|
d3.parcoords = function(config) { |
|
var __ = { |
|
data: [], |
|
highlighted: [], |
|
dimensions: [], |
|
dimensionTitles: {}, |
|
dimensionTitleRotation: 0, |
|
types: {}, |
|
brushed: false, |
|
mode: "default", |
|
rate: 20, |
|
width: 600, |
|
height: 300, |
|
margin: { top: 30, right: 0, bottom: 12, left: 0 }, |
|
color: "#069", |
|
composite: "source-over", |
|
alpha: 0.7, |
|
bundlingStrength: 0.5, |
|
bundleDimension: null, |
|
smoothness: 0.25, |
|
showControlPoints: false, |
|
hideAxis : [] |
|
}; |
|
|
|
extend(__, config); |
|
var pc = function(selection) { |
|
selection = pc.selection = d3.select(selection); |
|
|
|
__.width = selection[0][0].clientWidth; |
|
__.height = selection[0][0].clientHeight; |
|
|
|
// canvas data layers |
|
["shadows", "marks", "foreground", "highlight"].forEach(function(layer) { |
|
canvas[layer] = selection |
|
.append("canvas") |
|
.attr("class", layer)[0][0]; |
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ctx[layer] = canvas[layer].getContext("2d"); |
|
}); |
|
|
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// svg tick and brush layers |
|
pc.svg = selection |
|
.append("svg") |
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.attr("width", __.width) |
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.attr("height", __.height) |
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.append("svg:g") |
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.attr("transform", "translate(" + __.margin.left + "," + __.margin.top + ")"); |
|
|
|
return pc; |
|
}; |
|
var events = d3.dispatch.apply(this,["render", "resize", "highlight", "brush", "brushend", "axesreorder"].concat(d3.keys(__))), |
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w = function() { return __.width - __.margin.right - __.margin.left; }, |
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h = function() { return __.height - __.margin.top - __.margin.bottom; }, |
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flags = { |
|
brushable: false, |
|
reorderable: false, |
|
axes: false, |
|
interactive: false, |
|
shadows: false, |
|
debug: false |
|
}, |
|
xscale = d3.scale.ordinal(), |
|
yscale = {}, |
|
dragging = {}, |
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line = d3.svg.line(), |
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axis = d3.svg.axis().orient("left").ticks(5), |
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g, // groups for axes, brushes |
|
ctx = {}, |
|
canvas = {}, |
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clusterCentroids = []; |
|
|
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// side effects for setters |
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var side_effects = d3.dispatch.apply(this,d3.keys(__)) |
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.on("composite", function(d) { ctx.foreground.globalCompositeOperation = d.value; }) |
|
.on("alpha", function(d) { ctx.foreground.globalAlpha = d.value; }) |
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.on("width", function(d) { pc.resize(); }) |
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.on("height", function(d) { pc.resize(); }) |
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.on("margin", function(d) { pc.resize(); }) |
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.on("rate", function(d) { rqueue.rate(d.value); }) |
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.on("data", function(d) { |
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if (flags.shadows){paths(__.data, ctx.shadows);} |
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}) |
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.on("dimensions", function(d) { |
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xscale.domain(__.dimensions); |
|
