IlvColorUtil (Rogue Wave JViews 9.2 API)

java.lang.Object
- ilog.views.util.IlvColorUtil

Direct Known Subclasses:

IlvColor
```
public class IlvColorUtil
extends Object
```
The IlvColorUtil class consists of static methods that are of general use when working with colors. This class defines a color map that consists of keyword/color pairs. These colors correspond to the predefined color names that are recognized by the SVG specification; see http://www.w3.org /TR/SVG/types.html#ColorKeywords.
The color names defined in SVG take over the ones in Java. For instance, gray, green, and orange are not the same in the two color spaces. It is possible to control this behavior through the (@link #setJavaNamesFirst javaNamesFirst} method.

Since:

JViews 5.5

Constructor Summary

Constructors
Modifier Constructor and Description

protected IlvColorUtil()
Singleton class.

Constructors
Modifier	Constructor and Description
`protected`	`IlvColorUtil()` Singleton class.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`addColor(String name, Color color)` Adds a new named color to the color map.
`static Color`	`brighter(Color c)` Returns a brighter version of the specified color.
`static Color`	`darker(Color c)` Returns a darker version of the specified color.
`static float`	`getBrightness(Color c)` Returns the brightness of the specified color.
`static Color`	`getColor(String colorName)` Returns a named color from the color map.
`static Map<String,Color>`	`getColorMap()` Returns the color map.
`static float`	`getHue(Color c)` Returns the hue of the specified color.
`static float`	`getLuminance(Color color)` Returns the luminance of the specified color.
`static Color`	`getRandomColor()` Creates a random color.
`static float`	`getSaturation(Color c)` Returns the saturation of the specified color.
`static boolean`	`isJavaNamesFirst()` Returns whether Java color names take over SVG color names.
`static Color`	`setAlpha(Color c, float alpha)` Returns a color with a modified alpha value.
`static Color`	`setBrightness(Color c, float brightness)` Returns a color with a modified brightness.
`static Color`	`setHue(Color c, float hue)` Returns a color with a modified hue.
`static void`	`setJavaNamesFirst(boolean val)` Specifies whether Java colors take over the SVG color definition.
`static Color`	`setSaturation(Color c, float saturation)` Returns a color with a modified saturation.
`static Color`	`slightlyBrighter(Color c)` Returns a slightly brighter version of the specified color.
`static Color`	`slightlyDarker(Color c)` Returns a slightly darker version of the specified color.
`static Color`	`toColor(String text)` Returns the color corresponding to the specified string.
`static String`	`toHumanReadableString(Color c)` Returns a string representation of the specified color.
`static String`	`toString(Color c)` Returns a string representation of the specified color.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - IlvColorUtil
```
protected IlvColorUtil()
```
    Singleton class.
- Method Detail
  - addColor
```
public static void addColor(String name,
                            Color color)
```
    Adds a new named color to the color map.
    
    Parameters:
    
    name - The name of the color.
    
    color - The color.
  - getColorMap
```
public static Map<String,Color> getColorMap()
```
    Returns the color map.
    
    Returns:
    
    An unmodifiable version of the internal color map. Each entry of the color map is made of a string key that represents the color name and of the color itself.
    
    See Also:
    
    addColor(java.lang.String, java.awt.Color)
  - setJavaNamesFirst
```
public static void setJavaNamesFirst(boolean val)
```
    Specifies whether Java colors take over the SVG color definition.
    
    Parameters:
    
    val - The boolean specification.
  - isJavaNamesFirst
```
public static boolean isJavaNamesFirst()
```
    Returns whether Java color names take over SVG color names.
    
    See Also:
    
    setJavaNamesFirst(boolean)
  - getColor
```
public static final Color getColor(String colorName)
```
    Returns a named color from the color map.
    
    Parameters:
    
    colorName - The name of the color.
    
    Returns:
    
    The color associated with the specified name, or null if the name is not registered in the color map.
  - getRandomColor
```
public static Color getRandomColor()
```
    Creates a random color.
  - setAlpha
```
public static Color setAlpha(Color c,
                             float alpha)
```
    Returns a color with a modified alpha value.
    
    Parameters:
    
    c - The original color.
    
    alpha - The new alpha value, in the range [0 .. 1].
    
    Returns:
    
    A new color with the modified alpha value.
  - getBrightness
```
public static float getBrightness(Color c)
```
    Returns the brightness of the specified color.
    Note: This function returns the maximum of the three components (red, green, blue), as a floating-point value between 0 and 1. It does not reflect the brightness at it appears to the human eye; for this, see getLuminance(java.awt.Color).
    
