Toddy.Iced.Color (Toddy v0.3.0)

Color type for iced widget properties.

All colors are canonical hex strings: "#rrggbb" or "#rrggbbaa".

Use the constructors from_rgb/3, from_rgba/4, and from_hex/1 to build colors. Use cast/1 to normalize any supported input form (named atoms or hex strings) into a canonical hex string.

All 148 CSS Color Module Level 4 named colors are supported, plus :transparent.

Examples

iex> Toddy.Iced.Color.from_rgb(255, 128, 0)
"#ff8000"

iex> Toddy.Iced.Color.from_hex("ff8800")
"#ff8800"

iex> Toddy.Iced.Color.cast(:red)
"#ff0000"

iex> Toddy.Iced.Color.cast(:cornflowerblue)
"#6495ed"

Summary

Types

input()

Any value accepted by cast/1: hex string, short hex, or named color atom.

named()

Named CSS color atom (148 CSS Color Module Level 4 colors plus :transparent).

t()

Canonical hex color string ("#rrggbb" or "#rrggbbaa").

Functions

black()

Returns black as a hex string.

cast(name)

Normalizes any supported color input to a canonical hex string.

encode(color)

Encodes a color for the wire format. Identity since all colors are hex strings.

from_hex(hex)

Normalizes a hex string (with or without leading #) to canonical form.

from_rgb(r, g, b)

Creates a hex color string from 0-255 RGB integer values.

from_rgba(r, g, b, a)

Creates a hex color string with alpha from 0-255 RGB integers and a 0.0-1.0 alpha float.

named_colors()

Returns the map of all supported named colors.

transparent()

Returns fully transparent black as a hex string.

white()

Returns white as a hex string.

Types

input()

@type input() :: named() | String.t()

Any value accepted by cast/1: hex string, short hex, or named color atom.

named()

@type named() ::
  :transparent
  | :beige
  | :hotpink
  | :lawngreen
  | :turquoise
  | :firebrick
  | :blueviolet
  | :lightslategrey
  | :seagreen
  | :silver
  | :lightsalmon
  | :powderblue
  | :darkslateblue
  | :darkgreen
  | :cornflowerblue
  | :khaki
  | :mediumturquoise
  | :coral
  | :goldenrod
  | :orange
  | :indianred
  | :springgreen
  | :yellowgreen
  | :darkslategray
  | :papayawhip
  | :black
  | :orchid
  | :lightseagreen
  | :darkmagenta
  | :orangered
  | :crimson
  | :steelblue
  | :ghostwhite
  | :peachpuff
  | :white
  | :forestgreen
  | :sienna
  | :navajowhite
  | :blue
  | :tomato
  | :darkolivegreen
  | :darkcyan
  | :burlywood
  | :darkgoldenrod
  | :ivory
  | :lightyellow
  | :darkkhaki
  | :greenyellow
  | :wheat
  | :plum
  | :lavender
  | :lightgrey
  | :chocolate
  | :salmon
  | :darkturquoise
  | :dodgerblue
  | :lightskyblue
  | :cadetblue
  | :aqua
  | :lavenderblush
  | :linen
  | :lightgray
  | :pink
  | :magenta
  | :sandybrown
  | :darksalmon
  | :yellow
  | :mediumpurple
  | :floralwhite
  | :lightslategray
  | :dimgrey
  | :slategray
  | :mintcream
  | :lime
  | :midnightblue
  | :palegreen
  | :maroon
  | :lightcyan
  | :lightcoral
  | :azure
  | :mediumslateblue
  | :antiquewhite
  | :lightblue
  | :mediumorchid
  | :slategrey
  | :lightpink
  | :gainsboro
  | :grey
  | :honeydew
  | :royalblue
  | :mediumblue
  | :red
  | :mediumaquamarine
  | :gold
  | :indigo
  | :darkred
  | :lightsteelblue
  | :brown
  | :darkslategrey
  | :lightgoldenrodyellow
  | :thistle
  | :aliceblue
  | :whitesmoke
  | :chartreuse
  | :snow
  | :olivedrab
  | :rebeccapurple
  | :navy
  | :green
  | :darkgrey
  | :deepskyblue
  | :paleturquoise
  | :palevioletred
  | :gray
  | :darkviolet
  | :darkorchid
  | :teal
  | :tan
  | :darkseagreen
  | :mediumvioletred
  | :fuchsia
  | :lemonchiffon
  | :olive
  | :slateblue
  | :mediumseagreen
  | :darkorange
  | :purple
  | :cornsilk
  | :rosybrown
  | :limegreen
  | :mistyrose
  | :cyan
  | :palegoldenrod
  | :aquamarine
  | :bisque
  | :mediumspringgreen
  | :peru
  | :seashell
  | :saddlebrown
  | :moccasin
  | :dimgray
  | :blanchedalmond
  | :skyblue
  | :lightgreen
  | :violet
  | :deeppink
  | :darkblue
  | :oldlace
  | :darkgray

