boxandwhiskerrenderer.java

这是一个segy数据显示程序

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------------
 * BoxAndWhiskerRenderer.java
 * --------------------------
 * (C) Copyright 2003, 2004, by David Browning and Contributors.
 *
 * Original Author:  David Browning (for the Australian Institute of Marine Science);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *                   Tim Bardzil;
 *
 * $Id: BoxAndWhiskerRenderer.java,v 1.29 2004/06/02 14:40:50 mungady Exp $
 *
 * Changes
 * -------
 * 21-Aug-2003 : Version 1, contributed by David Browning (for the Australian Institute of 
 *               Marine Science);
 * 01-Sep-2003 : Incorporated outlier and farout symbols for low values also (DG);
 * 08-Sep-2003 : Changed ValueAxis API (DG);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 07-Oct-2003 : Added renderer state (DG);
 * 12-Nov-2003 : Fixed casting bug reported by Tim Bardzil (DG);
 * 13-Nov-2003 : Added drawHorizontalItem(...) method contributed by Tim Bardzil (DG);
 * 25-Apr-2004 : Added fillBox attribute, equals() method and added serialization code (DG);
 * 29-Apr-2004 : Changed drawing of upper and lower shadows - see bug report 944011 (DG);
 * 
 */

package org.jfree.chart.renderer;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.CategoryItemEntity;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.labels.CategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.data.CategoryDataset;
import org.jfree.data.statistics.BoxAndWhiskerCategoryDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.ObjectUtils;
import org.jfree.util.PublicCloneable;

/**
 * A box-and-whisker renderer.
 */
public class BoxAndWhiskerRenderer extends AbstractCategoryItemRenderer 
                                   implements Cloneable, PublicCloneable, Serializable {

    /** The color used to paint the median line and average marker. */
    private transient Paint artifactPaint;

    /** A flag that controls whether or not the box is filled. */
    private boolean fillBox;
    
    /** The margin between items (boxes) within a category. */
    private double itemMargin;

    /**
     * Default constructor.
     */
    public BoxAndWhiskerRenderer() {
        this.artifactPaint = Color.black;
        this.fillBox = true;
        this.itemMargin = 0.20;
    }

    /**
     * Returns the paint used to color the median and average markers.
     * 
     * @return A paint.
     */
    public Paint getArtifactPaint() {
        return this.artifactPaint;
    }

    /**
     * Sets the paint used to color the median and average markers.
     * 
     * @param paint  the paint.
     */
    public void setArtifactPaint(Paint paint) {
        this.artifactPaint = paint;
    }

    /**
     * Returns the flag that controls whether or not the box is filled.
     * 
     * @return A boolean.
     */
    public boolean getFillBox() {
        return this.fillBox;   
    }
    
    /**
     * Sets the flag that controls whether or not the box is filled and sends a 
     * {@link RendererChangeEvent} to all registered listeners.
     * 
     * @param flag  the flag.
     */
    public void setFillBox(boolean flag) {
        this.fillBox = flag;
        notifyListeners(new RendererChangeEvent(this));
    }

    /**
     * Returns the item margin.  This is a percentage of the available space that is allocated
     * to the space between items in the chart.
     * 
     * @return The margin.
     */
    public double getItemMargin() {
        return this.itemMargin;
    }

    /**
     * Sets the item margin.
     * 
     * @param margin  the margin.
     */
    public void setItemMargin(double margin) {
        this.itemMargin = margin;
    }

    /**
     * Initialises the renderer.
     * <p>
     * This method gets called once at the start of the process of drawing a chart.
     *
     * @param g2  the graphics device.
     * @param dataArea  the area in which the data is to be plotted.
     * @param plot  the plot.
     * @param rendererIndex  the renderer index.
     * @param info  collects chart rendering information for return to caller.
     *
     * @return The renderer state.
     */
    public CategoryItemRendererState initialise(Graphics2D g2,
                                                Rectangle2D dataArea,
                                                CategoryPlot plot,
                                                int rendererIndex,
                                                PlotRenderingInfo info) {

        CategoryItemRendererState state = super.initialise(g2, dataArea, plot, rendererIndex, info);

        // calculate the box width
        CategoryAxis domainAxis = getDomainAxis(plot, rendererIndex);
        CategoryDataset dataset = plot.getDataset(rendererIndex);
        if (dataset != null) {
            int columns = dataset.getColumnCount();
            int rows = dataset.getRowCount();
            double space = 0.0;
            PlotOrientation orientation = plot.getOrientation();
            if (orientation == PlotOrientation.HORIZONTAL) {
                space = dataArea.getHeight();
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                space = dataArea.getWidth();
            }
            double categoryMargin = 0.0;
            double currentItemMargin = 0.0;
            if (columns > 1) {
                categoryMargin = domainAxis.getCategoryMargin();
            }
            if (rows > 1) {
                currentItemMargin = getItemMargin();
            }
            double used = space * (1 - domainAxis.getLowerMargin() - domainAxis.getUpperMargin()
                                     - categoryMargin - currentItemMargin);
            if ((rows * columns) > 0) {
                state.setBarWidth(used / (dataset.getColumnCount() * dataset.getRowCount()));
            }
            else {
                state.setBarWidth(used);
            }
        }
        
        return state;

