CreateGuideCommand.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform 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 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.ui.commands;

import org.eclipse.gef.commands.Command;
import org.whole.lang.ui.ruler.WholeGuide;
import org.whole.lang.ui.ruler.WholeRuler;

/**
 * @author Riccardo Solmi
 */
public class CreateGuideCommand extends Command implements ILegacyCommand {
	private WholeGuide guide;
	private WholeRuler parent;
	private int position;

	public CreateGuideCommand(WholeRuler parent, int position) {
		super("Create guide");
		this.parent = parent;
		this.position = position;
	}

	public boolean canUndo() {
		return true;
	}

	public void execute() {
		if (guide == null)
			guide = new WholeGuide(!parent.isHorizontal());
		guide.setPosition(position);
		parent.addGuide(guide);
	}

	public void undo() {
		parent.removeGuide(guide);
	}

}