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jfreechart example source code file (CompositeTitle.java)

This example jfreechart source code file (CompositeTitle.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, blockcontainer, blockcontainer, compositetitle, compositetitle, geometry, illegalargumentexception, io, ioexception, ioexception, null, object, object, paint, rectangle2d, rectangleconstraint, size2d

The jfreechart CompositeTitle.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.]
 *
 * -------------------
 * CompositeTitle.java
 * -------------------
 * (C) Copyright 2005-2008, by David Gilbert and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Eric Penfold (patch 2006826);
 *
 * Changes
 * -------
 * 19-Nov-2004 : Version 1 (DG);
 * 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
 * 04-Feb-2005 : Implemented MAXIMUM_WIDTH in calculateSize (DG);
 * 20-Apr-2005 : Added new draw() method (DG);
 * 03-May-2005 : Implemented equals() method (DG);
 * 02-Jul-2008 : Applied patch 2006826 by Eric Penfold, to enable chart
 *               entities to be generated (DG);
 * 09-Jul-2008 : Added backgroundPaint field (DG);
 *
 */

package org.jfree.chart.title;

import java.awt.Graphics2D;
import java.awt.Paint;
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.block.BlockContainer;
import org.jfree.chart.block.BorderArrangement;
import org.jfree.chart.block.RectangleConstraint;
import org.jfree.chart.event.TitleChangeEvent;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.Size2D;
import org.jfree.util.PaintUtilities;

/**
 * A title that contains multiple titles within a {@link BlockContainer}.
 */
public class CompositeTitle extends Title implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -6770854036232562290L;

    /**
     * The background paint.
     *
     * @since 1.0.11
     */
    private transient Paint backgroundPaint;

    /** A container for the individual titles. */
    private BlockContainer container;

    /**
     * Creates a new composite title with a default border arrangement.
     */
    public CompositeTitle() {
        this(new BlockContainer(new BorderArrangement()));
    }

    /**
     * Creates a new title using the specified container.
     *
     * @param container  the container (<code>null not permitted).
     */
    public CompositeTitle(BlockContainer container) {
        if (container == null) {
            throw new IllegalArgumentException("Null 'container' argument.");
        }
        this.container = container;
        this.backgroundPaint = null;
    }

    /**
     * Returns the background paint.
     *
     * @return The paint (possibly <code>null).
     *
     * @since 1.0.11
     */
    public Paint getBackgroundPaint() {
        return this.backgroundPaint;
    }

    /**
     * Sets the background paint and sends a {@link TitleChangeEvent} to all
     * registered listeners.  If you set this attribute to <code>null,
     * no background is painted (which makes the title background transparent).
     *
     * @param paint  the background paint (<code>null permitted).
     *
     * @since 1.0.11
     */
    public void setBackgroundPaint(Paint paint) {
        this.backgroundPaint = paint;
        notifyListeners(new TitleChangeEvent(this));
    }

    /**
     * Returns the container holding the titles.
     *
     * @return The title container (never <code>null).
     */
    public BlockContainer getContainer() {
        return this.container;
    }

    /**
     * Sets the title container.
     *
     * @param container  the container (<code>null not permitted).
     */
    public void setTitleContainer(BlockContainer container) {
        if (container == null) {
            throw new IllegalArgumentException("Null 'container' argument.");
        }
        this.container = container;
    }

    /**
     * Arranges the contents of the block, within the given constraints, and
     * returns the block size.
     *
     * @param g2  the graphics device.
     * @param constraint  the constraint (<code>null not permitted).
     *
     * @return The block size (in Java2D units, never <code>null).
     */
    public Size2D arrange(Graphics2D g2, RectangleConstraint constraint) {
        RectangleConstraint contentConstraint = toContentConstraint(constraint);
        Size2D contentSize = this.container.arrange(g2, contentConstraint);
        return new Size2D(calculateTotalWidth(contentSize.getWidth()),
                calculateTotalHeight(contentSize.getHeight()));
    }

    /**
     * Draws the title on a Java 2D graphics device (such as the screen or a
     * printer).
     *
     * @param g2  the graphics device.
     * @param area  the area allocated for the title.
     */
    public void draw(Graphics2D g2, Rectangle2D area) {
        draw(g2, area, null);
    }

    /**
     * Draws the block within the specified area.
     *
     * @param g2  the graphics device.
     * @param area  the area.
     * @param params  ignored (<code>null permitted).
     *
     * @return Always <code>null.
     */
    public Object draw(Graphics2D g2, Rectangle2D area, Object params) {
        area = trimMargin(area);
        drawBorder(g2, area);
        area = trimBorder(area);
        if (this.backgroundPaint != null) {
            g2.setPaint(this.backgroundPaint);
            g2.fill(area);
        }
        area = trimPadding(area);
        return this.container.draw(g2, area, params);
    }

    /**
     * Tests this title 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 CompositeTitle)) {
            return false;
        }
        CompositeTitle that = (CompositeTitle) obj;
        if (!this.container.equals(that.container)) {
            return false;
        }
        if (!PaintUtilities.equal(this.backgroundPaint, that.backgroundPaint)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * 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.backgroundPaint, 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.backgroundPaint = SerialUtilities.readPaint(stream);
    }

}

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