D3 Examples - TP2

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https://bl.ocks.org/BoltMaud/4b4455328abe5f4913411e68ca3fb04b/146d7764c5cb155f42fb230739f59a06a36686d9
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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    .line {
      fill: none;
      stroke: black;
      stroke-width: 1.5px;
    }
    .text{
      color:black;
      font-size:20;
    }
  </style>
</head>
​
<body>
    <svg height="6" width="6" xmlns="https://www.w3.org/2000/svg" version="1.1"> <defs> <pattern id="whitecarbone" patternUnits="userSpaceOnUse" width="6" height="6"> <image xlink:href="data:image/svg+xml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJyB3aWR0aD0nNicgaGVpZ2h0PSc2Jz4KICA8cmVjdCB3aWR0aD0nNicgaGVpZ2h0PSc2JyBmaWxsPScjZWVlZWVlJy8+CiAgPGcgaWQ9J2MnPgogICAgPHJlY3Qgd2lkdGg9JzMnIGhlaWdodD0nMycgZmlsbD0nI2U2ZTZlNicvPgogICAgPHJlY3QgeT0nMScgd2lkdGg9JzMnIGhlaWdodD0nMicgZmlsbD0nI2Q4ZDhkOCcvPgogIDwvZz4KICA8dXNlIHhsaW5rOmhyZWY9JyNjJyB4PSczJyB5PSczJy8+Cjwvc3ZnPg==" x="0" y="0" width="6" height="6"> </image> </pattern> </defs> </svg>
  <script>
​
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);
​
    var width = 800;
    var height = 400;
​
    // See formats https://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
    // Data sample {"name": "G", "value": 10, "date": "2016-07"}
    var parseDate = d3.timeParse("%Y-%m");
    var displayDate = d3.timeFormat("%b %y");
    var displayValue = d3.format(",.0f");
​
    // Ordinal scale
    var x = d3.scaleTime()
        .range([0, width]);
​
        // Linear scale
    var y = d3.scaleLinear()
        .range([height, height - 200]);
​
    var g = svg.append("g")
        .attr("transform", "translate(50, 0)")
​
    var line = d3.line()
        .x(function(d) { return x(d.date); })
        .y(function(d) { return y(d.value); });
​
    d3.json("dataset.json", function(error, data) {
        if (error) throw error;
​
      // Pre-processing
      data.forEach(function(d) {
                d.value = +d.value;
        d["date"] = parseDate(d["date"]);
      });
​
      x.domain(d3.extent(data, function(d) { return d.date; }));
            y.domain([0, d3.max(data, function(d) { return d.value; })]);
​
      svg.selectAll(".label").data(data).enter()
       .append("text")
        .attr("class", "label")
        .text(function(d, i) { return displayDate(d.date); })
        .attr("y", 420)
        .attr("x", function(d) { return x(d.date); })
        .style("font-size", 10)
        .style("font-family", "monospace");
​
      // Display last value
      g.selectAll(".value").data([data[data.length -1]]).enter()
       .append("text")
        .text(function(d, i) { return displayValue(d.value); })
        .attr("class", "value")
        .attr("y", function(d) { return y(d.value); })
        .attr("x", width + 10)
        .style("font-size", 20)
        .style("font-family", "monospace");
​
      g.selectAll(".line").data([data]).enter().append("path")
        .attr("class", "line")
        .attr("d", line);
​
        var circles =g.selectAll("circle").data(data).enter();
​
    var attrcicles =circles
       .append("svg:circle")
      .attr("cx",function(d){return x(d.date)})
      .attr("cy",function(d){return y(d.value)})
      .attr("r",10)
        .attr("opacity",0.7)
        .style("fill", "url(#whitecarbone)");
​
        attrcicles.on("mouseover",displayElement)
    .on("mouseout",hideElement);
​
    var circles_labels=circles
        .append("text")
            .text(function(d){return d.value })
        .attr("font-family", "sans-serif")
        .attr("font-size", "20px")
            .attr("display","none")
        .attr("x",function(d){return x(d.date)+5})
        .attr("y",function(d){return y(d.value)-15});
​
    function displayElement(d,i){
           d3.select(this).style("fill","red")
           .attr("opacity",1)
​
           d3.selectAll("text").filter(function(e,j){
             return i+1 === j;
           })
           .style("display","block");
​
        g.append("line")
          .style("stroke", "black")
          .attr("x1", x(d.date))
          .attr("y1", y(d.value))
          .attr("x2", x(d.date))
          .attr("y2",400 )
            .attr("id","uniqueLine")
          .style("stroke-dasharray", ("3, 3"))
                    .style("opacity", 0.9);
​
    }
    function hideElement(d,i){
            d3.select(this).style("fill","url(#whitecarbone)")
                     .attr("opacity",0.7);
​
          d3.selectAll("text").filter(function(e,j){
             return i+1 === j;
           })
           .style("display","none");
        g.select("#uniqueLine").remove();
    }
​
​
​
​
    });
​
  </script>
</body>
​
    