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<!DOCTYPE html> |
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<html> |
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<head> |
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<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script> |
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<style> |
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body { |
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font: 10px sans-serif; |
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} |
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.axis path, |
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.axis line { |
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fill: none; |
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stroke: #000; |
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shape-rendering: crispEdges; |
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} |
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.x.axis path { |
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display: none; |
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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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</style> |
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</head> |
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<body> |
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<script> |
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var margin = { |
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top: 20, |
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right: 80, |
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bottom: 30, |
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left: 50 |
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}, |
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width = 650 - margin.left - margin.right, |
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height = 400 - margin.top - margin.bottom; |
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var parseDate = d3.time.format("%Y%m%d").parse; |
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formatDate = d3.time.format("%Y"); |
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var x = d3.time.scale() |
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.range([0, width]); |
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var y = d3.scale.linear() |
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.range([height, 0]); |
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var color = d3.scale.category10(); |
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var xAxis = d3.svg.axis() |
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.scale(x) |
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.orient("bottom"); |
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var yAxis = d3.svg.axis() |
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.scale(y) |
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.orient("left"); |
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var line = d3.svg.line() |
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.interpolate("basis") |
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.x(function(d) { |
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return x(d.date); |
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}) |
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.y(function(d) { |
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return y(d.temperature); |
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}); |
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var svg = d3.select("body").append("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("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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d3.csv("Belgium (1).csv", function(error, data) { |
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color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; })); |
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data.forEach(function(d) { |
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d.date = parseDate(d.date); |
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}); |
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var cities = color.domain().map(function(name) { |
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return { |
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name: name, |
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values: data.map(function(d) { |
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return { |
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date: d.date, |
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temperature: +d[name] |
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}; |
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}) |
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}; |
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}); |
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x.domain(d3.extent(data, function(d) { |
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return d.date; |
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})); |
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/*x.domain([new Date(2014, 0, 1), new Date(2015, 0, 0)]);*/ |
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y.domain([ |
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d3.min(cities, function(c) { |
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return d3.min(c.values, function(v) { |
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return v.temperature; |
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}); |
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}), |
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d3.max(cities, function(c) { |
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return d3.max(c.values, function(v) { |
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return v.temperature; |
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}); |
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}) |
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]); |
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var legend = svg.selectAll('g') |
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.data(cities) |
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.enter() |
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.append('g') |
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.attr('class', 'legend'); |
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legend.append('rect') |
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.attr('x', width - 240) |
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.attr('y', function(d, i) { |
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return i * 20; |
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}) |
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.attr('width', 10) |
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.attr('height', 10) |
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.style('fill', function(d) { |
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return color(d.name); |
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}); |
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legend.append('text') |
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.attr('x', width - 220) |
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.attr('y', function(d, i) { |
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return (i * 20) + 9; |
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}) |
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.text(function(d) { |
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return d.name; |
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}); |
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svg.append("g") |
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.attr("class", "x axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis) |
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.append("text") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 6) |
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.attr("dy", ".71em") |
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.style("text-anchor", "end") |
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.text("Test Graph (1)"); |
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var city = svg.selectAll(".city") |
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.data(cities) |
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.enter().append("g") |
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.attr("class", "city"); |
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city.append("path") |
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.attr("class", "line") |
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.attr("d", function(d) { |
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return line(d.values); |
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}) |
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.style("stroke", function(d) { |
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return color(d.name); |
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}); |
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city.append("text") |
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.datum(function(d) { |
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return { |
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name: d.name, |
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value: d.values[d.values.length - 1] |
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}; |
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}) |
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.attr("transform", function(d) { |
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return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")"; |
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}) |
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.attr("x", 3) |
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.attr("dy", ".35em") |
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.text(function(d) { |
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return d.name; |
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}); |
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var mouseG = svg.append("g") |
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.attr("class", "mouse-over-effects"); |
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mouseG.append("path") // this is the black vertical line to follow mouse |
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.attr("class", "mouse-line") |
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.style("stroke", "black") |
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.style("stroke-width", "1px") |
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.style("opacity", "0"); |
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var lines = document.getElementsByClassName('line'); |
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var mousePerLine = mouseG.selectAll('.mouse-per-line') |
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.data(cities) |
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.enter() |
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.append("g") |
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.attr("class", "mouse-per-line"); |
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mousePerLine.append("circle") |
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.attr("r", 7) |
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.style("stroke", function(d) { |
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return color(d.name); |
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}) |
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.style("fill", "none") |
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.style("stroke-width", "1px") |
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.style("opacity", "0"); |
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mousePerLine.append("text") |
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.attr("transform", "translate(10,3)"); |
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mouseG.append('svg:rect') // append a rect to catch mouse movements on canvas |
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.attr('width', width) // can't catch mouse events on a g element |
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.attr('height', height) |
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.attr('fill', 'none') |
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.attr('pointer-events', 'all') |
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.on('mouseout', function() { // on mouse out hide line, circles and text |
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d3.select(".mouse-line") |
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.style("opacity", "0"); |
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d3.selectAll(".mouse-per-line circle") |
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.style("opacity", "0"); |
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d3.selectAll(".mouse-per-line text") |
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.style("opacity", "0"); |
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}) |
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.on('mouseover', function() { // on mouse in show line, circles and text |
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d3.select(".mouse-line") |
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.style("opacity", "1"); |
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d3.selectAll(".mouse-per-line circle") |
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.style("opacity", "1"); |
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d3.selectAll(".mouse-per-line text") |
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.style("opacity", "1"); |
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}) |
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.on('mousemove', function() { // mouse moving over canvas |
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var mouse = d3.mouse(this); |
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d3.select(".mouse-line") |
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.attr("d", function() { |
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var d = "M" + mouse[0] + "," + height; |
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d += " " + mouse[0] + "," + 0; |
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return d; |
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}); |
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d3.selectAll(".mouse-per-line") |
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.attr("transform", function(d, i) { |
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console.log(width/mouse[0]) |
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var xDate = x.invert(mouse[0]), |
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bisect = d3.bisector(function(d) { return d.date; }).right; |
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idx = bisect(d.values, xDate); |
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var beginning = 0, |
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end = lines[i].getTotalLength(), |
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target = null; |
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while (true){ |
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target = Math.floor((beginning + end) / 2); |
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pos = lines[i].getPointAtLength(target); |
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if ((target === end || target === beginning) && pos.x !== mouse[0]) { |
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break; |
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} |
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if (pos.x > mouse[0]) end = target; |
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else if (pos.x < mouse[0]) beginning = target; |
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else break; //position found |
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} |
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d3.select(this).select('text') |
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.text(y.invert(pos.y).toFixed(2)); |
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return "translate(" + mouse[0] + "," + pos.y +")"; |
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}); |
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}); |
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}); |
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</script> |
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</body> |
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</html> |
