/*******************************************************************************
 * Copyright 2005, CHISEL Group, University of Victoria, Victoria, BC, Canada.
 * 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: The Chisel Group, University of Victoria
 *******************************************************************************/
package org.eclipse.zest.layouts.algorithms;

import org.eclipse.zest.layouts.LayoutStyles;

/**
 * @version  2.0
 * @author   Casey Best and Rob Lintern (version 1.0 by Rob Lintern)
 */
public class VerticalLayoutAlgorithm extends GridLayoutAlgorithm {

	/**
	 * Veertical Layout Algorithm constructor with no styles.
	 *
	 */
	public VerticalLayoutAlgorithm() {
		this(LayoutStyles.NONE);
	}

	public VerticalLayoutAlgorithm(int styles) {
		super(styles);
	}

	/**
	 * Calculates and returns an array containing the number of columns, followed by the number of rows
	 */
	protected int[] calculateNumberOfRowsAndCols(int numChildren, double boundX, double boundY, double boundWidth, double boundHeight) {
		int cols = 1;
		int rows = numChildren;
		int[] result = { cols, rows };
		return result;
	}

	protected boolean isValidConfiguration(boolean asynchronous, boolean continueous) {
		if (asynchronous && continueous)
			return false;
		else if (asynchronous && !continueous)
			return true;
		else if (!asynchronous && continueous)
			return false;
		else if (!asynchronous && !continueous)
			return true;

		return false;
	}
}
