Skip to content

Instantly share code, notes, and snippets.

@johan
Created November 24, 2011 23:09
Show Gist options
  • Save johan/1392488 to your computer and use it in GitHub Desktop.
Save johan/1392488 to your computer and use it in GitHub Desktop.
Draggable Spinny Globe from Mike Bostock's SVG Open 2011 keynote
// http://www.html5rocks.com/en/tutorials/file/dndfiles/
d3.select('svg')
.on('dragover', handleDragOver)
.on('drop', handleFileSelect)
;
function handleFileSelect() {
var event = d3.event
, files = event.dataTransfer.files // FileList object
, about = []
, shape = null;
event.stopPropagation();
event.preventDefault();
for (var i = 0, file; file = files[i]; i++) {
// f.name, f.size, f.type (doesn't grok "json"), f.lastModifiedDate
readGeojson(file, draw);
}
}
function readGeojson(file, cb) {
var reader = new FileReader;
reader.onload = function(e) {
cb(e.target.result, file);
};
reader.readAsText(file);
}
function handleDragOver() {
var ev = d3.event;
ev.stopPropagation();
ev.preventDefault();
ev.dataTransfer.dropEffect = 'copy'; // Explicitly show this is a copy.
}
function draw(content, file) {
var json = JSON.parse(content)
, what = json.features;
feature.data(countries = countries.features.concat(what))
.enter().append('svg:path')
.classed('new', true)
.attr('id', function(d) { return d.id; })
.attr('d', clip);
feature = svg.selectAll('path');
refresh();
}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>d3.js Spinny Globe from Mike Bostock's SVG Open 2011 keynote</title>
<script src="http://mbostock.github.com/d3/d3.js"></script>
<script src="http://mbostock.github.com/d3/d3.geo.js"></script>
<link type="text/css" rel="stylesheet" href="http://mbostock.github.com/d3/talk/20111018/style.css"/>
<link type="text/css" rel="stylesheet" href="http://mbostock.github.com/d3/talk/20111018/colorbrewer/colorbrewer.css"/>
<style type="text/css">
svg {
width: 800px;
height: 800px;
pointer-events: all;
}
circle {
fill: #dbe4f0;
}
path {
fill: #aaa;
stroke: #fff;
}
#header {
top: 7px;
left: 685px;
text-align: right;
width: auto;
}
#header div {
font-size: 12px;
}
.tip { color: #999; }
</style>
</head>
<body>
<div id="body">
<div id="header">
d3.geo.azimuthal
<div><label for="proj">Projection: </label><select id="proj">
<option value="equalarea">equalarea</option>
<option value="equidistant">equidistant</option>
<option value="gnomonic">gnomonic</option>
<option value="orthographic" selected>orthographic</option>
<option value="stereographic">stereographic</option>
</select></div>
<div class="tip">drag to rotate the origin</div>
<div><label for="animate">animate:</label>
<input id="animate" type="checkbox" checked>
</div>
</div>
</div>
<script src="vis.js"></script>
<script src="dnd.js"></script>
</body>
</html>
var feature // eventually: all svg paths (countries) of the world
, countries
, toggle; // animation on/off control
var projection = d3.geo.azimuthal()
.scale(380)
.origin([-71.03,42.37])
.mode("orthographic")
.translate([400, 400]);
var circle = d3.geo.greatCircle()
.origin(projection.origin());
// TODO fix d3.geo.azimuthal to be consistent with scale
var scale =
{ orthographic: 380
, stereographic: 380
, gnomonic: 380
, equidistant: 380 / Math.PI * 2
, equalarea: 380 / Math.SQRT2
};
var path = d3.geo.path()
.projection(projection);
var svg = d3.select("#body").append("svg:svg")
.attr("width", 800)
.attr("height", 800)
.on("mousedown", mousedown);
if (frameElement) frameElement.style.height = '800px';
d3.json("world-countries.json", function(collection) {
countries = collection;
feature = svg.selectAll("path")
.data(collection.features)
.enter().append("svg:path")
.attr('id', function(d) { return d.id; })
.attr("d", clip);
feature.append("svg:title")
.text(function(d) { return d.properties.name; });
startAnimation();
d3.select('#animate').on('click', function () {
if (done) startAnimation(); else stopAnimation();
});
});
function stopAnimation() {
done = true;
d3.select('#animate').node().checked = false;
}
function startAnimation() {
done = false;
d3.timer(function() {
var origin = projection.origin();
origin = [origin[0] + .18, origin[1] + .06];
projection.origin(origin);
circle.origin(origin);
refresh();
return done;
});
}
function animationState() {
return 'animation: '+ (done ? 'off' : 'on');
}
d3.select(window)
.on("mousemove", mousemove)
.on("mouseup", mouseup);
d3.select("select").on("change", function() {
stopAnimation();
projection.mode(this.value).scale(scale[this.value]);
refresh(750);
});
var m0
, o0
, done
;
function mousedown() {
stopAnimation();
m0 = [d3.event.pageX, d3.event.pageY];
o0 = projection.origin();
d3.event.preventDefault();
}
function mousemove() {
if (m0) {
var m1 = [d3.event.pageX, d3.event.pageY]
, o1 = [o0[0] + (m0[0] - m1[0]) / 8, o0[1] + (m1[1] - m0[1]) / 8];
projection.origin(o1);
circle.origin(o1);
refresh();
}
}
function mouseup() {
if (m0) {
mousemove();
m0 = null;
}
}
function refresh(duration) {
(duration ? feature.transition().duration(duration) : feature).attr("d", clip);
}
function clip(d) {
return path(circle.clip(d));
}
function reframe(css) {
for (var name in css)
frameElement.style[name] = css[name] + 'px';
}
Display the source blob
Display the rendered blob
Raw
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment