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Created new functionality: Donut chart #210

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Created new functionality: Donut chart #210

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308 changes: 308 additions & 0 deletions g.donut.js
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/*!
* g.Raphael 0.52 - Charting library, based on Raphaël
* Copyright (c) 2015 Codrin Fechete, after g.pie.js file by Copyright (c) 2009-2012 Dmitry Baranovskiy (http://g.raphaeljs.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*/

/*
* donuthart method on paper
*/
/*\
* Paper.donutchart
[ method ]
**
* Creates a donut chart
**
> Parameters
**
- cx (number) x coordinate of the chart
- cy (number) y coordinate of the chart
- r (integer) radius of the chart
- rint (integer) radius of the chart's interior
- values (array) values used to plot
- opts (object) options for the chart
o {
o minPercent (number) minimal percent threshold which will have a slice rendered. Sliced corresponding to data points below this threshold will be collapsed into 1 additional slice. [default `1`]
o maxSlices (number) a threshold for how many slices should be rendered before collapsing all remaining slices into 1 additional slice (to focus on most important data points). [default `100`]
o stroke (string) color of the chart stroke in HTML color format [default `"#FFF"`]
o strokewidth (integer) width of the chart stroke [default `1`]
o init (boolean) whether or not to show animation when the chart is ready [default `false`]
o colors (array) colors be used to plot the chart
o href (array) urls to to set up clicks on chart slices
o legend (array) array containing strings that will be used in a legend. Other label options work if legend is defined.
o legendcolor (string) color of text in legend [default `"#000"`]
o legendothers (string) text that will be used in legend to describe options that are collapsed into 1 slice, because they are too small to render [default `"Others"`]
o legendmark (string) symbol used as a bullet point in legend that has the same colour as the chart slice [default `"circle"`]
o legendpos (string) position of the legend on the chart [default `"east"`]. Other options are `"north"`, `"south"`, `"west"`
o }
**
= (object) path element of the popup
> Usage
| r.piechart(cx, cy, r, values, opts)
\*/

(function () {

function Donatchart(paper, cx, cy, r, rin, values, opts) {
r = Math.max(r,rin);
rin = Math.min(r,rin);
opts = opts || {};

var chartinst = this,
rad = Math.PI / 180,
sectors = [],
covers = paper.set(),
borders = paper.set(),
chart = paper.set(),
series = paper.set(),
finalDim = paper.set(),
order = [],
len = values.length,
angle = 0,
total = 0,
others = 0,
cut = opts.maxSlices || 100,
minPercent = parseFloat(opts.minPercent) || 1,
angleplus = 0,
defcut = Boolean( minPercent );

function sector(cx, cy, r, rin, startAngle, endAngle) {
var x1 = cx + r * Math.cos(-startAngle * rad),
x2 = cx + r * Math.cos(-endAngle * rad),
y1 = cy + r * Math.sin(-startAngle * rad),
y2 = cy + r * Math.sin(-endAngle * rad),
xx1 = cx + rin * Math.cos(-startAngle * rad),
xx2 = cx + rin * Math.cos(-endAngle * rad),
yy1 = cy + rin * Math.sin(-startAngle * rad),
yy2 = cy + rin * Math.sin(-endAngle * rad),
xm = cx + r / 2 * Math.cos(-(startAngle + (endAngle - startAngle) / 2) * rad),
ym = cy + r / 2 * Math.sin(-(startAngle + (endAngle - startAngle) / 2) * rad),
res = ["M", xx1, yy1,
"L", x1, y1,
"A", r, r, 0, +(endAngle - startAngle > 180), 0, x2, y2,
"L", xx2, yy2,
"A", rin, rin, 0, +(endAngle - startAngle > 180), 1, xx1, yy1, "z"];
res.middle = { x: xm, y: ym };
return res;
}
chart.covers = covers;
if (len == 1) {
var cint = paper.circle(cx, cy, rin).attr({stroke: opts.stroke || "#000", "stroke-width": opts.strokewidth || 1, fill:""});
var cext = paper.circle(cx, cy, r).attr({stroke: opts.stroke || "#000", "stroke-width": opts.strokewidth || 1, fill:""});

series.push(paper.path(sector(cx, cy, r, rin, 0.001, 360)).attr({ fill: opts.colors && opts.colors[0] || chartinst.colors[0], "stroke-width": 0 }));
covers.push(paper.path(sector(cx, cy, r, rin, 0.001, 360)).attr(chartinst.shim));

