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@mbostock
Forked from mbostock/.block
Last active Oct 19, 2021
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What would you like to do?
click-to-zoom via transform
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.background {
fill: none;
pointer-events: all;
}
#states {
fill: #aaa;
}
#states .active {
fill: orange;
}
#state-borders {
fill: none;
stroke: #fff;
stroke-width: 1.5px;
stroke-linejoin: round;
stroke-linecap: round;
pointer-events: none;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 500,
centered;
var projection = d3.geo.albersUsa()
.scale(1070)
.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("class", "background")
.attr("width", width)
.attr("height", height)
.on("click", clicked);
var g = svg.append("g");
d3.json("/mbostock/raw/4090846/us.json", function(error, us) {
if (error) throw error;
g.append("g")
.attr("id", "states")
.selectAll("path")
.data(topojson.feature(us, us.objects.states).features)
.enter().append("path")
.attr("d", path)
.on("click", clicked);
g.append("path")
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
.attr("id", "state-borders")
.attr("d", path);
});
function clicked(d) {
var x, y, k;
if (d && centered !== d) {
var centroid = path.centroid(d);
x = centroid[0];
y = centroid[1];
k = 4;
centered = d;
} else {
x = width / 2;
y = height / 2;
k = 1;
centered = null;
}
g.selectAll("path")
.classed("active", centered && function(d) { return d === centered; });
g.transition()
.duration(750)
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")")
.style("stroke-width", 1.5 / k + "px");
}
</script>
@dannycochran
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dannycochran commented Nov 3, 2012

Thanks for this template. Thought I would share this – it might be nice to include hover states for the states as a default in this code.

http://stanford.edu/~c0chran/cgi-bin/v3/index.html

@thedod
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thedod commented Jan 19, 2013

Thanks (both for d3 and for this specific example).
I've forked it into a clickable heat-map of petition signatures: http://bl.ocks.org/4548858

@Jvalal-zz
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Jvalal-zz commented Mar 7, 2013

Hi, I'm new to this and I thought I'd be able to just cut and paste the code from above and have it "work".

what am I missing? http://jasonvalalik.com/OpenLayers-1.0-rc1/examples/Leaflet.html

@bobcardassi
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bobcardassi commented Jun 9, 2013

Hi Guys, how can I use this example for Brazilian map project?

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