A5 CS360

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.axis--x path {
  display: none;
}

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 1.5px;
}
.legend-box {
  cursor: pointer;  
}
#mouse-tracker {
  stroke: #E6E7E8;
  stroke-width: 1px;
}
  
</style>
<svg width="960" height="500"></svg>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg"),
    margin = {top: 20, right: 80, bottom: 30, left: 50},
    width = svg.attr("width") - margin.left - margin.right,
    height = svg.attr("height") - margin.top - margin.bottom,
    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var parseTime = d3.timeParse("%Y%m%d");

var x = d3.scaleTime().range([0, width]),
    y = d3.scaleLinear().range([height, 0]),
    z = d3.scaleOrdinal(d3.schemeCategory10);

var line = d3.line()
    .curve(d3.curveBasis)
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.temperature); });
  
var color = d3.scaleOrdinal().range(["#48A36D",  "#56AE7C",  "#64B98C", "#72C39B", "#80CEAA", "#80CCB3", "#7FC9BD", "#7FC7C6", "#7EC4CF", "#7FBBCF", "#7FB1CF", "#80A8CE", "#809ECE", "#8897CE", "#8F90CD", "#9788CD", "#9E81CC", "#AA81C5", "#B681BE", "#C280B7", "#CE80B0", "#D3779F", "#D76D8F", "#DC647E", "#E05A6D", "#E16167", "#E26962", "#E2705C", "#E37756", "#E38457", "#E39158", "#E29D58", "#E2AA59", "#E0B15B", "#DFB95C", "#DDC05E", "#DBC75F", "#E3CF6D", "#EAD67C", "#F2DE8A"]);  
  
d3.tsv("data.tsv", type, function(error, data) {
  if (error) throw error;

x.domain(d3.extent(data, function(d) { return d.date; }));

y.domain([
    d3.min(cities, function(c) { return d3.min(c.values, function(d) { return d.temperature; }); }),
    d3.max(cities, function(c) { return d3.max(c.values, function(d) { return d.temperature; }); })
  ]);

z.domain(cities.map(function(c) { return c.id; }));

g.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

g.append("g")
      .attr("class", "axis axis--y")
      .call(d3.axisLeft(y))
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", "0.71em")
      .attr("fill", "#000")
      .text("Temperature, ºF");

var city = g.selectAll(".city")
    .data(cities)
    .enter().append("g")
      .attr("class", "city");

city.append("path")
      .attr("class", "line")
    	.attr("id", function(d) {
        return "line-" + d.id.replace(" ", "").replace("/", ""); // Give line id of line-(insert issue name, with any spaces replaced with no spaces)
      })
     	.attr("d",function(d){ 
    		return d.visible ? line(d.values) : null; 
  		}) 
  	  .attr("d", function(d) { return line(d.values); })
	
      .style("stroke", function(d) { return z(d.id); });

city.append("text")

.datum(function(d) { return {id: d.id, value: d.values[d.values.length - 1]}; })
      .attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")"; })
      .attr("x", 3)
      .attr("dy", "0.35em")
      .style("font", "10px sans-serif")
      .text(function(d) { return d.id; })
    	.style("fill",function(d){return d.visible ? color(d.id):"#000000"}) 
      .attr("class", "legend-box")
  
      .on("click", function(d){
      	d.visible = !d.visible; 
    		console.log(d.id, d.visible);
//     		d3.select("#line-" + d.id.replace(" ", "").replace("/", ""))
//           return d.visible ? line(d.values) : null;
        
        
    //CAN'T TRIGGER CLICK ?
    		city.select("path")
          .transition()
          .attr("d", function(d){
            return d.visible ? line(d.values) : null; // If d.visible is true then draw line for this d selection
          })
  		})
    	.on("mouseover", function(d){

d3.select(this)
          .transition()
          .attr("fill", function(d) { return color("F1F1F2"); })

d3.select("#line-" + d.id.replace(" ", "").replace("/", ""))
          .transition()
          .style("stroke-width", 2.5);  
        
    		d3.selectAll("#line-" + d.id.replace(" ", "").replace("/", ""))
          .transition()
          .style("stroke-width", 2.5);  
      })
			
      .on("mouseout", function(d){
    
        d3.select("#line-" + d.id.replace(" ", "").replace("/", ""))
          .transition()
          .style("stroke-width", 1.5);
      })
;
 	
});

function type(d, _, columns) {
  d.date = parseTime(d.date);
  for (var i = 1, n = columns.length, c; i < n; ++i) d[c = columns[i]] = +d[c];
  return d;
}

</script>

https://d3js.org/d3.v4.min.js