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Last active August 29, 2015 13:56
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Stadium Chart
Raw
README.md

Stadium Chart

A solution to proportional comparisons between independent groups, inspired by my memory of stadium checkers.

Raw
index.html
<!DOCTYPE html>
<html>
<head>
<style>
.major_tick.label{
font-family:serif;
font-size:11px;
text-anchor:start;
}
.major_tick.ticks{
stroke:white;
stroke-width:3px;
}
.major_tick.base{
stroke:white;
stroke-width:4px;
}
.path_labs{
font-family:sans-serif;
kerning:3;
fill:white;
font-weight:600;
font-size:16px;
}
.tick_lab{
kerning:1;
fill:#999999;
}
.viz_key{
font-family:"Times New Roman",serif;
font-size:20px;
font-style:italic;
}
.viz_instruct{
font-family:sans-serif;
font-size:12px;
font-style:italic;
}
</style>
</head>
<body>
<div id="viz"></div>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
//Helper function
//http://stackoverflow.com/questions/8273047/javascript-function-similar-to-python-range
function range(start, stop, step){
if (typeof stop=='undefined'){
// one param defined
stop = start;
start = 0;
};
if (typeof step=='undefined'){
step = 1;
};
if ((step>0 && start>=stop) || (step<0 && start<=stop)){
return [];
};
var result = [];
for (var i=start; step>0 ? i<stop : i>stop; i+=step){
result.push(i);
};
return result;
};
var data = {
NIR : [80,95,91,83],
WAL : [110,127,104,119],
ENG : [2190,1661,1930,2164],
SCO : [220,112,98,320],
DNK : [100,112,91,220],
IRE : [10,12,9,20],
FIN : [14,12,9,22],
EST : [124,212,119,222],
};
//Color scale
var color_scale = ["#3A66A7", "#6b486b", "#d0743c", "#ff8c00"];
//var color_scale=["#40004b", "#9970ab", "#ef3b2c", "#67000d"];
var color = d3.scale.ordinal()
.range(color_scale);
//Some quick convertors
var radian = function(i){ return i * Math.PI/180 };
var degree = function(i){ return i * 180/Math.PI };
var margin = {top: 30, right: 100, bottom:30,left:30,
center_ring_radius:40};
//padding inbetween rings as percentage of width
var percent_pad = .2;
var data_length = Object.keys(data).length;
var width = 500,
height = 470,
svg_width = width - margin.right - margin.left,
svg_height = height - margin.bottom - margin.top,
center_x = margin.left + svg_width/2,
center_y = margin.top + svg_height/2,
outer_radius = Math.min(svg_width,svg_height) / 2,
annulus_width = (outer_radius-margin.center_ring_radius)/
((data_length-1) * percent_pad + data_length),
pad_width = annulus_width*percent_pad;
function arc(i){
return d3.svg.arc()
.outerRadius(outer_radius - i * (annulus_width+pad_width))
.innerRadius((outer_radius - i * (annulus_width+pad_width))-annulus_width)
}
//a starting angle
var angle = 0;
var state_angle = angle;
var tick_angles = [0,90,180,270];
var radius = Math.min(svg_width,svg_height)/2;
//Canvas
var svg = d3.select("#viz").append("svg")
.attr("class",key)
.attr("width",width)
.attr("height",height);
var g = svg.append("g")
.style("pointer-events","none")
.attr("transform","translate("+
(svg_width/2+margin.left)+","+(svg_height/2+margin.top) +")");
//Tick Labels
//Major
var tick_percents = [0,50];
for (tick in tick_percents){
svg.append("text")
.text(tick_percents[tick]+"%")
.attr("class","tick_lab")
.style("font-size","13px")
.style("fill","black")
.style("text-anchor","middle")
.style("dominant-baseline","central")
//.attr("dy",function(){return this.getBBox().height/2 ;})
//.attr("dx",function(){return this.getBBox().width/2 ;})
.attr("angle_state",180-angle-180*(Number(tick)+0))
