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.
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Favorite tooltip (complex version) v7
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| license: mit |
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| 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 |
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| 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 |
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| <!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> |
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