series[0].cint = cint;
series[0].cext = cext;

total = values[0];
values[0] = { value: values[0], order: 0, valueOf: function () { return this.value; } };
opts.href && opts.href[0] && covers[0].attr({ href: opts.href[0] });
series[0].middle = {x: cx, y: cy};
series[0].mangle = 180;
} else {
// Calculate total:
for (var i = 0; i < len; i++) {
total += values[i];
values[i] = { value: values[i], order: i, valueOf: function () { return this.value; } };
}
// Values are sorted numerically:
values.sort(function (a, b) {
return b.value - a.value;
});

for (i = 0; i < len; i++) {
if (defcut && values[i] * 100 / total < minPercent) {
cut = i;
defcut = false;
}
if (i > cut) {
defcut = false;
values[cut].value += values[i];
values[cut].others = true;
others = values[cut].value;
}
}

len = Math.min(cut + 1, values.length);
others && values.splice(len) && (values[cut].others = true);

for (i = 0; i < len; i++) {
var mangle = angle - 360 * values[i] / total / 2;
if (!i) {
angle = 90 - mangle;
mangle = angle - 360 * values[i] / total / 2;
}
if (opts.init) {
if(!i){
var ipath = sector(cx, cy, 5, 1, angle, angle - 360 * values[i] / total).join(",");
}else{
var ipath = sector(cx, cy, 5, 1, angle, angle + angleplus).join(",");
}
}
angleplus = 360 * values[i] / total;

var path = sector(cx, cy, r, rin, angle, angle + angleplus);
var j = (opts.matchColors && opts.matchColors == true) ? values[i].order : i;
var p = paper.path(opts.init ? ipath : path).attr({ fill: opts.colors && opts.colors[j] || chartinst.colors[j] || "#666", stroke: opts.stroke || "#fff", "stroke-width": (opts.strokewidth == null ? 1 : opts.strokewidth), "stroke-linejoin": "round" });

p.value = values[i];
p.middle = path.middle;
p.mangle = mangle;
sectors.push(p);
series.push(p);
finalDim.push(paper.path(path).hide());
// opts.init && p.animate({callback:initHref, path: path.join(",") }, (+opts.init - 1) || 1000, ">");
opts.init && p.animate({path: path.join(",") }, (+opts.init - 1) || 1000, ">");
angle += angleplus;

}
for (i = 0; i < len; i++) {
p = paper.path(finalDim[i].attr("path")).attr(chartinst.shim);
opts.href && opts.href[i] && p.attr({ href: opts.href[i] });// one line if
p.attr = function () {};
covers.push(p);
series.push(p);
}
}
chart.hover = function (fin, fout) {
fout = fout || function () {};
var that = this;
for (var i = 0; i < len; i++) {
(function (sector, cover, j) {
var o = {
sector: sector,
cover: cover,
cx: cx,
cy: cy,
mx: sector.middle.x,
my: sector.middle.y,
mangle: sector.mangle,
r: r,
value: values[j],
total: total,
label: that.labels && that.labels[j]
};
cover.mouseover(function () {
fin.call(o);
}).mouseout(function () {
fout.call(o);
});
})(series[i], covers[i], i);
}
return this;
};

// x: where label could be put
// y: where label could be put
// value: value to show
// total: total number to count %
chart.each = function (f) {
var that = this;
for (var i = 0; i < len; i++) {
(function (sector, cover, j) {
var o = {
sector: sector,
cover: cover,
cx: cx,
cy: cy,
x: sector.middle.x,
y: sector.middle.y,
mangle: sector.mangle,
r: r,
value: values[j],
total: total,
label: that.labels && that.labels[j]
};
f.call(o);
})(series[i], covers[i], i);
}
return this;
};

chart.click = function (f) {
var that = this;
for (var i = 0; i < len; i++) {
(function (sector, cover, j) {
var o = {
sector: sector,
cover: cover,
cx: cx,
cy: cy,
mx: sector.middle.x,
my: sector.middle.y,
mangle: sector.mangle,
r: r,
value: values[j],
total: total,
label: that.labels && that.labels[j]
};
cover.click(function () { f.call(o); });
})(series[i], covers[i], i);
}
return this;
};

chart.inject = function (element) {
element.insertBefore(covers[0]);
};

var legend = function (labels, otherslabel, mark, dir) {
var x = cx + r + r / 5,
y = cy,
h = y + 10;

