1/* 2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package javax.sound.midi; 27 28import java.util.EventListener; 29 30/** 31 * The {@code ControllerEventListener} interface should be implemented by 32 * classes whose instances need to be notified when a {@link Sequencer} has 33 * processed a requested type of MIDI control-change event. To register a 34 * {@code ControllerEventListener} object to receive such notifications, invoke 35 * the 36 * {@link Sequencer#addControllerEventListener(ControllerEventListener, int[]) 37 * addControllerEventListener} method of {@code Sequencer}, specifying the types 38 * of MIDI controllers about which you are interested in getting control-change 39 * notifications. 40 * 41 * @author Kara Kytle 42 * @see MidiChannel#controlChange(int, int) 43 */ 44public interface ControllerEventListener extends EventListener { 45 46 /** 47 * Invoked when a {@link Sequencer} has encountered and processed a 48 * control-change event of interest to this listener. The event passed in is 49 * a {@code ShortMessage} whose first data byte indicates the controller 50 * number and whose second data byte is the value to which the controller 51 * was set. 52 * 53 * @param event the control-change event that the sequencer encountered in 54 * the sequence it is processing 55 * @see Sequencer#addControllerEventListener(ControllerEventListener, int[]) 56 * @see MidiChannel#controlChange(int, int) 57 * @see ShortMessage#getData1 58 * @see ShortMessage#getData2 59 */ 60 void controlChange(ShortMessage event); 61} 62