/*
 * Copyright (c) 2005-2010 Flamingo Kirill Grouchnikov. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *  o Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 *     
 *  o Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution. 
 *     
 *  o Neither the name of Flamingo Kirill Grouchnikov nor the names of 
 *    its contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission. 
 *     
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
package org.pushingpixels.flamingo.api.common.icon;

import java.awt.*;
import java.util.Map;

import org.pushingpixels.flamingo.api.common.AsynchronousLoadListener;
import org.pushingpixels.flamingo.api.common.AsynchronousLoading;

/**
 * Implementation of the {@link ResizableIcon} that allows switching the icon
 * painting at runtime. This class can be used as a delegate in the
 * {@link DecoratedResizableIcon} where the "base" icon is changed at runtime
 * without the need to recompute all the decorators.
 * 
 * @param <T>
 *            enumeration key into the deck
 * @author Kenneth Flynn flynnk@darkcornersoftware.com.
 */
public class IconDeckResizableIcon<T> implements ResizableIcon,
		AsynchronousLoading {
	/**
	 * Currently shown icon.
	 */
	private ResizableIcon currentIcon;

	/**
	 * The icon deck.
	 */
	private final Map<T, ? extends ResizableIcon> iconDeck;

	/**
	 * Creates the icon deck.
	 * 
	 * @param iconDeck
	 *            Icon deck.
	 */
	public IconDeckResizableIcon(Map<T, ? extends ResizableIcon> iconDeck) {
		if (iconDeck.isEmpty())
			throw new IllegalArgumentException(
					"Icon deck is empty; must have at least one icon");
		this.iconDeck = iconDeck;
		this.currentIcon = iconDeck.values().iterator().next();
	}

	/**
	 * Sets the currently shown icon.
	 * 
	 * @param key
	 *            Icon key.
	 */
	public void setIcon(T key) {
		this.currentIcon = iconDeck.get(key);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.jvnet.flamingo.common.icon.ResizableIcon#setDimension(java.awt.Dimension
	 * )
	 */
	public void setDimension(Dimension dim) {
		for (ResizableIcon icon : iconDeck.values()) {
			int currH = icon.getIconHeight();
			int currW = icon.getIconWidth();
			if ((currH != dim.height) || (currW != dim.width))
				icon.setDimension(dim);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.Icon#getIconHeight()
	 */
	public int getIconHeight() {
		return currentIcon.getIconHeight();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.Icon#getIconWidth()
	 */
	public int getIconWidth() {
		return currentIcon.getIconWidth();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.Icon#paintIcon(java.awt.Component, java.awt.Graphics,
	 * int, int)
	 */
	public void paintIcon(Component c, Graphics g, int x, int y) {
		currentIcon.paintIcon(c, g, x, y);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.jvnet.flamingo.common.AsynchronousLoading#addAsynchronousLoadListener
	 * (org.jvnet.flamingo.common.AsynchronousLoadListener)
	 */
	public void addAsynchronousLoadListener(AsynchronousLoadListener l) {
		for (ResizableIcon icon : iconDeck.values()) {
			if (icon instanceof AsynchronousLoading)
				((AsynchronousLoading) icon).addAsynchronousLoadListener(l);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.jvnet.flamingo.common.AsynchronousLoading#isLoading()
	 */
	public boolean isLoading() {
		for (ResizableIcon icon : iconDeck.values()) {
			if (icon instanceof AsynchronousLoading) {
				if (((AsynchronousLoading) icon).isLoading())
					return true;
			}
		}

		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.jvnet.flamingo.common.AsynchronousLoading#removeAsynchronousLoadListener
	 * (org.jvnet.flamingo.common.AsynchronousLoadListener)
	 */
	public void removeAsynchronousLoadListener(AsynchronousLoadListener l) {
		for (ResizableIcon icon : iconDeck.values()) {
			if (icon instanceof AsynchronousLoading)
				((AsynchronousLoading) icon).removeAsynchronousLoadListener(l);
		}
	}
}
