public class ColorUtil extends Object
Color
s.Constructor and Description |
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ColorUtil() |
Modifier and Type | Method and Description |
---|---|
static Color |
blend(Color origin,
Color over)
Blends two colors to create a new color.
|
static Color |
computeForeground(Color bg)
Computes an appropriate foreground color (either white or black) for the
given background color.
|
static Paint |
getCheckerPaint()
Obtain a
java.awt.Paint instance which draws a checker
background of black and white. |
static Paint |
getCheckerPaint(Color c1,
Color c2,
int size) |
static Color |
interpolate(Color b,
Color a,
float t) |
static Color |
removeAlpha(Color color)
Returns a new color equal to the old one, except that there is no alpha
(transparency) channel.
|
static Color |
setAlpha(Color color,
int alpha)
Returns a new color equal to the old one, except alpha (transparency)
channel is set to the new value.
|
static Color |
setBrightness(Color color,
float brightness)
Returns a new color equal to the old one, except the brightness is set to
the new value.
|
static Color |
setSaturation(Color color,
float saturation)
Returns a new color equal to the old one, except the saturation is set to
the new value.
|
static void |
tileStretchPaint(Graphics g,
JComponent comp,
BufferedImage img,
Insets ins)
Draws an image on top of a component by doing a 3x3 grid stretch of the image
using the specified insets.
|
static String |
toHexString(Color color)
Creates a
String that represents the supplied color as a
hex-value RGB triplet, including the "#". |
public static Color removeAlpha(Color color)
This method is a convenience and has the same effect as setAlpha(color, 255)
.
color
- the color to remove the alpha (transparency) fromColor
NullPointerException
- if color
is null
public static Color setAlpha(Color color, int alpha)
color
- the color to modifyalpha
- the new alpha (transparency) level. Must be an int between 0
and 255Color
IllegalArgumentException
- if alpha
is not between 0 and 255 inclusiveNullPointerException
- if color
is null
public static Color setSaturation(Color color, float saturation)
The color is modified using HSB calculations. The saturation must be a float between 0 and 1. If 0 the resulting color will be gray. If 1 the resulting color will be the most saturated possible form of the passed in color.
color
- the color to modifysaturation
- the saturation to use in the new colorColor
IllegalArgumentException
- if saturation
is not between 0 and 1 inclusiveNullPointerException
- if color
is null
public static Color setBrightness(Color color, float brightness)
The color is modified using HSB calculations. The brightness must be a float between 0 and 1. If 0 the resulting color will be black. If 1 the resulting color will be the brightest possible form of the passed in color.
color
- the color to modifybrightness
- the brightness to use in the new colorColor
IllegalArgumentException
- if brightness
is not between 0 and 1 inclusiveNullPointerException
- if color
is null
public static String toHexString(Color color)
String
that represents the supplied color as a
hex-value RGB triplet, including the "#". The return value is suitable
for use in HTML. The alpha (transparency) channel is neither include nor
used in producing the string.color
- the color to convertString
public static Color computeForeground(Color bg)
bg
- the background colorColor.WHITE
or Color.BLACK
NullPointerException
- if bg
is null
public static Color blend(Color origin, Color over)
origin
color is the
base for the new color and regardless of its alpha component, it is
treated a fully opaque (alpha 255).origin
- the base of the new colorover
- the alpha-enabled color to add to the origin
colororigin
and over
colorspublic static Paint getCheckerPaint()
java.awt.Paint
instance which draws a checker
background of black and white.
Note: The returned instance may be shared.
Note: This method should be reimplemented to not use a png resource.public static void tileStretchPaint(Graphics g, JComponent comp, BufferedImage img, Insets ins)
TODO this is image related; move to GraphicsUtilities
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