Files
visual-data/VT2-examples/vt2-ch6-codedata-dir/web/barbell/js/barbell.js
T

115 lines
3.0 KiB
JavaScript

// Dimensions of chart.
let margin = { top: 20, right: 20, bottom: 50, left: 290 },
// width = parseInt(d3.select('#chart').style('width'), 10) - margin.left - margin.right,
width = 650 - margin.left - margin.right,
height = 550 - margin.top - margin.bottom;
// Start SVG
let svg = d3.select("#chart").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 + ")");
// Scales: x and y
let x = d3.scaleLinear()
.domain([0, 80])
.range([0, width]);
let y = d3.scaleBand()
// .domain([3, 6])
.range([height, 0]);
let activities;
let xAxis, yAxis, xAxisEl, yAxisEl;
let barbell;
// Load data
const activitiesData = Promise.all([
d3.tsv("data/hh-activities-withkids.tsv", d3.autoType)
]);
activitiesData.then(function(data) {
activities = data[0].sort((a, b) => a.pctkidsf - b.pctkidsf);
// console.log(activities);
// Initialize chart now that data is loaded.
initChart();
});
function initChart() {
// x-axis
xAxis = d3.axisBottom(x)
.tickFormat(d => d + "%")
.ticks(5)
.tickSize(-height-8)
.tickPadding(5);
xAxisEl = svg.append("g")
.attr("class", "x axis bottom")
.attr("transform", "translate(0,"+(height+8)+")");
xAxisEl.append("text")
.attr("class", "axistitle")
.attr("text-anchor", "start")
.attr("x", 0).attr("y", 0)
.attr("dx", "-.75em").attr("dy", "2.5em")
.text("Engaged in Activity");
xAxisEl.call(xAxis);
// y-axis
y.domain(activities.map(d => d.desc));
yAxis = d3.axisLeft(y)
.tickSize(0);
yAxisEl = svg.append("g")
.attr("class", "y axis left")
.attr("transform", "translate("+(-8)+",0)");
yAxisEl.call(yAxis);
// barbells
barbell = svg.selectAll(".barbell")
.data(activities)
.join("g")
.attr("class", "barbell")
.attr("transform", d =>
"translate(0,"+(y(d.desc)+(y.bandwidth()/2))+")")
.attr("id", d => "act"+d.code);
// connecting lines
barbell.append("line")
.attr("x1", d => x(d.pctkidsm))
.attr("x2", d => x(d.pctkidsf))
.attr("y1", 0).attr("y2", 0)
.attr("stroke", "#000000");
// circles
barbell.append("circle")
.attr("class", "men")
.attr("cx", d => x(d.pctkidsm))
.attr("cy", 0)
.attr("r", 6);
barbell.append("circle")
.attr("class", "women")
.attr("cx", d => x(d.pctkidsf))
.attr("cy", 0)
.attr("r", 6);
// labels
svg.append("text")
.attr("x", x(activities[14].pctkidsm))
.attr("y", y(activities[14].desc))
.attr("text-anchor", "middle")
.text("MEN");
svg.append("text")
.attr("x", x(activities[14].pctkidsf))
.attr("y", y(activities[14].desc))
.attr("text-anchor", "middle")
.text("WOMEN");
}