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require 'yaml'
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module Chart
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class Theme
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class ThemeNotFound < RuntimeError; end
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@@theme_files = ["#{File.dirname(__FILE__)}/../themes.yml"]
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attr_accessor :colors
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attr_accessor :bar_colors
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attr_accessor :background
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attr_accessor :chart_background
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def self.load(theme_name)
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theme = new(theme_name)
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end
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def self.theme_files
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@@theme_files
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end
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# Allows you to specify paths for custom theme files in YAML format
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def self.add_theme_file(file)
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@@theme_files << file
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end
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def initialize(theme_name)
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themes = {}
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@@theme_files.each {|f| themes.update YAML::load(File.open(f))}
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theme = themes[theme_name]
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if theme
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self.colors = theme[:colors]
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self.bar_colors = theme[:bar_colors]
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self.background = theme[:background]
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self.chart_background = theme[:chart_background]
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self
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else
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raise(ThemeNotFound, "Could not locate the #{theme_name} theme ...")
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end
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end
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def to_options
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{:background => background, :chart_background => chart_background, :bar_colors => bar_colors.join(',')}
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end
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end
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end
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