text: 
  nv.models.cumulativeLineChart = function() {
  
    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------
  
    var lines = nv.models.line()
      , xAxis = nv.models.axis()
      , yAxis = nv.models.axis()
      , legend = nv.models.legend()
      , controls = nv.models.legend()
      ;
  
    var margin = {top: 30, right: 30, bottom: 50, left: 60}
      , color = nv.utils.defaultColor()
      , width = null
      , height = null
      , showLegend = true
      , tooltips = true
      , showControls = true
      , rescaleY = true
      , tooltip = function(key, x, y, e, graph) {
          return '<h3>' + key + '</h3>' +
                 '<p>' +  y + ' at ' + x + '</p>'
        }
      , x //can be accessed via chart.xScale()
      , y //can be accessed via chart.yScale()
      , id = lines.id()
      , state = { index: 0, rescaleY: rescaleY }
      , noData = 'No Data Available.'
      , dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'stateChange', 'changeState')
      ;
  
    xAxis
      .orient('bottom')
      .tickPadding(7)
      ;
    yAxis
      .orient('left')
      ;
  
    //============================================================
  
  
    //============================================================
    // Private Variables
    //------------------------------------------------------------
  
     var dx = d3.scale.linear()
       , index = {i: 0, x: 0}
       ;
  
    var showTooltip = function(e, offsetElement) {
      var left = e.pos[0] + ( offsetElement.offsetLeft || 0 ),
          top = e.pos[1] + ( offsetElement.offsetTop || 0),
          x = xAxis.tickFormat()(lines.x()(e.point, e.pointIndex)),
          y = yAxis.tickFormat()(lines.y()(e.point, e.pointIndex)),
          content = tooltip(e.series.key, x, y, e, chart);
  
      nv.tooltip.show([left, top], content, null, null, offsetElement);
    };
  
  /*
    //Moved to see if we can get better behavior to fix issue #315
    var indexDrag = d3.behavior.drag()
                      .on('dragstart', dragStart)
                      .on('drag', dragMove)
                      .on('dragend', dragEnd);
  
    function dragStart(d,i) {
      d3.select(chart.container)
          .style('cursor', 'ew-resize');
    }
  
    function dragMove(d,i) {
      d.x += d3.event.dx;
      d.i = Math.round(dx.invert(d.x));
  
      d3.select(this).attr('transform', 'translate(' + dx(d.i) + ',0)');
      chart.update();
    }
  
    function dragEnd(d,i) {
      d3.select(chart.container)
          .style('cursor', 'auto');
      chart.update();
    }
  */
  
    //============================================================
  
  
    function chart(selection) {
      selection.each(function(data) {
        var container = d3.select(this).classed('nv-chart-' + id, true),
            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() { chart(selection) };
        chart.container = this;
  
        //set state.disabled
        state.disabled = data.map(function(d) { return !!d.disabled });
  
        var indexDrag = d3.behavior.drag()
                          .on('dragstart', dragStart)
                          .on('drag', dragMove)
                          .on('dragend', dragEnd);
  
  
        function dragStart(d,i) {
          d3.select(chart.container)
              .style('cursor', 'ew-resize');
        }
  
        function dragMove(d,i) {
          index.x = d3.event.x;
          index.i = Math.round(dx.invert(index.x));
          updateZero();
        }
  
        function dragEnd(d,i) {
          d3.select(chart.container)
              .style('cursor', 'auto');
  
          // update state and send stateChange with new index
          state.index = index.i;
          dispatch.stateChange(state);
        }
  
  
  
  
        //------------------------------------------------------------
        // Display No Data 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 = lines.xScale();
        y = lines.yScale();
  
  
        if (!rescaleY) {
          var seriesDomains = data
            .filter(function(series) { return !series.disabled })
            .map(function(series,i) {
              var initialDomain = d3.extent(series.values, lines.y());
  
