D3 Examples - Rendu TP2 DatViz

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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;
    }
    
    .circle {
      fill: #DCDCDC;
    }
    
  </style>
</head>
​
<body>
  <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 line = d3.line()
        .x(function(d) { return x(d.date); })
        .y(function(d) { return y(d.value); });
    
    var g = svg.append("g")
        .attr("transform", "translate(50, 0)")
    
    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)+30; })
        .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+30)
        .style("font-size", 20)
        .style("font-family", "monospace");
​
      // cercles gris au niveaux des valeurs
      g.selectAll("circle").data(data).enter().append("circle")
        .attr("class","circle")
        .attr("r", 10)
        .attr("cx",function(d) { return x(d.date);})
        .attr("cy",function(d) { return y(d.value);});
      
      g.selectAll(".line").data([data]).enter().append("path")
        .attr("class", "line")
        .attr("d", line);
      
        // Pour que le rouge soit par dessus de la ligne
      g.selectAll("circle2").data(data).enter().append("circle")
        .style("fill","transparent")
        .attr("r", 10)
        .attr("cx",function(d) { return x(d.date);})
        .attr("cy",function(d) { return y(d.value);})
            .on("mouseover", function(d, i) {
       
        d3.select(this).style("fill", "red");
​
        g.append("line")
        .style("style","dashed")
        .attr("id","l"+i)
        .attr("x1", x(d.date)) 
                .attr("y1", height)
                .attr("x2", x(d.date))
                .attr("y2", y(d.value))
        .attr("stroke-dasharray",7)
        .attr("stroke","black")
        .attr("stroke-width",0.5);
        
        g.append("text")
        .attr("id","t"+i)
        .attr("y", y(d.value)-15)
        .attr("x", x(d.date))
        .style("font-family", "monospace")
        .style("font-size", 15)
        .style("font-weight","bold")
        .text(function() {
              return d.value; 
            })
        
      
        })
      
        .on("mouseout", function(d, i) {
        d3.select(this).transition().duration(200).style("fill", "transparent");
        
        // Should be using Ids instead of values
        d3.select("#t"+i).remove();
        d3.select("#l"+i).remove();
      }); 
    });
​
  </script>
</body>
​
    