main3.js

import * as d3v6 from "d3-v6"

// set the dimensions and margins of the graph
const margin = {top: 10, right: 30, bottom: 20, left: 50},
    width = 1000 - margin.left - margin.right,
    height = 600 - margin.top - margin.bottom;

// append the svg object to the body of the page
const svg = d3v6.select("#my_dataviz3")
  .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})`);

// Parse the Data
d3v6.csv("gender.csv").then( function(data) {

  // List of subgroups = header of the csv files = soil condition here
  const subgroups = data.columns.slice(1)

  // List of groups = species here = value of the first column called group -> I show them on the X axis
  const groups = data.map(d => d.group)

  // Add X axis
  const x = d3v6.scaleBand()
      .domain(groups)
      .range([0, width])
      .padding([0.2])
  svg.append("g")
    .attr("transform", `translate(0, ${height})`)
    .call(d3v6.axisBottom(x).tickSizeOuter(0));

  // Add Y axis
  const y = d3v6.scaleLinear()
    .domain([0, 100])
    .range([ height, 0 ]);
  svg.append("g")
    .call(d3v6.axisLeft(y));

  // color palette = one color per subgroup
  const color = d3v6.scaleOrdinal()
    .domain(subgroups)
    .range(['#6495ED','#ff1493','#d9d574'])

  //stack the data? --> stack per subgroup
  const stackedData = d3v6.stack()
    .keys(subgroups)
    (data)




  // ----------------
  // Create a tooltip
  // ----------------
  const tooltip = d3v6.select("#my_dataviz3")
    .append("div")
    .style("opacity", 0)
    .attr("class", "tooltip")
    .style("background-color", "white")
    .style("border", "solid")
    .style("border-width", "1px")
    .style("border-radius", "5px")
    .style("padding", "10px")
    .style("width","150px");

  // Three function that change the tooltip when user hover / move / leave a cell
  const mouseover = function(event, d) {
    const subgroupName = d3v6.select(this.parentNode).datum().key;
    const subgroupValue = d.data[subgroupName];
    tooltip
        .html("subgroup: " + subgroupName + "<br>" + "Value: " + subgroupValue)
        .style("opacity", 1)
        
  }
  const mousemove = function(event, d) {
    tooltip.style("transform","translateY(-55%)")  
           .style("left",(event.x)/2+"px")
           .style("top",(event.y)/2-30+"px")
  }
  const mouseleave = function(event, d) {
    tooltip
      .style("opacity", 0)
  }

  // Show the bars
  svg.append("g")
    .selectAll("g")
    // Enter in the stack data = loop key per key = group per group
    .data(stackedData)
    .join("g")
      .attr("fill", d => color(d.key))
      .selectAll("rect")
      // enter a second time = loop subgroup per subgroup to add all rectangles
      .data(d => d)
      .join("rect")
        .attr("x", d =>  x(d.data.group))
        .attr("y", d => y(d[1]))
        .attr("height", d => y(d[0]) - y(d[1]))
        .attr("width",x.bandwidth())
        .attr("stroke", "grey")
      .on("mouseover", mouseover)
      .on("mousemove", mousemove)
      .on("mouseleave", mouseleave)

})