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jfreechart example source code file (CategoryLineAnnotation.java)

This example jfreechart source code file (CategoryLineAnnotation.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, categorylineannotation, categorylineannotation, clonenotsupportedexception, comparable, comparable, geometry, illegalargumentexception, illegalargumentexception, io, ioexception, null, null, paint, rectangleedge, serializable, stroke

The jfreechart CategoryLineAnnotation.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.]
 *
 * ---------------------------
 * CategoryLineAnnotation.java
 * ---------------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 29-Jul-2005 : Version 1, based on CategoryTextAnnotation (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 06-Mar-2007 : Reimplemented hashCode() (DG);
 * 23-Apr-2008 : Implemented PublicCloneable (DG);
 *
 */

package org.jfree.chart.annotations;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.chart.HashUtilities;
import org.jfree.chart.axis.CategoryAnchor;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;

/**
 * A line annotation that can be placed on a {@link CategoryPlot}.
 */
public class CategoryLineAnnotation implements CategoryAnnotation,
        Cloneable, PublicCloneable, Serializable {

    /** For serialization. */
    static final long serialVersionUID = 3477740483341587984L;

    /** The category for the start of the line. */
    private Comparable category1;

    /** The value for the start of the line. */
    private double value1;

    /** The category for the end of the line. */
    private Comparable category2;

    /** The value for the end of the line. */
    private double value2;

    /** The line color. */
    private transient Paint paint = Color.black;

    /** The line stroke. */
    private transient Stroke stroke = new BasicStroke(1.0f);

    /**
     * Creates a new annotation that draws a line between (category1, value1)
     * and (category2, value2).
     *
     * @param category1  the category (<code>null not permitted).
     * @param value1  the value.
     * @param category2  the category (<code>null not permitted).
     * @param value2  the value.
     * @param paint  the line color (<code>null not permitted).
     * @param stroke  the line stroke (<code>null not permitted).
     */
    public CategoryLineAnnotation(Comparable category1, double value1,
                                  Comparable category2, double value2,
                                  Paint paint, Stroke stroke) {
        if (category1 == null) {
            throw new IllegalArgumentException("Null 'category1' argument.");
        }
        if (category2 == null) {
            throw new IllegalArgumentException("Null 'category2' argument.");
        }
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.category1 = category1;
        this.value1 = value1;
        this.category2 = category2;
        this.value2 = value2;
        this.paint = paint;
        this.stroke = stroke;
    }

    /**
     * Returns the category for the start of the line.
     *
     * @return The category for the start of the line (never <code>null).
     *
     * @see #setCategory1(Comparable)
     */
    public Comparable getCategory1() {
        return this.category1;
    }

    /**
     * Sets the category for the start of the line.
     *
     * @param category  the category (<code>null not permitted).
     *
     * @see #getCategory1()
     */
    public void setCategory1(Comparable category) {
        if (category == null) {
            throw new IllegalArgumentException("Null 'category' argument.");
        }
        this.category1 = category;
    }

    /**
     * Returns the y-value for the start of the line.
     *
     * @return The y-value for the start of the line.
     *
     * @see #setValue1(double)
     */
    public double getValue1() {
        return this.value1;
    }

    /**
     * Sets the y-value for the start of the line.
     *
     * @param value  the value.
     *
     * @see #getValue1()
     */
    public void setValue1(double value) {
        this.value1 = value;
    }

    /**
     * Returns the category for the end of the line.
     *
     * @return The category for the end of the line (never <code>null).
     *
     * @see #setCategory2(Comparable)
     */
    public Comparable getCategory2() {
        return this.category2;
    }

    /**
     * Sets the category for the end of the line.
     *
     * @param category  the category (<code>null not permitted).
     *
     * @see #getCategory2()
     */
    public void setCategory2(Comparable category) {
        if (category == null) {
            throw new IllegalArgumentException("Null 'category' argument.");
        }
        this.category2 = category;
    }

    /**
     * Returns the y-value for the end of the line.
     *
     * @return The y-value for the end of the line.
     *
     * @see #setValue2(double)
     */
    public double getValue2() {
        return this.value2;
    }

    /**
     * Sets the y-value for the end of the line.
     *
     * @param value  the value.
     *
     * @see #getValue2()
     */
    public void setValue2(double value) {
        this.value2 = value;
    }

