Copyright (c) 2004, 2015 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2004, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.commands;

An instance of this interface can be used by clients to receive notification
of changes to one or more instances of IHandler.

This interface may be implemented by clients.

See Also:
IHandler.addHandlerListener(IHandlerListener)
IHandler.removeHandlerListener(IHandlerListener)
Since:
3.1/**
 * An instance of this interface can be used by clients to receive notification
 * of changes to one or more instances of <code>IHandler</code>.
 * <p>
 * This interface may be implemented by clients.
 * </p>
 *
 * @since 3.1
 * @see IHandler#addHandlerListener(IHandlerListener)
 * @see IHandler#removeHandlerListener(IHandlerListener)
 */
public interface IHandlerListener {

	
Notifies that one or more properties of an instance of
IHandler have changed. Specific details are described in
the HandlerEvent.
Params:
handlerEvent – 
           the handler event. Guaranteed not to be null./**
	 * Notifies that one or more properties of an instance of
	 * <code>IHandler</code> have changed. Specific details are described in
	 * the <code>HandlerEvent</code>.
	 *
	 * @param handlerEvent
	 *            the handler event. Guaranteed not to be <code>null</code>.
	 */
	void handlerChanged(HandlerEvent handlerEvent);
}