001 /*
002 * $Id: JPanelImage.java,v 1.6 2012/02/19 17:35:51 davep Exp $
003 *
004 * This file is part of McIDAS-V
005 *
006 * Copyright 2007-2012
007 * Space Science and Engineering Center (SSEC)
008 * University of Wisconsin - Madison
009 * 1225 W. Dayton Street, Madison, WI 53706, USA
010 * https://www.ssec.wisc.edu/mcidas
011 *
012 * All Rights Reserved
013 *
014 * McIDAS-V is built on Unidata's IDV and SSEC's VisAD libraries, and
015 * some McIDAS-V source code is based on IDV and VisAD source code.
016 *
017 * McIDAS-V is free software; you can redistribute it and/or modify
018 * it under the terms of the GNU Lesser Public License as published by
019 * the Free Software Foundation; either version 3 of the License, or
020 * (at your option) any later version.
021 *
022 * McIDAS-V is distributed in the hope that it will be useful,
023 * but WITHOUT ANY WARRANTY; without even the implied warranty of
024 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
025 * GNU Lesser Public License for more details.
026 *
027 * You should have received a copy of the GNU Lesser Public License
028 * along with this program. If not, see http://www.gnu.org/licenses.
029 */
030
031 package edu.wisc.ssec.mcidasv.ui;
032
033 import java.awt.Color;
034 import java.awt.Graphics;
035 import java.awt.Graphics2D;
036 import java.awt.Image;
037 import java.awt.RenderingHints;
038 import java.awt.geom.AffineTransform;
039 import java.awt.image.BufferedImage;
040
041 import javax.swing.JPanel;
042
043 /**
044 * Extend JPanel to draw an optionally anti-aliased image filling the panel
045 */
046 public class JPanelImage extends JPanel {
047
048 // The image to draw in the panel
049 private Image theImage;
050
051 // Use anti-aliasing
052 private boolean aa = true;
053
054 public JPanelImage() {}
055
056 public JPanelImage(Image panelImage) {
057 theImage = panelImage;
058 }
059
060 public boolean getAntiAlias() {
061 return aa;
062 }
063
064 public void setAntiAlias(boolean setAA) {
065 aa = setAA;
066 }
067
068 public Image getImage() {
069 return theImage;
070 }
071
072 public void setImage(Image panelImage) {
073 theImage = panelImage;
074 }
075
076 @Override
077 public void update(Graphics g) {
078 paint(g);
079 }
080
081 @Override
082 public void paint(Graphics g) {
083 if (aa) {
084 BufferedImage newImage = new BufferedImage(
085 this.getWidth(), this.getHeight(), BufferedImage.TYPE_INT_RGB);
086 double scaleX = (double)theImage.getWidth(null) / (double)this.getWidth();
087 double scaleY = (double)theImage.getHeight(null) / (double)this.getHeight();
088 double scaleXY = 1.0 / (Math.max(scaleX, scaleY));
089 Graphics2D g2d = newImage.createGraphics();
090 g2d.setBackground(Color.black);
091 g2d.clearRect(0, 0, this.getWidth(), this.getHeight());
092
093 RenderingHints hints = new RenderingHints(null);
094 hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
095 hints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
096 hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
097 g2d.setRenderingHints(hints);
098
099 g2d.drawImage(theImage, AffineTransform.getScaleInstance(scaleXY, scaleXY), null);
100 g.drawImage(newImage, 0, 0, null);
101 }
102 else {
103 g.drawImage(theImage, 0, 0, this.getWidth(), this.getHeight(), null);
104 }
105 }
106 }