Better D3 Reusable Function

by ramnathv

HTML

<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//rawgit.com/gka/d3-jetpack/master/d3-jetpack.js"></script>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootswatch/3.3.4/yeti/bootstrap.min.css">
<div class="container">
    <div class="row">
        <div class="col-xs-6" id='main'></div>
    </div>
</div>

CSS

.container {
  margin-top: 40px;
}

CoffeeScript

createAccessors = (visExport) ->
  for n of visExport.opts
    continue  unless visExport.opts.hasOwnProperty(n)
    visExport[n] = ((n) ->
      (v) ->
        (if arguments.length then (visExport.opts[n] = v
        this
        ) else visExport.opts[n])
    )(n)
  return

# http://gomakethings.com/vanilla-javascript-version-of-jquery-extend/
extend = (defaults, options) ->
  extended = {}
  prop = undefined
  for prop of defaults
    `prop = prop`
    if Object::hasOwnProperty.call(defaults, prop)
      extended[prop] = defaults[prop]
  for prop of options
    `prop = prop`
    if Object::hasOwnProperty.call(options, prop)
      extended[prop] = options[prop]
  extended
        
d3.ui = d3.ui || {}
d3.ui.panel = () ->
  defaults = {panels: ["heading", "body"], type: "default"}
  opts = extend(arguments[0], defaults)
  exports = (selection) ->
    selection.each (data) ->
      panel = d3.select(@)
        .selectAll("div.panel")
        .data(data)
      panelEnter = panel.enter()
        .append("div.panel.panel-#{opts.type}")
      
      opts.panels.forEach (d) ->
         panelEnter.append("div.panel-#{d}") 
      panel
  exports.opts = opts; createAccessors(exports)
  exports
   
main = d3.select("#main")
panel = d3.ui.panel().panels(['body'])
panelDiv = main
  .datum(d3.range(3))
  .call(panel)
    
panelDiv.selectAll(".panel-body")
  .append('text')
  .text (d) -> d
panelDiv.selectAll(".panel-body").on "click", ->
  console.log d3.select(@).data()