    Parameters:
    
    c - The color.
    
    Returns:
    
    The brightness of the color.
  - setBrightness
```
public static Color setBrightness(Color c,
                                  float brightness)
```
    Returns a color with a modified brightness.
    
    Parameters:
    
    c - The original color.
    
    brightness - The new brightness value, in the range [0 .. 1].
    
    Returns:
    
    A new color with the modified brightness.
  - getSaturation
```
public static float getSaturation(Color c)
```
    Returns the saturation of the specified color.
    
    Parameters:
    
    c - The color.
    
    Returns:
    
    The saturation of the color.
  - setSaturation
```
public static Color setSaturation(Color c,
                                  float saturation)
```
    Returns a color with a modified saturation.
    
    Parameters:
    
    c - The original color.
    
    saturation - The new saturation value, in the range [0 .. 1].
    
    Returns:
    
    A new color with the modified saturation.
  - getHue
```
public static float getHue(Color c)
```
    Returns the hue of the specified color.
    
    Parameters:
    
    c - The color.
    
    Returns:
    
    The hue of the color.
  - setHue
```
public static Color setHue(Color c,
                           float hue)
```
    Returns a color with a modified hue.
    
    Parameters:
    
    c - The original color.
    
    hue - The new hue value, in the range [0 .. 1].
    
    Returns:
    
    A new color with the modified hue.
  - brighter
```
public static Color brighter(Color c)
```
    Returns a brighter version of the specified color.
    
    Parameters:
    
    c - The original color.
    
    Returns:
    
    A brighter version of the specified color.
  - slightlyBrighter
```
public static Color slightlyBrighter(Color c)
```
    Returns a slightly brighter version of the specified color.
    
    Parameters:
    
    c - The original color.
    
    Returns:
    
    A slightly brighter version of the specified color.
  - darker
```
public static Color darker(Color c)
```
    Returns a darker version of the specified color.
    
    Parameters:
    
    c - The original color.
    
    Returns:
    
    A darker version of the specified color.
  - slightlyDarker
```
public static Color slightlyDarker(Color c)
```
    Returns a slightly darker version of the specified color.
    
    Parameters:
    
    c - The original color.
    
    Returns:
    
    A slightly darker version of the specified color.
  - getLuminance
```
public static float getLuminance(Color color)
```
    Returns the luminance of the specified color. This is the brightness of the color, as it appears to the human eye.
    This function is suitable for color to grayscale conversion.
    
    Returns:
    
    A floating-point value between 0 and 1.
    
    Since:
    
    JViews 8.0
    
    See Also:
    
    getBrightness(java.awt.Color)
  - toColor
```
public static Color toColor(String text)
                     throws IllegalArgumentException
```
    Returns the color corresponding to the specified string.
    The specified string can have the following forms:
    - The name of a color registered in the color map (see getColorMap()).
    - Hexadecimal form: #aarrggbb or #rrggbb.
    - RGB components (in the range [0,255]): r,g,b.
    Parameters:
    
    text - The string to parse.
    
    Returns:
    
    The color corresponding to the specified string.
    
    Throws:
    
    IllegalArgumentException - The specified string cannot be parsed.
    
    See Also:
    
    toString(java.awt.Color)
  - toHumanReadableString
```
public static String toHumanReadableString(Color c)
```
    Returns a string representation of the specified color.
    
    Parameters:
    
    c - The considered color.
    
    Returns:
    
    the color name when found, otherwise RGB triple, or hexadecimal form when alpha is > 0
    
    Since:
    
    JViews 6.5
    
    See Also:
    
    toColor(java.lang.String)
  - toString
```
public static String toString(Color c)
```
    Returns a string representation of the specified color.
    
    Parameters:
    
    c - The considered color.
    
    Returns:
    
    The string representation of the color, in hexadecimal form.
    
    See Also:
    
    toColor(java.lang.String)

Class IlvColorUtil

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

IlvColorUtil

Method Detail

addColor

getColorMap

setJavaNamesFirst

isJavaNamesFirst

getColor

getRandomColor

setAlpha

getBrightness

setBrightness

getSaturation

setSaturation

getHue

setHue

brighter

slightlyBrighter

darker

slightlyDarker

getLuminance

toColor

toHumanReadableString

toString