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 */
021package org.biojava.bio.gui.sequence;
022
023import java.util.HashMap;
024import java.util.Iterator;
025import java.util.Map;
026
027/**
028 * Encapsulates the rendering info for a single line of the display.
029 * <p>
030 * The single line of info may be divided into multiple regions, each rendered
031 * by their own SequenceRenderer. It is the job of this class to cache the
032 * information about how much space each one wants, and how much space they want
033 * in total. A SequenceRenderer or SequencePanel that delegates rendering to
034 * multiple child SequenceRenderer instances may want to use these objects
035 * for storing this information about each row they are responsible for.
036 *
037 * @author Matthew Pocock
038 */
039public class LineInfo {
040  private Map rendererToDepth = new HashMap();
041  private double totalDepth = 0.0;
042  
043  public double getDepth(SequenceRenderer r) {
044    Double depth = (Double) rendererToDepth.get(r);
045    return depth.doubleValue();
046  }
047  
048  public void setDepth(SequenceRenderer r, double depth) {
049    totalDepth = Double.NaN;
050    
051    rendererToDepth.put(r, new Double(depth));
052  }
053  
054  public double getTotalDepth() {
055    if(Double.isNaN(totalDepth)) {
056      totalDepth = 0.0;
057      
058      for(Iterator i = rendererToDepth.values().iterator(); i.hasNext(); ) {
059        Double d = (Double) i.next(); // should never be null
060        totalDepth += d.doubleValue();
061      }
062    }
063    
064    return totalDepth;
065  }
066}