RevertAction.java

/*******************************************************************************
 * Copyright (c) 2010-2015 Henshin developers. 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:
 *     TU Berlin, University of Luxembourg, SES S.A.
 *******************************************************************************/
package de.tub.tfs.muvitor.actions;

import org.eclipse.gef.ui.actions.EditorPartAction;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.ui.actions.ActionFactory;

import de.tub.tfs.muvitor.ui.MuvitorTreeEditor;

/**
 * An action which reverts to the last saved version of the
 * {@link MuvitorTreeEditor}'s model.
 * 
 * @author "Tony Modica"
 */
public class RevertAction extends EditorPartAction {
	
	public static final String ID = ActionFactory.REVERT.getId();
	
	/**
	 * Constructor
	 */
	public RevertAction(final MuvitorTreeEditor part) {
		super(part);
		setText("Revert");
		setToolTipText("Revert to last saved version");
		setId(ID);
	}
	
	/**
	 * 
	 */
	@Override
	public void run() {
		final MessageBox box = new MessageBox(getEditorPart().getSite().getShell(), SWT.OK
				| SWT.CANCEL | SWT.ICON_WARNING);
		box.setText("Confirm revert");
		box.setMessage("Do you really want to discard all changes to the model and restore the state of when it has been saved the last time?");
		final int result = box.open();
		if (result == SWT.OK) {
			((MuvitorTreeEditor) getEditorPart()).revertToLastSaved();
		}
	}
	
	@Override
	protected boolean calculateEnabled() {
		return getEditorPart().isDirty();
	}
}