Simple mouse interaction with d3.js
forked from mbostock's block: U.S. Counties TopoJSON
forked from enjalot's block: WWSD #5: d3 + TopoJSON
forked from enjalot's block: WWSD #7: d3 mouse interaction
Last active
April 25, 2021 12:09
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d3 loading GeoJSON + mouse interaction
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| path { | |
| fill: #ccc; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| } | |
| circle { | |
| fill: #fff; | |
| fill-opacity: 0.4; | |
| stroke: #111; | |
| } | |
| path.active { | |
| fill: pink; | |
| } | |
| circle.active { | |
| fill: blue; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v4.min.js"></script> | |
| <script src="//d3js.org/d3.geo.projection.v2.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geoMercator(); | |
| var path = d3.geoPath() | |
| .projection(projection) | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var url = "http://enjalot.github.io/wwsd/data/world/world-110m.geojson"; | |
| var url2 = "http://enjalot.github.io/wwsd/data/world/ne_50m_populated_places_simple.geojson" | |
| d3.json(url, function(error, countries) { | |
| d3.json(url2, function(error, places) { | |
| if (error) console.log(error); | |
| console.log("geojson", countries, places); | |
| svg.selectAll("path") | |
| .data(countries.features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .on("mouseover",function(d) { | |
| console.log("just had a mouseover", d3.select(d)); | |
| d3.select(this) | |
| .classed("active",true) | |
| }) | |
| .on("mouseout",function(d){ | |
| d3.select(this) | |
| .classed("active",false) | |
| }) | |
| svg.selectAll("circle") | |
| .data(places.features) | |
| .enter().append("circle") | |
| .attr('r',5) | |
| .attr('cx',function(d) { return projection(d.geometry.coordinates)[0]}) | |
| .attr('cy',function(d) { return projection(d.geometry.coordinates)[1]}) | |
| .on("mouseover",function(d) { | |
| console.log("just had a mouseover", d3.select(d)); | |
| d3.select(this) | |
| .classed("active",true) | |
| }) | |
| .on("mouseout",function(d){ | |
| d3.select(this) | |
| .classed("active",false) | |
| }) | |
| }) | |
| }); | |
| </script> |
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