.attr("x",center_x + (radius+12) *Math.sin(radian(180-angle-180*(Number(tick)+0))))
.attr("y",center_y + (radius+12) *Math.cos(radian(180-angle-180*(Number(tick)+0))))
;
};
//Minor
var tick_percents = [10,20,30,40];
for (tick in tick_percents){
svg.append("text")
.attr("class","tick_lab")
.style("font-size","11px")
.style("text-anchor","middle")
.attr("dy",5)
.attr("dx",2)
.attr("angle_state",180-angle-36*(Number(tick)+1))
.attr("x",center_x + (radius+12) *Math.sin(radian(180-angle-36*(Number(tick)+1))))
.attr("y",center_y + (radius+12) *Math.cos(radian(180-angle-36*(Number(tick)+1))))
.text(tick_percents[tick]);
};
for (var key in data){
var pie = d3.layout.pie().sort(null)
.startAngle(radian(angle))
.endAngle(radian(360+angle));
var path = g.selectAll("g.arc")
.data(pie(data[key]));
path.enter().append("path")
.style("pointer-events","fill")
.style("cursor","pointer")
.attr("class",function(d, i){ return "arc class"+i+" "+key;})
.attr("id",function(d, i){ return "arcclass"+i+key;})
.attr("d",arc(Object.keys(data).indexOf(key)))
.attr("fill", function(d, i) { return color(i); })
.each(function(d) { this._current = d; })
.style("stroke","black").style("stroke-width","0px")
.on("mouseover",function(){
d3.selectAll("."+this.className["baseVal"].split(' ')[1])
.style("stroke-width","1.25px");
d3.select(this).style("stroke","red").style("stroke-width","2px");
})
.on("mouseout",function(){
d3.selectAll(".arc")
.style("stroke-width","0px")
.style("stroke","black");
d3.selectAll(".major_tick.ticks")
.transition().delay(3000)
.style("opacity",0);
d3.selectAll(".tick_lab")
.transition().delay(3000)
.style("opacity",0);
d3.selectAll(".arc")
.transition().delay(3000)
.style("fill-opacity",1);
})
.on("click",function(){
//disable click over animation
d3.selectAll(".arc")
.style("pointer-events","none");
setTimeout(function(){
d3.selectAll(".arc").style("pointer-events","fill");
},2000);
swivel(this);
d3.selectAll(".major_tick.ticks")
.style("opacity",1);
d3.selectAll(".tick_lab")
.style("opacity",1);
})
.append("svg:title")
.text(function(d){return d.value+" GPs";});
for(i in data[key]){
g.append("text")
.attr("x",10)
.attr("dy",annulus_width*.9)
.attr("class","path_labs class"+i)
.style("opacity",0)
.append("textPath")
.attr("xlink:href",function(d){ return "#arcclass"+i+key;})
.text(key);
}
}
//Change Function
function swivel(obj){
var d = degree(obj.__data__.startAngle);
var s=window.state_angle;
console.log("Start Angle: "+s)
console.log("Destination Angle: "+d)
//Guide Lines
var lines = d3.selectAll(".major_tick");
lines.transition().duration(2000)
.attrTween("transform", function() {
return d3.interpolateString("rotate("+s+" "+center_x+","+center_y+")",
"rotate("+d+" "+center_x+","+center_y+")");
});
//Guide Labels
//Some Shorthanded Trig
function strig(x){
return Number(x.getAttribute("angle_state"))
}
function xtrig(x){
return center_x + (radius+12) *Math.sin(radian((s>d) ? strig(x) +(s-d) : strig(x) +(s-d)));
}
function ytrig(y){
return center_y + (radius+12) *Math.cos(radian((s>d) ? strig(y) +(s-d) : strig(y) +(s-d)));
}
var ticklabs = d3.selectAll(".tick_lab");
ticklabs.transition().delay(0)
.attr("x", function(){return xtrig(this);})
.attr("y", function(){return ytrig(this);});
ticklabs.transition().delay(300).attr("angle_state",function(){
return ((d>s) ? 360+s-d : s-d) + Number(this.getAttribute("angle_state")) ;});
//reset angle state variable
window.state_angle=d;
for (var key in data){
//the angle to change
var compare = d3.select(".arc."+obj.className["baseVal"].split(' ')[1]+"."+key);