if (flags.interactive){pc.render().updateAxes();} |
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}) |
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.on("bundleDimension", function(d) { |
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if (!__.dimensions.length) pc.detectDimensions(); |
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if (!(__.dimensions[0] in yscale)) pc.autoscale(); |
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if (typeof d.value === "number") { |
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if (d.value < __.dimensions.length) { |
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__.bundleDimension = __.dimensions[d.value]; |
|
} else if (d.value < __.hideAxis.length) { |
|
__.bundleDimension = __.hideAxis[d.value]; |
|
} |
|
} else { |
|
__.bundleDimension = d.value; |
|
} |
|
|
|
__.clusterCentroids = compute_cluster_centroids(__.bundleDimension); |
|
}) |
|
.on("hideAxis", function(d) { |
|
if (!__.dimensions.length) pc.detectDimensions(); |
|
pc.dimensions(without(__.dimensions, d.value)); |
|
}); |
|
|
|
// expose the state of the chart |
|
pc.state = __; |
|
pc.flags = flags; |
|
|
|
// create getter/setters |
|
getset(pc, __, events); |
|
|
|
// expose events |
|
d3.rebind(pc, events, "on"); |
|
|
|
// tick formatting |
|
d3.rebind(pc, axis, "ticks", "orient", "tickValues", "tickSubdivide", "tickSize", "tickPadding", "tickFormat"); |
|
|
|
// getter/setter with event firing |
|
function getset(obj,state,events) { |
|
d3.keys(state).forEach(function(key) { |
|
obj[key] = function(x) { |
|
if (!arguments.length) { |
|
return state[key]; |
|
} |
|
var old = state[key]; |
|
state[key] = x; |
|
side_effects[key].call(pc,{"value": x, "previous": old}); |
|
events[key].call(pc,{"value": x, "previous": old}); |
|
return obj; |
|
}; |
|
}); |
|
}; |
|
|
|
function extend(target, source) { |
|
for (key in source) { |
|
target[key] = source[key]; |
|
} |
|
return target; |
|
}; |
|
|
|
function without(arr, item) { |
|
return arr.filter(function(elem) { return item.indexOf(elem) === -1; }) |
|
}; |
|
pc.autoscale = function() { |
|
// yscale |
|
var defaultScales = { |
|
"date": function(k) { |
|
return d3.time.scale() |
|
.domain(d3.extent(__.data, function(d) { |
|
return d[k] ? d[k].getTime() : null; |
|
})) |
|
.range([h()+1, 1]); |
|
}, |
|
"number": function(k) { |
|
return d3.scale.linear() |
|
.domain(d3.extent(__.data, function(d) { return +d[k]; })) |
|
.range([h()+1, 1]); |
|
}, |
|
"string": function(k) { |
|
var counts = {}, |
|
domain = []; |
|
|
|
// Let's get the count for each value so that we can sort the domain based |
|
// on the number of items for each value. |
|
__.data.map(function(p) { |
|
if (counts[p[k]] === undefined) { |
|
counts[p[k]] = 1; |
|
} else { |
|
counts[p[k]] = counts[p[k]] + 1; |
|
} |
|
}); |
|
|
|
domain = Object.getOwnPropertyNames(counts).sort(function(a, b) { |
|
return counts[a] - counts[b]; |
|
}); |
|
|
|
return d3.scale.ordinal() |
|
.domain(domain) |
|
.rangePoints([h()+1, 1]); |
|
} |
|
}; |
|
|
|
__.dimensions.forEach(function(k) { |
|
yscale[k] = defaultScales[__.types[k]](k); |
|
}); |
|
|
|
__.hideAxis.forEach(function(k) { |
|
yscale[k] = defaultScales[__.types[k]](k); |
|
}); |
|
|
|
// hack to remove ordinal dimensions with many values |
|
pc.dimensions(pc.dimensions().filter(function(p,i) { |
|
var uniques = yscale[p].domain().length; |
|
if (__.types[p] == "string" && (uniques > 60 || uniques < 2)) { |
|
return false; |
|
} |
|
return true; |
|
})); |
|
|
|
// xscale |
|
xscale.rangePoints([0, w()], 1); |
|
|
|
// canvas sizes |
|
pc.selection.selectAll("canvas") |
|
.style("margin-top", __.margin.top + "px") |
|
.style("margin-left", __.margin.left + "px") |
|
.attr("width", w()+2) |
|
.attr("height", h()+2); |
|
|
|
// default styles, needs to be set when canvas width changes |
