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<script>
var margin = {top: 5, right: 20, bottom: 40, left: 80},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
 
// setup x
var xValue = function(d) { return d.Text;}, // data -> value
    xScale = d3.scale.linear().range([0, width]), // value -> display
    xMap = function(d) { return xScale(xValue(d));}, // data -> display
    xAxis = d3.svg.axis().scale(xScale).orient("bottom");
 
// setup y
var yValue = function(d) { return d["Energie"];}, // data -> value
    yScale = d3.scale.linear().range([height, 0]), // value -> display
    yMap = function(d) { return yScale(yValue(d));}, // data -> display
    yAxis = d3.svg.axis().scale(yScale).orient("left");
 
// setup fill color
var cValue = function(d) { return d.Nom;},
    color = d3.scale.ordinal().range(["#32CD32", "#FF00FF", "#FFA500", "#1E90FF", "#FFD700", "#ff7f0e","#FF0000"]); //d3.scale.category10();
 
// add the graph canvas to the body of the webpage
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 + ")");
 
// add the tooltip area to the webpage
var tooltip = d3.select("body").append("div")
    .attr("class", "tooltip")
    .style("opacity", 0);
 
// load data
d3.csv("data.txt", function(error, data) {
 
  // change string (from CSV) into number format
  data.forEach(function(d) {
    d.Text = +d.Text;
    d["Energie"] = +d["Energie"];
//    console.log(d);
  });
 
  // don't want dots overlapping axis, so add in buffer to data domain
  xScale.domain([d3.min(data, xValue)-1, d3.max(data, xValue)+1]);
  yScale.domain([d3.min(data, yValue)-1, d3.max(data, yValue)+1]);
 
  // x-axis
  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .attr("class", "label")
      .attr("x", width)
      .attr("y", 30)
      .style("text-anchor", "end")
      .text("Temperature Exterieure (Degre C)");
 
  // y-axis
  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("class", "label")
      .attr("transform", "rotate(-90)")
      .attr("y", -75)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Energie (Kwh/Jour)");
 
  // draw dots
  svg.selectAll(".dot")
      .data(data)
    .enter().append("circle")
      .attr("class", "dot")
      .attr("r", 4)
      .attr("cx", xMap)
      .attr("cy", yMap)
      .style("fill", function(d) { return color(cValue(d));})
      .on("mouseover", function(d) {
          tooltip.transition()
               .duration(200)
               .style("opacity", 100);
          tooltip.html(d["Nom"] + "<br/> (" + xValue(d)
            + ", " + yValue(d) + ")") // je souhaiterais ajouter ici ajouter l'affichage de date du point
               .style("left", (d3.event.pageX + 5) + "px")
               .style("top", (d3.event.pageY - 28) + "px");
      })
      .on("mouseout", function(d) {
          tooltip.transition()
               .duration(1000)
               .style("opacity", 0);
      });
 
  // draw legend
  var legend = svg.selectAll(".legend")
      .data(color.domain())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
 
  // draw legend colored rectangles
  legend.append("rect")
      .attr("x", width)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);
 
  // draw legend text
  legend.append("text")
      .attr("x", width - 5)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .style("fill", color)
      .text(function(d) { return d;})
});
 
</script> | 
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