001/*
002 *                  BioJava development code
003 *
004 * This code may be freely distributed and modified under the
005 * terms of the GNU Lesser General Public Licence.  This should
006 * be distributed with the code.  If you do not have a copy,
007 * see:
008 *
009 *      http://www.gnu.org/copyleft/lesser.html
010 *
011 * Copyright for this code is held jointly by the individual
012 * authors.  These should be listed in @author doc comments.
013 *
014 * For more information on the BioJava project and its aims,
015 * or to join the biojava-l mailing list, visit the home page
016 * at:
017 *
018 *      http://www.biojava.org/
019 *
020 * Created on Aug 3, 2007
021 */
022package org.biojava.nbio.structure.gui.util.color;
023
024import javax.swing.*;
025import java.awt.*;
026
027public class GradientPanel extends JPanel {
028        private static final long serialVersionUID = -6387922432121206731L;
029        private ContinuousColorMapper mapper;
030        private double min, max;
031
032
033        public GradientPanel(ContinuousColorMapper mapper, double min, double max) {
034                this.min = min;
035                this.max = max;
036                this.mapper = mapper;
037                this.setPreferredSize(new Dimension(100,20));
038        }
039
040        @Override
041        public void paintComponent(Graphics g) {
042                Graphics2D g2 = (Graphics2D) g;
043                int w = getWidth();
044                int h = getHeight();
045
046                g2.setStroke(new BasicStroke(1.0f));
047                for(int i=0;i<w;i++) {
048                        double val = (max-min)*i/w+min;
049                        g2.setColor(mapper.getColor(val));
050                        g2.drawLine(i, 0, i, h);
051                }
052        }
053
054}