gradientpaintwritehandler.java

这是一个segy数据显示程序

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/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.]
 * 
 * ------------------------------
 * GradientPaintWriteHandler.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: GradientPaintWriteHandler.java,v 1.8 2004/04/26 19:15:51 taqua Exp $
 *
 * Changes
 * -------
 * 12-Nov-2003 : Initial version (TM);
 * 23-Dec-2003 : Updated header (DG);
 * 
 */

package org.jfree.xml.writer.coretypes;

import java.awt.GradientPaint;
import java.awt.Color;
import java.awt.geom.Point2D;
import java.io.IOException;

import org.jfree.xml.writer.XMLWriter;
import org.jfree.xml.writer.AbstractXmlWriteHandler;
import org.jfree.xml.writer.RootXmlWriteHandler;
import org.jfree.xml.writer.XMLWriterException;

/**
 * A handler for writing {@link GradientPaint} objects.
 */
public class GradientPaintWriteHandler extends AbstractXmlWriteHandler  {

    /**
     * Default constructor.
     */
    public GradientPaintWriteHandler() {
        super();
    }

    /**
     * Performs the writing of a {@link GradientPaint} object.
     *
     * @param tagName  the tag name.
     * @param object  the {@link GradientPaint} object.
     * @param writer  the writer.
     * @param mPlexAttribute  ??.
     * @param mPlexValue  ??.
     * 
     * @throws IOException if there is an I/O error.
     * @throws XMLWriterException if there is a writer error.
     */
    public void write(final String tagName, final Object object, final XMLWriter writer,
                      final String mPlexAttribute, final String mPlexValue)
        throws IOException, XMLWriterException {
        final GradientPaint paint = (GradientPaint) object;
        writer.writeTag(tagName, mPlexAttribute, mPlexValue, false);
        writer.startBlock();
        final RootXmlWriteHandler rootHandler = getRootHandler();
        rootHandler.write("color1", paint.getColor1(), Color.class, writer);
        writer.allowLineBreak();
        rootHandler.write("color2", paint.getColor2(), Color.class, writer);
        writer.allowLineBreak();
        rootHandler.write("point1", paint.getPoint1(), Point2D.class, writer);
        writer.allowLineBreak();
        rootHandler.write("point2", paint.getPoint2(), Point2D.class, writer);
        writer.endBlock();
        writer.writeCloseTag(tagName);        
    }
}