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d3 axis magnifier: date/time scale
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| <!DOCTYPE html> | |
| <html lang="en-GB"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width,user-scalable=no"> | |
| <title>d3 axis magnifier: date/time scale</title> | |
| <script src="https://unpkg.com/d3/build/d3.min.js"></script> | |
| <style media="screen"> | |
| #main{ | |
| max-width: 600px; | |
| margin: 0 auto; | |
| } | |
| text{ | |
| font-size: 12px; | |
| fill: #43423e; | |
| font-family: sans-serif; | |
| pointer-events: none; | |
| } | |
| .hoverDetector{ | |
| fill: transparent; | |
| cursor: pointer; | |
| } | |
| path.domain{ | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .tick line{ | |
| shape-rendering: crispEdges; | |
| } | |
| .point{ | |
| fill-opacity:0.5; | |
| pointer-events: none; | |
| } | |
| .label{ | |
| opacity: 0; | |
| pointer-events: none; | |
| } | |
| .label.show{ | |
| opacity: 1; | |
| } | |
| .focusRect{ | |
| fill: none; | |
| stroke: #cec6b9; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id=main></div> | |
| <script type="text/javascript"> | |
| function nth(d) { | |
| if(d>3 && d<21) return 'th'; | |
| switch (d % 10) { | |
| case 1: return "st"; | |
| case 2: return "nd"; | |
| case 3: return "rd"; | |
| default: return "th"; | |
| } | |
| } | |
| var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; | |
| function dateMaths(origin, days){ | |
| var output = new Date(origin.valueOf()); | |
| return new Date(output.setDate(output.getDate() + days)) | |
| } | |
| var data = d3.range(0,101,1); | |
| data.forEach(function(d,i){ | |
| data[i] = dateMaths(new Date, -Math.floor(Math.random()*2465)); | |
| }); | |
| var main = d3.select("#main"); | |
| var bounds = main.node().getBoundingClientRect(), | |
| width = bounds.width, | |
| height = width*0.67, | |
| margin = {left:65, top:20, right:0, bottom:20}, | |
| startDate = new Date(2010, 0, 1), | |
| endDate = new Date(), | |
| parseDate = d3.timeFormat("%Y-%m-%d").parse; | |
| var graphic = main.append("svg") | |
| .attr("id","graphic") | |
| .attr("width",width + "px") | |
| .attr("height",height + "px") | |
| .style("width",width + "px") | |
| .style("height",height + "px"); | |
| var yScale = d3.scaleTime() | |
| .range([height-margin.bottom, margin.top]) | |
| .domain([startDate, endDate]); | |
| var yScaleOriginal = yScale.copy(); | |
| var yAx = d3.axisLeft(yScale) | |
| .ticks(60) | |
| .tickFormat(function(d){ | |
| return d.getMonth() == 0 ? d.getFullYear():''; | |
| }); | |
| function zoomScale(focus){ | |
| if(focus == "clear"){ | |
| yScale = yScaleOriginal.copy(); | |
| yAx = d3.axisLeft(yScale) | |
| .ticks(60) | |
| .tickFormat(function(d){ | |
| return d.getMonth() == 0 ? d.getFullYear():''; | |
| }); | |
| yAxis | |
| .transition() | |
| .duration(100) | |
| .call(yAx); | |
| points | |
| .transition() | |
| .duration(100) | |
| .attr("cy", function(d){return yScale(d)}); | |
| labels | |
| .classed("show", false) | |
| .transition() | |
| .duration(100) | |
| .attr("y", function(d){return yScale(d)+5}); | |
| focusRect | |
| .transition() | |
| .duration(100) | |
| .attr("height", 0); | |
| }else{ | |
| var topAnchor = d3.max([margin.top, focus-50]), | |
| bottomAnchor = d3.min([height-margin.bottom, focus+50]), | |
| topPoint = d3.min([endDate, dateMaths(yScaleOriginal.invert(focus),15)]), | |
| bottomPoint = d3.max([startDate, dateMaths(topPoint, -30)]); | |
| // var newTicks = d3.range(0, (bottomPoint-5), 10).concat(d3.range(bottomPoint, (topPoint+0.5), 0.5)).concat(d3.range((Math.ceil(topPoint/10)*10), 101, 10)); | |
| yScale | |
| .range([height-margin.bottom, bottomAnchor, topAnchor, margin.top]) | |
| .domain([startDate, bottomPoint, topPoint, endDate]); | |
| yAx | |
| .ticks(60) | |
| .tickFormat(function(d){ | |
| if(d >= bottomPoint && d <= topPoint){ | |
| return d.getMonth() >= 0 ? months[d.getMonth()] + " " + d.getFullYear():months[d.getMonth()]; | |
| }else{ | |
| return d.getMonth() == 0 ? d.getFullYear():''; | |
| } | |
| }); | |
| yAxis | |
| .transition() | |
| .duration(100) | |
| .call(yAx); | |
| points | |
| .transition() | |
| .duration(100) | |
| .attr("cy", function(d){return yScale(d)}); | |
| labels | |
| .classed("show", function(d){return d >= bottomPoint && d <= topPoint}) | |
| .transition() | |
| .duration(100) | |
| .attr("y", function(d){return yScale(d)+5}); | |
| focusRect | |
| .attr("y", topAnchor) | |
| .attr("height", (bottomAnchor-topAnchor)); | |
| } | |
| } | |
| var yAxis = graphic.append("g") | |
| .attr("class", "y axis") | |
| .attr("transform", "translate(" + margin.left + "," + 0 + ")") | |
| .call(yAx); | |
| var yAxisHoverDetector = graphic.append("rect") | |
| .attr("class", "hoverDetector") | |
| .attr("x", 0) | |
| .attr("width", margin.left+30) | |
| .attr("y", margin.top-5) | |
| .attr("height", (height-margin.bottom)-margin.top+10) | |
| .on("mousemove", function(){ | |
| zoomScale(d3.mouse(yAxis.node())[1]); | |
| }) | |
| .on("mouseleave", function(){ | |
| zoomScale("clear"); | |
| }); | |
| var focusRect = graphic.append("rect") | |
| .attr("class", "focusRect") | |
| .attr("x", 0) | |
| .attr("width", margin.left+50) | |
| .attr("y", 0) | |
| .attr("height", 0); | |
| var points = graphic.selectAll("circle.point") | |
| .data(data) | |
| .enter() | |
| .append("circle") | |
| .attr("class", "point") | |
| .attr("cx", 80) | |
| .attr("cy", function(d){return yScale(d)}) | |
| .attr("r", 7) | |
| .style("fill", function(d){return d3.hsl(Math.random()*50, Math.random()+0.5, 0.5)}); | |
| var labels = graphic.selectAll("text.label") | |
| .data(data) | |
| .enter() | |
| .append("text") | |
| .attr("class", "label") | |
| .attr("x", 90) | |
| .attr("y", function(d){return yScale(d)+5}) | |
| .html(function(d){return d.getDate() + nth(d.getDate()) + " of " + months[d.getMonth()]}); | |
| </script> | |
| </body> | |
| </html> |
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