(function() {
  var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

  if (ELA.Views == null) {
    ELA.Views = {};
  }

  ELA.Views.ChartJS = (function(superClass) {
    extend(ChartJS, superClass);

    function ChartJS() {
      this.render = bind(this.render, this);
      return ChartJS.__super__.constructor.apply(this, arguments);
    }

    ChartJS.Params = (function(superClass1) {
      extend(Params, superClass1);

      function Params() {
        return Params.__super__.constructor.apply(this, arguments);
      }

      return Params;

    })(Backbone.Model);

    ChartJS.prototype.tagName = 'canvas';

    ChartJS.prototype.initialize = function(options) {
      var ref;
      if (options == null) {
        options = {};
      }
      this.chartConfig = $.extend(true, {}, options.config);
      if (((ref = this.chartConfig.options) != null ? ref.title : void 0) != null) {
        $.extend(this.chartConfig.options.title, {
          fontFamily: 'Roboto',
          fontStyle: '500'
        });
      }
      $.extend(this.chartConfig.options, {
        maintainAspectRatio: false
      });
      this.dataFunction = options.dataFunction;
      this.params = options.params;
      return this.listenTo(this.model.get('calculators')[0], "change:" + this.dataFunction, this.render);
    };

    ChartJS.prototype.render = function() {
      var options;
      if (this.chart) {
        this.chart.data = this.model.get('calculators')[0][this.dataFunction]();
        this.chart.update({
          duration: 0
        });
      } else {
        options = $.extend(true, {}, this.chartConfig);
        options.data = this.model.get('calculators')[0][this.dataFunction]();
        this.chart = new Chart(this.el.getContext('2d'), options);
      }
      return this;
    };

    return ChartJS;

  })(Backbone.Poised.View);

}).call(this);