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Contents
# frozen_string_literal: true
module Writexlsx
module Gradient
def gradient_properties(args)
return unless ptrue?(args)
gradient = {}
types = {
'linear' => 'linear',
'radial' => 'circle',
'rectangular' => 'rect',
'path' => 'shape'
}
# Check the colors array exists and is valid.
raise "Gradient must include colors array" unless ptrue?(args[:colors])
# Check the colors array has the right number of entries.
raise "Gradient colors array must include at least 2 values" if args[:colors].size < 2
gradient[:colors] = args[:colors]
if ptrue?(args[:positions])
# Check the positions array has the right number of entries.
raise "Gradient positions not equal to numbers of colors" unless args[:positions].size == args[:colors].size
# Check the positions are in the correct range.
args[:positions].each do |pos|
raise "Gradient position '#{pos} must be in range 0 <= pos <= 100" if pos < 0 || pos > 100
end
gradient[:positions] = args[:positions]
else
# Use the default gradient positions.
case args[:colors].size
when 2
gradient[:positions] = [0, 100]
when 3
gradient[:positions] = [0, 50, 100]
when 4
gradient[:positions] = [0, 33, 66, 100]
else
raise "Must specify gradient positions"
end
end
# Set the gradient angle.
if args[:angle]
angle = args[:angle]
raise "Gradient angle '#{angle} must be in range 0 <= pos < 360" if angle < 0 || angle > 359.9
gradient[:angle] = angle
else
gradient[:angle] = 90
end
# Set the gradient type.
if args[:type]
type = args[:type]
raise "Unknow gradient type '#{type}'" unless types[type]
gradient[:type] = types[type]
else
gradient[:type] = 'linear'
end
gradient
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems