lineWithLegend.js

nv.models.lineWithLegend = function() {
  var margin = {top: 30, right: 20, bottom: 50, left: 60},
      color = d3.scale.category20().range(),
      width, height;

  var lines = nv.models.line(),
      //x = d3.scale.linear(),
      //y = d3.scale.linear(),
      x = lines.xScale(),
      y = lines.yScale(),
      xAxis = nv.models.axis().scale(x).orient('bottom'),
      yAxis = nv.models.axis().scale(y).orient('left'),
      legend = nv.models.legend().height(30),
      dispatch = d3.dispatch('tooltipShow', 'tooltipHide');


  function chart(selection) {
    selection.each(function(data) {

      var availableWidth = (width  || parseInt(d3.select(this).style('width')) || 960)
                             - margin.left - margin.right,
          availableHeight = (height || parseInt(d3.select(this).style('height')) || 400)
                             - margin.top - margin.bottom;


      lines
        .width(availableWidth)
        .height(availableHeight)
        .color(data.map(function(d,i) {
            return d.color || color[i % 10];
          }).filter(function(d,i) { return !data[i].disabled }));


      var wrap = d3.select(this).selectAll('g.wrap.lineWithLegend').data([data]);
      var gEnter = wrap.enter().append('g').attr('class', 'wrap nvd3 lineWithLegend').append('g');

      gEnter.append('g').attr('class', 'x axis');
      gEnter.append('g').attr('class', 'y axis');
      gEnter.append('g').attr('class', 'linesWrap');
      gEnter.append('g').attr('class', 'legendWrap');



      //TODO: margins should be adjusted based on what components are used: axes, axis labels, legend
      margin.top = legend.height();

      var g = wrap.select('g')
          .attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');



      legend.width(availableWidth / 2);

      g.select('.legendWrap')
          .datum(data)
          .attr('transform', 'translate(' + (availableWidth / 2) + ',' + (-margin.top) +')')
          .call(legend);



      var linesWrap = g.select('.linesWrap')
          .datum(data.filter(function(d) { return !d.disabled }))

      d3.transition(linesWrap).call(lines);



      xAxis
        .domain(x.domain())
        .range(x.range())
        .ticks( availableWidth / 100 )
        .tickSize(-availableHeight, 0);

      g.select('.x.axis')
          .attr('transform', 'translate(0,' + y.range()[0] + ')');
      d3.transition(g.select('.x.axis'))
          .call(xAxis);


      yAxis
        .domain(y.domain())
        .range(y.range())
        .ticks( availableHeight / 36 )
        .tickSize( -availableWidth, 0);

      d3.transition(g.select('.y.axis'))
          .call(yAxis);




      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('.series').classed('disabled', false);
            return d;
          });
        }

        selection.transition().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)
      });
*/

      lines.dispatch.on('elementMouseover.tooltip', function(e) {
        dispatch.tooltipShow({
          point: e.point,
          series: e.series,
          pos: [e.pos[0] + margin.left, e.pos[1] + margin.top],
          seriesIndex: e.seriesIndex,
          pointIndex: e.pointIndex
        });
      });

      lines.dispatch.on('elementMouseout.tooltip', function(e) {
        dispatch.tooltipHide(e);
      });

    });


    // If the legend changed the margin's height, need to recalc positions... should think of a better way to prevent duplicate work
    if (margin.top != legend.height())
      chart(selection);
 

    return chart;
  }


  chart.dispatch = dispatch;
  chart.legend = legend;
  chart.xAxis = xAxis;
  chart.yAxis = yAxis;

  d3.rebind(chart, lines, 'x', 'y', 'size', 'xDomain', 'yDomain', 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'id');


  chart.margin = function(_) {
    if (!arguments.length) return margin;
    margin = _;
    return chart;
  };

  chart.width = function(_) {
    if (!arguments.length) return width;
    width = _;
    //width = d3.functor(_);
    return chart;
  };

  chart.height = function(_) {
    if (!arguments.length) return height;
    height = _;
    //height = d3.functor(_);
    return chart;
  };


  return chart;
}