LabelMoveCommand.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.gd.common.command;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.gef.commands.Command;
import org.jbpm.gd.common.notation.Label;

public class LabelMoveCommand extends Command {

	Label label = null;
	Point location = null;
	IFigure parent = null;
	Point oldOffset = new Point();

	public LabelMoveCommand(Label label, IFigure parent,
			Point location) {
		this.label = label;
		this.parent = parent;
		this.location = location;
	}

	public void execute() {
		oldOffset = label.getOffset();
		Point newOffset = label.getOffset().getCopy();
		parent.translateToAbsolute(newOffset);
		newOffset.translate(location);
		parent.translateToRelative(newOffset);
		label.setOffset(newOffset);
	}

	public void redo() {
		execute();
	}

	public void undo() {
		label.setOffset(oldOffset);
	}
}