Class: Rubyvis::Color

Inherits:
Object show all
Defined in:
lib/rubyvis/color/color.rb

Overview

Represents an abstract (possibly translucent) color. The color is divided into two parts: the color attribute, an opaque color format string, and the opacity attribute, a float in [0, 1]. The color space is dependent on the implementing class; all colors support the Color.rgb() method to convert to RGB color space for interpolation.

Direct Known Subclasses

Hsl, Rgb

Defined Under Namespace

Classes: Hsl, Rgb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(color, opacity) ⇒ Color

Constructs a color with the specified color format string and opacity. This constructor should not be invoked directly; use Rubyvis.color instead.



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# File 'lib/rubyvis/color/color.rb', line 98

def initialize(color,opacity)
  @color=color
  @opacity=opacity
end

Instance Attribute Details

#color ⇒ Object (readonly)

An opaque color format string, such as “#f00”.



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# File 'lib/rubyvis/color/color.rb', line 92

def color
  @color
end

#opacity ⇒ Object (readonly)

The opacity, a float in [0, 1].



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# File 'lib/rubyvis/color/color.rb', line 94

def opacity
  @opacity
end

Class Method Details

.names ⇒ Object

Association between names and colors



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# File 'lib/rubyvis/color/color.rb', line 124

def self.names # :nodoc:
  {
    :aliceblue=>"#f0f8ff",
    :antiquewhite=>"#faebd7",
    :aqua=>"#00ffff",
    :aquamarine=>"#7fffd4",
    :azure=>"#f0ffff",
    :beige=>"#f5f5dc",
    :bisque=>"#ffe4c4",
    :black=>"#000000",
    :blanchedalmond=>"#ffebcd",
    :blue=>"#0000ff",
    :blueviolet=>"#8a2be2",
    :brown=>"#a52a2a",
    :burlywood=>"#deb887",
    :cadetblue=>"#5f9ea0",
    :chartreuse=>"#7fff00",
    :chocolate=>"#d2691e",
    :coral=>"#ff7f50",
    :cornflowerblue=>"#6495ed",
    :cornsilk=>"#fff8dc",
    :crimson=>"#dc143c",
    :cyan=>"#00ffff",
    :darkblue=>"#00008b",
    :darkcyan=>"#008b8b",
    :darkgoldenrod=>"#b8860b",
    :darkgray=>"#a9a9a9",
    :darkgreen=>"#006400",
    :darkgrey=>"#a9a9a9",
    :darkkhaki=>"#bdb76b",
    :darkmagenta=>"#8b008b",
    :darkolivegreen=>"#556b2f",
    :darkorange=>"#ff8c00",
    :darkorchid=>"#9932cc",
    :darkred=>"#8b0000",
    :darksalmon=>"#e9967a",
    :darkseagreen=>"#8fbc8f",
    :darkslateblue=>"#483d8b",
    :darkslategray=>"#2f4f4f",
    :darkslategrey=>"#2f4f4f",
    :darkturquoise=>"#00ced1",
    :darkviolet=>"#9400d3",
    :deeppink=>"#ff1493",
    :deepskyblue=>"#00bfff",
    :dimgray=>"#696969",
    :dimgrey=>"#696969",
    :dodgerblue=>"#1e90ff",
    :firebrick=>"#b22222",
    :floralwhite=>"#fffaf0",
    :forestgreen=>"#228b22",
    :fuchsia=>"#ff00ff",
    :gainsboro=>"#dcdcdc",
    :ghostwhite=>"#f8f8ff",
    :gold=>"#ffd700",
    :goldenrod=>"#daa520",
    :gray=>"#808080",
    :green=>"#008000",
    :greenyellow=>"#adff2f",
    :grey=>"#808080",
    :honeydew=>"#f0fff0",
    :hotpink=>"#ff69b4",
    :indianred=>"#cd5c5c",
    :indigo=>"#4b0082",
    :ivory=>"#fffff0",
    :khaki=>"#f0e68c",
    :lavender=>"#e6e6fa",
    :lavenderblush=>"#fff0f5",
    :lawngreen=>"#7cfc00",
    :lemonchiffon=>"#fffacd",