|
ctx.foreground.strokeStyle = __.color; |
|
ctx.foreground.lineWidth = 1.4; |
|
ctx.foreground.globalCompositeOperation = __.composite; |
|
ctx.foreground.globalAlpha = __.alpha; |
|
ctx.highlight.lineWidth = 3; |
|
ctx.shadows.strokeStyle = "#dadada"; |
|
|
|
return this; |
|
}; |
|
|
|
pc.scale = function(d, domain) { |
|
yscale[d].domain(domain); |
|
|
|
return this; |
|
}; |
|
|
|
pc.flip = function(d) { |
|
//yscale[d].domain().reverse(); // does not work |
|
yscale[d].domain(yscale[d].domain().reverse()); // works |
|
|
|
return this; |
|
}; |
|
|
|
pc.commonScale = function(global, type) { |
|
var t = type || "number"; |
|
if (typeof global === 'undefined') { |
|
global = true; |
|
} |
|
|
|
// scales of the same type |
|
var scales = __.dimensions.concat(__.hideAxis).filter(function(p) { |
|
return __.types[p] == t; |
|
}); |
|
|
|
if (global) { |
|
var extent = d3.extent(scales.map(function(p,i) { |
|
return yscale[p].domain(); |
|
}).reduce(function(a,b) { |
|
return a.concat(b); |
|
})); |
|
|
|
scales.forEach(function(d) { |
|
yscale[d].domain(extent); |
|
}); |
|
|
|
} else { |
|
scales.forEach(function(k) { |
|
yscale[k].domain(d3.extent(__.data, function(d) { return +d[k]; })); |
|
}); |
|
} |
|
|
|
// update centroids |
|
if (__.bundleDimension !== null) { |
|
pc.bundleDimension(__.bundleDimension); |
|
} |
|
|
|
return this; |
|
};pc.detectDimensions = function() { |
|
pc.types(pc.detectDimensionTypes(__.data)); |
|
pc.dimensions(d3.keys(pc.types())); |
|
return this; |
|
}; |
|
|
|
// a better "typeof" from this post: http://stackoverflow.com/questions/7390426/better-way-to-get-type-of-a-javascript-variable |
|
pc.toType = function(v) { |
|
return ({}).toString.call(v).match(/\s([a-zA-Z]+)/)[1].toLowerCase(); |
|
}; |
|
|
|
// try to coerce to number before returning type |
|
pc.toTypeCoerceNumbers = function(v) { |
|
if ((parseFloat(v) == v) && (v != null)) { |
|
return "number"; |
|
} |
|
return pc.toType(v); |
|
}; |
|
|
|
// attempt to determine types of each dimension based on first row of data |
|
pc.detectDimensionTypes = function(data) { |
|
var types = {}; |
|
d3.keys(data[0]) |
|
.forEach(function(col) { |
|
types[col] = pc.toTypeCoerceNumbers(data[0][col]); |
|
}); |
|
return types; |
|
}; |
|
pc.render = function() { |
|
// try to autodetect dimensions and create scales |
|
if (!__.dimensions.length) pc.detectDimensions(); |
|
if (!(__.dimensions[0] in yscale)) pc.autoscale(); |
|
|
|
pc.render[__.mode](); |
|
|
|
events.render.call(this); |
|
return this; |
|
}; |
|
|
|
pc.render['default'] = function() { |
|
pc.clear('foreground'); |
|
if (__.brushed) { |
|
__.brushed.forEach(path_foreground); |
|
__.highlighted.forEach(path_highlight); |
|
} else { |
|
__.data.forEach(path_foreground); |
|
__.highlighted.forEach(path_highlight); |
|
} |
|
}; |
|
|
|
var rqueue = d3.renderQueue(path_foreground) |
|
.rate(50) |
|
.clear(function() { |
|
pc.clear('foreground'); |
|
pc.clear('highlight'); |
|
}); |
|
|
|
pc.render.queue = function() { |
|
if (__.brushed) { |
|
rqueue(__.brushed); |
|
__.highlighted.forEach(path_highlight); |
|
} else { |
|
rqueue(__.data); |
|
__.highlighted.forEach(path_highlight); |
|
} |
|
}; |
|
function compute_cluster_centroids(d) { |
|
|
|
var clusterCentroids = d3.map(); |
|
var clusterCounts = d3.map(); |
|
// determine clusterCounts |
|
__.data.forEach(function(row) { |
|
var scaled = yscale[d](row[d]); |
|
if (!clusterCounts.has(scaled)) { |
|
clusterCounts.set(scaled, 0); |
|
} |
|
var count = clusterCounts.get(scaled); |
|
clusterCounts.set(scaled, count + 1); |
|
}); |
|
|
|
__.data.forEach(function(row) { |
|
__.dimensions.map(function(p, i) { |
|
var scaled = yscale[d](row[d]); |
|
if (!clusterCentroids.has(scaled)) { |
|
var map = d3.map(); |
|
clusterCentroids.set(scaled, map); |
