text: 
  nv.models.historicalBarChart = function() {
    "use strict";
    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------
  
    var bars = nv.models.historicalBar()
      , xAxis = nv.models.axis()
      , yAxis = nv.models.axis()
      , legend = nv.models.legend()
      ;
  
  
    var margin = {top: 30, right: 90, bottom: 50, left: 90}
      , color = nv.utils.defaultColor()
      , width = null
      , height = null
      , showLegend = false
      , showXAxis = true
      , showYAxis = true
      , rightAlignYAxis = false
      , tooltips = true
      , tooltip = function(key, x, y, e, graph) {
          return '<h3>' + key + '</h3>' +
                 '<p>' +  y + ' at ' + x + '</p>'
        }
      , x
      , y
      , state = {}
      , defaultState = null
      , noData = 'No Data Available.'
      , dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'stateChange', 'changeState')
      , transitionDuration = 250
      ;
  
    xAxis
      .orient('bottom')
      .tickPadding(7)
      ;
    yAxis
      .orient( (rightAlignYAxis) ? 'right' : 'left')
      ;
  
    //============================================================
  
  
    //============================================================
    // Private Variables
    //------------------------------------------------------------
  
    var showTooltip = function(e, offsetElement) {
  
      // New addition to calculate position if SVG is scaled with viewBox, may move TODO: consider implementing everywhere else
      if (offsetElement) {
        var svg = d3.select(offsetElement).select('svg');
        var viewBox = (svg.node()) ? svg.attr('viewBox') : null;
        if (viewBox) {
          viewBox = viewBox.split(' ');
          var ratio = parseInt(svg.style('width')) / viewBox[2];
          e.pos[0] = e.pos[0] * ratio;
          e.pos[1] = e.pos[1] * ratio;
        }
      }
  
      var left = e.pos[0] + ( offsetElement.offsetLeft || 0 ),
          top = e.pos[1] + ( offsetElement.offsetTop || 0),
          x = xAxis.tickFormat()(bars.x()(e.point, e.pointIndex)),
          y = yAxis.tickFormat()(bars.y()(e.point, e.pointIndex)),
          content = tooltip(e.series.key, x, y, e, chart);
  
      nv.tooltip.show([left, top], content, null, null, offsetElement);
    };
  
    //============================================================
  
  
    function chart(selection) {
      selection.each(function(data) {
        d3.select(this).classed(nv.SVG_NODE_CLASSNAME, true);
        var container = d3.select(this),
            that = this;
  
        var availableWidth = (width  || parseInt(container.style('width')) || 960)
                               - margin.left - margin.right,
            availableHeight = (height || parseInt(container.style('height')) || 400)
                               - margin.top - margin.bottom;
  
  
        chart.update = function() { container.transition().duration(transitionDuration).call(chart) };
        chart.container = this;
  
        //set state.disabled
        state.disabled = data.map(function(d) { return !!d.disabled });
  
        if (!defaultState) {
          var key;
          defaultState = {};
          for (key in state) {
            if (state[key] instanceof Array)
              defaultState[key] = state[key].slice(0);
            else
              defaultState[key] = state[key];
          }
        }
  
        //------------------------------------------------------------
        // Display noData message if there's nothing to show.
  
        if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
          var noDataText = container.selectAll('.nv-noData').data([noData]);
  
          noDataText.enter().append('text')
            .attr('class', 'nvd3 nv-noData')
            .attr('dy', '-.7em')
            .style('text-anchor', 'middle');
  
          noDataText
            .attr('x', margin.left + availableWidth / 2)
            .attr('y', margin.top + availableHeight / 2)
            .text(function(d) { return d });
  
          return chart;
        } else {
          container.selectAll('.nv-noData').remove();
        }
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup Scales
  
        x = bars.xScale();
        y = bars.yScale();
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup containers and skeleton of chart
  
        var wrap = container.selectAll('g.nv-wrap.nv-historicalBarChart').data([data]);
        var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-historicalBarChart').append('g');
        var g = wrap.select('g');
  
        gEnter.append('g').attr('class', 'nv-x nv-axis');
        gEnter.append('g').attr('class', 'nv-y nv-axis');
        gEnter.append('g').attr('class', 'nv-barsWrap');
        gEnter.append('g').attr('class', 'nv-legendWrap');
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Legend
  
        if (showLegend) {
          legend.width(availableWidth);
  
          g.select('.nv-legendWrap')
              .datum(data)
              .call(legend);
  
          if ( margin.top != legend.height()) {
            margin.top = legend.height();
            availableHeight = (height || parseInt(container.style('height')) || 400)
                               - margin.top - margin.bottom;
          }
  
          wrap.select('.nv-legendWrap')
              .attr('transform', 'translate(0,' + (-margin.top) +')')
        }
  
        //------------------------------------------------------------
  
        wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
  
        if (rightAlignYAxis) {
          g.select(".nv-y.nv-axis")
              .attr("transform", "translate(" + availableWidth + ",0)");
        }
  
