PNGFileTools


1   /*
2    * EJTools, the Enterprise Java Tools
3    *
4    * Distributable under LGPL license.
5    * See terms of license at www.gnu.org.
6    */
7   package org.ejtools.util.export;
8   
9   import java.awt.Component  ;
10  import java.awt.image.BufferedImage  ;
11  import java.awt.image.RenderedImage  ;
12  import java.io.File  ;
13  import java.io.IOException  ;
14  import java.util.ResourceBundle  ;
15  
16  import org.apache.log4j.Logger;
17  import org.ejtools.util.FileTools;
18  import org.ejtools.util.Platform;
19  
20  /**
21   * Description of the Class
22   *
23   * @author    Laurent Etiemble
24   * @version   $Revision: 1.2 $
25   */
26  public class PNGFileTools extends FileTools
27  {
28     /** Description of the Field */
29     private static Logger logger = Logger.getLogger(PNGFileTools.class);
30     /** Description of the Field */
31     private static ResourceBundle   resources = ResourceBundle.getBundle("org.ejtools.util.Resources");
32     /** Description of the Field */
33     public final static SimpleFileFilter PNG_FILE_FILTER = new FileTools.SimpleFileFilter(".png", resources.getString("png.file.dialog.extension.description"));
34  
35  
36     /** Constructor for the FileUtil object */
37     protected PNGFileTools() { }
38  
39  
40     /**
41      * Description of the Method
42      *
43      * @param image   Description of the Parameter
44      * @param output  Description of the Parameter
45      */
46     public static void exportAsPNG(RenderedImage   image, File   output)
47     {
48        if (Platform.isJavaVersionCompatible(Platform.JAVA_1_4))
49        {
50           try
51           {
52              // Qualified name is mandatory
53              javax.imageio.ImageIO.write(image, "PNG", output);
54           }
55           catch (IOException   ioe)
56           {
57              logger.error("Can't export image as PNG", ioe);
58           }
59        }
60     }
61  
62  
63     /**
64      * Description of the Method
65      *
66      * @param component  Description of the Parameter
67      * @param output     Description of the Parameter
68      */
69     public static void exportAsPNG(Component   component, File   output)
70     {
71        if (Platform.isJavaVersionCompatible(Platform.JAVA_1_4))
72        {
73           try
74           {
75              BufferedImage   image = paintAsPNG(component);
76              // Qualified name is mandatory
77              javax.imageio.ImageIO.write(image, "PNG", output);
78           }
79           catch (IOException   ioe)
80           {
81              logger.error("Can't export image as PNG", ioe);
82           }
83        }
84     }
85  
86  
87     /**
88      * Description of the Method
89      *
90      * @param component  Description of the Parameter
91      * @return           Description of the Return Value
92      */
93     public static BufferedImage   paintAsPNG(Component   component)
94     {
95        BufferedImage   image = null;
96  
97        image = new BufferedImage  (component.getWidth(), component.getHeight(), BufferedImage.TYPE_INT_ARGB);
98        component.paint(image.getGraphics());
99  
100       return image;
101    }
102 }
103
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