|
} |
|
if (!clusterCentroids.get(scaled).has(p)) { |
|
clusterCentroids.get(scaled).set(p, 0); |
|
} |
|
var value = clusterCentroids.get(scaled).get(p); |
|
value += yscale[p](row[p]) / clusterCounts.get(scaled); |
|
clusterCentroids.get(scaled).set(p, value); |
|
}); |
|
}); |
|
|
|
return clusterCentroids; |
|
|
|
} |
|
|
|
function compute_centroids(row) { |
|
var centroids = []; |
|
|
|
var p = __.dimensions; |
|
var cols = p.length; |
|
var a = 0.5; // center between axes |
|
for (var i = 0; i < cols; ++i) { |
|
// centroids on 'real' axes |
|
var x = position(p[i]); |
|
var y = yscale[p[i]](row[p[i]]); |
|
centroids.push([x, y]); |
|
//centroids.push($V([x, y])); |
|
|
|
// centroids on 'virtual' axes |
|
if (i < cols - 1) { |
|
var cx = x + a * (position(p[i+1]) - x); |
|
var cy = y + a * (yscale[p[i+1]](row[p[i+1]]) - y); |
|
if (__.bundleDimension !== null) { |
|
var leftCentroid = __.clusterCentroids.get(yscale[__.bundleDimension](row[__.bundleDimension])).get(p[i]); |
|
var rightCentroid = __.clusterCentroids.get(yscale[__.bundleDimension](row[__.bundleDimension])).get(p[i+1]); |
|
var centroid = 0.5 * (leftCentroid + rightCentroid); |
|
cy = centroid + (1 - __.bundlingStrength) * (cy - centroid); |
|
} |
|
centroids.push([cx, cy]); |
|
//centroids.push($V([cx, cy])); |
|
} |
|
} |
|
|
|
return centroids; |
|
} |
|
|
|
pc.compute_centroids = compute_centroids; |
|
|
|
function compute_control_points(centroids) { |
|
|
|
var cols = centroids.length; |
|
var a = __.smoothness; |
|
var cps = []; |
|
|
|
cps.push(centroids[0]); |
|
cps.push($V([centroids[0].e(1) + a*2*(centroids[1].e(1)-centroids[0].e(1)), centroids[0].e(2)])); |
|
for (var col = 1; col < cols - 1; ++col) { |
|
var mid = centroids[col]; |
|
var left = centroids[col - 1]; |
|
var right = centroids[col + 1]; |
|
|
|
var diff = left.subtract(right); |
|
cps.push(mid.add(diff.x(a))); |
|
cps.push(mid); |
|
cps.push(mid.subtract(diff.x(a))); |
|
} |
|
cps.push($V([centroids[cols-1].e(1) + a*2*(centroids[cols-2].e(1)-centroids[cols-1].e(1)), centroids[cols-1].e(2)])); |
|
cps.push(centroids[cols - 1]); |
|
|
|
return cps; |
|
|
|
};pc.shadows = function() { |
|
flags.shadows = true; |
|
if (__.data.length > 0) { |
|
paths(__.data, ctx.shadows); |
|
} |
|
return this; |
|
}; |
|
|
|
// draw little dots on the axis line where data intersects |
|
pc.axisDots = function() { |
|
var ctx = pc.ctx.marks; |
|
ctx.globalAlpha = d3.min([ 1 / Math.pow(data.length, 1 / 2), 1 ]); |
|
__.data.forEach(function(d) { |
|
__.dimensions.map(function(p, i) { |
|
ctx.fillRect(position(p) - 0.75, yscale[p](d[p]) - 0.75, 1.5, 1.5); |
|
}); |
|
}); |
|
return this; |
|
}; |
|
|
|
// draw single cubic bezier curve |
|
function single_curve(d, ctx) { |
|
|
|
var centroids = compute_centroids(d); |
|
var cps = compute_control_points(centroids); |
|
|
|
ctx.moveTo(cps[0].e(1), cps[0].e(2)); |
|
for (var i = 1; i < cps.length; i += 3) { |
|
if (__.showControlPoints) { |
|
for (var j = 0; j < 3; j++) { |
|
ctx.fillRect(cps[i+j].e(1), cps[i+j].e(2), 2, 2); |
|
} |
|
} |
|
ctx.bezierCurveTo(cps[i].e(1), cps[i].e(2), cps[i+1].e(1), cps[i+1].e(2), cps[i+2].e(1), cps[i+2].e(2)); |
|
} |
|
}; |
|
|
|
// draw single polyline |
|
function color_path(d, i, ctx) { |
|
ctx.strokeStyle = d3.functor(__.color)(d, i); |
|
ctx.beginPath(); |
|
if (__.bundleDimension === null || (__.bundlingStrength === 0 && __.smoothness == 0)) { |
|
single_path(d, ctx); |
|
} else { |
|
single_curve(d, ctx); |
|
} |
|
ctx.stroke(); |
|
}; |
|
|
|
// draw many polylines of the same color |
|
function paths(data, ctx) { |
|
ctx.clearRect(-1, -1, w() + 2, h() + 2); |
|
ctx.beginPath(); |
|
data.forEach(function(d) { |
|
if (__.bundleDimension === null || (__.bundlingStrength === 0 && __.smoothness == 0)) { |
|
single_path(d, ctx); |
