| /******************************************************************************* |
| * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) 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: |
| * Soyatec - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.xwt.tools.ui.designer.commands; |
| |
| import org.eclipse.gef.commands.Command; |
| |
| /** |
| * This is a No Operation command. There are times when a command must be returned and none being returned is considered an error. This can be used in those situations where nothing is to be be done. |
| * |
| * Use the INSTANCE static field for all usages. There is no need for more than one. |
| */ |
| |
| public class NoOpCommand extends Command { |
| |
| public static final NoOpCommand INSTANCE = new NoOpCommand(); |
| |
| private NoOpCommand() { |
| } |
| |
| public boolean canExecute() { |
| return true; |
| } |
| |
| public void execute() { |
| } |
| |
| public void redo() { |
| } |
| |
| public boolean canUndo() { |
| return true; |
| } |
| |
| public void undo() { |
| } |
| |
| } |
