class ChartJS::Chart
Public Class Methods
new(&block)
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# File lib/chart_js/chart/chart.rb, line 12 def initialize(&block) @type = nil @data = nil @opts = nil @file = false @stream = false @chart_obj = 'chart' + SecureRandom.uuid.gsub("-","") build(&block) if block_given? end
Public Instance Methods
build(&block)
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# File lib/chart_js/chart/chart.rb, line 22 def build(&block) instance_eval(&block) if @file f = SaveFile.new(@file, html: to_html) f.save! end self end
cdn(version: "2.9.3", min: true)
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# File lib/chart_js/chart/chart.rb, line 69 def cdn(version: "2.9.3", min: true) if min "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/Chart.js/#{version}/Chart.min.js\"></script>" else "<script src=\"https://cdnjs.cloudflare.com/ajax/libs/Chart.js/#{version}/Chart.js\"></script>" end end
chart_obj(value = nil)
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# File lib/chart_js/chart/chart.rb, line 81 def chart_obj(value = nil) return @chart_obj if value.nil? @chart_obj = value end
data(&block)
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# File lib/chart_js/chart/chart.rb, line 59 def data(&block) return @data unless block_given? @data = Data.new.build(&block) end
event_stream(path, chart: chart_obj, &block)
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# File lib/chart_js/chart/chart.rb, line 92 def event_stream(path, chart: chart_obj, &block) @stream = EventStream.new(path, chart) @stream.build(&block) if block_given? end
file(path, &block)
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# File lib/chart_js/chart/chart.rb, line 120 def file(path, &block) @file = path @file_block = block end
opts(&block)
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# File lib/chart_js/chart/chart.rb, line 64 def opts(&block) return @opts unless block_given? @opts = Opts.new.build(&block) end
random_color()
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# File lib/chart_js/chart/chart.rb, line 77 def random_color "##{SecureRandom.hex(3)}" end
random_id(force: false)
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# File lib/chart_js/chart/chart.rb, line 86 def random_id(force: false) return @id unless @id.nil? or force @id = SecureRandom.uuid end
script(config: to_json, id: random_id, chart: chart_obj)
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# File lib/chart_js/chart/chart.rb, line 97 def script(config: to_json, id: random_id, chart: chart_obj) "<script> var config = #{config} var ctx = document.getElementById(\"#{id}\").getContext(\"2d\"); var #{chart} = new Chart(ctx, config); </script>" end
to_h()
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# File lib/chart_js/chart/chart.rb, line 31 def to_h case type when 'pie' { type: @type, data: @data.to_h(:pie), options: @opts.to_h } when 'doughnut' { type: @type, data: @data.to_h(:pie), options: @opts.to_h } when 'line' data = @data.to_h(false) data['datasets'].each do |set| set['fill'] = false unless set['fill'] end #data['fill'] = false unless data['fill'] { type: @type, data: data, options: @opts.to_h } else { type: @type, data: @data.to_h(false), options: @opts.to_h } end end
to_html(width: "60%", heigth: width, head: true, cdn: head, version: "2.6.0", body: true, id: random_id, script: true, chart: chart_obj, stream: true)
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# File lib/chart_js/chart/chart.rb, line 105 def to_html(width: "60%", heigth: width, head: true, cdn: head, version: "2.6.0", body: true, id: random_id, script: true, chart: chart_obj, stream: true) str = [] if cdn str << "<head>#{cdn(version: version)}</head>" end str << "<body>" if body str << "<div id=\"canvas-holder\" style=\"width:#{width} heigth:#{heigth}\">" str << "<canvas id=\"#{id}\"/>" str << "</div>" str << "</body>" if body str << script(id: id, chart: chart) if script str << @stream.to_html if @stream && stream str.join("\n") end
to_json(type = :pretty)
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# File lib/chart_js/chart/chart.rb, line 49 def to_json(type = :pretty) return JSON.pretty_generate(to_h) if type == :pretty to_h.to_json end
type(value = nil)
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# File lib/chart_js/chart/chart.rb, line 54 def type(value = nil) return @type if value.nil? @type = value end