com.creamtec.ajaxswing.v4.render
Class SnapshotRenderer

java.lang.Object
  com.creamtec.ajaxswing.v4.render.SnapshotRenderer

All Implemented Interfaces:

ComponentRenderer, java.util.Observer

public class SnapshotRenderer
extends java.lang.Object
implements java.util.Observer, ComponentRenderer

Generates an image and makes the component draw itself into it. The image is then saved in a temporary directory and a link is added to it on the HTML page.

Constructor Summary

SnapshotRenderer()

Method Summary

java.awt.image.BufferedImage	generateIconImage(HTMLPage page, java.awt.Component comp, javax.swing.Icon icon) Generate and return the snapshot image of the icon
java.lang.String	generateIconImageFile(HTMLPage page, java.awt.image.BufferedImage image, boolean keepUntilRestart)
java.awt.image.BufferedImage	generateImage(HTMLPage page, java.awt.Component comp) Generate and return the snapshot image of the component
static SnapshotRenderer	getInstance()
void	initialize()
void	renderComponent(ComponentGraphics g, java.awt.Component comp)
void	update(java.util.Observable o, java.lang.Object arg) Called when the page is being cleared, so clean up generated images
void	writePNGImage(HTMLPage page, java.lang.String fileName, java.awt.image.BufferedImage image) Persist the image into the file on disk

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SnapshotRenderer

public SnapshotRenderer()

Method Detail

getInstance

public static SnapshotRenderer getInstance()

initialize

public void initialize()

Specified by:

initialize in interface ComponentRenderer

renderComponent

public void renderComponent(ComponentGraphics g,
                            java.awt.Component comp)
                     throws java.lang.Exception

Specified by:

renderComponent in interface ComponentRenderer

Throws:

java.lang.Exception

generateIconImage

public java.awt.image.BufferedImage generateIconImage(HTMLPage page,
                                                      java.awt.Component comp,
                                                      javax.swing.Icon icon)
                                               throws AjaxSwingException

Generate and return the snapshot image of the icon

Throws:

AjaxSwingException

generateIconImageFile

public java.lang.String generateIconImageFile(HTMLPage page,
                                              java.awt.image.BufferedImage image,
                                              boolean keepUntilRestart)

generateImage

public java.awt.image.BufferedImage generateImage(HTMLPage page,
                                                  java.awt.Component comp)
                                           throws AjaxSwingException

Generate and return the snapshot image of the component

Throws:

AjaxSwingException

update

public void update(java.util.Observable o,
                   java.lang.Object arg)

Called when the page is being cleared, so clean up generated images

Specified by:

update in interface java.util.Observer

writePNGImage

public void writePNGImage(HTMLPage page,
                          java.lang.String fileName,
                          java.awt.image.BufferedImage image)
                   throws java.lang.Exception

Persist the image into the file on disk

Throws:

java.lang.Exception