/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.pi.util;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.graphics.RGB;

import org.eclipse.swt.widgets.Display;

/**

 * Class for managing all Color resource for PI

 * 

 */

	private static CacheMap<RGB, Color> palette = new CacheMap<RGB, Color>();

	private static ColorPalette colorPalette = null;

	private ColorPalette() {

		// private so we can't new ColorPalette

		// user getInstance() to access this class

	}

	public static ColorPalette getInstance() {

		if (colorPalette == null)

	    {

	    	colorPalette = new ColorPalette();

	    }

	    return colorPalette;		

	}

	public static void add(RGB rgb) {

		synchronized(palette) {

			palette.put(new RGB(rgb.red, rgb.green, rgb.blue), new Color(Display.getCurrent(), rgb));

		}

	}

	public static Color getColor(RGB rgb) {

		synchronized(palette) {

			if (palette.get(rgb) == null) {

				add(rgb);

			}

			return (Color) palette.get(rgb);

		}

	}

	public static int size() {

		return palette.size();

	}

	public static void dispose() {

		// CacheMap.dispose() is going to free up resource

		palette.dispose();

	}

	protected void finalize() {

		palette.dispose();

	}

}