net.lucidviews.util.image
Class SimpleImageObserver

java.lang.Object
  net.lucidviews.util.image.BaseImageObserver
      net.lucidviews.util.image.SimpleImageObserver

All Implemented Interfaces:

ImageObserver

public class SimpleImageObserver
extends BaseImageObserver

A simple image observer.
This ImageObserver takes no action when the imageUpdate method is called, but responds with the value true (keep loading image data) until the image has completely loaded.

Since:

1.0

Version:

$Revision: 1.3 $

Author:

Stephen Battey

See Also:

ImageObserver, Image

Nested Class Summary

Nested classes/interfaces inherited from class net.lucidviews.util.image.BaseImageObserver

BaseImageObserver.RespawnTimerTask

Field Summary

static SimpleImageObserver

INSTANCE A convenient reference to an instance of this observer.

Fields inherited from class net.lucidviews.util.image.BaseImageObserver

_image, FORCE_RESPAWN_DELAY

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

SimpleImageObserver()

Method Summary

boolean

observedImageUpdate(Image img, int infoflags, int x, int y, int width, int height) This method is called when information about the image that is being observed, and was previously requested using an asynchronous interface, becomes available.

Methods inherited from class net.lucidviews.util.image.BaseImageObserver

imageUpdate

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final SimpleImageObserver INSTANCE

A convenient reference to an instance of this observer.

Constructor Detail

SimpleImageObserver

public SimpleImageObserver()

Method Detail

observedImageUpdate

public boolean observedImageUpdate(Image img,
                                   int infoflags,
                                   int x,
                                   int y,
                                   int width,
                                   int height)

Description copied from class: BaseImageObserver

This method is called when information about the image that is being observed, and was previously requested using an asynchronous interface, becomes available.

This method should return true if further updates are needed or false if the required information has been acquired. The image which was being tracked is passed in using the img argument. Various constants are combined to form the infoflags argument which indicates what information about the image is now available. The interpretation of the x, y, width, and height arguments depends on the contents of the infoflags argument.

The infoflags argument should be the bitwise inclusive OR of the following flags: WIDTH, HEIGHT, PROPERTIES, SOMEBITS, FRAMEBITS, ALLBITS, ERROR, ABORT.

Specified by:

observedImageUpdate in class BaseImageObserver

Parameters:

img - the image being observed

infoflags - the bitwise inclusive OR of the following flags: WIDTH, HEIGHT, PROPERTIES, SOMEBITS, FRAMEBITS, ALLBITS, ERROR, ABORT

x - the x coordinate

y - the y coordinate

width - the width

height - the height

Returns:

false if the infoflags indicate that the image is completely loaded; true otherwise