    :lightblue=>"#add8e6",
    :lightcoral=>"#f08080",
    :lightcyan=>"#e0ffff",
    :lightgoldenrodyellow=>"#fafad2",
    :lightgray=>"#d3d3d3",
    :lightgreen=>"#90ee90",
    :lightgrey=>"#d3d3d3",
    :lightpink=>"#ffb6c1",
    :lightsalmon=>"#ffa07a",
    :lightseagreen=>"#20b2aa",
    :lightskyblue=>"#87cefa",
    :lightslategray=>"#778899",
    :lightslategrey=>"#778899",
    :lightsteelblue=>"#b0c4de",
    :lightyellow=>"#ffffe0",
    :lime=>"#00ff00",
    :limegreen=>"#32cd32",
    :linen=>"#faf0e6",
    :magenta=>"#ff00ff",
    :maroon=>"#800000",
    :mediumaquamarine=>"#66cdaa",
    :mediumblue=>"#0000cd",
    :mediumorchid=>"#ba55d3",
    :mediumpurple=>"#9370db",
    :mediumseagreen=>"#3cb371",
    :mediumslateblue=>"#7b68ee",
    :mediumspringgreen=>"#00fa9a",
    :mediumturquoise=>"#48d1cc",
    :mediumvioletred=>"#c71585",
    :midnightblue=>"#191970",
    :mintcream=>"#f5fffa",
    :mistyrose=>"#ffe4e1",
    :moccasin=>"#ffe4b5",
    :navajowhite=>"#ffdead",
    :navy=>"#000080",
    :oldlace=>"#fdf5e6",
    :olive=>"#808000",
    :olivedrab=>"#6b8e23",
    :orange=>"#ffa500",
    :orangered=>"#ff4500",
    :orchid=>"#da70d6",
    :palegoldenrod=>"#eee8aa",
    :palegreen=>"#98fb98",
    :paleturquoise=>"#afeeee",
    :palevioletred=>"#db7093",
    :papayawhip=>"#ffefd5",
    :peachpuff=>"#ffdab9",
    :peru=>"#cd853f",
    :pink=>"#ffc0cb",
    :plum=>"#dda0dd",
    :powderblue=>"#b0e0e6",
    :purple=>"#800080",
    :red=>"#ff0000",
    :rosybrown=>"#bc8f8f",
    :royalblue=>"#4169e1",
    :saddlebrown=>"#8b4513",
    :salmon=>"#fa8072",
    :sandybrown=>"#f4a460",
    :seagreen=>"#2e8b57",
    :seashell=>"#fff5ee",
    :sienna=>"#a0522d",
    :silver=>"#c0c0c0",
    :skyblue=>"#87ceeb",
    :slateblue=>"#6a5acd",
    :slategray=>"#708090",
    :slategrey=>"#708090",
    :snow=>"#fffafa",
    :springgreen=>"#00ff7f",
    :steelblue=>"#4682b4",
    :tan=>"#d2b48c",
    :teal=>"#008080",
    :thistle=>"#d8bfd8",
    :tomato=>"#ff6347",
    :turquoise=>"#40e0d0",
    :violet=>"#ee82ee",
    :wheat=>"#f5deb3",
    :white=>"#ffffff",
    :whitesmoke=>"#f5f5f5",
    :yellow=>"#ffff00",
    :yellowgreen=>"#9acd32",
  }
end

.transparent ⇒ Object 



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# File 'lib/rubyvis/color/color.rb', line 275

def self.transparent
  Rubyvis.rgb(0,0,0,0)
end

Instance Method Details

#brighter(k) ⇒ Object

Returns a new color that is a brighter version of this color. The behavior of this method may vary slightly depending on the underlying color space. Although brighter and darker are inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.

  • @param [k] number an optional scale factor; defaults to 1.



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# File 'lib/rubyvis/color/color.rb', line 108

def brighter(k)
  self.rgb.lighter(k)
end

#darker(k) ⇒ Object

Returns a new color that is a brighter version of this color. The behavior of this method may vary slightly depending on the underlying color space. Although brighter and darker are inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.

  • @param [k] number an optional scale factor; defaults to 1.



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# File 'lib/rubyvis/color/color.rb', line 119

def darker(k)
  self.rgb.darker(k)
end