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g.line.js
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g.line.js
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/*!
* g.Raphael 0.4.2 - Charting library, based on Raphaël
*
* Copyright (c) 2009 Dmitry Baranovskiy (http://g.raphaeljs.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*/
Raphael.fn.g.linechart = function (x, y, width, height, valuesx, valuesy, opts) {
function shrink(values, dim) {
var k = values.length / dim,
j = 0,
l = k,
sum = 0,
res = [];
while (j < values.length) {
l--;
if (l < 0) {
sum += values[j] * (1 + l);
res.push(sum / k);
sum = values[j++] * -l;
l += k;
} else {
sum += values[j++];
}
}
return res;
}
function getAnchors(p1x, p1y, p2x, p2y, p3x, p3y) {
var l1 = (p2x - p1x) / 2,
l2 = (p3x - p2x) / 2,
a = Math.atan((p2x - p1x) / Math.abs(p2y - p1y)),
b = Math.atan((p3x - p2x) / Math.abs(p2y - p3y));
a = p1y < p2y ? Math.PI - a : a;
b = p3y < p2y ? Math.PI - b : b;
var alpha = Math.PI / 2 - ((a + b) % (Math.PI * 2)) / 2,
dx1 = l1 * Math.sin(alpha + a),
dy1 = l1 * Math.cos(alpha + a),
dx2 = l2 * Math.sin(alpha + b),
dy2 = l2 * Math.cos(alpha + b);
return {
x1: p2x - dx1,
y1: p2y + dy1,
x2: p2x + dx2,
y2: p2y + dy2
};
}
opts = opts || {};
if (!this.raphael.is(valuesx[0], "array")) {
valuesx = [valuesx];
}
if (!this.raphael.is(valuesy[0], "array")) {
valuesy = [valuesy];
}
var gutter = opts.gutter || 10,
len = Math.max(valuesx[0].length, valuesy[0].length),
symbol = opts.symbol || "",
colors = opts.colors || Raphael.fn.g.colors,
alpha = opts.alpha || Raphael.fn.g.alpha,
that = this,
columns = null,
dots = null,
chart = this.set(),
path = [];
for (var i = 0, ii = valuesy.length; i < ii; i++) {
len = Math.max(len, valuesy[i].length);
}
var shades = this.set();
for (i = 0, ii = valuesy.length; i < ii; i++) {
if (opts.shade) {
shades.push(this.path().attr({stroke: "none", fill: colors[i], opacity: opts.nostroke ? 1 : alpha[i]}));
}
if (valuesy[i].length > width - 2 * gutter) {
valuesy[i] = shrink(valuesy[i], width - 2 * gutter);
len = width - 2 * gutter;
}
if (valuesx[i] && valuesx[i].length > width - 2 * gutter) {
valuesx[i] = shrink(valuesx[i], width - 2 * gutter);
}
}
var allx = Array.prototype.concat.apply([], valuesx),
ally = Array.prototype.concat.apply([], valuesy),
xdim = this.g.snapEnds(Math.min.apply(Math, allx), Math.max.apply(Math, allx), valuesx[0].length - 1),
minx = xdim.from,
maxx = xdim.to,
ydim = this.g.snapEnds(Math.min.apply(Math, ally), Math.max.apply(Math, ally), valuesy[0].length - 1),
miny = ydim.from,
maxy = ydim.to,
kx = (width - gutter * 2) / ((maxx - minx) || 1),
ky = (height - gutter * 2) / ((maxy - miny) || 1);
var axis = this.set();
if (opts.axis) {
var ax = (opts.axis + "").split(/[,\s]+/);
+ax[0] && axis.push(this.g.axis(x + gutter, y + gutter, width - 2 * gutter, minx, maxx, opts.axisxstep || Math.floor((width - 2 * gutter) / 20), 2));
+ax[1] && axis.push(this.g.axis(x + width - gutter, y + height - gutter, height - 2 * gutter, miny, maxy, opts.axisystep || Math.floor((height - 2 * gutter) / 20), 3));
+ax[2] && axis.push(this.g.axis(x + gutter, y + height - gutter, width - 2 * gutter, minx, maxx, opts.axisxstep || Math.floor((width - 2 * gutter) / 20), 0));
+ax[3] && axis.push(this.g.axis(x + gutter, y + height - gutter, height - 2 * gutter, miny, maxy, opts.axisystep || Math.floor((height - 2 * gutter) / 20), 1));
}
var lines = this.set(),
symbols = this.set(),
line;
for (i = 0, ii = valuesy.length; i < ii; i++) {
if (!opts.nostroke) {
lines.push(line = this.path().attr({
stroke: colors[i],
"stroke-width": opts.width || 2,
"stroke-linejoin": "round",
"stroke-linecap": "round",
"stroke-dasharray": opts.dash || ""
}));
}
var sym = this.raphael.is(symbol, "array") ? symbol[i] : symbol,
symset = this.set();
path = [];
for (var j = 0, jj = valuesy[i].length; j < jj; j++) {
var X = x + gutter + ((valuesx[i] || valuesx[0])[j] - minx) * kx,
Y = y + height - gutter - (valuesy[i][j] - miny) * ky;
