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July 16, 2018 19:24
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Canvas+SVG hover stroke effect
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| border: none | |
| height: 600 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title></title> | |
| <style> | |
| path { | |
| stroke-linecap: round; | |
| stroke-linejoin: round; | |
| } | |
| .municipalities { | |
| visibility: hidden; | |
| stroke: black; | |
| stroke-width:2; | |
| fill:none; | |
| pointer-events: all; | |
| } | |
| .municipalities.active { | |
| visibility: visible; | |
| } | |
| svg, | |
| canvas { | |
| position: absolute; | |
| top: 0; | |
| left: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <!DOCTYPE html> | |
| <canvas width="960" height="600"></canvas> | |
| <svg width="960" height="600"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/topojson.v2.min.js"></script> | |
| <script src="https://unpkg.com/d3-composite-projections@1.0.2"></script> | |
| <script> | |
| var context = d3.select("canvas").node().getContext("2d"), | |
| svg = d3.select("svg"), | |
| width = 960, | |
| height = 600, | |
| path = d3.geoPath(), | |
| canvasPath = d3.geoPath().context(context); | |
| d3.queue() | |
| .defer(d3.json, 'https://gist.githubusercontent.com/LuisSevillano/acce972dd718af898b2c2875bc4e4167/raw/8813c93f7b66366e6bd2f9b1937be0cac24ff59b/municipalities.json') | |
| .defer(d3.csv, 'https://gist.githubusercontent.com/LuisSevillano/acce972dd718af898b2c2875bc4e4167/raw/8813c93f7b66366e6bd2f9b1937be0cac24ff59b/municipalities_population.csv') | |
| .await(function(error, es, population) { | |
| // loop through the csv to create a new object accesible by ids | |
| var data = []; | |
| population.forEach(function(d){ | |
| data[d.id] = {"id":d.id,"rate":+d.rate}; | |
| }); | |
| color = d3.scaleThreshold() | |
| .range(['#d0e4f1','#c0d6e9','#afc7e1','#9fb8da','#8eaad2','#7d9ccb','#6c90c3','#5982bc','#4575b4']) | |
| .domain([5, 9, 19, 49, 74, 124, 249, 499, 1000]); | |
| features = topojson.feature(es, es.objects.municipalities).features; | |
| for (var i = 0; i < features.length; i++) { | |
| if (data[features[i].id]) { | |
| context.fillStyle = color(data[features[i].id].rate); | |
| context.beginPath() | |
| canvasPath(features[i]) | |
| context.fill() | |
| } | |
| } | |
| svg.selectAll(".municipalities") | |
| .data(features) | |
| .enter() | |
| .append("path") | |
| .attr('d', path) | |
| .attr('class', 'municipalities') | |
| .on("mouseover", function(d){ | |
| d3.select(this).classed('active', true) | |
| }) | |
| .on("mouseout", function(d){ | |
| d3.select(this).classed('active', false) | |
| }); | |
| // border | |
| context.beginPath() | |
| canvasPath(topojson.feature(es, es.objects.nation)) | |
| context.strokeStyle = "rgb(100, 100, 100)"; | |
| context.stroke() | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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