org.squidy.designer.components.pdf.PDFPane.java Source code

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Here is the source code for org.squidy.designer.components.pdf.PDFPane.java

Source

/**
 * Squidy Interaction 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 3 of the License,
 * or (at your option) any later version.
 * 
 * Squidy Interaction 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 Squidy Interaction Library. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * 2009 Human-Computer Interaction Group, University of Konstanz.
 * <http://hci.uni-konstanz.de>
 * 
 * Please contact info@squidy-lib.de or visit our website
 * <http://www.squidy-lib.de> for further information.
 */

package org.squidy.designer.components.pdf;

import java.awt.Color;
import java.awt.Dimension;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PagePanel;

import edu.umd.cs.piccolo.PNode;
import edu.umd.cs.piccolox.pswing.PSwing;

public class PDFPane extends PNode {

    /**
     * 
     */
    private static final long serialVersionUID = 2806101138711805130L;

    // Logger to info, error, debug,... messages.
    private static final Log LOG = LogFactory.getLog(PDFPane.class);

    private PagePanel[] pdfComponents;
    private int pageHeight;
    private int pageWidth;

    public PDFPane(String pdfFileLoc) {
        super();
        try {
            // load a pdf from a byte buffer
            File file = new File(pdfFileLoc);
            RandomAccessFile raf = new RandomAccessFile(file, "r");
            FileChannel channel = raf.getChannel();
            ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
            PDFFile pdffile = new PDFFile(buf);
            pdfComponents = new PagePanel[pdffile.getNumPages()];
            pageHeight = (int) pdffile.getPage(0).getHeight() + 3;
            pageWidth = (int) pdffile.getPage(0).getWidth() + 1;

            for (int i = 0; i < pdfComponents.length; i++) {
                PagePanel p = new PagePanel();
                p.setBackground(Color.BLACK);
                p.setPreferredSize(new Dimension(pageWidth, pageHeight));
                PSwing ps = new PSwing(p);

                ps.setOffset(0, i * pageHeight);
                addChild(ps);
                p.showPage(pdffile.getPage(i));
            }
        } catch (IOException e) {
            if (LOG.isErrorEnabled()) {
                LOG.error("Error in " + PDFPane.class.getName() + ".", e);
            }
            System.out.println(e.getMessage());
        }
    }
}