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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="jquery.min.js"></script>
<style>
#map {
background-color: #fff;
border: 1px solid #ccc;
}
.background {
fill: none;
pointer-events: all;
}
#countries, #states {
fill: #cde;
stroke: #fff;
stroke-linejoin: round;
stroke-linecap: round;
}
#countries .active, #states .active {
fill: #89a;
}
#cities {
stroke-width: 0;
}
.city {
fill: #345;
stroke: #fff;
}
pre.prettyprint {
border: 1px solid #ccc;
margin-bottom: 0;
padding: 9.5px;
}
.countryText {
}
.state-Text {
}
</style>
</head>
<body>
<div id="map"></div>
<script src="d3.min.js"></script>
<script src="topojson.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
var m_width = $("#map").width(),
width = 938,
height = 500,
country,
state;
var projection = d3.geo.mercator()
.scale(150)
.translate([width / 2, height / 1.5]);
var path = d3.geo.path()
.projection(projection);
var svg = d3.select("#map").append("svg")
.attr("preserveAspectRatio", "xMidYMid")
.attr("viewBox", "0 0 " + width + " " + height)
.attr("width", m_width)
.attr("height", m_width * height / width);
svg.append("rect")
.attr("class", "background")
.attr("width", width)
.attr("height", height)
.on("click", country_clicked);
var g = svg.append("g");
d3.json("countries.topo.json", function (error, us) {
g.append("g")
.attr("id", "countries")
.selectAll("path")
.data(topojson.feature(us, us.objects.countries).features)
.enter()
.append("path")
.attr("id", function (d) {
return d.id;
})
.attr("d", path)
.on("click", country_clicked);
g.selectAll("text")
.data(topojson.feature(us, us.objects.countries).features)
.enter()
.append("svg:text")
.attr("class", "country-label")
.text(function (d) {
return d.properties.name;
})
.attr("x", function (d) {
return path.centroid(d)[0];
})
.attr("y", function (d) {
return path.centroid(d)[1];
})
.attr("text-anchor", "middle")
.attr('font-size', '4pt');
//http://stackoverflow.com/questions/17425268/d3js-automatic-labels-placement-to-avoid-overlaps-force-repulsion
arrangeLabels();
});
//http://stackoverflow.com/questions/17425268/d3js-automatic-labels-placement-to-avoid-overlaps-force-repulsion
function arrangeLabels() {
var move = 1;
while (move > 0) {
move = 0;
svg.selectAll("text")
.each(function () {
var that = this,
a = this.getBoundingClientRect();
svg.selectAll("text")
.each(function () {
if (this != that) {
var b = this.getBoundingClientRect();
if ((Math.abs(a.left - b.left) * 2 < (a.width + b.width)) &&
(Math.abs(a.top - b.top) * 2 < (a.height + b.height))) {
// overlap, move labels
var dx = (Math.max(0, a.right - b.left) +
Math.min(0, a.left - b.right)) * 0.01,
dy = (Math.max(0, a.bottom - b.top) +
Math.min(0, a.top - b.bottom)) * 0.02,
tt = d3.transform(d3.select(this).attr("transform")),
to = d3.transform(d3.select(that).attr("transform"));
move += Math.abs(dx) + Math.abs(dy);
to.translate = [ to.translate[0] + dx, to.translate[1] + dy ];
tt.translate = [ tt.translate[0] - dx, tt.translate[1] - dy ];
d3.select(this).attr("transform", "translate(" + tt.translate + ")");
d3.select(that).attr("transform", "translate(" + to.translate + ")");
a = this.getBoundingClientRect();
}
}
});
});
}
}
function zoom(xyz) {
g.transition()
.duration(750)
.attr("transform", "translate(" + projection.translate() + ")scale(" + xyz[2] + ")translate(-" + xyz[0] + ",-" + xyz[1] + ")")
.selectAll(["#countries", "#states", "#cities"])
.style("stroke-width", 1.0 / xyz[2] + "px")
.selectAll(".city")
.attr("d", path.pointRadius(20.0 / xyz[2]));
}
function get_xyz(d) {
var bounds = path.bounds(d);
var w_scale = (bounds[1][0] - bounds[0][0]) / width;
var h_scale = (bounds[1][1] - bounds[0][1]) / height;
var z = .96 / Math.max(w_scale, h_scale);
var x = (bounds[1][0] + bounds[0][0]) / 2;
var y = (bounds[1][1] + bounds[0][1]) / 2 + (height / z / 6);
return [x, y, z];
}
function country_clicked(d) {
g.selectAll(["#states", "#cities"]).remove();
state = null;
if (country) {
g.selectAll("#" + country.id).style('display', null);
d3.selectAll(".state-label").style('visibility', 'hidden');
d3.selectAll(".country-label").style('visibility', 'visible');
}
if (d && country !== d) {
var xyz = get_xyz(d);
country = d;
if (d.id == 'USA' || d.id == 'JPN') {
d3.json("states_" + d.id.toLowerCase() + ".topo.json", function (error, us) {
g.append("g")
.attr("id", "states")
.selectAll("path")
.data(topojson.feature(us, us.objects.states).features)
.enter()
.append("path")
.attr("id", function (d) {
return d.id;
})
.attr("class", "active")
.attr("d", path)
.on("click", state_clicked);
d3.selectAll(".country-label").style('visibility', 'hidden');
d3.selectAll(".state-label").style('visibility', 'visible');
g.append("g")
.attr("class", "state-labels")
.selectAll("text:not(.country-label)")
.data(topojson.feature(us, us.objects.states).features)
.enter()
.append("svg:text")
.attr("class", "state-label")
.text(function (d) {
console.log(d.properties.name);
return d.properties.name;
})
.attr("x", function (d) {
return path.centroid(d)[0];
})
.attr("y", function (d) {
return path.centroid(d)[1];
})
.attr("text-anchor", "middle")
.attr('font-size', '2pt');
//http://stackoverflow.com/questions/17425268/d3js-automatic-labels-placement-to-avoid-overlaps-force-repulsion
arrangeLabels();
zoom(xyz);
g.selectAll("#" + d.id).style('display', 'none');
});
} else {
zoom(xyz);
}
} else {
var xyz = [width / 2, height / 1.5, 1];
country = null;
zoom(xyz);
}
}
function state_clicked(d) {
g.selectAll("#cities").remove();
if (d && state !== d) {
var xyz = get_xyz(d);
state = d;
country_code = state.id.substring(0, 3).toLowerCase();
state_name = state.properties.name;
d3.json("cities_" + country_code + ".topo.json", function (error, us) {
g.append("g")
.attr("id", "cities")
.selectAll("path")
.data(topojson.feature(us, us.objects.cities).features.filter(function (d) {
return state_name == d.properties.state;
}))
.enter()
.append("path")
.attr("id", function (d) {
return d.properties.name;
})
.attr("class", "city")
.attr("d", path.pointRadius(20 / xyz[2]));
zoom(xyz);
});
} else {
state = null;
country_clicked(country);
}
}
$(window).resize(function () {
var w = $("#map").width();
svg.attr("width", w);
svg.attr("height", w * height / width);
});
</script>
</body>
</html>