Named CSS color atom (148 CSS Color Module Level 4 colors plus :transparent).

t()

@type t() :: String.t()

Canonical hex color string ("#rrggbb" or "#rrggbbaa").

Functions

black()

@spec black() :: t()

Returns black as a hex string.

cast(name)

@spec cast(color :: input()) :: t()

Normalizes any supported color input to a canonical hex string.

Accepts:

Named atoms: all 148 CSS Color Module Level 4 named colors (e.g. :red, :cornflowerblue, :rebeccapurple) plus :transparent
Hex strings: "#rrggbb", "#rrggbbaa", "#rgb", "#rgba" (normalized to canonical 6/8-char lowercase hex)

Raises ArgumentError for unsupported atoms.

Examples

iex> Toddy.Iced.Color.cast(:black)
"#000000"

iex> Toddy.Iced.Color.cast(:transparent)
"#00000000"

iex> Toddy.Iced.Color.cast("#FF0000")
"#ff0000"

iex> Toddy.Iced.Color.cast(:cornflowerblue)
"#6495ed"

encode(color)

@spec encode(color :: t()) :: t()

Encodes a color for the wire format. Identity since all colors are hex strings.

Examples

iex> Toddy.Iced.Color.encode("#ff0000")
"#ff0000"

from_hex(hex)

@spec from_hex(hex :: String.t()) :: t()

Normalizes a hex string (with or without leading #) to canonical form.

Downcases the hex digits for consistency.

Examples

iex> Toddy.Iced.Color.from_hex("#FF8800")
"#ff8800"

iex> Toddy.Iced.Color.from_hex("ff8800")
"#ff8800"

iex> Toddy.Iced.Color.from_hex("#ff880080")
"#ff880080"

from_rgb(r, g, b)

@spec from_rgb(r :: integer(), g :: integer(), b :: integer()) :: t()

Creates a hex color string from 0-255 RGB integer values.

Examples

iex> Toddy.Iced.Color.from_rgb(0, 0, 0)
"#000000"

iex> Toddy.Iced.Color.from_rgb(255, 255, 255)
"#ffffff"

iex> Toddy.Iced.Color.from_rgb(255, 128, 0)
"#ff8000"

from_rgba(r, g, b, a)

@spec from_rgba(r :: integer(), g :: integer(), b :: integer(), a :: float()) :: t()

Creates a hex color string with alpha from 0-255 RGB integers and a 0.0-1.0 alpha float.

Examples

iex> Toddy.Iced.Color.from_rgba(255, 0, 0, 1.0)
"#ff0000ff"

iex> Toddy.Iced.Color.from_rgba(0, 0, 0, 0.0)
"#00000000"

iex> Toddy.Iced.Color.from_rgba(255, 128, 0, 0.5)
"#ff800080"

named_colors()

@spec named_colors() :: %{required(atom()) => t()}

Returns the map of all supported named colors.

Keys are atoms, values are canonical hex strings.

transparent()

@spec transparent() :: t()

Returns fully transparent black as a hex string.

white()

@spec white() :: t()

Returns white as a hex string.