1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    * Unless required by applicable law or agreed to in writing, software
   12    * distributed under the License is distributed on an "AS IS" BASIS,
   13    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    * See the License for the specific language governing permissions and
   15    * limitations under the License.
   16    */
   17   package org.apache.pdfbox.pdfviewer;
   18   
   19   import java.awt.Dimension;
   20   import java.awt.Graphics;
   21   
   22   import java.io.IOException;
   23   
   24   import javax.swing.JPanel;
   25   
   26   import org.apache.pdfbox.pdmodel.PDPage;
   27   
   28   import org.apache.pdfbox.pdmodel.common.PDRectangle;
   29   
   30   /**
   31    * This is a simple JPanel that can be used to display a PDF page.
   32    *
   33    * @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
   34    * @version $Revision: 1.4 $
   35    */
   36   public class PDFPagePanel extends JPanel
   37   {
   38   
   39       private PDPage page;
   40       private PageDrawer drawer = null;
   41       private Dimension pageDimension = null;
   42   
   43       /**
   44        * Constructor.
   45        *
   46        * @throws IOException If there is an error creating the Page drawing objects.
   47        */
   48       public PDFPagePanel() throws IOException
   49       {
   50           drawer = new PageDrawer();
   51       }
   52   
   53       /**
   54        * This will set the page that should be displayed in this panel.
   55        *
   56        * @param pdfPage The page to draw.
   57        */
   58       public void setPage( PDPage pdfPage )
   59       {
   60           page = pdfPage;
   61           PDRectangle pageSize = page.findMediaBox();
   62           pageDimension = pageSize.createDimension();
   63           setSize( pageDimension );
   64           setBackground( java.awt.Color.white );
   65       }
   66   
   67       /**
   68        * {@inheritDoc}
   69        */
   70       public void paint(Graphics g )
   71       {
   72           try
   73           {
   74               g.setColor( getBackground() );
   75               g.fillRect( 0, 0, getWidth(), getHeight() );
   76               drawer.drawPage( g, page, pageDimension );
   77           }
   78           catch( IOException e )
   79           {
   80               e.printStackTrace();
   81           }
   82       }
   83   }