forked from cool-Blue's block: dynamic pie chart with proper label orientation
Created
March 22, 2017 14:11
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dynamic pie chart with proper label orientation
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license: mit |
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<title>http://stackoverflow.com/questions/32510101/d3-why-is-enter-selection-not-showing-any-transition-for-a-donut-chart?noredirect=1#comment52896340_32510101</title> | |
<style> | |
.chart text { | |
font: 16px sans-serif; | |
} | |
#pie-chart-div { | |
position: relative; | |
top: 6em; | |
} | |
.chart { | |
position: relative; | |
/* top: 2em;*/ | |
} | |
</style> | |
</head> | |
<body> | |
<svg class="chart"></svg> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script> | |
<script src="https://gitcdn.xyz/repo/cool-Blue/d3-lib/master/transitions/end-all/endAll.js"></script> | |
<script> | |
var crm = (function() { | |
var prevData = []; | |
return function crm(f) { | |
var max = 10000; | |
oldPieData = JSON.parse(JSON.stringify(prevData)); | |
prevData = f([ | |
{name: 'SMR', value: Math.random() * max}, | |
{name: 'PSF', value: Math.random() * max}, | |
{name: 'Insurance', value: Math.random() * max}, | |
{name: 'Other', value: Math.random() * max} | |
]) | |
} | |
})(); | |
pieTween = function(d, i) { | |
var s0; | |
var e0; | |
if(oldPieData[i]){ | |
s0 = oldPieData[i].startAngle; | |
e0 = oldPieData[i].endAngle; | |
} else if (!(oldPieData[i]) && oldPieData[i-1]) { | |
s0 = oldPieData[i-1].endAngle; | |
e0 = oldPieData[i-1].endAngle; | |
} else if(!(oldPieData[i-1]) && oldPieData.length > 0){ | |
s0 = oldPieData[oldPieData.length-1].endAngle; | |
e0 = oldPieData[oldPieData.length-1].endAngle; | |
} else { | |
s0 = 0; | |
e0 = 0; | |
} | |
var i = d3.interpolate({startAngle: s0, endAngle: e0}, {startAngle: d.startAngle, endAngle: d.endAngle}); | |
return function(t) { | |
var b = i(t); | |
return arc(b); | |
}; | |
}; | |
var pie = Math.PI * 2; | |
var w = 960, | |
h = 500; | |
var duration = 750; | |
var chart = d3.select('.chart') | |
.attr('width', w) | |
.attr('height',h) | |
.append('g') | |
.attr('transform', 'translate('+w/2+','+ h/2 + ')'), | |
pieChart = d3.layout.pie() | |
.value(function(d){ return d.value; }) | |
.sort(null), | |
oldPieData = [], | |
groups = chart.append ("g") | |
.attr("class", "groups"), | |
// group at the center of donut | |
center_group = chart.append('g') | |
.attr("class", "center_group") | |
.append('text') | |
.attr({'text-anchor': 'middle', dy: "0.35em"}); | |
createPieChart = function(data){ | |
var radius = 200, innerRadius = radius - 100; | |
var pieData, | |
color = d3.scale.ordinal() | |
.range(['#469AB2', '#F0AD4E', '#5CB85C', '#D9534F']) | |
.domain(data.map(function(d){return d.name})); | |
// displaying total calls at the center | |
center_group.text(d3.format(",.1f")(d3.sum(data, function(d){return d.value}))); | |
arc = d3.svg.arc() | |
.innerRadius(innerRadius) | |
.outerRadius(radius); | |
var arcs = groups.selectAll('path') | |
.data((pieData = pieChart(data)), function(d){return d.data.name}); | |
arcs.enter().append('path') | |
.attr('class', 'arc'); | |
arcs.attr('fill', function(d){ return color(d.data.name)}) | |
.transition() | |
.duration(duration) | |
.attrTween("d", pieTween) | |
.ease("bounce"); | |
function computeTextRotation(d) { | |
var rotation = (d.startAngle + d.endAngle)/2 * 180 / Math.PI - 90; | |
return { | |
global: rotation, | |
correction: rotation > 90 ? 180 : 0 | |
}; | |
} | |
var labels = groups.selectAll("text") | |
.data(pieData); | |
labels.enter().append("text") | |
.attr({"text-anchor": "middle"}) | |
.text(function(d) { | |
return d.data.name | |
}) | |
.attr("dy", ".35em") // vertical-align | |
.style("font-size", 14); | |
labels | |
.transition() | |
.duration(duration) | |
.attr("transform", function(d) { | |
var r = computeTextRotation(d); | |
return "rotate(" + r.global + ")" + "translate(" + (radius + innerRadius) / 2 + ",0)" + "rotate(" + -r.correction + ")"; | |
}) | |
.call(endAll, function(){ | |
window.requestAnimationFrame( | |
function(){crm(createPieChart)} | |
) | |
}); | |
return pieData; | |
}; | |
crm(createPieChart); | |
// window.setInterval(function(){crm(createPieChart)}, duration + 0) | |
var cBarTop = svg1.append("rect") | |
.attr({ | |
"class": "bars", | |
"id": "cBarTop", | |
"x": marginX + width*0.25, | |
"width": barWidth, | |
"y": height/2 - barHeight - 2, | |
"height": barHeight | |
}); | |
var fBarTop = svg2.append("rect") | |
.attr({ | |
"class": "bars", | |
"id": "fBarTop", | |
"x": marginX + width * 0.25, | |
"width": barWidth, | |
"y": height / 2 - barHeight - 2, | |
"height": barHeight | |
}); | |
var cBarBot = svg1.append("rect") | |
.attr({ | |
"class": "bars", | |
"id": "cBarBot", | |
"x": marginX + width / 2, | |
"width": barWidth, | |
"y": height / 2 + 2, | |
"height": barHeight | |
}); | |
var fBarBot = svg2.append("rect") | |
.attr({ | |
"class": "bars", | |
"id": "fBarBot", | |
"x": marginX + width / 2, | |
"width": barWidth, | |
"y": height / 2 + 2, | |
"height": barHeight | |
}); | |
</script> | |
</body> | |
</html> |
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