|
} else { |
|
single_curve(d, ctx); |
|
} |
|
}); |
|
ctx.stroke(); |
|
}; |
|
|
|
function single_path(d, ctx) { |
|
__.dimensions.map(function(p, i) { |
|
if (i == 0) { |
|
ctx.moveTo(position(p), yscale[p](d[p])); |
|
} else { |
|
ctx.lineTo(position(p), yscale[p](d[p])); |
|
} |
|
}); |
|
} |
|
|
|
function path_foreground(d, i) { |
|
return color_path(d, i, ctx.foreground); |
|
}; |
|
|
|
function path_highlight(d, i) { |
|
return color_path(d, i, ctx.highlight); |
|
}; |
|
pc.clear = function(layer) { |
|
ctx[layer].clearRect(0,0,w()+2,h()+2); |
|
return this; |
|
}; |
|
function flipAxisAndUpdatePCP(dimension, i) { |
|
var g = pc.svg.selectAll(".dimension"); |
|
|
|
pc.flip(dimension); |
|
d3.select(g[0][i]) |
|
.transition() |
|
.duration(1100) |
|
.call(axis.scale(yscale[dimension])); |
|
|
|
pc.render(); |
|
if (flags.shadows) paths(__.data, ctx.shadows); |
|
} |
|
|
|
function rotateLabels() { |
|
var delta = d3.event.deltaY; |
|
delta = delta < 0 ? -5 : delta; |
|
delta = delta > 0 ? 5 : delta; |
|
|
|
__.dimensionTitleRotation += delta; |
|
pc.svg.selectAll("text.label") |
|
.attr("transform", "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")"); |
|
d3.event.preventDefault(); |
|
} |
|
|
|
pc.createAxes = function() { |
|
if (g) pc.removeAxes(); |
|
|
|
// Add a group element for each dimension. |
|
g = pc.svg.selectAll(".dimension") |
|
.data(__.dimensions, function(d) { return d; }) |
|
.enter().append("svg:g") |
|
.attr("class", "dimension") |
|
.attr("transform", function(d) { return "translate(" + xscale(d) + ")"; }); |
|
|
|
// Add an axis and title. |
|
g.append("svg:g") |
|
.attr("class", "axis") |
|
.attr("transform", "translate(0,0)") |
|
.each(function(d) { d3.select(this).call(axis.scale(yscale[d])); }) |
|
.append("svg:text") |
|
.attr({ |
|
"text-anchor": "middle", |
|
"y": 0, |
|
"transform": "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")", |
|
"x": 0, |
|
"class": "label" |
|
}) |
|
.text(function(d) { |
|
return d in __.dimensionTitles ? __.dimensionTitles[d] : d; // dimension display names |
|
}) |
|
.on("dblclick", flipAxisAndUpdatePCP) |
|
.on("wheel", rotateLabels); |
|
|
|
flags.axes= true; |
|
return this; |
|
}; |
|
|
|
pc.removeAxes = function() { |
|
g.remove(); |
|
return this; |
|
}; |
|
|
|
pc.updateAxes = function() { |
|
var g_data = pc.svg.selectAll(".dimension").data(__.dimensions); |
|
|
|
// Enter |
|
g_data.enter().append("svg:g") |
|
.attr("class", "dimension") |
|
.attr("transform", function(p) { return "translate(" + position(p) + ")"; }) |
|
.style("opacity", 0) |
|
.append("svg:g") |
|
.attr("class", "axis") |
|
.attr("transform", "translate(0,0)") |
|
.each(function(d) { d3.select(this).call(axis.scale(yscale[d])); }) |
|
.append("svg:text") |
|
.attr({ |
|
"text-anchor": "middle", |
|
"y": 0, |
|
"transform": "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")", |
|
"x": 0, |
|
"class": "label" |
|
}) |
|
.text(String) |
|
.on("dblclick", flipAxisAndUpdatePCP) |
|
.on("wheel", rotateLabels); |
|
|
|
// Update |
|
g_data.attr("opacity", 0); |
|
g_data.select(".axis") |
|
.transition() |
|
.duration(1100) |
|
.each(function(d) { |
|
d3.select(this).call(axis.scale(yscale[d])); |
|
}); |
|
g_data.select(".label") |
|
.transition() |
|
.duration(1100) |
|
.text(String) |
|
.attr("transform", "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")"); |
|
|
|
// Exit |
|
g_data.exit().remove(); |
|
|
|
g = pc.svg.selectAll(".dimension"); |
|
g.transition().duration(1100) |
|
.attr("transform", function(p) { return "translate(" + position(p) + ")"; }) |
|
.style("opacity", 1); |
|
|
|
pc.svg.selectAll(".axis") |
|
.transition() |
|
.duration(1100) |
|
.each(function(d) { d3.select(this).call(axis.scale(yscale[d])); }); |
|
|
|
if (flags.shadows) paths(__.data, ctx.shadows); |
|
