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  <title>CS498DV</title>

  <!-- Bootstrap core CSS -->

  <link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
  <script src='https://d3js.org/d3.v5.min.js'></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>


  <style>
  .chart circle {fill: #69b3a2; stroke: black;}
  #tooltip {
    opacity: 0;
    position: absolute;
    text-align: left;
    width: 150px; height: 80px;
    background: white;
    border: solid;
    border-width: 1px;
    border-radius: 5px;
  }
  </style>
</head>

<body onload='init()'>

  <!-- Navigation -->
  <nav class="navbar navbar-expand-lg navbar-dark bg-dark static-top">
    <div class="container">
      <a class="navbar-brand" href="#">CS498 Data Visualization</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
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      <div class="collapse navbar-collapse" id="navbarResponsive">
        <ul class="navbar-nav ml-auto">
          <li class="nav-item">
            <a class="nav-link" href="https://github.com/rasterroo/CS498DV">Github</a>
          </li>
        </ul>
      </div>
    </div>
  </nav>

  <!-- Page Content -->
  <div class="container">
    <div class="row">
      <div class="col-lg-12 text-center">
        <h1 class="mt-5">2017 Automobile Data</h1>

        <svg class="chart" width=600 height=600></svg>
        <div id="tooltip"></div>

        <script>
          async function init() {

            const data = await d3.csv('https://flunky.github.io/cars2017.csv');

            var x = d3.scaleLog()
                .base(10)
                .domain([10,150])
                .range([0, 500]);

            var y = d3.scaleLog()
                .base(10)
                .domain([10,150])
                .range([500,0]);

            var tooltip = d3.select("#tooltip");

            d3.select('svg')
              .attr("width", 600)
              .attr("height", 600)
              .append("g")
                .attr("transform", "translate(50,50)")
              .selectAll('circle')
              .data(data)
              .enter()
              .append('circle')
                .attr('cx',function(d) {return x(d.AverageCityMPG);})
                .attr('cy',function(d) {return y(d.AverageHighwayMPG);})
                .attr('r', function(d) {return (2+parseInt(d.EngineCylinders))*1.5;})
                .style("opacity", 0.4)
              .on("mouseover", function(d,i) {
                tooltip
                  .style("opacity",1)
                  .style("left", (d3.mouse(this)[0]+350) + "px")
                  .style("top", (d3.mouse(this)[1]+120) + "px")
                  .html("Make : "+d.Make);
              })
              .on("mouseout", function() { tooltip.style("opacity",0) });


            xs = d3.scaleLog()
                .base(10)
                .domain([10,150])
                .range([0, 500]);
            ys = d3.scaleLog()
                .base(10)
                .domain([10,150])
                .range([500,0]);

            d3.select('svg').append('g')
              .attr("transform", "translate(50,50)")
              .call(d3.axisLeft(ys).tickValues([10,20,50,100]).tickFormat(d3.format("~s")));
            d3.select('svg').append('g')
              .attr("transform", "translate(50,550)")
              .call(d3.axisBottom(xs).tickValues([10,20,50,100]).tickFormat(d3.format("~s")));

        }
      </script>
      </div>
    </div>
  </div>


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