(Raphael.is(sym, "array") ? sym[j] : sym) && symset.push(this.g[Raphael.fn.g.markers[this.raphael.is(sym, "array") ? sym[j] : sym]](X, Y, (opts.width || 2) * 3).attr({fill: colors[i], stroke: "none"}));
if (opts.smooth) {
if (j && j != jj - 1) {
var X0 = x + gutter + ((valuesx[i] || valuesx[0])[j - 1] - minx) * kx,
Y0 = y + height - gutter - (valuesy[i][j - 1] - miny) * ky,
X2 = x + gutter + ((valuesx[i] || valuesx[0])[j + 1] - minx) * kx,
Y2 = y + height - gutter - (valuesy[i][j + 1] - miny) * ky;
var a = getAnchors(X0, Y0, X, Y, X2, Y2);
path = path.concat([a.x1, a.y1, X, Y, a.x2, a.y2]);
}
if (!j) {
path = ["M", X, Y, "C", X, Y];
}
} else {
path = path.concat([j ? "L" : "M", X, Y]);
}
}
if (opts.smooth) {
path = path.concat([X, Y, X, Y]);
}
symbols.push(symset);
if (opts.shade) {
shades[i].attr({path: path.concat(["L", X, y + height - gutter, "L", x + gutter + ((valuesx[i] || valuesx[0])[0] - minx) * kx, y + height - gutter, "z"]).join(",")});
}
!opts.nostroke && line.attr({path: path.join(",")});
}
function createColumns(f) {
// unite Xs together
var Xs = [];
for (var i = 0, ii = valuesx.length; i < ii; i++) {
Xs = Xs.concat(valuesx[i]);
}
Xs.sort();
// remove duplicates
var Xs2 = [],
xs = [];
for (i = 0, ii = Xs.length; i < ii; i++) {
Xs[i] != Xs[i - 1] && Xs2.push(Xs[i]) && xs.push(x + gutter + (Xs[i] - minx) * kx);
}
Xs = Xs2;
ii = Xs.length;
var cvrs = f || that.set();
for (i = 0; i < ii; i++) {
var X = xs[i] - (xs[i] - (xs[i - 1] || x)) / 2,
w = ((xs[i + 1] || x + width) - xs[i]) / 2 + (xs[i] - (xs[i - 1] || x)) / 2,
C;
f ? (C = {}) : cvrs.push(C = that.rect(X - 1, y, Math.max(w + 1, 1), height).attr({stroke: "none", fill: "#000", opacity: 0}));
C.values = [];
C.symbols = that.set();
C.y = [];
C.x = xs[i];
C.axis = Xs[i];
for (var j = 0, jj = valuesy.length; j < jj; j++) {
Xs2 = valuesx[j] || valuesx[0];
for (var k = 0, kk = Xs2.length; k < kk; k++) {
if (Xs2[k] == Xs[i]) {
C.values.push(valuesy[j][k]);
C.y.push(y + height - gutter - (valuesy[j][k] - miny) * ky);
C.symbols.push(chart.symbols[j][k]);
}
}
}
f && f.call(C);
}
!f && (columns = cvrs);
}
function createDots(f) {
var cvrs = f || that.set(),
C;
for (var i = 0, ii = valuesy.length; i < ii; i++) {
for (var j = 0, jj = valuesy[i].length; j < jj; j++) {
var X = x + gutter + ((valuesx[i] || valuesx[0])[j] - minx) * kx,
nearX = x + gutter + ((valuesx[i] || valuesx[0])[j ? j - 1 : 1] - minx) * kx,
Y = y + height - gutter - (valuesy[i][j] - miny) * ky;
f ? (C = {}) : cvrs.push(C = that.circle(X, Y, Math.abs(nearX - X) / 2).attr({stroke: "none", fill: "#000", opacity: 0}));
C.x = X;
C.y = Y;
C.value = valuesy[i][j];
C.line = chart.lines[i];
C.shade = chart.shades[i];
C.symbol = chart.symbols[i][j];
C.symbols = chart.symbols[i];
C.axis = (valuesx[i] || valuesx[0])[j];
f && f.call(C);
}
}
!f && (dots = cvrs);
}
chart.push(lines, shades, symbols, axis, columns, dots);
chart.lines = lines;
chart.shades = shades;
chart.symbols = symbols;
chart.axis = axis;
chart.hoverColumn = function (fin, fout) {
!columns && createColumns();
columns.mouseover(fin).mouseout(fout);
return this;
};
chart.clickColumn = function (f) {
!columns && createColumns();
columns.click(f);
return this;
};
chart.hrefColumn = function (cols) {
var hrefs = that.raphael.is(arguments[0], "array") ? arguments[0] : arguments;
if (!(arguments.length - 1) && typeof cols == "object") {
for (var x in cols) {
for (var i = 0, ii = columns.length; i < ii; i++) if (columns[i].axis == x) {
columns[i].attr("href", cols[x]);
}
}
}
!columns && createColumns();
for (i = 0, ii = hrefs.length; i < ii; i++) {
columns[i] && columns[i].attr("href", hrefs[i]);
}
return this;
};
chart.hover = function (fin, fout) {
!dots && createDots();
dots.mouseover(fin).mouseout(fout);
return this;
};
chart.click = function (f) {
!dots && createDots();
dots.click(f);
return this;
};
chart.each = function (f) {
createDots(f);
return this;
};
chart.eachColumn = function (f) {
createColumns(f);
return this;
};
return chart;
};