Source code file content

onyx / src / org / pushingpixels / onyx / details / BigAlbumArt.java

/*
 * Copyright (c) 2009-2010 Onyx 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 Onyx 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.onyx.details;

import java.awt.*;
import java.awt.image.BufferedImage;

import javax.swing.JComponent;

import org.pushingpixels.onyx.OnyxUtils;

/**
 * Shows the big album art for Amazon album items.
 * 
 * @author Kirill Grouchnikov
 */
public class BigAlbumArt extends JComponent {
	/**
	 * The previously displayed album art. Is shown during the fade out stage,
	 * controlled by the timeline launched after the call to
	 * {@link #setAlbumArtImage(BufferedImage)}. The alpha value is controlled
	 * by {@link #oldImageAlpha}.
	 */
	private BufferedImage oldImage;

	/**
	 * The alpha value for {@link #oldImage}.
	 */
	private float oldImageAlpha;

	/**
	 * The album art image for the currently displayed Amazon album item.
	 */
	private BufferedImage image;

	/**
	 * The alpha value for {@link #image}.
	 */
	private float imageAlpha;

	/**
	 * The maximum dimension of the album art.
	 */
	public static final int ALBUM_ART_DIM = 220;

	/**
	 * Album art insets.
	 */
	public static final int INSETS = 3;

	/**
	 * The total dimension required to display album art and track listing side
	 * by side.
	 */
	public static final int TOTAL_DIM = ALBUM_ART_DIM + INSETS * 2;

	/**
	 * Creates a new component that shows album art.
	 */
	public BigAlbumArt() {
		this.setOpaque(false);
		this.imageAlpha = 0.0f;
		this.oldImageAlpha = 0.0f;
	}

	/**
	 * Sets the specified album art for the display.
	 * 
	 * @param image
	 *            Album art.
	 */
	public void setAlbumArtImage(BufferedImage image) {
		this.oldImage = this.image;
		this.oldImageAlpha = this.imageAlpha;

		this.image = image;
		this.imageAlpha = 0.0f;
		float vFactor = (float) ALBUM_ART_DIM / (float) image.getHeight();
		float hFactor = (float) ALBUM_ART_DIM / (float) image.getWidth();
		float factor = Math.min(1.0f, Math.min(vFactor, hFactor));
		if (factor < 1.0f) {
			// scaled to fit available area
			this.image = OnyxUtils.getScaledInstance(image,
					(int) (factor * image.getWidth()), (int) (factor * image
							.getHeight()),
					RenderingHints.VALUE_INTERPOLATION_BICUBIC, true);
		}
	}

	/**
	 * Sets the new alpha value for the displayed album art.
	 * 
	 * @param imageAlpha
	 *            The new alpha value for the displayed album art.
	 */
	public void setImageAlpha(float imageAlpha) {
		this.imageAlpha = imageAlpha;
	}

	/**
	 * Sets the new alpha value for the previously displayed album art.
	 * 
	 * @param oldImageAlpha
	 *            The new alpha value for the previously displayed album art.
	 */
	public void setOldImageAlpha(float oldImageAlpha) {
		this.oldImageAlpha = oldImageAlpha;
	}

	@Override
	protected void paintComponent(Graphics g) {
		Graphics2D g2d = (Graphics2D) g.create();
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);

		int w = getWidth();
		int h = getHeight();
		g2d.setColor(new Color(192, 192, 192));
		g2d.fillRoundRect(0, 0, w - 1, h - 1, 4, 4);

		if (this.oldImageAlpha > 0.0f) {
			Graphics2D g2dImage = (Graphics2D) g2d.create();
			g2dImage.setComposite(AlphaComposite.SrcOver
					.derive(this.oldImageAlpha));
			if (this.oldImage != null) {
				// draw the original image
				g2dImage.drawImage(this.oldImage, INSETS
						+ (this.getWidth() - this.oldImage.getWidth()) / 2,
						INSETS + (ALBUM_ART_DIM - this.oldImage.getHeight())
								/ 2, null);
			}
			g2dImage.dispose();
		}

		if (this.imageAlpha > 0.0f) {
			Graphics2D g2dImage = (Graphics2D) g2d.create();
			g2dImage.setComposite(AlphaComposite.SrcOver
					.derive(this.imageAlpha));
			if (this.image != null) {
				// draw the original image
				g2dImage.drawImage(this.image, INSETS
						+ (this.getWidth() - this.image.getWidth()) / 2, INSETS
						+ (ALBUM_ART_DIM - this.image.getHeight()) / 2, null);
			}
			g2dImage.dispose();
		}

		g2d.setColor(Color.white);
		g2d.setStroke(new BasicStroke(2.0f));
		g2d.drawRoundRect(1, 1, w - 2, h - 2, 3, 3);
		g2d.setColor(new Color(128, 128, 128));
		g2d.setStroke(new BasicStroke(1.0f));
		g2d.drawRoundRect(0, 0, w - 1, h - 1, 4, 4);

		g2d.dispose();
	}
}