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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<div id="chart"></div> |
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<style> |
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body { |
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font: 10px Arial; |
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} |
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.axis path { |
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display: none; |
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} |
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.axis line { |
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stroke-opacity: 0.3; |
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} |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 1.5px; |
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} |
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.site--hover { |
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stroke: #000; |
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stroke-width: 4px; |
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} |
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button { |
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position: absolute; |
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top: 20px; |
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left: 80px; |
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} |
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.voronoi path { |
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fill: none; |
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pointer-events: all; |
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} |
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.voronoi--show path { |
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stroke: red; |
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stroke-opacity: 0.2; |
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} |
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</style> |
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<body> |
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<button>Reset</button> |
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<label id="form" for="show-voronoi"> |
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Show Voronoi |
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<input type="checkbox" id="show-voronoi" disabled> |
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</label> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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var margin = {top: 20, right: 20, bottom: 50, left: 50}, |
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width = 1000 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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var parseTime = d3.timeParse("%d/%m/%Y %H:%M"); |
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bisectDate = d3.bisector(function(d) { return d.dt; }).left; |
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formatValue = d3.format(",.2f"), |
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formatCurrency = function(d) { return "£" + formatValue(d); }; |
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var x = d3.scaleTime() |
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.range([0, width]); |
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var y = d3.scaleLinear() |
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.range([height, 0]); |
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var z = d3.scaleOrdinal(d3.schemeCategory10); |
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var voronoi = d3.voronoi() |
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.x(function(d) { return x(d.dt); }) |
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.y(function(d) { return y(d.price); }) |
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.extent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]); |
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svg = d3.select('#chart') |
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.append("svg:svg") |
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.attr('width', width + margin.left + margin.right) |
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.attr('height', height + margin.top + margin.bottom) |
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.append("svg:g") |
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.attr("id","group") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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// Get the data |
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d3.csv("data_long.csv", function(error, data) { |
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if (error) throw error; |
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data.forEach(function(d,i) { |
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d.dt = parseTime(d.dt); |
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d.price = +d.price; |
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}); |
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var nest=d3.nest() |
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.key(function(d) {return d.site;}) |
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.sortKeys(d3.ascending) |
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.entries(data); |
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sites = {}; |
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d3.map(data, function(d){return d.site;}) |
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.keys() // unique sites |
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.forEach(function(d,i) {sites[d] = nest[i].values}); |
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console.log("sites4:", sites); |
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// Scale the range of the data |
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var date_max = d3.max(data, function(d) { return d.dt; }); |
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console.log("Date range: ", d3.extent(data, function(d) { return d.dt; })); |
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x.domain(d3.extent(data, function(d) { return d.dt; })); |
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y.domain(d3.extent(data, function(d) { return d.price; })); |
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z.domain(d3.map(data, function(d){return d.site;}).keys()); |
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var zoom = d3.zoom() |
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.scaleExtent([0.75, 15000]) |
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.translateExtent([[-100000, -100000], [100000, 100000]]) |
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.on("zoom", zoomed); |
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var xAxis = d3.axisBottom(x) |
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.ticks((width + 2) / (height + 2) * 5) |
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.tickSize(-height) |
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.tickPadding(10); |
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var yAxis = d3.axisRight(y) |
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.ticks(5) |
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.tickSize(width) |
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.tickPadding(- 20 - width); |
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svg.append("text") |
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.attr("transform", |
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"translate(" + (width/2) + " ," + (height + margin.top + 20) + ")") |
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.style("font-size","12px") |
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.style("font-family", "sans-serif") |
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.style("text-anchor", "middle") |
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.text("Date/Time"); |
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svg.append("text") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 0 - margin.left/1.2) |
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.attr("x",0 - (height / 2)) |
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.attr("dy", "1em") |
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.style("font-size","12px") |
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.style("text-anchor", "middle") |
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.text("Price"); |
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var gX = svg.append("g") |
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.attr("class", "axis axis--x") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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var gY = svg.append("g") |
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.attr("class", "axis axis--y") |
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.call(yAxis); |
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svg.append("g") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x).ticks(0)); |
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svg.append("g") |
