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December 13, 2015 20:48
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click a d3 polygon, test
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| rect { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| .feature { | |
| fill: #ccc; | |
| opacity: .5; | |
| cursor: pointer; | |
| } | |
| .feature.active { | |
| fill: orange; | |
| } | |
| .mesh { | |
| fill: none; | |
| stroke: black; | |
| stroke-width: .3px; | |
| stroke-linejoin: bevel; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v0.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| active; | |
| var projection = d3.geo.mercator() | |
| .scale(180000) | |
| .center([-119.5, 35]) | |
| .translate([width / 2, height / 2]); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("rect") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("click", reset); | |
| var g = svg.append("g"); | |
| d3.json("h2o.json", function(error, h2o) { | |
| g.selectAll("path") | |
| .data(topojson.object(h2o, h2o.objects.hu12).geometries) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .attr("class", "feature") | |
| .on("click", click); | |
| g.append("path") | |
| .datum(topojson.mesh(h2o, h2o.objects.hu12, function(a, b) { return a !== b; })) | |
| .attr("class", "mesh") | |
| .attr("d", path); | |
| }); | |
| function click(d) { | |
| if (active === d) return reset(); | |
| g.selectAll(".active").classed("active", false); | |
| d3.select(this).classed("active", active = d); | |
| var b = path.bounds(d); | |
| g.transition().duration(750).attr("transform", | |
| "translate(" + projection.translate() + ")" | |
| + "scale(" + .95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height) + ")" | |
| + "translate(" + -(b[1][0] + b[0][0]) / 2 + "," + -(b[1][1] + b[0][1]) / 2 + ")"); | |
| } | |
| function reset() { | |
| g.selectAll(".active").classed("active", active = false); | |
| g.transition().duration(750).attr("transform", ""); | |
| } | |
| </script> |
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