KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > pdfbox > pdfviewer > PDFPagePanel


1 /**
2  * Copyright (c) 2004-2006, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.pdfviewer;
32
33 import java.awt.Dimension JavaDoc;
34 import java.awt.Graphics JavaDoc;
35
36 import java.io.IOException JavaDoc;
37
38 import javax.swing.JPanel JavaDoc;
39
40 import org.pdfbox.pdmodel.PDPage;
41
42 import org.pdfbox.pdmodel.common.PDRectangle;
43
44 /**
45  * This is a simple JPanel that can be used to display a PDF page.
46  *
47  * @author <a HREF="mailto:ben@benlitchfield.com">Ben Litchfield</a>
48  * @version $Revision: 1.4 $
49  */
50 public class PDFPagePanel extends JPanel JavaDoc
51 {
52
53     private PDPage page;
54     private PageDrawer drawer = null;
55     private Dimension JavaDoc pageDimension = null;
56
57     /**
58      * Constructor.
59      *
60      * @throws IOException If there is an error creating the Page drawing objects.
61      */
62     public PDFPagePanel() throws IOException JavaDoc
63     {
64         drawer = new PageDrawer();
65     }
66
67     /**
68      * This will set the page that should be displayed in this panel.
69      *
70      * @param pdfPage The page to draw.
71      */
72     public void setPage( PDPage pdfPage )
73     {
74         page = pdfPage;
75         PDRectangle pageSize = page.findMediaBox();
76         int rotation = page.findRotation();
77         pageDimension = pageSize.createDimension();
78         if( rotation == 90 || rotation == 270 )
79         {
80             pageDimension = new Dimension JavaDoc( pageDimension.height, pageDimension.width );
81         }
82         setSize( pageDimension );
83         setBackground( java.awt.Color.white );
84     }
85
86     /**
87      * {@inheritDoc}
88      */
89     public void paint(Graphics JavaDoc g )
90     {
91         try
92         {
93             g.setColor( getBackground() );
94             g.fillRect( 0, 0, getWidth(), getHeight() );
95             drawer.drawPage( g, page, pageDimension );
96         }
97         catch( IOException JavaDoc e )
98         {
99             e.printStackTrace();
100         }
101     }
102 }
Popular Tags