  
        //------------------------------------------------------------
        // Main Chart Component(s)
  
        bars
          .width(availableWidth)
          .height(availableHeight)
          .color(data.map(function(d,i) {
            return d.color || color(d, i);
          }).filter(function(d,i) { return !data[i].disabled }));
  
  
        var barsWrap = g.select('.nv-barsWrap')
            .datum(data.filter(function(d) { return !d.disabled }))
  
        barsWrap.transition().call(bars);
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup Axes
  
        if (showXAxis) {
          xAxis
            .scale(x)
            .tickSize(-availableHeight, 0);
  
          g.select('.nv-x.nv-axis')
              .attr('transform', 'translate(0,' + y.range()[0] + ')');
          g.select('.nv-x.nv-axis')
              .transition()
              .call(xAxis);
        }
  
        if (showYAxis) {
          yAxis
            .scale(y)
            .ticks( availableHeight / 36 )
            .tickSize( -availableWidth, 0);
  
          g.select('.nv-y.nv-axis')
            .transition()
              .call(yAxis);
        }
        //------------------------------------------------------------
  
  
        //============================================================
        // Event Handling/Dispatching (in chart's scope)
        //------------------------------------------------------------
  
        legend.dispatch.on('legendClick', function(d,i) {
          d.disabled = !d.disabled;
  
          if (!data.filter(function(d) { return !d.disabled }).length) {
            data.map(function(d) {
              d.disabled = false;
              wrap.selectAll('.nv-series').classed('disabled', false);
              return d;
            });
          }
  
          state.disabled = data.map(function(d) { return !!d.disabled });
          dispatch.stateChange(state);
  
          selection.transition().call(chart);
        });
  
        legend.dispatch.on('legendDblclick', function(d) {
            //Double clicking should always enable current series, and disabled all others.
            data.forEach(function(d) {
               d.disabled = true;
            });
            d.disabled = false;
  
            state.disabled = data.map(function(d) { return !!d.disabled });
            dispatch.stateChange(state);
            chart.update();
        });
  
        dispatch.on('tooltipShow', function(e) {
          if (tooltips) showTooltip(e, that.parentNode);
        });
  
  
        dispatch.on('changeState', function(e) {
  
          if (typeof e.disabled !== 'undefined') {
            data.forEach(function(series,i) {
              series.disabled = e.disabled[i];
            });
  
            state.disabled = e.disabled;
          }
  
          chart.update();
        });
  
        //============================================================
  
      });
  
      return chart;
    }
  
  
    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------
  
    bars.dispatch.on('elementMouseover.tooltip', function(e) {
      e.pos = [e.pos[0] +  margin.left, e.pos[1] + margin.top];
      dispatch.tooltipShow(e);
    });
  
    bars.dispatch.on('elementMouseout.tooltip', function(e) {
      dispatch.tooltipHide(e);
    });
  
    dispatch.on('tooltipHide', function() {
      if (tooltips) nv.tooltip.cleanup();
    });
  
    //============================================================
  
  
    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------
  
    // expose chart's sub-components
    chart.dispatch = dispatch;
    chart.bars = bars;
    chart.legend = legend;
    chart.xAxis = xAxis;
    chart.yAxis = yAxis;
  
    d3.rebind(chart, bars, 'defined', 'isArea', 'x', 'y', 'size', 'xScale', 'yScale',
      'xDomain', 'yDomain', 'xRange', 'yRange', 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'id', 'interpolate','highlightPoint','clearHighlights', 'interactive');
  
    chart.options = nv.utils.optionsFunc.bind(chart);
  
    chart.margin = function(_) {
      if (!arguments.length) return margin;
      margin.top    = typeof _.top    != 'undefined' ? _.top    : margin.top;
      margin.right  = typeof _.right  != 'undefined' ? _.right  : margin.right;
      margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
      margin.left   = typeof _.left   != 'undefined' ? _.left   : margin.left;
      return chart;
    };
  
    chart.width = function(_) {
      if (!arguments.length) return width;
      width = _;
      return chart;
    };
  
    chart.height = function(_) {
      if (!arguments.length) return height;
      height = _;
      return chart;
    };
  
    chart.color = function(_) {
      if (!arguments.length) return color;
      color = nv.utils.getColor(_);
      legend.color(color);
      return chart;
    };
  
    chart.showLegend = function(_) {
      if (!arguments.length) return showLegend;
      showLegend = _;
      return chart;
    };
  
    chart.showXAxis = function(_) {
      if (!arguments.length) return showXAxis;
      showXAxis = _;
      return chart;
    };
  
    chart.showYAxis = function(_) {
      if (!arguments.length) return showYAxis;
      showYAxis = _;
      return chart;
    };
  
    chart.rightAlignYAxis = function(_) {
      if(!arguments.length) return rightAlignYAxis;
      rightAlignYAxis = _;
      yAxis.orient( (_) ? 'right' : 'left');
      return chart;
    };
  
    chart.tooltips = function(_) {
      if (!arguments.length) return tooltips;
      tooltips = _;
      return chart;
    };
  
    chart.tooltipContent = function(_) {
      if (!arguments.length) return tooltip;
      tooltip = _;
      return chart;
    };
  
    chart.state = function(_) {
      if (!arguments.length) return state;
      state = _;
      return chart;
    };
  
    chart.defaultState = function(_) {
      if (!arguments.length) return defaultState;
      defaultState = _;
      return chart;
    };
  
    chart.noData = function(_) {
      if (!arguments.length) return noData;
      noData = _;
      return chart;
    };
  
    chart.transitionDuration = function(_) {
      if (!arguments.length) return transitionDuration;
      transitionDuration = _;
      return chart;
    };
  
    //============================================================
  
  
    return chart;
  }
  