if (flags.brushable) pc.brushable(); |
|
if (flags.reorderable) pc.reorderable(); |
|
if (pc.brushMode() !== "None") { |
|
var mode = pc.brushMode(); |
|
pc.brushMode("None"); |
|
pc.brushMode(mode); |
|
} |
|
return this; |
|
}; |
|
|
|
// Jason Davies, http://bl.ocks.org/1341281 |
|
pc.reorderable = function() { |
|
if (!g) pc.createAxes(); |
|
|
|
// Keep track of the order of the axes to verify if the order has actually |
|
// changed after a drag ends. Changed order might have consequence (e.g. |
|
// strums that need to be reset). |
|
var dimsAtDragstart; |
|
|
|
g.style("cursor", "move") |
|
.call(d3.behavior.drag() |
|
.on("dragstart", function(d) { |
|
dragging[d] = this.__origin__ = xscale(d); |
|
dimsAtDragstart = __.dimensions.slice(); |
|
}) |
|
.on("drag", function(d) { |
|
dragging[d] = Math.min(w(), Math.max(0, this.__origin__ += d3.event.dx)); |
|
__.dimensions.sort(function(a, b) { return position(a) - position(b); }); |
|
xscale.domain(__.dimensions); |
|
pc.render(); |
|
g.attr("transform", function(d) { return "translate(" + position(d) + ")"; }); |
|
}) |
|
.on("dragend", function(d, i) { |
|
// Let's see if the order has changed and send out an event if so. |
|
var j = __.dimensions.indexOf(d), |
|
parent = this.parentElement; |
|
|
|
if (i !== j) { |
|
events.axesreorder.call(pc, __.dimensions); |
|
// We now also want to reorder the actual dom elements that represent |
|
// the axes. That is, the g.dimension elements. If we don't do this, |
|
// we get a weird and confusing transition when updateAxes is called. |
|
// This is due to the fact that, initially the nth g.dimension element |
|
// represents the nth axis. However, after a manual reordering, |
|
// without reordering the dom elements, the nth dom elements no longer |
|
// necessarily represents the nth axis. |
|
// |
|
// i is the original index of the dom element |
|
// j is the new index of the dom element |
|
parent.insertBefore(this, parent.children[j + 1]) |
|
} |
|
|
|
delete this.__origin__; |
|
delete dragging[d]; |
|
d3.select(this).transition().attr("transform", "translate(" + xscale(d) + ")"); |
|
pc.render(); |
|
if (flags.shadows) paths(__.data, ctx.shadows); |
|
})); |
|
flags.reorderable = true; |
|
return this; |
|
}; |
|
|
|
// pairs of adjacent dimensions |
|
pc.adjacent_pairs = function(arr) { |
|
var ret = []; |
|
for (var i = 0; i < arr.length-1; i++) { |
|
ret.push([arr[i],arr[i+1]]); |
|
}; |
|
return ret; |
|
}; |
|
|
|
var brush = { |
|
modes: { |
|
"None": { |
|
install: function(pc) {}, // Nothing to be done. |
|
uninstall: function(pc) {}, // Nothing to be done. |
|
selected: function() { return []; } // Nothing to return |
|
} |
|
}, |
|
mode: "None", |
|
predicate: "AND", |
|
currentMode: function() { |
|
return this.modes[this.mode]; |
|
} |
|
}; |
|
|
|
// This function can be used for 'live' updates of brushes. That is, during the |
|
// specification of a brush, this method can be called to update the view. |
|
// |
|
// @param newSelection - The new set of data items that is currently contained |
|
// by the brushes |
|
function brushUpdated(newSelection) { |
|
__.brushed = newSelection; |
|
events.brush.call(pc,__.brushed); |
|
pc.render(); |
|
} |
|
|
|
function brushPredicate(predicate) { |
|
if (!arguments.length) { return brush.predicate; } |
|
|
|
predicate = String(predicate).toUpperCase(); |
|
if (predicate !== "AND" && predicate !== "OR") { |
|
throw "Invalid predicate " + predicate; |
|
} |
|
|
|
brush.predicate = predicate; |
|
__.brushed = brush.currentMode().selected(); |
|
pc.render(); |
|
return pc; |
|
} |
|
|
|
pc.brushModes = function() { |
|
return Object.getOwnPropertyNames(brush.modes); |
|
}; |
|
|
|
pc.brushMode = function(mode) { |
|
if (arguments.length === 0) { |
|
return brush.mode; |
|
} |
|
|
|
