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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <script src="http://d3js.org/d3.v2.min.js?2.9.6"></script> | |
| <style> | |
| .background { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| #states { | |
| fill: #aaa; | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| } | |
| #states .active { | |
| fill: steelblue; | |
| } | |
| </style> | |
| <body> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| centered; | |
| var projection = d3.geo.albersUsa() | |
| .scale(width) | |
| .translate([0, 0]); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("rect") | |
| .attr("class", "background") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("click", click); | |
| var g = svg.append("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")") | |
| .append("g") | |
| .attr("id", "states"); | |
| d3.json("readme.json", function(json) { | |
| g.selectAll("path") | |
| .data(json.features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .on("mouseover", click); | |
| }); | |
| function click(d) { | |
| var x = 0, | |
| y = 0, | |
| k = 1; | |
| alert(d.properties.unemployment) | |
| if (d && centered !== d) { | |
| var centroid = path.centroid(d); | |
| x = -centroid[0]; | |
| y = -centroid[1]; | |
| k = 4; | |
| centered = d; | |
| } else { | |
| centered = null; | |
| } | |
| g.selectAll("path") | |
| .classed("active", centered && function(d) { return d === centered; }); | |
| g.transition() | |
| .duration(1000) | |
| .attr("transform", "scale(" + k + ")translate(" + x + "," + y + ")") | |
| .style("stroke-width", 1.5 / k + "px"); | |
| } | |
| </script> |
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