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jfreechart example source code file (WaferMapRenderer.java)

This example jfreechart source code file (WaferMapRenderer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, geometry, integer, integer, iterator, iterator, legenditemcollection, number, number, paint, paint, set, string, util, value_index, wafermapplot, wafermaprenderer

The jfreechart WaferMapRenderer.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ---------------------
 * WaferMapRenderer.java
 * ---------------------
 * (C) Copyright 2003-2008, by Robert Redburn and Contributors.
 *
 * Original Author:  Robert Redburn;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 25-Nov-2003 : Version 1, contributed by Robert Redburn.  Changes have been
 *               made to fit the JFreeChart coding style (DG);
 * 20-Apr-2005 : Small update for changes to LegendItem class (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
 *
 */

package org.jfree.chart.renderer;

import java.awt.Color;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.plot.DrawingSupplier;
import org.jfree.chart.plot.WaferMapPlot;
import org.jfree.data.general.WaferMapDataset;

/**
 * A renderer for wafer map plots.  Provides color managment facilities.
 */
public class WaferMapRenderer extends AbstractRenderer {

    /** paint index */
    private Map paintIndex;

    /** plot */
    private WaferMapPlot plot;

    /** paint limit */
    private int paintLimit;

    /** default paint limit */
    private static final int DEFAULT_PAINT_LIMIT = 35;

    /** default multivalue paint calculation */
    public static final int POSITION_INDEX = 0;

    /** The default value index. */
    public static final int VALUE_INDEX = 1;

    /** paint index method */
    private int paintIndexMethod;

    /**
     * Creates a new renderer.
     */
    public WaferMapRenderer() {
        this(null, null);
    }

    /**
     * Creates a new renderer.
     *
     * @param paintLimit  the paint limit.
     * @param paintIndexMethod  the paint index method.
     */
    public WaferMapRenderer(int paintLimit, int paintIndexMethod) {
        this(new Integer(paintLimit), new Integer(paintIndexMethod));
    }

    /**
     * Creates a new renderer.
     *
     * @param paintLimit  the paint limit.
     * @param paintIndexMethod  the paint index method.
     */
    public WaferMapRenderer(Integer paintLimit, Integer paintIndexMethod) {

        super();
        this.paintIndex = new HashMap();

        if (paintLimit == null) {
            this.paintLimit = DEFAULT_PAINT_LIMIT;
        }
        else {
            this.paintLimit = paintLimit.intValue();
        }

        this.paintIndexMethod = VALUE_INDEX;
        if (paintIndexMethod != null) {
            if (isMethodValid(paintIndexMethod.intValue())) {
                this.paintIndexMethod = paintIndexMethod.intValue();
            }
        }
    }

    /**
     * Verifies that the passed paint index method is valid.
     *
     * @param method  the method.
     *
     * @return <code>true or false.
     */
    private boolean isMethodValid(int method) {
        switch (method) {
            case POSITION_INDEX: return true;
            case VALUE_INDEX:    return true;
            default: return false;
        }
    }

    /**
     * Returns the drawing supplier from the plot.
     *
     * @return The drawing supplier.
     */
    public DrawingSupplier getDrawingSupplier() {
        DrawingSupplier result = null;
        WaferMapPlot p = getPlot();
        if (p != null) {
            result = p.getDrawingSupplier();
        }
        return result;
    }

    /**
     * Returns the plot.
     *
     * @return The plot.
     */
    public WaferMapPlot getPlot() {
        return this.plot;
    }

    /**
     * Sets the plot and build the paint index.
     *
     * @param plot  the plot.
     */
    public void setPlot(WaferMapPlot plot) {
        this.plot = plot;
        makePaintIndex();
    }

    /**
     * Returns the paint for a given chip value.
     *
     * @param value  the value.
     *
     * @return The paint.
     */
    public Paint getChipColor(Number value) {
        return getSeriesPaint(getPaintIndex(value));
    }

    /**
     * Returns the paint index for a given chip value.
     *
     * @param value  the value.
     *
     * @return The paint index.
     */
    private int getPaintIndex(Number value) {
        return ((Integer) this.paintIndex.get(value)).intValue();
    }

    /**
     * Builds a map of chip values to paint colors.
     * paintlimit is the maximum allowed number of colors.
     */
    private void makePaintIndex() {
        if (this.plot == null) {
            return;
        }
        WaferMapDataset data = this.plot.getDataset();
        Number dataMin = data.getMinValue();
        Number dataMax = data.getMaxValue();
        Set uniqueValues = data.getUniqueValues();
        if (uniqueValues.size() <= this.paintLimit) {
            int count = 0; // assign a color for each unique value
            for (Iterator i = uniqueValues.iterator(); i.hasNext();) {
                this.paintIndex.put(i.next(), new Integer(count++));
            }
        }
        else {
            // more values than paints so map
            // multiple values to the same color
            switch (this.paintIndexMethod) {
                case POSITION_INDEX:
                    makePositionIndex(uniqueValues);
                    break;
                case VALUE_INDEX:
                    makeValueIndex(dataMax, dataMin, uniqueValues);
                    break;
                default:
                    break;
            }
        }
    }

