javax.swing
Class GrayFilter

java.lang.Object
  java.awt.image.ImageFilter
      java.awt.image.RGBImageFilter
          javax.swing.GrayFilter

All Implemented Interfaces:

Cloneable, ImageConsumer

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.

Author:

Jeff Dinkins, Tom Ball, Jim Graham

Field Summary

private boolean	brighter
private int	percent

Fields inherited from class java.awt.image.RGBImageFilter

canFilterIndexColorModel, newmodel, origmodel

Fields inherited from class java.awt.image.ImageFilter

consumer

Fields inherited from interface java.awt.image.ImageConsumer

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

Constructor Summary

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

Method Summary

static Image	createDisabledImage(Image i) Creates a disabled image
int	filterRGB(int x, int y, int rgb) Overrides RGBImageFilter.filterRGB.

Methods inherited from class java.awt.image.RGBImageFilter

filterIndexColorModel, filterRGBPixels, setColorModel, setPixels, setPixels, substituteColorModel

Methods inherited from class java.awt.image.ImageFilter

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

Methods inherited from class java.lang.Object

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

Field Detail

brighter

private boolean brighter

percent

private int percent

Constructor Detail

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 Detail

createDisabledImage

public static Image createDisabledImage(Image i)

Creates a disabled image

filterRGB

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

Overrides RGBImageFilter.filterRGB.

Specified by:

filterRGB in class RGBImageFilter

Parameters:

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)