if (pc.brushModes().indexOf(mode) === -1) { |
|
throw "pc.brushmode: Unsupported brush mode: " + mode; |
|
} |
|
|
|
// Make sure that we don't trigger unnecessary events by checking if the mode |
|
// actually changes. |
|
if (mode !== brush.mode) { |
|
// When changing brush modes, the first thing we need to do is clearing any |
|
// brushes from the current mode, if any. |
|
if (brush.mode !== "None") { |
|
pc.brushReset(); |
|
} |
|
|
|
// Next, we need to 'uninstall' the current brushMode. |
|
brush.modes[brush.mode].uninstall(pc); |
|
// Finally, we can install the requested one. |
|
brush.mode = mode; |
|
brush.modes[brush.mode].install(); |
|
if (mode === "None") { |
|
delete pc.brushPredicate; |
|
} else { |
|
pc.brushPredicate = brushPredicate; |
|
} |
|
} |
|
|
|
return pc; |
|
}; |
|
|
|
// brush mode: 1D-Axes |
|
|
|
(function() { |
|
var brushes = {}; |
|
|
|
function is_brushed(p) { |
|
return !brushes[p].empty(); |
|
} |
|
|
|
// data within extents |
|
function selected() { |
|
var actives = __.dimensions.filter(is_brushed), |
|
extents = actives.map(function(p) { return brushes[p].extent(); }); |
|
|
|
// We don't want to return the full data set when there are no axes brushed. |
|
// Actually, when there are no axes brushed, by definition, no items are |
|
// selected. So, let's avoid the filtering and just return false. |
|
//if (actives.length === 0) return false; |
|
|
|
// Resolves broken examples for now. They expect to get the full dataset back from empty brushes |
|
if (actives.length === 0) return __.data; |
|
|
|
// test if within range |
|
var within = { |
|
"date": function(d,p,dimension) { |
|
return extents[dimension][0] <= d[p] && d[p] <= extents[dimension][1] |
|
}, |
|
"number": function(d,p,dimension) { |
|
return extents[dimension][0] <= d[p] && d[p] <= extents[dimension][1] |
|
}, |
|
"string": function(d,p,dimension) { |
|
return extents[dimension][0] <= yscale[p](d[p]) && yscale[p](d[p]) <= extents[dimension][1] |
|
} |
|
}; |
|
|
|
return __.data |
|
.filter(function(d) { |
|
switch(brush.predicate) { |
|
case "AND": |
|
return actives.every(function(p, dimension) { |
|
return within[__.types[p]](d,p,dimension); |
|
}); |
|
case "OR": |
|
return actives.some(function(p, dimension) { |
|
return within[__.types[p]](d,p,dimension); |
|
}); |
|
default: |
|
throw "Unknown brush predicate " + __.brushPredicate; |
|
} |
|
}); |
|
}; |
|
|
|
function brushExtents() { |
|
var extents = {}; |
|
__.dimensions.forEach(function(d) { |
|
var brush = brushes[d]; |
|
if (!brush.empty()) { |
|
var extent = brush.extent(); |
|
extent.sort(d3.ascending); |
|
extents[d] = extent; |
|
} |
|
}); |
|
return extents; |
|
} |
|
|
|
function brushFor(axis) { |
|
var brush = d3.svg.brush(); |
|
|
|
brush |
|
.y(yscale[axis]) |
|
.on("brushstart", function() { d3.event.sourceEvent.stopPropagation() }) |
|
.on("brush", function() { |
|
brushUpdated(selected()); |
|
}) |
|
.on("brushend", function() { |
|
events.brushend.call(pc, __.brushed); |
|
}); |
|
|
|
brushes[axis] = brush; |
|
return brush; |
|
} |
|
|
|
function brushReset(dimension) { |
|
__.brushed = false; |
|
if (g) { |
|
g.selectAll('.brush') |
|
.each(function(d) { |
|
d3.select(this).call( |
|
brushes[d].clear() |
|
); |
|
}); |
|
pc.render(); |
|
} |
|
return this; |
|
}; |
|
|
|
function install() { |
|
if (!g) pc.createAxes(); |
|
|
|
// Add and store a brush for each axis. |
|
g.append("svg:g") |
|
.attr("class", "brush") |
|
.each(function(d) { |
|
d3.select(this).call(brushFor(d)); |
|
}) |
|
.selectAll("rect") |
|
.style("visibility", null) |
|
.attr("x", -15) |
|
.attr("width", 30); |
|
|
|
pc.brushExtents = brushExtents; |
|
pc.brushReset = brushReset; |
|
return pc; |
|
} |
|
|
|
brush.modes["1D-axes"] = { |
|
install: install, |
|
uninstall: function() { |
|
g.selectAll(".brush").remove(); |
