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

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:

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https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/javax/swing/GrayFilter.html