Module: Node::Echarts

Defined in:
lib/node/echarts.rb,
lib/node/echarts/version.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.chart(path, data, width = 400, height = 400) ⇒ Object

Generate chart picture

Example:

>> chart("/home/foo/sample.png", {titile: {text: 'T1'},
                        xAxis: ['c'],
                        series: [{type: 'bar', data: [100]}]
                        },
         400, 400)

Arguments:
  path: (string)
  data: (hash)
  width: integer
  height: integer



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# File 'lib/node/echarts.rb', line 20

def                        self.chart(path, data, width=400, height=400)
  cmd_str = "var echarts = require('echarts'); var Canvas = require('canvas'); var fs = require('fs'); #{@theme}; echarts.setCanvasCreator(function () { var canvas = new Canvas(128, 128); return canvas; }); var chart = echarts.init(new Canvas(#{width}, #{height}), 'infographic'); chart.setOption(#{data.to_json.gsub("\"", "'")}); fs.writeFileSync('#{path}', chart.getDom().toBuffer()); process.exit()"
  `node -e "#{cmd_str}"`
end

.register_theme(path) ⇒ Object

Register echarts theme by file

Example:

>> Node::Echarts.register_theme("/home/infographic")

Arguments:

path: (string)



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# File 'lib/node/echarts.rb', line 32

def self.register_theme(path)
  @theme = File.read(path).
    gsub(/\/\/.*$/, '').  # remove comment
    gsub("\n", "").       # remove \n
    gsub(/\s+/, " ").     # compact blank
    gsub("\"", "'")       # replace " with '
end