RootComponentEditPolicy.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 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.gef.editpolicies;

import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gef.requests.GroupRequest;

/**
 * The <i>root</i> component cannot be removed from its parent. This EditPolicy is
 * typically installed on the Viewer's {@link org.eclipse.gef.EditPartViewer#getContents()
 * contents}.
 */
public class RootComponentEditPolicy
	extends ComponentEditPolicy
{

/**
 * Overridden to prevent the host from being deleted.
 * @see org.eclipse.gef.editpolicies.ComponentEditPolicy#createDeleteCommand(GroupRequest)
 */
protected Command createDeleteCommand(GroupRequest request) {
	return UnexecutableCommand.INSTANCE;
}

}