| /******************************************************************************* |
| * Copyright (c) 2005, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.core.commands; |
| |
| /** |
| * <p> |
| * A listener to changes in some state. |
| * </p> |
| * <p> |
| * Clients may implement, but must not extend this interface. |
| * </p> |
| * |
| * @since 3.2 |
| */ |
| public interface IStateListener { |
| |
| /** |
| * Handles a change to the value in some state. |
| * |
| * @param state |
| * The state that has changed; never <code>null</code>. The |
| * value for this state has been updated to the new value. |
| * @param oldValue |
| * The old value; may be anything. |
| */ |
| public void handleStateChange(State state, Object oldValue); |
| } |
