GrayFilter (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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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.

Field Summary

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

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)