/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javafx.beans.value; /** * A {@code ChangeListener} is notified whenever the value of an * {@link ObservableValue} changes. It can be registered and unregistered with * {@link ObservableValue#addListener(ChangeListener)} respectively * {@link ObservableValue#removeListener(ChangeListener)} *
* For an in-depth explanation of change events and how they differ from * invalidation events, see the documentation of {@code ObservableValue}. *
* The same instance of {@code ChangeListener} can be registered to listen to
* multiple {@code ObservableValues}.
*
* @see ObservableValue
*
*
* @since JavaFX 2.0
*/
@FunctionalInterface
public interface ChangeListener
* In general, it is considered bad practice to modify the observed value in
* this method.
*
* @param observable
* The {@code ObservableValue} which value changed
* @param oldValue
* The old value
* @param newValue
* The new value
*/
void changed(ObservableValue extends T> observable, T oldValue, T newValue);
}