java.awt

Class ImageMediaEntry [ source ]

java.lang.Object

java.awt.MediaEntry

java.awt.ImageMediaEntry

All Implemented Interfaces:

ImageObserver, Serializable

 class ImageMediaEntry
extends MediaEntry
implements ImageObserver, Serializable

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	height
(package private) Image	image
(package private) int	width

Fields inherited from class java.awt.MediaEntry

ABORTED, cancelled, COMPLETE, DONE, ERRORED, ID, LOADING, LOADSTARTED, next, status, tracker

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

Constructors

Constructor and Description
ImageMediaEntry(MediaTracker mt, Image img, int c, int w, int h)

Method Summary

Methods

Modifier and Type	Method and Description
(package private) Object	getMedia()
(package private) int	getStatus(boolean doLoad, boolean doVerify)
boolean	imageUpdate(Image img, int infoflags, int x, int y, int w, int h) This method is called when information about an image which was previously requested using an asynchronous interface becomes available.
(package private) boolean	matches(Image img, int w, int h)
(package private) int	parseflags(int infoflags)
(package private) void	startLoad()

Methods inherited from class java.awt.MediaEntry

cancel, getID, insert, setStatus

Methods inherited from class java.lang.Object

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

Field Detail

image

Image image

width

int width

height

int height

Constructor Detail

ImageMediaEntry

ImageMediaEntry(MediaTracker mt,
               Image img,
               int c,
               int w,
               int h)

Method Detail

matches

boolean matches(Image img,
              int w,
              int h)

getMedia

Object getMedia()

Specified by:

getMedia in class MediaEntry

getStatus

int getStatus(boolean doLoad,
            boolean doVerify)

Overrides:

getStatus in class MediaEntry

startLoad

void startLoad()

Specified by:

startLoad in class MediaEntry

parseflags

int parseflags(int infoflags)

imageUpdate

public boolean imageUpdate(Image img,
                  int infoflags,
                  int x,
                  int y,
                  int w,
                  int h)

Description copied from interface: ImageObserver

This method is called when information about an image which was previously requested using an asynchronous interface becomes available. Asynchronous interfaces are method calls such as getWidth(ImageObserver) and drawImage(img, x, y, ImageObserver) which take an ImageObserver object as an argument. Those methods register the caller as interested either in information about the overall image itself (in the case of getWidth(ImageObserver)) or about an output version of an image (in the case of the drawImage(img, x, y, [w, h,] ImageObserver) call).

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:

imageUpdate in interface ImageObserver

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.

w - the width.

h - the height.

Returns:

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

See Also:

ImageObserver.WIDTH, ImageObserver.HEIGHT, ImageObserver.PROPERTIES, ImageObserver.SOMEBITS, ImageObserver.FRAMEBITS, ImageObserver.ALLBITS, ImageObserver.ERROR, ImageObserver.ABORT, Image.getWidth(java.awt.image.ImageObserver), Image.getHeight(java.awt.image.ImageObserver), Graphics.drawImage(java.awt.Image, int, int, java.awt.image.ImageObserver)