Module java.desktop

Package javax.swing

Class GrayFilter

java.lang.Object

java.awt.image.ImageFilter

java.awt.image.RGBImageFilter

javax.swing.GrayFilter

All Implemented Interfaces:

ImageConsumer, Cloneable

public class GrayFilter
extends RGBImageFilter

An image filter that "disables" an image by turning it into a grayscale image, and brightening the pixels in the image. Used by buttons to create an image for a disabled button.

Since:

1.2

Field Summary

Fields declared in class java.awt.image.RGBImageFilter

canFilterIndexColorModel, newmodel, origmodel

Fields declared in class java.awt.image.ImageFilter

consumer

Fields declared in interface java.awt.image.ImageConsumer

COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT

Constructor Summary

Constructors

Constructor	Description
GrayFilter(boolean b, int p)	Constructs a GrayFilter object that filters a color image to a grayscale image.

Method Summary

Modifier and Type	Method	Description
static Image	createDisabledImage(Image i)	Creates a disabled image
int	filterRGB(int x, int y, int rgb)	Overrides RGBImageFilter.filterRGB.

Methods declared in class java.awt.image.RGBImageFilter

filterIndexColorModel, filterRGBPixels, setColorModel, setPixels, setPixels, substituteColorModel

Methods declared in class java.awt.image.ImageFilter

clone, getFilterInstance, imageComplete, resendTopDownLeftRight, setDimensions, setHints, setProperties

Methods declared in class java.lang.Object

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

Constructor Details

GrayFilter

public GrayFilter(boolean b,
 int p)

Constructs a GrayFilter object that filters a color image to a grayscale image. Used by buttons to create disabled ("grayed out") button images.

Parameters:

b - a boolean -- true if the pixels should be brightened

p - an int in the range 0..100 that determines the percentage of gray, where 100 is the darkest gray, and 0 is the lightest

Method Details

createDisabledImage

public static Image createDisabledImage(Image i)

Creates a disabled image

Parameters:

i - an Image to be created as disabled

Returns:

the new grayscale image created from i

filterRGB

public int filterRGB(int x,
 int y,
 int rgb)

Overrides RGBImageFilter.filterRGB.

Specified by:

filterRGB in class RGBImageFilter

Parameters:

x - the X coordinate of the pixel

y - the Y coordinate of the pixel

rgb - the integer pixel representation in the default RGB color model

Returns:

a filtered pixel in the default RGB color model.

See Also:

• ColorModel.getRGBdefault()
• RGBImageFilter.filterRGBPixels(int, int, int, int, int[], int, int)