com.vaadin.ui.components.colorpicker

Class ColorUtil

java.lang.Object

com.vaadin.ui.components.colorpicker.ColorUtil

public class ColorUtil
extends Object

Utility class for matching and parsing Color objects from String input. Description of supported formats see http://www.w3schools.com/cssref/css_colors_legal.asp

Since:

8.4

Field Summary

Fields

Modifier and Type	Field and Description
static Pattern	HEX_PATTERN Case-insensitive Pattern with regular expression matching the default hexadecimal color presentation pattern: '#' followed by six [\da-fA-F] characters.
static Pattern	HSL_PATTERN Case-insensitive Pattern with regular expression matching common HSL presentation patterns: 'hsl' followed by one [0-360] value and two [0-100] percentage value.
static Pattern	HSLA_PATTERN Case-insensitive Pattern with regular expression matching common HSLA presentation patterns: 'hsla' followed by one [0-360] value, two [0-100] percentage values, and one [0.0-1.0] value.
static Pattern	RGB_PATTERN Case-insensitive Pattern with regular expression matching common RGB color presentation patterns: 'rgb' followed by three [0-255] number values.
static Pattern	RGBA_PATTERN Case-insensitive Pattern with regular expression matching common RGBA presentation patterns: 'rgba' followed by three [0-255] values and one [0.0-1.0] value.

Method Summary

Modifier and Type	Method and Description
static Color	getHexPatternColor(Matcher matcher) Parses Color from matched hexadecimal Matcher.
static Color	getHSLAPatternColor(Matcher matcher) Parses Color from matched HSLA Matcher.
static Color	getHSLPatternColor(Matcher matcher) Parses Color from matched HSL Matcher.
static Color	getRGBAPatternColor(Matcher matcher) Parses Color from matched RGBA Matcher.
static Color	getRGBPatternColor(Matcher matcher) Parses Color from matched RGB Matcher.
static Color	stringToColor(String input) Parses Color from any of the following String inputs: - RGB hex (e.g.

Methods inherited from class java.lang.Object

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

Field Detail

HEX_PATTERN

public static final Pattern HEX_PATTERN

Case-insensitive Pattern with regular expression matching the default hexadecimal color presentation pattern:
'#' followed by six [\da-fA-F] characters.

Pattern contains named groups red, green, and blue, which represent the individual values.

RGB_PATTERN

public static final Pattern RGB_PATTERN

Case-insensitive Pattern with regular expression matching common RGB color presentation patterns:
'rgb' followed by three [0-255] number values. Values can be separated with either comma or whitespace.

Pattern contains named groups red, green, and blue, which represent the individual values.

RGBA_PATTERN

public static final Pattern RGBA_PATTERN

Case-insensitive Pattern with regular expression matching common RGBA presentation patterns:
'rgba' followed by three [0-255] values and one [0.0-1.0] value. Values can be separated with either comma or whitespace. The only accepted decimal marker is point ('.').

Pattern contains named groups red, green, blue, and alpha, which represent the individual values.

HSL_PATTERN

public static final Pattern HSL_PATTERN

Case-insensitive Pattern with regular expression matching common HSL presentation patterns:
'hsl' followed by one [0-360] value and two [0-100] percentage value. Values can be separated with either comma or whitespace. The percent sign ('%') is optional.

Pattern contains named groups hue,saturation, and light, which represent the individual values.

HSLA_PATTERN

public static final Pattern HSLA_PATTERN

Case-insensitive Pattern with regular expression matching common HSLA presentation patterns:
'hsla' followed by one [0-360] value, two [0-100] percentage values, and one [0.0-1.0] value. Values can be separated with either comma or whitespace. The percent sign ('%') is optional. The only accepted decimal marker is point ('.').

Pattern contains named groups hue,saturation, light, and alpha, which represent the individual values.

Method Detail

stringToColor

public static Color stringToColor(String input)

Parses Color from any of the following String inputs:
- RGB hex (e.g. "#FFAA00"), HEX_PATTERN
- RGB "function" (e.g. "rgb(128,0,255)"), RGB_PATTERN
- RGBA "function" (e.g. "rgba(50,50,50,0.2)"), RGBA_PATTERN
- HSL "function" (e.g. "hsl(50,50,50)"), HSL_PATTERN
- HSLA "function" (e.g. "hsl(50,50,50,0.2)"), HSLA_PATTERN

Parsing is case-insensitive.

Parameters:

input - String input

Returns:

Color parsed from input

Throws:

NumberFormatException - Input does not match any recognized pattern

getHexPatternColor

public static Color getHexPatternColor(Matcher matcher)

Parses Color from matched hexadecimal Matcher.

Parameters:

matcher - Matcher matching hexadecimal pattern with named regex groups red, green, and blue

Returns:

Color parsed from Matcher

getRGBPatternColor

public static Color getRGBPatternColor(Matcher matcher)

Parses Color from matched RGB Matcher.

Parameters:

matcher - Matcher matching RGB pattern with named regex groups red, green, and blue

Returns:

Color parsed from Matcher

getRGBAPatternColor

public static Color getRGBAPatternColor(Matcher matcher)

Parses Color from matched RGBA Matcher.

Parameters:

matcher - Matcher matching RGBA pattern with named regex groups red, green, blue, and alpha

Returns:

Color parsed from Matcher

getHSLPatternColor

public static Color getHSLPatternColor(Matcher matcher)

Parses Color from matched HSL Matcher.

Parameters:

matcher - Matcher matching HSL pattern with named regex groups hue, saturation, and light

Returns:

Color parsed from Matcher

getHSLAPatternColor

public static Color getHSLAPatternColor(Matcher matcher)

Parses Color from matched HSLA Matcher.

Parameters:

matcher - Matcher matching HSLA pattern with named regex groups hue, saturation, light, and alpha

Returns:

Color parsed from Matcher