multiline chart with tooltip

forked from anonymous's block: multiline chart with tooltip

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
  
    
body { font: 12px Arial;}
    .bar{
      fill: rgb(44, 160, 44);
    }
path { 
    stroke: steelblue;
    stroke-width: 2;
    fill: none;
}

.axis path,
.axis line {
    fill: none;
    stroke: grey;
    stroke-width: 1;
    shape-rendering: crispEdges;
}

.legend {
    font-size: 16px;
    font-weight: bold;
    text-anchor: middle;
    text-decoration: underline;
}
  </style>
</head>
  
<body>
  <div id='tooltip' style='position:absolute;background-color:lightgray;padding:5px'></div>
  <script>
    var data = [];
	var margin = {top: 60, right: 50, bottom: 200, left: 50},
  width = 700 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom;
    
  var svg = d3.select("body")
    .append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
    .append("g")
        .attr("transform", 
              "translate(" + margin.left + "," + margin.top + ")");
  var color = d3.scaleOrdinal(d3.schemeCategory10);
  var parseDate = d3.timeParse("%m/%d/%Y");
var formatDate = d3.timeFormat("%m/%d/%Y");
  var x = d3.scaleBand().range([0, width]).padding(0.3);
  var y = d3.scaleLinear().range([height, 0]);
  // Define the axes
var xAxis = d3.axisBottom().scale(x).
    ticks(5).tickFormat(formatDate);
 
var yAxis = d3.axisLeft().scale(y).ticks(5);
  var valueline = d3.line() 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.value); });
    
const tooltip = d3.select('#tooltip');
const tooltipLine = svg.append('line');
     let  tipBox;  
  tipBox = svg.append('rect')
    .attr('width', width)
    .attr('height', height)
    .attr('opacity', 0)
    .on('mousemove', drawTooltip)
    .on('mouseout', removeTooltip);

d3.json('data.json',(err,d) => {
   
    
    d.forEach(di => {
      data.push({
        date: parseDate(di.date),
        name: di.name,
        value: +di.value
      });
    });
     
    x.domain(data.map(function(d) { return d.date; }));
    y.domain([0, d3.max(data, d => d.value)]);
   
   
    
    
    var dataNest = d3.nest()
    .key(function(d) {return d.name;})
    .entries(data);
     x.invert = (function(){
    var domain = x.domain()
    var range = x.range()
    var scale = d3.scaleQuantize().domain(range).range(domain)

return function(x){
        return scale(x)
    }
})()
     
     
     dataNest.forEach(function(d,i) { 
       svg.append("path")
           .attr("class", "line")
           .style("stroke", () => d.color = color(d.key))
            .attr("id", 'tag'+d.key.replace(/\s+/g, ''))
            .attr("d", valueline(d.values));
       
       
       legendSpace =125;
       svg.append("text")
            .attr("x", (legendSpace/2)+i*legendSpace)  // space legend
            .attr("y", -20 )
            .attr("class", "legend")    // style the legend
            .style("fill", function() { // Add the colours dynamically
                return d.color = color(d.key); })
            .on("click", function(){
                // Determine if current line is visible 
                var active   = d.active ? false : true,
                newOpacity = active ? 0 : 1; 
                // Hide or show the elements based on the ID
                d3.select("#tag"+d.key.replace(/\s+/g, ''))
                    .transition().duration(100) 
                    .style("opacity", newOpacity); 
                // Update whether or not the elements are active
          d.active = active;
          
            this.innerHTML = d.active ?  d.key+'+' : d.key+'-';
          
          
                
                })  
            .text(d.key+'-');

});
       
       
     
     svg.append("text")
            .attr("x", (legendSpace/2)+3*legendSpace)  // space legend
            .attr("y", -20 )
            .attr("class", "legend")    // style the legend
            .style("fill", function() { // Add the colours dynamically 
                return d.color = color(d.key); })
            .on("click", function(){
              var op = document.getElementById('bars-group').style.opacity;
       
       var newOp = (op ==1 ? 0 : 1);
       document.getElementById('bars-group').style.opacity = newOp;
       if(newOp){
         this.innerHTML = 'Option Volume -';
       }else{
         this.innerHTML ='Option Volume +';
       } 
                 })  
             .text('Option Volume -');

svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis)
    .selectAll("text")
      .style("text-anchor", "end")
      .attr("dx", "-.8em")
      .attr("dy", "-.55em")
      .attr("transform", "rotate(-70)" );;

svg.append("g")
        .attr("class", "y axis")
        .call(yAxis);
    
