net.sf.mzmine.util.interpolatinglookuppaintscale.InterpolatingLookupPaintScale.java Source code

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Here is the source code for net.sf.mzmine.util.interpolatinglookuppaintscale.InterpolatingLookupPaintScale.java

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/*
 * Copyright 2006-2014 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 * 
 * MZmine 2 is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * MZmine 2; if not, write to the Free Software Foundation, Inc., 51 Franklin St,
 * Fifth Floor, Boston, MA 02110-1301 USA
 */

package net.sf.mzmine.util.interpolatinglookuppaintscale;

import java.awt.Color;
import java.awt.Paint;
import java.io.Serializable;
import java.util.Map;
import java.util.TreeMap;
import java.util.Map.Entry;

import org.jfree.chart.renderer.PaintScale;
import org.jfree.util.PublicCloneable;

public class InterpolatingLookupPaintScale implements PaintScale, PublicCloneable, Serializable {

    private class CompatibleEntry implements Map.Entry<Double, Color> {

        private Double key;
        private Color value;

        public CompatibleEntry(Double key, Color value) {
            this.key = key;
            this.value = value;
        }

        public Double getKey() {
            return key;
        }

        public Color getValue() {
            return value;
        }

        public Color setValue(Color value) {
            Color prevValue = value;
            this.value = value;
            return prevValue;
        }
    }

    private class CompatibleTreeMap extends TreeMap<Double, Color> {

        public Entry<Double, Color> floorEntry(Double value) {

            Double previousKey = null;
            for (Double currentKey : this.keySet()) {
                if (currentKey > value)
                    break;
                previousKey = currentKey;
            }
            if (previousKey == null)
                return null;
            return new CompatibleEntry(previousKey, this.get(previousKey));

        }

        public Entry<Double, Color> ceilingEntry(Double value) {
            for (Double currentKey : this.keySet()) {
                if (currentKey > value)
                    return new CompatibleEntry(currentKey, this.get(currentKey));
            }
            return null;
        }

    }

    private CompatibleTreeMap lookupTable;

    public InterpolatingLookupPaintScale() {
        lookupTable = new CompatibleTreeMap();
    }

    public void add(double value, Color color) {
        lookupTable.put(value, color);
    }

    public Double[] getLookupValues() {
        return lookupTable.keySet().toArray(new Double[0]);
    }

    public Paint getDefaultPaint() {
        return new Color(0, 0, 0);
    }

    public Paint getPaint(double value) {
        Entry<Double, Color> floor = lookupTable.floorEntry(value);
        Entry<Double, Color> ceil = lookupTable.ceilingEntry(value);

        // Special cases, no floor, ceil or both available for given value
        if ((floor == null) && (ceil == null))
            getDefaultPaint();
        if (floor == null) {
            assert ceil != null;
            return ceil.getValue();
        }

        if (ceil == null) {
            assert floor != null;
            return floor.getValue();
        }

        // Normal case, interpolate between floor and ceil
        double floorValue = floor.getKey();
        float[] floorRGB = floor.getValue().getRGBColorComponents(null);
        double ceilValue = ceil.getKey();
        float[] ceilRGB = ceil.getValue().getRGBColorComponents(null);

        float[] rgb = new float[3];
        for (int i = 0; i < 3; i++)
            rgb[i] = (float) (floorRGB[i]
                    + (ceilRGB[i] - floorRGB[i]) * (value - floorValue) / (ceilValue - floorValue));

        return new Color(rgb[0], rgb[1], rgb[2]);

    }

    public double getLowerBound() {
        return lookupTable.firstKey();
    }

    public double getUpperBound() {
        return lookupTable.lastKey();
    }

    public boolean equals(Object obj) {
        if (obj == this)
            return true;

        if (!(obj instanceof InterpolatingLookupPaintScale))
            return false;

        InterpolatingLookupPaintScale that = (InterpolatingLookupPaintScale) obj;

        if (that.lookupTable.equals(lookupTable))
            return true;
        else
            return false;

    }

    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}