              //account for series being disabled when losing 95% or more
              if (initialDomain[0] < -.95) initialDomain[0] = -.95;
  
              return [
                (initialDomain[0] - initialDomain[1]) / (1 + initialDomain[1]),
                (initialDomain[1] - initialDomain[0]) / (1 + initialDomain[0])
              ];
            });
  
          var completeDomain = [
            d3.min(seriesDomains, function(d) { return d[0] }),
            d3.max(seriesDomains, function(d) { return d[1] })
          ]
  
          lines.yDomain(completeDomain);
        } else {
          lines.yDomain(null);
        }
  
  
        dx  .domain([0, data[0].values.length - 1]) //Assumes all series have same length
            .range([0, availableWidth])
            .clamp(true);
  
        //------------------------------------------------------------
  
  
        var data = indexify(index.i, data);
  
  
        //------------------------------------------------------------
        // Setup containers and skeleton of chart
  
        var wrap = container.selectAll('g.nv-wrap.nv-cumulativeLine').data([data]);
        var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-cumulativeLine').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-background');
        gEnter.append('g').attr('class', 'nv-linesWrap');
        gEnter.append('g').attr('class', 'nv-legendWrap');
        gEnter.append('g').attr('class', 'nv-controlsWrap');
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // 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;
          }
  
          g.select('.nv-legendWrap')
              .attr('transform', 'translate(0,' + (-margin.top) +')')
        }
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Controls
  
        if (showControls) {
          var controlsData = [
            { key: 'Re-scale y-axis', disabled: !rescaleY }
          ];
  
          controls.width(140).color(['#444', '#444', '#444']);
          g.select('.nv-controlsWrap')
              .datum(controlsData)
              .attr('transform', 'translate(0,' + (-margin.top) +')')
              .call(controls);
        }
  
        //------------------------------------------------------------
  
  
        wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
  
  
        // Show error if series goes below 100%
        var tempDisabled = data.filter(function(d) { return d.tempDisabled });
  
        wrap.select('.tempDisabled').remove(); //clean-up and prevent duplicates
        if (tempDisabled.length) {
          wrap.append('text').attr('class', 'tempDisabled')
              .attr('x', availableWidth / 2)
              .attr('y', '-.71em')
              .style('text-anchor', 'end')
              .text(tempDisabled.map(function(d) { return d.key }).join(', ') + ' values cannot be calculated for this time period.');
        }
  
  
  
        //------------------------------------------------------------
        // Main Chart Component(s)
  
        gEnter.select('.nv-background')
          .append('rect');
  
        g.select('.nv-background rect')
            .attr('width', availableWidth)
            .attr('height', availableHeight);
  
        lines
          //.x(function(d) { return d.x })
          .y(function(d) { return d.display.y })
          .width(availableWidth)
          .height(availableHeight)
          .color(data.map(function(d,i) {
            return d.color || color(d, i);
          }).filter(function(d,i) { return !data[i].disabled && !data[i].tempDisabled }));
  
  
  
        var linesWrap = g.select('.nv-linesWrap')
            .datum(data.filter(function(d) { return !d.disabled && !d.tempDisabled }));
  
        //d3.transition(linesWrap).call(lines);
        linesWrap.call(lines);
  
  
        var indexLine = linesWrap.selectAll('.nv-indexLine')
            .data([index]);
        indexLine.enter().append('rect').attr('class', 'nv-indexLine')
            .attr('width', 3)
            .attr('x', -2)
            .attr('fill', 'red')
            .attr('fill-opacity', .5)
            .call(indexDrag)
  
        indexLine
            .attr('transform', function(d) { return 'translate(' + dx(d.i) + ',0)' })
            .attr('height', availableHeight)
  
        //------------------------------------------------------------
  
  
        //------------------------------------------------------------
        // Setup Axes
  
        xAxis
          .scale(x)
          //Suggest how many ticks based on the chart width and D3 should listen (70 is the optimal number for MM/DD/YY dates)
          .ticks( Math.min(data[0].values.length,availableWidth/70) )
          .tickSize(-availableHeight, 0);
  
        g.select('.nv-x.nv-axis')
            .attr('transform', 'translate(0,' + y.range()[0] + ')');
        d3.transition(g.select('.nv-x.nv-axis'))
            .call(xAxis);
  
  
        yAxis
          .scale(y)
          .ticks( availableHeight / 36 )
          .tickSize( -availableWidth, 0);
  
        d3.transition(g.select('.nv-y.nv-axis'))
            .call(yAxis);
  