var compare_angle = degree(compare[0][0].__data__.startAngle);
var state_angle = degree(d3.select(".arc."+key)[0][0].__data__.startAngle);
var adjust_angle = d - compare_angle;
var pie = d3.layout.pie().sort(null)
.startAngle(radian(state_angle+adjust_angle))
.endAngle(radian(360+state_angle+adjust_angle));
var paths = d3.selectAll(".arc."+key);
paths.data(pie(data[key]))
.transition().duration(2000)
.attrTween("d",
function (d) {
var i = d3.interpolate(this._current, d);
this._current = i(0);
//Get index of current
var index = Object.keys(data).indexOf(this.className["baseVal"].split(' ')[2]);
return function(t) {
return arc(index)(i(t));
};
})
.style("fill-opacity",function(d){
if(this.className["baseVal"].split(' ')[1] ==
obj.className["baseVal"].split(' ')[1])
{ return 1; }else{ return .5; }
})
.style("stroke-width",function(d){
if(this.className["baseVal"].split(' ')[1] ==
obj.className["baseVal"].split(' ')[1])
{ return "1.25px"; }else{ return "0px"; }
})
d3.selectAll(".path_labs")
.transition().duration(1000)
.style("opacity",0)
d3.selectAll(".path_labs."+obj.className["baseVal"].split(' ')[1])
.transition().delay(1000).duration(1000)
.style("opacity",1)
}
}
//Ticks
//x = cx + r * sin(a)
//y = cy + r * cos(a)
var tick_labels = [0,20,40,60,80];
for (i in range(data_length)){
for (tick in tick_labels){
var tock = Number(tick);
var tock_angle = radian(180-angle-(360/tick_labels.length*(tock)));
var tock_len = annulus_width*.1;
var trig_point = radius - (Number(i)*(annulus_width+pad_width))
svg.append("line")
.attr("class","major_tick ticks")
.attr("stroke-linecap","round")
.attr("x1",center_x+ (trig_point -tock_len) *Math.sin(Math.PI/2-tock_angle/2))
.attr("y1",center_y+ (trig_point -tock_len) *Math.cos(Math.PI/2-tock_angle/2))
.attr("x2",center_x+ (trig_point) *Math.sin(Math.PI/2-tock_angle/2))
.attr("y2",center_y+ (trig_point) *Math.cos(Math.PI/2-tock_angle/2));
}
}
//Zero Axis
svg.append("line")
.attr("class","major_tick base")
.attr("x1",center_x+(margin.center_ring_radius-4)*Math.sin(radian(0+angle)))
.attr("y1",center_y+(margin.center_ring_radius-4)*Math.cos(radian(180-angle)))
.attr("x2",center_x+ (radius+4) *Math.sin(radian(0+angle)))
.attr("y2",center_y+ (radius+4) *Math.cos(radian(180-angle)));
d3.selectAll(".path_labs.class0")
.style("opacity",1);
//CUSTOM KEY
svg.append("rect")
.attr("class","arc class0")
.attr("x",width-70)
.attr("y", 100)
.attr("width",17)
.attr("height",17)
.attr("fill",color_scale[0]);
svg.append("text")
.attr("class", "viz_key")
.attr("x",width-50)
.attr("y", 115)
.text("L1")
svg.append("rect")
.attr("class","arc class1")
.attr("x",width-70)
.attr("y", 120)
.attr("width",17)
.attr("height",17)
.attr("fill",color_scale[1]);
svg.append("text")
.attr("class", "viz_key")
.attr("x",width-50)
.attr("y", 135)
.text("L2")
svg.append("rect")
.attr("class","arc class2")
.attr("x",width-70)
.attr("y", 140)
.attr("width",17)
.attr("height",17)
.attr("fill",color_scale[2]);
svg.append("text")
.attr("class", "viz_key")
.attr("x",width-50)
.attr("y", 155)
.text("L3")
svg.append("rect")
.attr("class","arc class3")
.attr("x",width-70)
.attr("y", 160)
.attr("width",17)
.attr("height",17)
.attr("fill",color_scale[3]);
svg.append("text")
.attr("class", "viz_key")
.attr("x",width-50)
.attr("y", 175)
.text("L4")
svg.append("text")
.attr("class", "viz_instruct")
.attr("x",width/2-150)
.attr("y", height-15)
.text("Click a group to align bars for comparison.")
</script>
</body>
</html>
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