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script.js
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script.js
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////////////////////////////////////////////////////////////
//////////////////////// Set-up ////////////////////////////
////////////////////////////////////////////////////////////
var screenWidth = $(window).innerWidth(),
mobileScreen = (screenWidth > 500 ? false : true);
var margin = {left: 50, top: 10, right: 50, bottom: 10},
width = Math.min(screenWidth, 800) - margin.left - margin.right,
height = (mobileScreen ? 300 : Math.min(screenWidth, 800)*5/6) - margin.top - margin.bottom;
var svg = d3.select("#chart").append("svg")
.attr("width", (width + margin.left + margin.right))
.attr("height", (height + margin.top + margin.bottom));
var wrapper = svg.append("g").attr("class", "chordWrapper")
.attr("transform", "translate(" + (width / 2 + margin.left) + "," + (height / 2 + margin.top) + ")");;
var outerRadius = Math.min(width, height) / 2 - (mobileScreen ? 80 : 100),
innerRadius = outerRadius * 0.95,
opacityDefault = 0.7, //default opacity of chords
opacityLow = 0.02; //hover opacity of those chords not hovered over
//How many pixels should the two halves be pulled apart
var pullOutSize = (mobileScreen? 20 : 50)
////////////////////////////////////////////////////////////
/////////////////// Animated gradient //////////////////////
////////////////////////////////////////////////////////////
var defs = wrapper.append("defs");
var linearGradient = defs.append("linearGradient")
.attr("id","animatedGradient")
.attr("x1","0%")
.attr("y1","0%")
.attr("x2","100%")
.attr("y2","0")
.attr("spreadMethod", "reflect");
linearGradient.append("animate")
.attr("attributeName","x1")
.attr("values","0%;100%")
// .attr("from","0%")
// .attr("to","100%")
.attr("dur","7s")
.attr("repeatCount","indefinite");
linearGradient.append("animate")
.attr("attributeName","x2")
.attr("values","100%;200%")
// .attr("from","100%")
// .attr("to","200%")
.attr("dur","7s")
.attr("repeatCount","indefinite");
linearGradient.append("stop")
.attr("offset","5%")
.attr("stop-color","#E8E8E8");
linearGradient.append("stop")
.attr("offset","45%")
.attr("stop-color","#A3A3A3");
linearGradient.append("stop")
.attr("offset","55%")
.attr("stop-color","#A3A3A3");
linearGradient.append("stop")
.attr("offset","95%")
.attr("stop-color","#E8E8E8");
////////////////////////////////////////////////////////////
////////////////////////// Data ////////////////////////////
////////////////////////////////////////////////////////////
//Total number of respondents (i.e. the number that make up the total group
const arrSum = array =>
array.reduce(
(sum, num) => sum + (Array.isArray(num) ? arrSum(num) : num * 1),
0
);
var respondents = arrSum(matrix);
var emptyPerc = 0.15, //What % of the circle should become empty
emptyStroke = Math.round(respondents*emptyPerc);
// adjacency matrix
matrix.forEach(function(line,i){
line.forEach(function(item,j){if (item == -1) line[j] = emptyStroke;});
});
// indicators and dimensions
var Names = Dimension.concat(Indicator);
//var Names = [
//"ilc_pees01", "ilc_pees02", "ilc_pees03", "ilc_pees04", "ilc_pees05", "ilc_pees06", "ilc_pees07", "ilc_pees08", "ilc_peps01", "ilc_peps02", "ilc_peps03", "ilc_peps04", "ilc_peps05", "ilc_peps06", "ilc_peps07", "ilc_peps11", "ilc_peps13", "ilc_peps60", "",
//"age", "c_birth", "citizen", "deg_urb", "hhtyp", "indic_il", "isced11", "quantile", "sex", "tenure", "unit", "wstatus", ""
//];
//var respondents = 88, //Total number of respondents (i.e. the number that make up the total group
// emptyPerc = 0.1, //What % of the circle should become empty
// emptyStroke = Math.round(respondents*emptyPerc);
//var matrix =
// [[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,1,0,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,1,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,emptyStroke],
//[1,0,0,0,0,0,0,0,1,1,0,1,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[1,0,0,0,0,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[1,0,0,0,0,0,0,1,1,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
//[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,emptyStroke,0,0,0,0,0,0,0,0,0,0,0,0,0]];
//Calculate how far the Chord Diagram needs to be rotated clockwise to make the dummy
//invisible chord center vertically
var offset = (2 * Math.PI) * (emptyStroke/(respondents + emptyStroke))/4;
//Custom sort function of the chords to keep them in the original order
var chord = customChordLayout() //d3.layout.chord()
.padding(.02)
