forked from LuisSevillano's block: Canvas+SVG hover stroke effect
Created
September 14, 2017 17:03
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Canvas+SVG hover stroke effect
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| border: none | |
| height: 600 |
This file contains hidden or 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/[email protected]"></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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