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 java.awt.*; 025 026/** 027 * Maps colors by performing a transform of the input data and then passing 028 * the transformed value to a ContinuousColorMapper for rendering. 029 * 030 * For instance, to map [10^0, 10^10] to a rainbow gradient, use 031 * 032 * new LogColorMapper(GradientMapper.getGradientMapper(GradientMapper.RAINBOW_GRADIENT, 0, 10)) 033 * 034 * @author Spencer Bliven 035 * 036 */ 037public abstract class ContinuousColorMapperTransform implements ContinuousColorMapper { 038 039 protected ContinuousColorMapper mapper; 040 041 /** 042 * Creates a transform. 043 * @param submapper A color mapper which acts on the transformed input value. 044 */ 045 public ContinuousColorMapperTransform(ContinuousColorMapper submapper) { 046 this.mapper = submapper; 047 } 048 049 /** 050 * Return the color corresponding to submapper.getColor(transform(value)). 051 * 052 * @param value Value to be mapped 053 * @return color corresponding to transform(value) 054 * @see org.biojava.nbio.structure.gui.util.color.ContinuousColorMapper#getColor(double) 055 */ 056 @Override 057 public Color getColor(double value) { 058 return mapper.getColor(transform(value)); 059 } 060 061 /** 062 * An arbitrary transform over reals 063 * @param the input value 064 * @return the transformed value 065 */ 066 public abstract double transform(double value); 067}