.sortChords(d3.descending) //which chord should be shown on top when chords cross. Now the biggest chord is at the bottom
.matrix(matrix);
var arc = d3.svg.arc()
.innerRadius(innerRadius)
.outerRadius(outerRadius)
.startAngle(startAngle) //startAngle and endAngle now include the offset in degrees
.endAngle(endAngle);
var path = stretchedChord() //Call the stretched chord function
.radius(innerRadius)
.startAngle(startAngle)
.endAngle(endAngle)
.pullOutSize(pullOutSize);
////////////////////////////////////////////////////////////
//////////////////// Draw outer Arcs ///////////////////////
////////////////////////////////////////////////////////////
var g = wrapper.selectAll("g.group")
.data(chord.groups)
.enter().append("g")
.attr("class", "group")
.on("mouseover", fade(opacityLow))
.on("mouseout", fade(opacityDefault));
g.append("path")
.style("stroke", function(d,i) { return (Names[i] === "" ? "none" : "#00A1DE"); })
.style("fill", function(d,i) { return (Names[i] === "" ? "none" : "#00A1DE"); })
.style("pointer-events", function(d,i) { return (Names[i] === "" ? "none" : "auto"); })
.attr("d", arc)
.attr("transform", function(d, i) { //Pull the two slices apart
d.pullOutSize = pullOutSize * ( d.startAngle + 0.5 > Math.PI ? -1 : 1);
return "translate(" + d.pullOutSize + ',' + 0 + ")";
});
////////////////////////////////////////////////////////////
////////////////////// Append Names ////////////////////////
////////////////////////////////////////////////////////////
//The text also needs to be displaced in the horizontal directions
//And also rotated with the offset in the clockwise direction
g.append("text")
.each(function(d) { d.angle = ((d.startAngle + d.endAngle) / 2) + offset;})
.attr("dy", ".35em")
.attr("class", "titles")
.style("font-size", mobileScreen ? "8px" : "10px" )
.attr("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; })
.attr("transform", function(d,i) {
var c = arc.centroid(d);
return "translate(" + (c[0] + d.pullOutSize) + "," + c[1] + ")"
+ "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
+ "translate(" + 20 + ",0)"
+ (d.angle > Math.PI ? "rotate(180)" : "")
})
.text(function(d,i) { return Names[i]; })
//.links(function(d,i) { return "http://appsso.eurostat.ec.europa.eu/nui/show.do?lang=en&dataset=" + Names[i]; })
.call(wrapChord, 100);
////////////////////////////////////////////////////////////
//////////////////// Draw inner chords /////////////////////
////////////////////////////////////////////////////////////
wrapper.selectAll("path.chord")
.data(chord.chords)
.enter().append("path")
.attr("class", "chord")
.style("stroke", "none")
.style("fill", "url(#animatedGradient)") //An SVG Gradient to give the impression of a flow from left to right
.style("opacity", function(d) { return (Names[d.source.index] === "" ? 0 : opacityDefault); }) //Make the dummy strokes have a zero opacity (invisible)
.style("pointer-events", function(d,i) { return (Names[d.source.index] === "" ? "none" : "auto"); }) //Remove pointer events from dummy strokes
.attr("d", path)
.on("mouseover", fadeOnChord)
.on("mouseout", fade(opacityDefault));
////////////////////////////////////////////////////////////
////////////////// Extra Functions /////////////////////////
////////////////////////////////////////////////////////////
//Include the offset in de start and end angle to rotate the Chord diagram clockwise
function startAngle(d) { return d.startAngle + offset; }
function endAngle(d) { return d.endAngle + offset; }
// Returns an event handler for fading a given chord group
function fade(opacity) {
return function(d, i) {
wrapper.selectAll("path.chord")
.filter(function(d) { return d.source.index !== i && d.target.index !== i && Names[d.source.index] !== ""; })
.transition()
.style("opacity", opacity);
};
}//fade
// Fade function when hovering over chord
function fadeOnChord(d) {
var chosen = d;
wrapper.selectAll("path.chord")
.transition()
.style("opacity", function(d) {
return d.source.index === chosen.source.index && d.target.index === chosen.target.index ? opacityDefault : opacityLow;
});
}//fadeOnChord
/*Taken from http://bl.ocks.org/mbostock/7555321
//Wraps SVG text*/
function wrapChord(text, width) {
text.each(function() {
var text = d3.select(this),
words = text.text().split(/\s+/).reverse(),
word,
line = [],
lineNumber = 0,
lineHeight = 1.1, // ems
y = 0,
x = 0,
dy = parseFloat(text.attr("dy")),
tspan = text.text(null).append("tspan").attr("x", x).attr("y", y).attr("dy", dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > width) {
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan").attr("x", x).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
}
}
});
}//wrapChord