/*******************************************************************************
* Copyright (c) 2000, 2017 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.swt.events;
/**
* This adapter class provides default implementations for the
* methods described by the TreeListener
interface.
*
* Classes that wish to deal with TreeEvent
s can
* extend this class and override only the methods which they are
* interested in.
*
* An alternative to this class are the static helper methods * {@link TreeListener#treeCollapsedAdapter(java.util.function.Consumer)} * and * {@link TreeListener#treeExpandedAdapter(java.util.function.Consumer)}, * which accept a lambda expression or a method reference that implements the event consumer. *
* * @see TreeListener * @see TreeEvent * @see Sample code and further information */ public abstract class TreeAdapter implements TreeListener { /** * Sent when a tree branch is collapsed. * The default behavior is to do nothing. * * @param e an event containing information about the tree operation */ @Override public void treeCollapsed(TreeEvent e) { } /** * Sent when a tree branch is expanded. * The default behavior is to do nothing. * * @param e an event containing information about the tree operation */ @Override public void treeExpanded(TreeEvent e) { } }