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davo/index.html

Forked from mbostock/.block
Created Dec 18, 2012
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Polar Clock</title>
<style>
#clock {
position: relative;
background: #222;
width: 960px;
height: 500px;
}
#clock div {
position: absolute;
right: 4px;
bottom: 4px;
color: #ddd;
font: 10px sans-serif;
}
#clock a {
color: #fff;
font-weight: bold;
}
text {
font: 10px sans-serif;
}
</style>
<div id="clock">
<div>
Inspired by <a href="http://blog.pixelbreaker.com/polarclock/">pixelbreaker</a>.
</div>
</div>
<script src="http://d3js.org/d3.v2.min.js"></script>
<script>
// Based on http://vis.stanford.edu/protovis/ex/clock.html
// Based on http://blog.pixelbreaker.com/polarclock
var w = 960,
h = 500,
r = Math.min(w, h) / 1.8,
s = .09,
fsec = d3.time.format("%S s"),
fmin = d3.time.format("%M m"),
fhou = d3.time.format("%H h"),
fwee = d3.time.format("%a"),
fdat = d3.time.format("%d d"),
fmon = d3.time.format("%b");
var fill = d3.scale.linear()
.range(["hsl(-180, 50%, 50%)", "hsl(180, 50%, 50%)"])
.interpolate(interpolateHsl);
var arc = d3.svg.arc()
.startAngle(0)
.endAngle(function(d) { return d.value * 2 * Math.PI; })
.innerRadius(function(d) { return d.index * r; })
.outerRadius(function(d) { return (d.index + s) * r; });
var svg = d3.select("#clock").append("svg")
.attr("width", w)
.attr("height", h)
.append("g")
.attr("transform", "translate(" + w / 2 + "," + h / 2 + ")");
var g = svg.selectAll("g")
.data(fields)
.enter().append("g");
g.append("path")
.style("fill", function(d) { return fill(d.value); })
.attr("d", arc);
g.append("text")
.attr("text-anchor", "middle")
.attr("dy", "1em")
.text(function(d) { return d.text; });
// Update arcs.
d3.timer(function() {
var g = svg.selectAll("g")
.data(fields);
g.select("path")
.style("fill", function(d) { return fill(d.value); })
.attr("d", arc);
g.select("text")
.attr("dy", function(d) { return d.value < .5 ? "-.5em" : "1em"; })
.attr("transform", function(d) {
return "rotate(" + 360 * d.value + ")"
+ "translate(0," + -(d.index + s / 2) * r + ")"
+ "rotate(" + (d.value < .5 ? -90 : 90) + ")"
})
.text(function(d) { return d.text; });
});
// Generate the fields for the current date/time.
function fields() {
var d = new Date;
function days() {
return 32 - new Date(d.getYear(), d.getMonth(), 32).getDate();
}
var second = (d.getSeconds() + d.getMilliseconds() / 1000) / 60,
minute = (d.getMinutes() + second) / 60,
hour = (d.getHours() + minute) / 24,
weekday = (d.getDay() + hour) / 7,
date = (d.getDate() - 1 + hour) / days(),
month = (d.getMonth() + date) / 12;
return [
{value: second, index: .7, text: fsec(d)},
{value: minute, index: .6, text: fmin(d)},
{value: hour, index: .5, text: fhou(d)},
{value: weekday, index: .3, text: fwee(d)},
{value: date, index: .2, text: fdat(d)},
{value: month, index: .1, text: fmon(d)},
];
}
// To avoid shortest-path interpolation.
function interpolateHsl(a, b) {
var i = d3.interpolateString(a, b);
return function(t) {
return d3.hsl(i(t));
};
}
</script>
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