This is a follow on from the simple tooltip graph written with d3.js v7.
It extends a tooltip technique which I find particularly neat.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 7 of d3.js.
license: mit |
This is a follow on from the simple tooltip graph written with d3.js v7.
It extends a tooltip technique which I find particularly neat.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 7 of d3.js.
date | close | |
---|---|---|
26-Mar-12 | 606.98 | |
27-Mar-12 | 614.48 | |
28-Mar-12 | 617.62 | |
29-Mar-12 | 609.86 | |
30-Mar-12 | 599.55 | |
2-Apr-12 | 618.63 | |
3-Apr-12 | 629.32 | |
4-Apr-12 | 624.31 | |
5-Apr-12 | 633.68 | |
9-Apr-12 | 636.23 | |
10-Apr-12 | 628.44 | |
11-Apr-12 | 626.20 | |
12-Apr-12 | 622.77 | |
13-Apr-12 | 605.23 | |
16-Apr-12 | 580.13 | |
17-Apr-12 | 543.70 | |
18-Apr-12 | 443.34 | |
19-Apr-12 | 345.44 | |
20-Apr-12 | 234.98 | |
23-Apr-12 | 166.70 | |
24-Apr-12 | 130.28 | |
25-Apr-12 | 99.00 | |
26-Apr-12 | 89.70 | |
27-Apr-12 | 67.00 | |
30-Apr-12 | 53.98 | |
1-May-12 | 58.13 |
date | close | |
---|---|---|
1-May-12 | 58.13 | |
30-Apr-12 | 53.98 | |
27-Apr-12 | 67.00 | |
26-Apr-12 | 89.70 | |
25-Apr-12 | 99.00 | |
24-Apr-12 | 130.28 | |
23-Apr-12 | 166.70 | |
20-Apr-12 | 234.98 | |
19-Apr-12 | 345.44 | |
18-Apr-12 | 443.34 | |
17-Apr-12 | 543.70 | |
16-Apr-12 | 580.13 | |
13-Apr-12 | 605.23 | |
12-Apr-12 | 622.77 | |
11-Apr-12 | 626.20 | |
10-Apr-12 | 628.44 | |
9-Apr-12 | 636.23 | |
5-Apr-12 | 633.68 | |
4-Apr-12 | 624.31 | |
3-Apr-12 | 629.32 | |
2-Apr-12 | 618.63 | |
30-Mar-12 | 599.55 | |
29-Mar-12 | 609.86 | |
28-Mar-12 | 617.62 | |
27-Mar-12 | 614.48 | |
26-Mar-12 | 606.98 |
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> /* set the CSS */ | |
body { font: 12px Arial;} | |
.line { | |
fill: none; | |
stroke: steelblue; | |
stroke-width: 2px; | |
} | |
</style> | |
<body> | |
<!-- load the d3.js library --> | |
<script src="https://d3js.org/d3.v7.min.js"></script> | |
<script> | |
// set the dimensions and margins of the graph | |
var margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
// parse the date / time | |
var parseTime = d3.timeParse("%d-%b-%y"), | |
formatDate = d3.timeFormat("%d-%b"), | |
bisectDate = d3.bisector(function(d) { return d.date; }).left; | |
// set the ranges | |
var x = d3.scaleTime().range([0, width]); | |
var y = d3.scaleLinear().range([height, 0]); | |
// define the line | |
var valueline = d3.line() | |
.x(function(d) { return x(d.date); }) | |
.y(function(d) { return y(d.close); }); | |
// append the svg obgect to the body of the page | |
// appends a 'group' element to 'svg' | |
// moves the 'group' element to the top left margin | |
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 + ")"); | |
// Adding a separate group to 'layer' the objects | |
var lineSvg = svg.append("g"); | |
var focus = svg.append("g") | |
.style("display", "none"); | |
// Get the data | |
d3.csv("atad.csv").then(function(data) { | |
// format the data | |
data.forEach(function(d) { | |
d.date = parseTime(d.date); | |
d.close = +d.close; | |
}); | |
// Scale the range of the data | |
x.domain(d3.extent(data, function(d) { return d.date; })); | |
y.domain([0, d3.max(data, function(d) { return d.close; })]); | |
// Add the valueline path. | |
lineSvg.append("path") | |
.data([data]) | |
.attr("class", "line") | |
.attr("d", valueline); | |
// Add the X Axis | |
svg.append("g") | |
.attr("transform", "translate(0," + height + ")") | |
.call(d3.axisBottom(x)); | |
// Add the Y Axis | |
svg.append("g") | |
.call(d3.axisLeft(y)); | |
// append the x line | |
focus.append("line") | |
.attr("class", "x") | |
.style("stroke", "blue") | |
.style("stroke-dasharray", "3,3") | |
.style("opacity", 0.5) | |
.attr("y1", 0) | |
.attr("y2", height); | |
// append the y line | |
focus.append("line") | |
.attr("class", "y") | |
.style("stroke", "blue") | |
.style("stroke-dasharray", "3,3") | |
.style("opacity", 0.5) | |
.attr("x1", width) | |
.attr("x2", width); | |
// append the circle at the intersection | |
focus.append("circle") | |
.attr("class", "y") | |
.style("fill", "none") | |
.style("stroke", "blue") | |
.attr("r", 4); | |
// place the value at the intersection | |
focus.append("text") | |
.attr("class", "y1") | |
.style("stroke", "white") | |
.style("stroke-width", "3.5px") | |
.style("opacity", 0.8) | |
.attr("dx", 8) | |
.attr("dy", "-.3em"); | |
focus.append("text") | |
.attr("class", "y2") | |
.attr("dx", 8) | |
.attr("dy", "-.3em"); | |
// place the date at the intersection | |
focus.append("text") | |
.attr("class", "y3") | |
.style("stroke", "white") | |
.style("stroke-width", "3.5px") | |
.style("opacity", 0.8) | |
.attr("dx", 8) | |
.attr("dy", "1em"); | |
focus.append("text") | |
.attr("class", "y4") | |
.attr("dx", 8) | |
.attr("dy", "1em"); | |
// append the rectangle to capture mouse | |
svg.append("rect") | |
.attr("width", width) | |
.attr("height", height) | |
.style("fill", "none") | |
.style("pointer-events", "all") | |
.on("mouseover", function() { focus.style("display", null); }) | |
.on("mouseout", function() { focus.style("display", "none"); }) | |
.on("mousemove", mousemove); | |
function mousemove() { | |
var x0 = x.invert(d3.pointer(event,this)[0]), | |
i = bisectDate(data, x0, 1), | |
d0 = data[i - 1], | |
d1 = data[i], | |
d = x0 - d0.date > d1.date - x0 ? d1 : d0; | |
focus.select("circle.y") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")"); | |
focus.select("text.y1") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")") | |
.text(d.close); | |
focus.select("text.y2") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")") | |
.text(d.close); | |
focus.select("text.y3") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")") | |
.text(formatDate(d.date)); | |
focus.select("text.y4") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")") | |
.text(formatDate(d.date)); | |
focus.select(".x") | |
.attr("transform", | |
"translate(" + x(d.date) + "," + | |
y(d.close) + ")") | |
.attr("y2", height - y(d.close)); | |
focus.select(".y") | |
.attr("transform", | |
"translate(" + width * -1 + "," + | |
y(d.close) + ")") | |
.attr("x2", width + width); | |
} | |
}); | |
</script> | |
</body> |
Very neat and clean design. The little drop shadow effect is elegant yet useful.