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}