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jfreechart example source code file (XYLine3DRenderer.java)

This example jfreechart source code file (XYLine3DRenderer.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, classnotfoundexception, color, default_wall_paint, default_x_offset, default_y_offset, default_y_offset, io, ioexception, ioexception, paint, paint, serializable, shape, xyline3drenderer, xyline3drenderer

The jfreechart XYLine3DRenderer.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.]
 *
 * ---------------------
 * XYLine3DRenderer.java
 * ---------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 14-Jan-2005 : Added standard header (DG);
 * 01-May-2007 : Fixed equals() and serialization bugs (DG);
 *
 */

package org.jfree.chart.renderer.xy;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.chart.Effect3D;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.io.SerialUtilities;
import org.jfree.util.PaintUtilities;

/**
 * A XYLineAndShapeRenderer that adds a shadow line to the graph
 * to emulate a 3D-effect.
 */
public class XYLine3DRenderer extends XYLineAndShapeRenderer
                              implements Effect3D, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 588933208243446087L;

    /** The default x-offset for the 3D effect. */
    public static final double DEFAULT_X_OFFSET = 12.0;

    /** The default y-offset for the 3D effect. */
    public static final double DEFAULT_Y_OFFSET = 8.0;

    /** The default wall paint. */
    public static final Paint DEFAULT_WALL_PAINT = new Color(0xDD, 0xDD, 0xDD);

    /** The size of x-offset for the 3D effect. */
    private double xOffset;

    /** The size of y-offset for the 3D effect. */
    private double yOffset;

    /** The paint used to shade the left and lower 3D wall. */
    private transient Paint wallPaint;

    /**
     * Creates a new renderer.
     */
    public XYLine3DRenderer() {
        this.wallPaint = DEFAULT_WALL_PAINT;
        this.xOffset = DEFAULT_X_OFFSET;
        this.yOffset = DEFAULT_Y_OFFSET;
    }

    /**
     * Returns the x-offset for the 3D effect.
     *
     * @return The 3D effect.
     */
    public double getXOffset() {
        return this.xOffset;
    }

    /**
     * Returns the y-offset for the 3D effect.
     *
     * @return The 3D effect.
     */
    public double getYOffset() {
        return this.yOffset;
    }

    /**
     * Sets the x-offset and sends a {@link RendererChangeEvent} to all
     * registered listeners.
     *
     * @param xOffset  the x-offset.
     */
    public void setXOffset(double xOffset) {
        this.xOffset = xOffset;
        fireChangeEvent();
    }

    /**
     * Sets the y-offset and sends a {@link RendererChangeEvent} to all
     * registered listeners.
     *
     * @param yOffset  the y-offset.
     */
    public void setYOffset(double yOffset) {
        this.yOffset = yOffset;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to highlight the left and bottom wall in the plot
     * background.
     *
     * @return The paint.
     */
    public Paint getWallPaint() {
        return this.wallPaint;
    }

    /**
     * Sets the paint used to hightlight the left and bottom walls in the plot
     * background and sends a {@link RendererChangeEvent} to all registered
     * listeners.
     *
     * @param paint  the paint.
     */
    public void setWallPaint(Paint paint) {
        this.wallPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the number of passes through the data that the renderer requires
     * in order to draw the chart.  Most charts will require a single pass,
     * but some require two passes.
     *
     * @return The pass count.
     */
    public int getPassCount() {
        return 3;
    }

    /**
     * Returns <code>true if the specified pass involves drawing lines.
     *
     * @param pass  the pass.
     *
     * @return A boolean.
     */
    protected boolean isLinePass(int pass) {
        return pass == 0 || pass == 1;
    }

    /**
     * Returns <code>true if the specified pass involves drawing items.
     *
     * @param pass  the pass.
     *
     * @return A boolean.
     */
    protected boolean isItemPass(int pass) {
        return pass == 2;
    }

    /**
     * Returns <code>true if the specified pass involves drawing shadows.
     *
     * @param pass  the pass.
     *
     * @return A boolean.
     */
    protected boolean isShadowPass (int pass) {
        return pass == 0;
    }

    /**
     * Overrides the method in the subclass to draw a shadow in the first pass.
     *
     * @param g2  the graphics device.
     * @param pass  the pass.
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     * @param shape  the shape.
     */
    protected void drawFirstPassShape(Graphics2D g2,
                                      int pass,
                                      int series,
                                      int item,
                                      Shape shape) {
        if (isShadowPass(pass)) {
            if (getWallPaint() != null) {
                g2.setStroke(getItemStroke(series, item));
                g2.setPaint(getWallPaint());
                g2.translate(getXOffset(), getYOffset());
                g2.draw(shape);
                g2.translate(-getXOffset(), -getYOffset());
            }
        }
        else {
            // now draw the real shape
            super.drawFirstPassShape(g2, pass, series, item, shape);
        }
    }

    /**
     * Tests this renderer for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof XYLine3DRenderer)) {
            return false;
        }
        XYLine3DRenderer that = (XYLine3DRenderer) obj;
        if (this.xOffset != that.xOffset) {
            return false;
        }
        if (this.yOffset != that.yOffset) {
            return false;
        }
        if (!PaintUtilities.equal(this.wallPaint, that.wallPaint)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * 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.wallPaint = SerialUtilities.readPaint(stream);
    }

    /**
     * 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.wallPaint, stream);
    }

}

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