| author | Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr> |
| Fri, 18 Apr 2014 14:31:58 +0200 | |
| changeset 51 | 79833eaa394a |
| parent 47 | c0b4a8b5a012 |
| permissions | -rw-r--r-- |
|
47
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1 |
<!DOCTYPE html> |
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2 |
<html> |
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3 |
<head> |
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4 |
<title>Donut Chart</title> |
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5 |
<script type="text/javascript" src="../../d3.js"></script> |
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6 |
<script type="text/javascript" src="../../d3.layout.js"></script> |
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7 |
<style type="text/css"> |
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8 |
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9 |
body { |
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10 |
font: 10px sans-serif; |
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11 |
} |
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12 |
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13 |
</style> |
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14 |
</head> |
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15 |
<body> |
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16 |
<script type="text/javascript"> |
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17 |
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18 |
var w = 400, |
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19 |
h = 400, |
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20 |
r1 = Math.min(w, h) / 2, |
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21 |
r0 = r1 * .6, |
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22 |
n = 10, |
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23 |
q = 0, |
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24 |
data0 = d3.range(n).map(Math.random), |
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data1 = d3.range(n).map(Math.random), |
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26 |
data, |
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27 |
color = d3.scale.category20(), |
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arc = d3.svg.arc(), |
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donut = d3.layout.pie().sort(null); |
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30 |
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31 |
var vis = d3.select("body") |
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32 |
.append("svg:svg") |
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33 |
.attr("width", w) |
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34 |
.attr("height", h); |
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35 |
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36 |
vis.selectAll("g.arc") |
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37 |
.data(arcs(data0, data1)) |
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38 |
.enter().append("svg:g") |
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39 |
.attr("class", "arc") |
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40 |
.attr("transform", "translate(" + r1 + "," + r1 + ")") |
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41 |
.append("svg:path") |
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42 |
.attr("fill", function(d, i) { return color(i); }) |
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43 |
.attr("d", arc); |
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44 |
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45 |
window.addEventListener("keypress", swap, false); |
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46 |
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47 |
function arcs(data0, data1) { |
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48 |
var arcs0 = donut(data0), |
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arcs1 = donut(data1), |
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50 |
i = -1, |
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51 |
arc; |
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52 |
while (++i < n) { |
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arc = arcs0[i]; |
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arc.innerRadius = r0; |
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arc.outerRadius = r1; |
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arc.next = arcs1[i]; |
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57 |
} |
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return arcs0; |
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59 |
} |
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60 |
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61 |
function swap() { |
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62 |
d3.selectAll("g.arc > path") |
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63 |
.data(++q & 1 ? arcs(data0, data1) : arcs(data1, data0)) |
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64 |
.each(transitionSplit); |
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65 |
} |
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66 |
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67 |
// 1. Wedges split into two rings. |
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68 |
function transitionSplit(d, i) { |
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69 |
d3.select(this) |
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.transition().duration(1000) |
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71 |
.attrTween("d", tweenArc({ |
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72 |
innerRadius: i & 1 ? r0 : (r0 + r1) / 2, |
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73 |
outerRadius: i & 1 ? (r0 + r1) / 2 : r1 |
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74 |
})) |
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75 |
.each("end", transitionRotate); |
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76 |
} |
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77 |
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78 |
// 2. Wedges translate to be centered on their final position. |
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79 |
function transitionRotate(d, i) { |
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80 |
var a0 = d.next.startAngle + d.next.endAngle, |
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81 |
a1 = d.startAngle - d.endAngle; |
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82 |
d3.select(this) |
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83 |
.transition().duration(1000) |
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84 |
.attrTween("d", tweenArc({ |
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85 |
startAngle: (a0 + a1) / 2, |
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86 |
endAngle: (a0 - a1) / 2 |
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87 |
})) |
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88 |
.each("end", transitionResize); |
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89 |
} |
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90 |
|
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91 |
// 3. Wedges then update their values, changing size. |
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92 |
function transitionResize(d, i) { |
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93 |
d3.select(this) |
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94 |
.transition().duration(1000) |
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95 |
.attrTween("d", tweenArc({ |
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96 |
startAngle: d.next.startAngle, |
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97 |
endAngle: d.next.endAngle |
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98 |
})) |
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99 |
.each("end", transitionUnite); |
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100 |
} |
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101 |
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102 |
// 4. Wedges reunite into a single ring. |
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103 |
function transitionUnite(d, i) { |
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104 |
d3.select(this) |
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105 |
.transition().duration(1000) |
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106 |
.attrTween("d", tweenArc({ |
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107 |
innerRadius: r0, |
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108 |
outerRadius: r1 |
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109 |
})); |
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110 |
} |
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111 |
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112 |
function tweenArc(b) { |
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113 |
return function(a) { |
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114 |
var i = d3.interpolate(a, b); |
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115 |
for (var key in b) a[key] = b[key]; // update data |
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116 |
return function(t) { |
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117 |
return arc(i(t)); |
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118 |
}; |
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119 |
}; |
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120 |
} |
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121 |
|
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122 |
</script> |
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123 |
</body> |
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124 |
</html> |