taverna-workbench-graph-model/src/main/java/net/sf/taverna/t2/workbench/models/graph/GraphColorManager.java

/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester
 *
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 *
 *  This program 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 program 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 program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package net.sf.taverna.t2.workbench.models.graph;

import java.awt.Color;
import java.lang.reflect.InvocationTargetException;

import net.sf.taverna.t2.workbench.configuration.colour.ColourManager;

import org.apache.commons.beanutils.PropertyUtils;

import uk.org.taverna.scufl2.api.activity.Activity;

/**
 * Manages the colour of elements in a graph.
 *
 * @author David Withers
 * @author Start Owen
 */
public class GraphColorManager {
	private static final String BEANSHELL = "http://ns.taverna.org.uk/2010/activity/beanshell";
	private static final String LOCALWORKER = "http://ns.taverna.org.uk/2010/activity/localworker";

	private static Color[] subGraphFillColors = new Color[] {
			Color.decode("#ffffff"), Color.decode("#f0f8ff"),
			Color.decode("#faebd7"), Color.decode("#f5f5dc") };

	/**
	 * Returns the colour associated with the Activity.
	 *
	 * For unknown activities Color.WHITE is returned.
	 *
	 * For {@link LocalworkerActivity} which have been user configured use the
	 * BeanshellActivity colour
	 *
	 * @return the colour associated with the Activity
	 */
	public static Color getFillColor(Activity activity, ColourManager colourManager) {
		try {
			if (activity.getType().equals(LOCALWORKER)) {
				// To avoid compile time dependency - read isAltered property as bean
				if (Boolean.TRUE.equals(PropertyUtils.getProperty(activity, "altered"))) {
					Color colour = colourManager.getPreferredColour(BEANSHELL);
					return colour;
				}
			}
		} catch (IllegalAccessException | InvocationTargetException
				| NoSuchMethodException e) {
		}
		Color colour = colourManager.getPreferredColour(activity.getType().toASCIIString());
		return colour;
	}

	public static Color getSubGraphFillColor(int depth) {
		return subGraphFillColors[depth % subGraphFillColors.length];
	}
}