    
    
    
  var optionData = [
   {
      "date": "3/7/2018",
      "name": "Options Volume",
      "value": 195
   },
   {
      "date": "3/6/2018",
      "name": "Options Volume",
      "value": 21629
   },
   {
      "date": "3/5/2018",
      "name": "Options Volume",
      "value": 22606
   },
   {
      "date": "3/2/2018",
      "name": "Options Volume",
      "value": 41022
   },
   {
      "date": "3/1/2018",
      "name": "Options Volume",
      "value": 45224
   },
   {
      "date": "2/28/2018",
      "name": "Options Volume",
      "value": 28676
   },
   {
      "date": "2/27/2018",
      "name": "Options Volume",
      "value": 39206
   },
   {
      "date": "2/26/2018",
      "name": "Options Volume",
      "value": 37144
   },
   {
      "date": "2/23/2018",
      "name": "Options Volume",
      "value": 32383
   },
   {
      "date": "2/22/2018",
      "name": "Options Volume",
      "value": 30552
   },
   {
      "date": "2/21/2018",
      "name": "Options Volume",
      "value": 35690
   },
   {
      "date": "2/20/2018",
      "name": "Options Volume",
      "value": 29094
   },
   {
      "date": "2/16/2018",
      "name": "Options Volume",
      "value": 50932
   },
   {
      "date": "2/15/2018",
      "name": "Options Volume",
      "value": 61914
   },
   {
      "date": "2/14/2018",
      "name": "Options Volume",
      "value": 55138
   },
   {
      "date": "2/13/2018",
      "name": "Options Volume",
      "value": 35172
   },
   {
      "date": "2/12/2018",
      "name": "Options Volume",
      "value": 40909
   }
];
  
  var optData = [];
  optionData.forEach(di => {
      optData.push({
        date: parseDate(di.date),
        name: di.name,
        value: +di.value
      });
    });
  
  var yscaleRight = d3.scaleLinear().
  domain([0, d3.max(optData, function(d) { 
       return d.value; })]).range([height, 0]);
    
 
    
var yAxisRight = d3.axisRight().scale(yscaleRight).ticks(5);
   
  svg.append('g').attr('id','bars-group')
    .style('opacity',1).selectAll(".bar")
    .data(optData)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.date); })
      .attr("y", function(d) { return yscaleRight(d.value); })
      .attr("width", x.bandwidth())
      .attr("height", function(d) { return height - yscaleRight(d.value); });
    
    
        svg.append("g")
      .attr("class", "y axis")
      .attr("transform", "translate( " + width + ", 0 )")
      .call(yAxisRight);
  });
    
function removeTooltip() {
  if (tooltip) tooltip.style('display', 'none');
  if (tooltipLine) tooltipLine.attr('stroke', 'none');
}
  
  
function drawTooltip() {

const date = x.invert(d3.mouse(tipBox.node())[0])

tooltipLine.attr('stroke', 'black')
    .attr('x1', x(date))
    .attr('x2', x(date))
    .attr('y1', 0)
    .attr('y2', height);
  var dataSelected =  [];
  
  var t = data.forEach(id => {

if((new Date(id.date).getTime() == new Date(date).getTime()) ){
      dataSelected.push(id);
    }
  }); 
  tooltip.html(formatDate(date))
    .style('display', 'block')
    .style('left', d3.event.pageX + 20+'px')
    .style('top', d3.event.pageY - 20+'px')
    .selectAll()
    .data(dataSelected).enter()
    .append('div')
    .style('color', (d,i) => {
    if(d.name=='IV 30'){
      return "blue";
    }else{
      return "red";
    }
  })
    .html(d => d.name + "<br/>" + d.value) ;
    
  
  
  
}

</script>

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