documentdescriptorrenderer.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache",
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 */

package org.apache.poi.contrib.poibrowser;

import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;

/**
 * <p>{@link TreeCellRenderer} for a {@link DocumentDescriptor}. The
 * renderer is extremly rudimentary since displays only the document's
 * name, its size and its fist few bytes.</p>
 *
 * @author Rainer Klute ([e-mail])
 * @version $Id: DocumentDescriptorRenderer.java,v 1.1 2002/02/14 04:00:58 mjohnson Exp $
 * @since 2002-02-05
 */
public class DocumentDescriptorRenderer extends DefaultTreeCellRenderer
{

    public Component getTreeCellRendererComponent(final JTree tree,
                                                  final Object value,
                                                  final boolean selected,
                                                  final boolean expanded,
                                                  final boolean leaf,
                                                  final int row,
                                                  final boolean hasFocus)
    {
        final DocumentDescriptor d = (DocumentDescriptor)
            ((DefaultMutableTreeNode) value).getUserObject();
        final JPanel p = new JPanel();
        final JTextArea text = new JTextArea();
        text.append(renderAsString(d));
        text.setFont(new Font("Monospaced", Font.PLAIN, 10));
        p.add(text);
        if (selected)
            Util.invert(text);
        return p;
    }


    /**
     * <p>Renders {@link DocumentDescriptor} as a string.</p>
     */
    protected String renderAsString(final DocumentDescriptor d)
    {
        final StringBuffer b = new StringBuffer();
        b.append("Name: ");
        b.append(d.name);
        b.append(" (");
        b.append(Codec.hexEncode(d.name));
        b.append(")  \n");

        b.append("Size: ");
        b.append(d.size);
        b.append(" bytes\n");

        b.append("First bytes: ");
        b.append(Codec.hexEncode(d.bytes));

        return b.toString();
    }

}