        //------------------------------------------------------------
  
  
        //============================================================
        // Event Handling/Dispatching (in chart's scope)
        //------------------------------------------------------------
  
  
        function updateZero() {
          indexLine
            .data([index]);
  
          chart.update();
        }
  
        g.select('.nv-background rect')
            .on('click', function() {
              index.x = d3.mouse(this)[0];
              index.i = Math.round(dx.invert(index.x));
  
              // update state and send stateChange with new index
              state.index = index.i;
              dispatch.stateChange(state);
  
              updateZero();
            });
  
        lines.dispatch.on('elementClick', function(e) {
          index.i = e.pointIndex;
          index.x = dx(index.i);
  
          // update state and send stateChange with new index
          state.index = index.i;
          dispatch.stateChange(state);
  
          updateZero();
        });
  
        controls.dispatch.on('legendClick', function(d,i) { 
          d.disabled = !d.disabled;
          rescaleY = !d.disabled;
  
          state.rescaleY = rescaleY;
          dispatch.stateChange(state);
  
          //selection.transition().call(chart);
          selection.call(chart);
        });
  
  
        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);
          selection.call(chart);
        });
  
  /*
        //
        legend.dispatch.on('legendMouseover', function(d, i) {
          d.hover = true;
          selection.transition().call(chart)
        });
  
        legend.dispatch.on('legendMouseout', function(d, i) {
          d.hover = false;
          selection.transition().call(chart)
        });
  */
  
        dispatch.on('tooltipShow', function(e) {
          if (tooltips) showTooltip(e, that.parentNode);
        });
  
  
        // Update chart from a state object passed to event handler
        dispatch.on('changeState', function(e) {
  
          if (typeof e.disabled !== 'undefined') {
            data.forEach(function(series,i) {
              series.disabled = e.disabled[i];
            });
  
            state.disabled = e.disabled;
          }
  
  
          if (typeof e.index !== 'undefined') {
            index.i = e.index;
            index.x = dx(index.i);
  
            state.index = e.index;
  
            indexLine
              .data([index]);
          }
  
  
          if (typeof e.rescaleY !== 'undefined') {
            rescaleY = e.rescaleY;
          }
  
          selection.call(chart);
        });
  
        //============================================================
  
      });
  
      return chart;
    }
  
  
    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------
  
    lines.dispatch.on('elementMouseover.tooltip', function(e) {
      e.pos = [e.pos[0] +  margin.left, e.pos[1] + margin.top];
      dispatch.tooltipShow(e);
    });
  
    lines.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.lines = lines;
    chart.legend = legend;
    chart.xAxis = xAxis;
    chart.yAxis = yAxis;
  
    d3.rebind(chart, lines, 'defined', 'isArea', 'x', 'y', 'size', 'xDomain', 'yDomain', 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'id');
  
    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.rescaleY = function(_) {
      if (!arguments.length) return rescaleY;
      rescaleY = _
      return rescaleY;
    };
  
    chart.showControls = function(_) {
      if (!arguments.length) return showControls;
      showControls = _;
      return chart;
    };
  
    chart.showLegend = function(_) {
      if (!arguments.length) return showLegend;
      showLegend = _;
      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.noData = function(_) {
      if (!arguments.length) return noData;
      noData = _;
      return chart;
    };
  
    //============================================================
  
  
    //============================================================
    // Functions
    //------------------------------------------------------------
  
    /* Normalize the data according to an index point. */
    function indexify(idx, data) {
      return data.map(function(line, i) {
        var v = lines.y()(line.values[idx], idx);
  
        //TODO: implement check below, and disable series if series loses 100% or more cause divide by 0 issue
        if (v < -.95) {
          //if a series loses more than 100%, calculations fail.. anything close can cause major distortion (but is mathematically correct till it hits 100)
          line.tempDisabled = true;
          return line;
        }
  
        line.tempDisabled = false;
  
        line.values = line.values.map(function(point, pointIndex) {
          point.display = {'y': (lines.y()(point, pointIndex) - v) / (1 + v) };
          return point;
        })
  
        return line;
      })
    }
  
    //============================================================
  
  
    return chart;
  }
  