| /****************************************************************************** |
| * Copyright (c) 2010 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| ****************************************************************************/ |
| |
| package org.eclipse.gmf.runtime.draw2d.ui.graphics; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.gmf.runtime.draw2d.ui.figures.FigureUtilities; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.RGB; |
| |
| /** |
| * Manages color resources. |
| * |
| * @author cmahoney, ldamus |
| * @since 1.4 |
| */ |
| public class ColorRegistry { |
| |
| /** |
| * Singleton instance for the color registry. |
| */ |
| private static ColorRegistry singletonInstance = new ColorRegistry(); |
| |
| /** |
| * Return singleton instance of the color registry. |
| * |
| * @return the color registry |
| */ |
| public static ColorRegistry getInstance() { |
| return singletonInstance; |
| } |
| |
| // HashMap that holds onto Color instances |
| private final static Map colorRegistry = new HashMap(); |
| |
| /** |
| * Private constructor. |
| */ |
| private ColorRegistry() { |
| super(); |
| } |
| |
| /** |
| * Returns the Color based on the id. If the color does not exist in the |
| * cache, creates a new one and caches. |
| * |
| * @param id - |
| * the integer representation of a color |
| * @return Color |
| */ |
| public Color getColor(Integer id) { |
| Object value = colorRegistry.get(id); |
| if (value != null) { |
| return (Color) value; |
| } |
| Color newColor = FigureUtilities.integerToColor(id); |
| colorRegistry.put(id, newColor); |
| return newColor; |
| } |
| |
| /** |
| * Returns the Color based on the RGB. If the color does not exist in the |
| * cache, creates a new one and caches. |
| * |
| * @param RGB |
| * @return Color |
| */ |
| public Color getColor(RGB rgb) { |
| Integer colorID = FigureUtilities.RGBToInteger(rgb); |
| return getColor(colorID); |
| } |
| |
| } |