Sha256: 71f78c3e1fae024137dd9d654d9e96f2c8f98b7ab3fe74bcac48ffde35823cdb
Contents?: true
Size: 727 Bytes
Versions: 10
Compression:
Stored size: 727 Bytes
Contents
require 'zlib'
module PulseMeter
module DygraphsVisualize
class SeriesColor
def initialize(options = {})
@forced_color = options[:color]
@name = options[:name] || rand.to_s
end
def color
@color ||= calculate_color
end
private
def calculate_color
@forced_color || calculate_color_by_name
end
def calculate_color_by_name
'#' + hashed_color_bytes.map{|b| '%02x' % darken(b)}.join
end
def hashed_color_bytes
n = Zlib::crc32(@name)
[
n & 0xFF,
(n & 0xFF00) >> 8,
(n & 0xFF0000) >> 16
]
end
def darken(byte)
byte / 2
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems