/*******************************************************************************
* Copyright (c) 2002, 2008 Innoopract Informationssysteme GmbH.
* 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:
* Innoopract Informationssysteme GmbH - initial API and implementation
******************************************************************************/
package org.eclipse.swt.events;
import org.eclipse.swt.internal.SWTEventListener;
/**
* Classes which implement this interface provide methods that deal with the
* expanding and collapsing of tree branches.
* <p>
* After creating an instance of a class that implements this interface it can
* be added to a tree control using the <code>addTreeListener</code> method and
* removed using the <code>removeTreeListener</code> method. When a branch of
* the tree is expanded or collapsed, the appropriate method will be invoked.
* </p>
*
* @see TreeAdapter
* @see TreeEvent
*/
public interface TreeListener extends SWTEventListener {
/**
* Sent when a tree branch is collapsed.
*
* @param e an event containing information about the tree operation
*/
void treeCollapsed( TreeEvent e );
/**
* Sent when a tree branch is expanded.
*
* @param e an event containing information about the tree operation
*/
void treeExpanded( TreeEvent e );
}