
15   * by classes whose instances need to be notified when a <code>Sequencer</code>
16   * has processed a requested type of MIDI control-change event.
17   * To register a <code>ControllerEventListener</code> object to receive such
18   * notifications, invoke the
19   * {@link Sequencer#addControllerEventListener(ControllerEventListener, int[])
20   * addControllerEventListener} method of <code>Sequencer</code>,
21   * specifying the types of MIDI controllers about which you are interested in
22   * getting control-change notifications.
23   *
24   * @see MidiChannel#controlChange(int, int)
25   *
26   * @version 1.15, 03/12/19
27   * @author Kara Kytle
28   */
29  public interface ControllerEventListener extends EventListener   {
30      
31      /**
32       * Invoked when a <code>Sequencer</code> has encountered and processed
33       * a control-change event of interest to this listener.  The event passed
34       * in is a <code>ShortMessage</code> whose first data byte indicates
35       * the controller number and whose second data byte is the value to which
36       * the controller was set.
37       *
38       * @param event the control-change event that the sequencer encountered in
39       * the sequence it is processing
40       *
41       * @see Sequencer#addControllerEventListener(ControllerEventListener, int[])
42       * @see MidiChannel#controlChange(int, int)
43       * @see ShortMessage#getData1
44       * @see ShortMessage#getData2
45       */
46      public void controlChange(ShortMessage   event);
47  }
48
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