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index_proj.html
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index_proj.html
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<!-- Mix of https://bl.ocks.org/mbostock/4699541 and https://bl.ocks.org/mbostock/9656675 -->
<!-- NB: in second example, clicking on New England sends map flying off the screen c.f. -->
<!-- https://gist.github.com/mbostock/9656675 comment -->
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.background {
fill: none;
pointer-events: all;
}
.feature {
fill: #ccc;
cursor: pointer;
}
.feature.active {
fill: orange;
}
.mesh {
fill: none;
stroke: #fff;
stroke-linecap: round;
stroke-linejoin: round;
}
.continent-bd {
fill: none;
stroke: #fff;
stroke-width: .5px;
}
.shelf-bd {
fill: none;
stroke: gray;
}
</style>
<body>
<script src="d3.v3.min.js"></script>
<script src="lib/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 700,
active = d3.select(null);
var projection = d3.geo.mercator()
.translate([width / 2, height / 1.5]);
var path = d3.geo.path().projection(projection);
var t = projection.translate(); // the projection's default translation
var s = projection.scale() // the projection's default scale
var zoom = d3.behavior.zoom()
//.translate([0, 0])
//.scale(1)
//.scaleExtent([1, 8])
.on("zoom", zoomed);
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", reset);
var g = svg.append("g")
.style("stroke-width", "1.5px");
svg
.call(zoom); // delete this line to disable free zooming
//.call(zoom.event);
d3.json("refs/all_nameM_idC.topojson", function(error, us) {
console.log("us: ", us)
console.log("feature: ", us.objects.Continents)
if (error) throw error;
g.selectAll("path")
.data(topojson.feature(us, us.objects.Continents).features)
.enter().append("path")
.attr("d", path)
.attr("class", function (d) {
//console.log("d: ", d.properties.name)
return "feature" + " marcat-" + d.properties.name;
})
.on("click", clicked);
g.append("path")
//.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
.datum(topojson.mesh(us, us.objects.Continents, function(a, b) { return a !== b; }))
.attr("class", "mesh")
.attr("d", path);
});
function clicked(d) {
console.log("this:", this)
console.log("active.node():", active.node())
if (active.node() === this) return reset();
active.classed("active", false);
active = d3.select(this).classed("active", true);
var bounds = path.bounds(d),
dx = bounds[1][0] - bounds[0][0],
dy = bounds[1][1] - bounds[0][1],
x = (bounds[0][0] + bounds[1][0]) / 2,
y = (bounds[0][1] + bounds[1][1]) / 2,
scale = .9 / Math.max(dx / width, dy / height),
translate = [width / 2 - scale * x, height / 2 - scale * y];
g.transition()
.duration(750)
.style("stroke-width", 1.5 / scale + "px")
.attr("transform", "translate(" + translate + ")scale(" + scale + ")");
}
function reset() {
active.classed("active", false);
active = d3.select(null);
g.transition()
.duration(750)
.style("stroke-width", "1.5px")
.attr("transform", "");
}
function zoomed() {
//http://bl.ocks.org/biovisualize/2322933
// d3.event.translate (an array) stores the current translation from the parent SVG element
// t (an array) stores the projection's default translation
// we add the x and y vales in each array to determine the projection's new translation
var tx = t[0] * d3.event.scale + d3.event.translate[0];
var ty = t[1] * d3.event.scale + d3.event.translate[1];
projection.translate([tx, ty]);
// now we determine the projection's new scale, but there's a problem:
// the map doesn't 'zoom onto the mouse point'
projection.scale(s * d3.event.scale);
// redraw the map
svg.selectAll("path").attr("d", path);
}
</script>