ImageObserver.imageUpdate
Interface Overview | Interface Members |
This Package |
All Packages
public abstract boolean imageUpdate( Image img,
int infoflags,
int x,
int y,
int width,
int height )
Description
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.
See Also
getWidth, getHeight, drawImage