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@slojo404
Forked from mbostock/.block
Created Mar 26, 2012
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What would you like to do?
mousewheel-zoom + click-to-center
<!DOCTYPE html>
<meta charset="utf-8">
<script src="http://mbostock.github.com/d3/d3.v2.js?2.8.1"></script>
<style>
.background {
fill: none;
pointer-events: all;
}
#states path {
fill: #aaa;
stroke: #fff;
stroke-width: 1.5px;
}
#states path:hover {
stroke: white;
}
</style>
<body>
<script>
var width = 960,
height = 500;
var projection = d3.geo.albersUsa()
.scale(width)
.translate([width / 2, height / 2]);
var path = d3.geo.path()
.projection(projection);
var zoom = d3.behavior.zoom()
.translate(projection.translate())
.scale(projection.scale())
.scaleExtent([height, 8 * height])
.on("zoom", zoom);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var states = svg.append("g")
.attr("id", "states")
.call(zoom);
states.append("rect")
.attr("class", "background")
.attr("width", width)
.attr("height", height);
d3.json("us-states.json", function(json) {
states.selectAll("path")
.data(json.features)
.enter().append("path")
.attr("d", path)
.on("click", click);
});
function click(d) {
var centroid = path.centroid(d),
translate = projection.translate();
projection.translate([
translate[0] - centroid[0] + width / 2,
translate[1] - centroid[1] + height / 2
]);
zoom.translate(projection.translate());
states.selectAll("path").transition()
.duration(1000)
.attr("d", path);
}
function zoom() {
projection.translate(d3.event.translate).scale(d3.event.scale);
states.selectAll("path").attr("d", path);
}
</script>
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