    }

    /**
     * Draw a single data item.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area in which the data is drawn.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the data.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    public void drawItem(Graphics2D g2,
                         CategoryItemRendererState state,
                         Rectangle2D dataArea,
                         CategoryPlot plot,
                         CategoryAxis domainAxis,
                         ValueAxis rangeAxis,
                         CategoryDataset dataset,
                         int row,
                         int column) {
                             
        if (!(dataset instanceof BoxAndWhiskerCategoryDataset)) {
            throw new IllegalArgumentException("BoxAndWhiskerRenderer.drawItem()"
                + " : the data should be of type BoxAndWhiskerCategoryDataset only.");
        }

        PlotOrientation orientation = plot.getOrientation();

        if (orientation == PlotOrientation.HORIZONTAL) {
            drawHorizontalItem(
                g2, state, dataArea, plot, domainAxis, rangeAxis, dataset, row, column
            );
        } 
        else if (orientation == PlotOrientation.VERTICAL) {
            drawVerticalItem(
                g2, state, dataArea, plot, domainAxis, rangeAxis, dataset, row, column
            );
        }
        
    }

    /**
     * Draws the visual representation of a single data item when the plot has a horizontal
     * orientation.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the plot is being drawn.
     * @param plot  the plot (can be used to obtain standard color information etc).
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    public void drawHorizontalItem(Graphics2D g2,
                                   CategoryItemRendererState state,
                                   Rectangle2D dataArea,
                                   CategoryPlot plot,
                                   CategoryAxis domainAxis,
                                   ValueAxis rangeAxis,
                                   CategoryDataset dataset,
                                   int row,
                                   int column) {

        BoxAndWhiskerCategoryDataset bawDataset = (BoxAndWhiskerCategoryDataset) dataset;

        double categoryEnd = domainAxis.getCategoryEnd(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge());
        double categoryStart = domainAxis.getCategoryStart(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge());
        double categoryWidth = Math.abs(categoryEnd - categoryStart);

        double yy = categoryStart;
        int seriesCount = getRowCount();
        int categoryCount = getColumnCount();

        if (seriesCount > 1) {
            double seriesGap = dataArea.getWidth() * getItemMargin()
                               / (categoryCount * (seriesCount - 1));
            double usedWidth = (state.getBarWidth() * seriesCount) 
                               + (seriesGap * (seriesCount - 1));
            // offset the start of the boxes if the total width used is smaller
            // than the category width
            double offset = (categoryWidth - usedWidth) / 2;
            yy = yy + offset + (row * (state.getBarWidth() + seriesGap));
        } 
        else {
            // offset the start of the box if the box width is smaller than the category width
            double offset = (categoryWidth - state.getBarWidth()) / 2;
            yy = yy + offset;
        }

        Paint p = this.getItemPaint(row, column);
        if (p != null) {
            g2.setPaint(p);
        }
        Stroke s = getItemStroke(row, column);
        g2.setStroke(s);

        RectangleEdge location = plot.getRangeAxisEdge();

        Number xQ1 = bawDataset.getQ1Value(row, column);
        Number xQ3 = bawDataset.getQ3Value(row, column);
        Number xMax = bawDataset.getMaxRegularValue(row, column);
        Number xMin = bawDataset.getMinRegularValue(row, column);

        Shape box = null;
        if (xQ1 != null && xQ3 != null && xMax != null && xMin != null) {

            double xxQ1 = rangeAxis.valueToJava2D(xQ1.doubleValue(), dataArea, location);
            double xxQ3 = rangeAxis.valueToJava2D(xQ3.doubleValue(), dataArea, location);
            double xxMax = rangeAxis.valueToJava2D(xMax.doubleValue(), dataArea, location);
            double xxMin = rangeAxis.valueToJava2D(xMin.doubleValue(), dataArea, location);
            double yymid = yy + state.getBarWidth() / 2.0;
            
            // draw the upper shadow...
            g2.draw(new Line2D.Double(xxMax, yymid, xxQ3, yymid));
            g2.draw(new Line2D.Double(xxMax, yy, xxMax, yy + state.getBarWidth()));

            // draw the lower shadow...
            g2.draw(new Line2D.Double(xxMin, yymid, xxQ1, yymid));
            g2.draw(new Line2D.Double(xxMin, yy, xxMin, yy + state.getBarWidth()));

            // draw the box...
            box = new Rectangle2D.Double(
                Math.min(xxQ1, xxQ3), yy, Math.abs(xxQ1 - xxQ3), state.getBarWidth()
            );
            if (this.fillBox) {
                g2.fill(box);
            } 
            g2.draw(box);

        }

        g2.setPaint(this.artifactPaint);
        double aRadius = 0;                 // average radius

        // draw mean - SPECIAL AIMS REQUIREMENT...
        Number xMean = bawDataset.getMeanValue(row, column);
        if (xMean != null) {