/**
 * Copyright 2010 Jingjing Li.
 *
 * This file is part of jplot2d.
 *
 * jplot2d 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 any later version.
 *
 * jplot2d 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 General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with jplot2d. If not, see .
 */
package org.jplot2d.layout;

import org.jplot2d.util.Insets2D;

/**
 * This constraint defines bounds relative to its contaner's bounds.
 * 
 * @author Jingjing Li
 * 
 */
public class BoundsConstraint {

	private static Insets2D ZERO_INSETS = new Insets2D.Double(0, 0, 0, 0);

	private final Insets2D fixedInsets;

	private final Insets2D elasticInsets;

	/**
	 * Construct a BoundsConstraint with the 4 elastic gaps relative to its
	 * contaner's bounds.
	 * 
	 * @param elasticTop
	 *            the ratio of top gap, relative to its contaner's height
	 * @param elasticLeft
	 *            the ratio of left gap, relative to its contaner's width
	 * @param elasticBottom
	 *            the ratio of bottom gap, relative to its contaner's height
	 * @param elasticRight
	 *            the ratio of right gap, relative to its contaner's width
	 */
	public BoundsConstraint(double elasticTop, double elasticLeft,
			double elasticBottom, double elasticRight) {
		this(ZERO_INSETS, new Insets2D.Double(elasticTop, elasticLeft, elasticBottom,
				elasticRight));
	}

	/**
	 * Construct a BoundsConstraint with the fixed gaps and elastic gaps.
	 * 
	 * @param fixedMargin
	 *            the fixed gap in pt
	 * @param elasticMargin
	 *            the elastic gap ratio.
	 */
	public BoundsConstraint(Insets2D fixedInsets, Insets2D elasticInsets) {
		this.fixedInsets = fixedInsets;
		this.elasticInsets = elasticInsets;
	}

	public Insets2D getFixedInsets() {
		return fixedInsets;
	}

	public Insets2D getElasticInsets() {
		return elasticInsets;
	}
}