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SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is implemented.
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/*******************************************************************************
* Copyright (c) 2000, 2011 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.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.
*
* After creating an instance of a class that implements
* this interface it can be added to a tree control using the
* addTreeListener
method and removed using
* the removeTreeListener
method. When a branch
* of the tree is expanded or collapsed, the appropriate method
* will be invoked.
*
*
* @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
*/
public void treeCollapsed(TreeEvent e);
/**
* Sent when a tree branch is expanded.
*
* @param e an event containing information about the tree operation
*/
public void treeExpanded(TreeEvent e);
}