    /**
     * Returns the paint used to draw the connecting line.
     *
     * @return The paint (never <code>null).
     *
     * @see #setPaint(Paint)
     */
    public Paint getPaint() {
        return this.paint;
    }

    /**
     * Sets the paint used to draw the connecting line.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getPaint()
     */
    public void setPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.paint = paint;
    }

    /**
     * Returns the stroke used to draw the connecting line.
     *
     * @return The stroke (never <code>null).
     *
     * @see #setStroke(Stroke)
     */
    public Stroke getStroke() {
        return this.stroke;
    }

    /**
     * Sets the stroke used to draw the connecting line.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @see #getStroke()
     */
    public void setStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.stroke = stroke;
    }

    /**
     * Draws the annotation.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param dataArea  the data area.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     */
    public void draw(Graphics2D g2, CategoryPlot plot, Rectangle2D dataArea,
                     CategoryAxis domainAxis, ValueAxis rangeAxis) {

        CategoryDataset dataset = plot.getDataset();
        int catIndex1 = dataset.getColumnIndex(this.category1);
        int catIndex2 = dataset.getColumnIndex(this.category2);
        int catCount = dataset.getColumnCount();

        double lineX1 = 0.0f;
        double lineY1 = 0.0f;
        double lineX2 = 0.0f;
        double lineY2 = 0.0f;
        PlotOrientation orientation = plot.getOrientation();
        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
            plot.getDomainAxisLocation(), orientation);
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
            plot.getRangeAxisLocation(), orientation);

        if (orientation == PlotOrientation.HORIZONTAL) {
            lineY1 = domainAxis.getCategoryJava2DCoordinate(
                CategoryAnchor.MIDDLE, catIndex1, catCount, dataArea,
                domainEdge);
            lineX1 = rangeAxis.valueToJava2D(this.value1, dataArea, rangeEdge);
            lineY2 = domainAxis.getCategoryJava2DCoordinate(
                CategoryAnchor.MIDDLE, catIndex2, catCount, dataArea,
                domainEdge);
            lineX2 = rangeAxis.valueToJava2D(this.value2, dataArea, rangeEdge);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            lineX1 = domainAxis.getCategoryJava2DCoordinate(
                CategoryAnchor.MIDDLE, catIndex1, catCount, dataArea,
                domainEdge);
            lineY1 = rangeAxis.valueToJava2D(this.value1, dataArea, rangeEdge);
            lineX2 = domainAxis.getCategoryJava2DCoordinate(
                CategoryAnchor.MIDDLE, catIndex2, catCount, dataArea,
                domainEdge);
            lineY2 = rangeAxis.valueToJava2D(this.value2, dataArea, rangeEdge);
        }
        g2.setPaint(this.paint);
        g2.setStroke(this.stroke);
        g2.drawLine((int) lineX1, (int) lineY1, (int) lineX2, (int) lineY2);
    }

    /**
     * Tests this object for equality with another.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return <code>true or false.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CategoryLineAnnotation)) {
            return false;
        }
        CategoryLineAnnotation that = (CategoryLineAnnotation) obj;
        if (!this.category1.equals(that.getCategory1())) {
            return false;
        }
        if (this.value1 != that.getValue1()) {
            return false;
        }
        if (!this.category2.equals(that.getCategory2())) {
            return false;
        }
        if (this.value2 != that.getValue2()) {
            return false;
        }
        if (!PaintUtilities.equal(this.paint, that.paint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return A hash code.
     */
    public int hashCode() {
        int result = 193;
        result = 37 * result + this.category1.hashCode();
        long temp = Double.doubleToLongBits(this.value1);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        result = 37 * result + this.category2.hashCode();
        temp = Double.doubleToLongBits(this.value2);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        result = 37 * result + HashUtilities.hashCodeForPaint(this.paint);
        result = 37 * result + this.stroke.hashCode();
        return result;
    }

    /**
     * Returns a clone of the annotation.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  this class will not throw this
     *         exception, but subclasses (if any) might.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.paint, stream);
        SerialUtilities.writeStroke(this.stroke, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.paint = SerialUtilities.readPaint(stream);
        this.stroke = SerialUtilities.readStroke(stream);
    }

}

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