labels = labels || [];
dir = (dir && dir.toLowerCase && dir.toLowerCase()) || "east";
mark = paper[mark && mark.toLowerCase()] || "circle";
chart.labels = paper.set();

for (var i = 0; i < len; i++) {
var clr = series[i].attr("fill"),
j = values[i].order,
txt;

values[i].others && (labels[j] = otherslabel || "Others");
labels[j] = chartinst.labelise(labels[j], values[i], total);
chart.labels.push(paper.set());
chart.labels[i].push(paper[mark](x + 5, h, 5).attr({ fill: clr, stroke: "none" }));
chart.labels[i].push(txt = paper.text(x + 20, h, labels[j] || values[j]).attr(chartinst.txtattr).attr({ fill: opts.legendcolor || "#000", "text-anchor": "start"}));
covers[i].label = chart.labels[i];
h += txt.getBBox().height * 1.2;
}

var bb = chart.labels.getBBox(),
tr = {
east: [0, -bb.height / 2],
west: [-bb.width - 2 * r - 40, -bb.height / 2],
north: [-r - bb.width / 2, -r - bb.height - 10],
south: [-r - bb.width / 2, r + 10]
}[dir];

chart.labels.translate.apply(chart.labels, tr);
chart.push(chart.labels);
};

if (opts.legend) {
legend(opts.legend, opts.legendothers, opts.legendmark, opts.legendpos);
}

chart.push(series, covers);
chart.series = series;
chart.covers = covers;

return chart;
};

//inheritance
var F = function() {};
F.prototype = Raphael.g;
Donatchart.prototype = new F;

//public
Raphael.fn.donutchart = function(cx, cy, r, rin, values, opts) {
return new Donatchart(this, cx, cy, r, rin, values, opts);
}

})();
65 changes: 65 additions & 0 deletions test/donutchart.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>gRaphaël Static Pie Chart</title>
<link rel="stylesheet" href="css/demo.css" type="text/css" media="screen" charset="utf-8">
<link rel="stylesheet" href="css/demo-print.css" type="text/css" media="print" charset="utf-8">

<script src="../raphael-min.js" type="text/javascript" charset="utf-8"></script>
<script src="../g.raphael.js" type="text/javascript" charset="utf-8"></script>
<script src="../g.donut.js" type="text/javascript" charset="utf-8"></script>

<script type="text/javascript" charset="utf-8">
window.onload = function () {
var r = Raphael("holder"),
opt = {
legend: ["%%.%% - Opera Users", "%%.%% - IE Users", "%%.%% - Firefox Users", "%%.%% - Chrome Users", "%%.%% - Other Users"],
legendpos: "east",
href: ["http://raphaeljs.com", "http://g.raphaeljs.com"],
stroke: "#fff",
strokewidth: "2",
colors: ["#445", "#9ab", "#2a5", "#44f", "#4f5"],
init: "true"
}
pie = r.donutchart(320, 240, 100, 50, [30, 28, 25, 25, 12], opt);
r.text(320, 100, "Interactive Donut Chart").attr({ font: "20px 'Fontin Sans', Fontin-Sans, sans-serif" });

pie.hover(function () {
var anim = Raphael.animation({ transform: 's1.1 1.1 ' + this.cx + ' ' + this.cy }, 500, "bounce");
this.sector.animate(anim);
if(this.sector.cint){
this.sector.cint.animate(anim);
this.sector.cext.animate(anim);
}
if (this.label) {
this.label[0].stop();
this.label[0].attr({ r: 7.5 });
this.label[1].attr({ "font-weight": 800 });
}
}, function () {
var anim = Raphael.animation({ transform: 's1 1 ' + this.cx + ' ' + this.cy }, 500, "bounce");
this.sector.animate(anim);
if(this.sector.cint){
this.sector.cint.animate(anim);
this.sector.cext.animate(anim);
}
if (this.label) {
this.label[0].animate({ r: 5 }, 500, "bounce");
this.label[1].attr({ "font-weight": 400 });
}
});

};
</script>
</head>
<body class="raphael" id="g.raphael.dmitry.baranovskiy.com">
<div id="holder"></div>
<p>
Donut chart with legend, hyperlinks on two first sectors and hover effect.
</p>
<p>
Demo of <a href="http://g.raphaeljs.com/">g·Raphaël</a> JavaScript library.
</p>
</body>
</html>