org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/util/StyleUtil.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2013, 2013 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.fmc.blockdiagram.editor.util;

import java.util.Collection;

import org.eclipse.fmc.blockdiagram.editor.BlockDiagramMessages;
import org.eclipse.graphiti.mm.algorithms.styles.Style;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.graphiti.services.IGaService;
import org.eclipse.graphiti.util.ColorConstant;
import org.eclipse.graphiti.util.IColorConstant;

/**
 * 
 * @author Rainer Thome
 *
 */
public class StyleUtil {

	private static final IColorConstant SHAPE_FOREGOUND = new ColorConstant(0,
			0, 0);
	private static final IColorConstant SHAPE_BACKGROUND = new ColorConstant(
			255, 255, 255);
	private static String DEFAULT_FONT = BlockDiagramMessages.FMCAddFeature_FontType;

	public static final String SHAPE = "Shape";
	public static final String CONNECTION = "Connection";

	public static Style getStyle(Diagram d) {
		return getStyle(d, SHAPE);
	}

	public static Style getStyle(Diagram d, String styleId) {
		Style style = findStyle(d, styleId);

		IGaService gaService = Graphiti.getGaService();
		if (style == null) {
			style = gaService.createStyle(d, styleId);
			if (SHAPE.equals(styleId)) {
				style.setLineWidth(3);
				style.setForeground(gaService.manageColor(d, SHAPE_FOREGOUND));
				style.setBackground(gaService.manageColor(d, SHAPE_BACKGROUND));
				style.setFont(gaService.manageFont(d, DEFAULT_FONT, 10, false,
						false));
			} else if (CONNECTION.equals(styleId)) {
				style.setFont(gaService.manageFont(d, DEFAULT_FONT, 8, false,
						false));
			}
		}
		return style;
	}

	public static Style findStyle(Diagram d, String styleId) {
		Collection<Style> styles = d.getStyles();
		if (styles != null) {
			for (Style style : styles) {
				if (styleId.equals(style.getId())) {
					return style;
				}
			}
		}
		return null;
	}

}