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.call(d3.axisLeft(y).ticks(0)); |
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var chartBody = svg.append("g") |
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.attr("class","chartbody") |
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.attr("clip-path", "url(#clip)"); |
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for (var key in sites) { |
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if (sites.hasOwnProperty(key)){ |
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console.log("key:", key, [sites[key]]); |
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var priceSeries = d3.line() |
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.x(function(d) { return x(d.dt);}) |
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.y(function(d) { return y(d.price);}); |
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chartBody.append("path") |
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.data([sites[key]]) |
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.attr("class","line") |
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.attr("id",key) |
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.attr("d", priceSeries) |
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.style("stroke", z(key)); |
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} |
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} |
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svg.append("defs").append("clipPath") |
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.attr("id", "clip") |
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.append("rect") |
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.attr("width", width) |
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.attr("height", height); |
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var focus = svg.append("g") |
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.attr("transform", "translate(-100,-100)"); |
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focus.append("circle") |
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.attr("class", "y") |
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.style("stroke", "steelblue") |
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.attr("r", 4) |
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.attr("clip-path", "url(#clip)"); |
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focus.append("text") |
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.attr("dy", ".35em") |
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.attr("clip-path", "url(#clip)"); |
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var voronoiGroup = svg.append("g") |
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.attr("class", "voronoiParent") |
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.append("g") |
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.attr("class", "voronoi") |
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.attr("clip-path","url(#clip)"); |
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voronoiGroup.selectAll("path") |
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.data(voronoi.polygons(data)) |
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.enter() |
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.append("path") |
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.attr("d", function(d) { return d ? "M" + d.join("L") + "Z" : null; }) |
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.on("mouseover", mouseover) |
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.on("mouseout", mouseout); |
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d3.select(".voronoiParent").call(zoom); |
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d3.select("button").on("click", resetted); |
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d3.select("#show-voronoi") |
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.property("disabled", false) |
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.on("change", function() { voronoiGroup.classed("voronoi--show", this.checked); }); |
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function mouseover(d) { |
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var transform = d3.zoomTransform(d3.select(".voronoiParent")._groups[0][0]); |
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console.log(transform); |
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var xt = transform.rescaleX(x), yt = transform.rescaleY(y); |
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d3.select("#"+d.data.site).classed("site--hover", true); |
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focus.select("circle.y") |
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.attr('cx', function() { |
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return transform.applyX(x(d.data.dt)); |
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}) |
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.attr('cy', function() { |
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return transform.applyY(y(d.data.price)); |
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}) |
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.attr("transform", "translate(100,100)") |
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} |
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function mouseout(d) { |
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d3.select("#"+d.data.site).classed("site--hover", false); |
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focus.select("circle.y").attr("transform", "translate(-10000,-10000)"); |
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} |
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function mouseDate(scale) { |
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var g = d3.select("#group")._groups[0][0] |
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var x0 = scale.invert(d3.mouse(g)[0]) |
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i = bisectDate(data, x0, 1) |
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d0 = data[i - 1]; |
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if (d0.dt === date_max) { |
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d = d0; |
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} |
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else { |
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var d1 = data[i] |
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d = x0 - d0.dt > d1.dt- x0 ? d1 : d0; |
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} |
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return d; |
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} |
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function zoomed() { |
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gX.call(xAxis.scale(d3.event.transform.rescaleX(x))); |
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gY.call(yAxis.scale(d3.event.transform.rescaleY(y))); |
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var t = d3.event.transform, |
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xt = t.rescaleX(x), |
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yt = t.rescaleY(y) |
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x_date = mouseDate(xt); |
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var priceSeries2 = d3.line() |
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.defined(function(d) { return d.price != 0; }) |
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.x(function(d) { return xt(d.dt); }) |
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.y(function(d) { return yt(d.price); }); |
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var voronoi2 = d3.voronoi() |
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.x(function(d) { return xt(d.dt); }) |
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.y(function(d) { return yt(d.price); }) |
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.extent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]); |
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chartBody.selectAll("path") |
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.attr("d", priceSeries2); |
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focus.select("circle.y") |
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.attr('cx', function() {return t.applyX(x(x_date.dt)); }) |
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.attr('cy', function() {return t.applyY(y(x_date.price)); }); |
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voronoiGroup |
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.attr("transform", d3.event.transform) |
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} |
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function resetted() { |
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d3.select(".voronoiParent").transition() |
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.duration(750) |
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.call(zoom.transform, d3.zoomIdentity); |
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} |
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}); |
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</script> |
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</body> |