/*****************************************************************************
* Copyright (c) 2011 CEA LIST.
*
*
* 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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.views.modelexplorer.handler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
/**
* Handler for the Undo Action
*
*
*
*/
public class UndoHandler extends AbstractModelExplorerHandler {
/**
*
* @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
*
* @param event
* @return
* @throws ExecutionException
*/
public Object execute(ExecutionEvent event) throws ExecutionException {
getEditingDomain().getCommandStack().undo();
return null;
}
/**
*
* @see org.eclipse.core.commands.AbstractHandler#isEnabled()
*
* @return
*/
@Override
public boolean isEnabled() {
return getEditingDomain().getCommandStack().canUndo();
}
}