/*******************************************************************************
* Copyright (c) 2000, 2007 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.ui;
import java.util.EventListener;
import org.eclipse.jface.viewers.ISelection;
/**
* Interface for listening to selection changes.
* <p>
* This interface may be implemented by clients.
* </p>
*
* @see ISelectionService#addSelectionListener(ISelectionListener)
* @see ISelectionService#addSelectionListener(String, ISelectionListener)
* @see org.eclipse.ui.INullSelectionListener
*/
public interface ISelectionListener extends EventListener {
/**
* Notifies this listener that the selection has changed.
* <p>
* This method is called when the selection changes from one to a
* <code>non-null</code> value, but not when the selection changes to
* <code>null</code>. If there is a requirement to be notified in the latter
* scenario, implement <code>INullSelectionListener</code>. The event will
* be posted through this method.
* </p>
*
* @param part the workbench part containing the selection
* @param selection the current selection. This may be <code>null</code>
* if <code>INullSelectionListener</code> is implemented.
*/
public void selectionChanged(IWorkbenchPart part, ISelection selection);
}