jfreechart example source code file (LineBorder.java)

This example jfreechart source code file (LineBorder.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, geometry, illegalargumentexception, illegalargumentexception, io, ioexception, lineborder, lineborder, null, null, paint, rectangle2d, rectangleinsets, serializable, stroke, stroke

The jfreechart LineBorder.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.]
 *
 * ---------------
 * LineBorder.java
 * ---------------
 * (C) Copyright 2007, 2008, by Christo Zietsman and Contributors.
 *
 * Original Author:  Christo Zietsman;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes:
 * --------
 * 16-Mar-2007 : Version 1, contributed by Christo Zietsman with
 *               modifications by DG (DG);
 * 13-Jun-2007 : Don't draw if area doesn't have positive dimensions (DG);
 *
 */

package org.jfree.chart.block;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;

/**
 * A line border for any {@link AbstractBlock}.
 *
 * @since 1.0.5
 */
public class LineBorder implements BlockFrame, Serializable {

    /** For serialization. */
    static final long serialVersionUID = 4630356736707233924L;

    /** The line color. */
    private transient Paint paint;

    /** The line stroke. */
    private transient Stroke stroke;

    /** The insets. */
    private RectangleInsets insets;

    /**
     * Creates a default border.
     */
    public LineBorder() {
        this(Color.black, new BasicStroke(1.0f), new RectangleInsets(1.0, 1.0,
                1.0, 1.0));
    }

    /**
     * Creates a new border with the specified color.
     *
     * @param paint  the color (<code>null not permitted).
     * @param stroke  the border stroke (<code>null not permitted).
     * @param insets  the insets (<code>null not permitted).
     */
    public LineBorder(Paint paint, Stroke stroke, RectangleInsets insets) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        if (insets == null) {
            throw new IllegalArgumentException("Null 'insets' argument.");
        }
        this.paint = paint;
        this.stroke = stroke;
        this.insets = insets;
    }

    /**
     * Returns the paint.
     *
     * @return The paint (never <code>null).
     */
    public Paint getPaint() {
        return this.paint;
    }

    /**
     * Returns the insets.
     *
     * @return The insets (never <code>null).
     */
    public RectangleInsets getInsets() {
        return this.insets;
    }

    /**
     * Returns the stroke.
     *
     * @return The stroke (never <code>null).
     */
    public Stroke getStroke() {
        return this.stroke;
    }

    /**
     * Draws the border by filling in the reserved space (in black).
     *
     * @param g2  the graphics device.
     * @param area  the area.
     */
    public void draw(Graphics2D g2, Rectangle2D area) {
        double w = area.getWidth();
        double h = area.getHeight();
        // if the area has zero height or width, we shouldn't draw anything
        if (w <= 0.0 || h <= 0.0) {
            return;
        }
        double t = this.insets.calculateTopInset(h);
        double b = this.insets.calculateBottomInset(h);
        double l = this.insets.calculateLeftInset(w);
        double r = this.insets.calculateRightInset(w);
        double x = area.getX();
        double y = area.getY();
        double x0 = x + l / 2.0;
        double x1 = x + w - r / 2.0;
        double y0 = y + h - b / 2.0;
        double y1 = y + t / 2.0;
        g2.setPaint(getPaint());
        g2.setStroke(getStroke());
        Line2D line = new Line2D.Double();
        if (t > 0.0) {
            line.setLine(x0, y1, x1, y1);
            g2.draw(line);
        }
        if (b > 0.0) {
            line.setLine(x0, y0, x1, y0);
            g2.draw(line);
        }
        if (l > 0.0) {
            line.setLine(x0, y0, x0, y1);
            g2.draw(line);
        }
        if (r > 0.0) {
            line.setLine(x1, y0, x1, y1);
            g2.draw(line);
        }
    }

    /**
     * Tests this border for equality with an arbitrary instance.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof LineBorder)) {
            return false;
        }
        LineBorder that = (LineBorder) obj;
        if (!PaintUtilities.equal(this.paint, that.paint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
            return false;
        }
        if (!this.insets.equals(that.insets)) {
            return false;
        }
        return true;
    }

    /**
     * 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);
    }
}