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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package javax.sound.midi;

import java.util.EventListener;

/**

 * The <code>ControllerEventListener</code> interface should be implemented

 * by classes whose instances need to be notified when a <code>Sequencer</code>

 * has processed a requested type of MIDI control-change event.

 * To register a <code>ControllerEventListener</code> object to receive such

 * notifications, invoke the

 * {@link Sequencer#addControllerEventListener(ControllerEventListener, int[])

 * addControllerEventListener} method of <code>Sequencer</code>,

 * specifying the types of MIDI controllers about which you are interested in

 * getting control-change notifications.

 *

 * @see MidiChannel#controlChange(int, int)

 *

 * @author Kara Kytle

 */

public interface ControllerEventListener extends EventListener {

    /**

     * Invoked when a <code>Sequencer</code> has encountered and processed

     * a control-change event of interest to this listener.  The event passed

     * in is a <code>ShortMessage</code> whose first data byte indicates

     * the controller number and whose second data byte is the value to which

     * the controller was set.

     *

     * @param event the control-change event that the sequencer encountered in

     * the sequence it is processing

     *

     * @see Sequencer#addControllerEventListener(ControllerEventListener, int[])

     * @see MidiChannel#controlChange(int, int)

     * @see ShortMessage#getData1

     * @see ShortMessage#getData2

     */

    public void controlChange(ShortMessage event);

}