    /**
     * Builds the paintindex by assigning colors based on the number
     * of unique values: totalvalues/totalcolors.
     *
     * @param uniqueValues  the set of unique values.
     */
    private void makePositionIndex(Set uniqueValues) {
        int valuesPerColor = (int) Math.ceil(
            (double) uniqueValues.size() / this.paintLimit
        );
        int count = 0; // assign a color for each unique value
        int paint = 0;
        for (Iterator i = uniqueValues.iterator(); i.hasNext();) {
            this.paintIndex.put(i.next(), new Integer(paint));
            if (++count % valuesPerColor == 0) {
                paint++;
            }
            if (paint > this.paintLimit) {
                paint = this.paintLimit;
            }
        }
    }

    /**
     * Builds the paintindex by assigning colors evenly across the range
     * of values:  maxValue-minValue/totalcolors
     *
     * @param max  the maximum value.
     * @param min  the minumum value.
     * @param uniqueValues  the unique values.
     */
    private void makeValueIndex(Number max, Number min, Set uniqueValues) {
        double valueRange = max.doubleValue() - min.doubleValue();
        double valueStep = valueRange / this.paintLimit;
        int paint = 0;
        double cutPoint = min.doubleValue() + valueStep;
        for (Iterator i = uniqueValues.iterator(); i.hasNext();) {
            Number value = (Number) i.next();
            while (value.doubleValue() > cutPoint) {
                cutPoint += valueStep;
                paint++;
                if (paint > this.paintLimit) {
                    paint = this.paintLimit;
                }
            }
            this.paintIndex.put(value, new Integer(paint));
        }
    }

    /**
     * Builds the list of legend entries.  called by getLegendItems in
     * WaferMapPlot to populate the plot legend.
     *
     * @return The legend items.
     */
    public LegendItemCollection getLegendCollection() {
        LegendItemCollection result = new LegendItemCollection();
        if (this.paintIndex != null && this.paintIndex.size() > 0) {
            if (this.paintIndex.size() <= this.paintLimit) {
                for (Iterator i = this.paintIndex.entrySet().iterator();
                     i.hasNext();) {
                    // in this case, every color has a unique value
                    Map.Entry entry =  (Map.Entry) i.next();
                    String label = entry.getKey().toString();
                    String description = label;
                    Shape shape = new Rectangle2D.Double(1d, 1d, 1d, 1d);
                    Paint paint = lookupSeriesPaint(
                            ((Integer) entry.getValue()).intValue());
                    Paint outlinePaint = Color.black;
                    Stroke outlineStroke = DEFAULT_STROKE;

                    result.add(new LegendItem(label, description, null,
                            null, shape, paint, outlineStroke, outlinePaint));

                }
            }
            else {
                // in this case, every color has a range of values
                Set unique = new HashSet();
                for (Iterator i = this.paintIndex.entrySet().iterator();
                     i.hasNext();) {
                    Map.Entry entry = (Map.Entry) i.next();
                    if (unique.add(entry.getValue())) {
                        String label = getMinPaintValue(
                            (Integer) entry.getValue()).toString()
                            + " - " + getMaxPaintValue(
                                (Integer) entry.getValue()).toString();
                        String description = label;
                        Shape shape = new Rectangle2D.Double(1d, 1d, 1d, 1d);
                        Paint paint = getSeriesPaint(
                            ((Integer) entry.getValue()).intValue()
                        );
                        Paint outlinePaint = Color.black;
                        Stroke outlineStroke = DEFAULT_STROKE;

                        result.add(new LegendItem(label, description,
                                null, null, shape, paint, outlineStroke,
                                outlinePaint));
                    }
                } // end foreach map entry
            } // end else
        }
        return result;
    }

    /**
     * Returns the minimum chip value assigned to a color
     * in the paintIndex
     *
     * @param index  the index.
     *
     * @return The value.
     */
    private Number getMinPaintValue(Integer index) {
        double minValue = Double.POSITIVE_INFINITY;
        for (Iterator i = this.paintIndex.entrySet().iterator(); i.hasNext();) {
            Map.Entry entry = (Map.Entry) i.next();
            if (((Integer) entry.getValue()).equals(index)) {
                if (((Number) entry.getKey()).doubleValue() < minValue) {
                    minValue = ((Number) entry.getKey()).doubleValue();
                }
            }
        }
        return new Double(minValue);
    }

    /**
     * Returns the maximum chip value assigned to a color
     * in the paintIndex
     *
     * @param index  the index.
     *
     * @return The value
     */
    private Number getMaxPaintValue(Integer index) {
        double maxValue = Double.NEGATIVE_INFINITY;
        for (Iterator i = this.paintIndex.entrySet().iterator(); i.hasNext();) {
            Map.Entry entry = (Map.Entry) i.next();
            if (((Integer) entry.getValue()).equals(index)) {
                if (((Number) entry.getKey()).doubleValue() > maxValue) {
                    maxValue = ((Number) entry.getKey()).doubleValue();
                }
            }
        }
        return new Double(maxValue);
    }


} // end class wafermaprenderer

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