|
brushes = {}; |
|
delete pc.brushExtents; |
|
delete pc.brushReset; |
|
}, |
|
selected: selected |
|
} |
|
})(); |
|
// brush mode: 2D-strums |
|
// bl.ocks.org/syntagmatic/5441022 |
|
|
|
(function() { |
|
var strums = {}, |
|
strumRect; |
|
|
|
function drawStrum(strum, activePoint) { |
|
var svg = pc.selection.select("svg").select("g#strums"), |
|
id = strum.dims.i, |
|
points = [strum.p1, strum.p2], |
|
line = svg.selectAll("line#strum-" + id).data([strum]), |
|
circles = svg.selectAll("circle#strum-" + id).data(points), |
|
drag = d3.behavior.drag(); |
|
|
|
line.enter() |
|
.append("line") |
|
.attr("id", "strum-" + id) |
|
.attr("class", "strum"); |
|
|
|
line |
|
.attr("x1", function(d) { return d.p1[0]; }) |
|
.attr("y1", function(d) { return d.p1[1]; }) |
|
.attr("x2", function(d) { return d.p2[0]; }) |
|
.attr("y2", function(d) { return d.p2[1]; }) |
|
.attr("stroke", "black") |
|
.attr("stroke-width", 2); |
|
|
|
drag |
|
.on("drag", function(d, i) { |
|
var ev = d3.event; |
|
i = i + 1; |
|
strum["p" + i][0] = Math.min(Math.max(strum.minX + 1, ev.x), strum.maxX); |
|
strum["p" + i][1] = Math.min(Math.max(strum.minY, ev.y), strum.maxY); |
|
drawStrum(strum, i - 1); |
|
}) |
|
.on("dragend", onDragEnd()); |
|
|
|
circles.enter() |
|
.append("circle") |
|
.attr("id", "strum-" + id) |
|
.attr("class", "strum"); |
|
|
|
circles |
|
.attr("cx", function(d) { return d[0]; }) |
|
.attr("cy", function(d) { return d[1]; }) |
|
.attr("r", 5) |
|
.style("opacity", function(d, i) { |
|
return (activePoint !== undefined && i === activePoint) ? 0.8 : 0; |
|
}) |
|
.on("mouseover", function() { |
|
d3.select(this).style("opacity", 0.8); |
|
}) |
|
.on("mouseout", function() { |
|
d3.select(this).style("opacity", 0); |
|
}) |
|
.call(drag); |
|
} |
|
|
|
function dimensionsForPoint(p) { |
|
var dims = { i: -1, left: undefined, right: undefined }; |
|
__.dimensions.some(function(dim, i) { |
|
if (xscale(dim) < p[0]) { |
|
var next = __.dimensions[i + 1]; |
|
dims.i = i; |
|
dims.left = dim; |
|
dims.right = next; |
|
return false; |
|
} |
|
return true; |
|
}); |
|
|
|
if (dims.left === undefined) { |
|
// Event on the left side of the first axis. |
|
dims.i = 0; |
|
dims.left = __.dimensions[0]; |
|
dims.right = __.dimensions[1]; |
|
} else if (dims.right === undefined) { |
|
// Event on the right side of the last axis |
|
dims.i = __.dimensions.length - 1; |
|
dims.right = dims.left; |
|
dims.left = __.dimensions[__.dimensions.length - 2]; |
|
} |
|
|
|
return dims; |
|
} |
|
|
|
function onDragStart() { |
|
// First we need to determine between which two axes the sturm was started. |
|
// This will determine the freedom of movement, because a strum can |
|
// logically only happen between two axes, so no movement outside these axes |
|
// should be allowed. |
|
return function() { |
|
var p = d3.mouse(strumRect[0][0]), |
|
dims = dimensionsForPoint(p), |
|
strum = { |
|
p1: p, |
|
dims: dims, |
|
minX: xscale(dims.left), |
|
maxX: xscale(dims.right), |
|
minY: 0, |
|
maxY: h() |
|
}; |
|
|
|
strums[dims.i] = strum; |
|
strums.active = dims.i; |
|
|
|
// Make sure that the point is within the bounds |
|
strum.p1[0] = Math.min(Math.max(strum.minX, p[0]), strum.maxX); |
|
strum.p1[1] = p[1] - __.margin.top; |
|
strum.p2 = strum.p1.slice(); |
|
}; |
|
} |
|
|
|
function onDrag() { |
|
return function() { |
|
var ev = d3.event, |
|
strum = strums[strums.active]; |
|
|
|
// Make sure that the point is within the bounds |
|
strum.p2[0] = Math.min(Math.max(strum.minX + 1, ev.x), strum.maxX); |
|
strum.p2[1] = Math.min(Math.max(strum.minY, ev.y - __.margin.top), strum.maxY); |
|
drawStrum(strum, 1); |
|
}; |
|
} |
|
|
|
function containmentTest(strum, width) { |
|
var p1 = [strum.p1[0] - strum.minX, strum.p1[1] - strum.minX], |
|
p2 = [strum.p2[0] - strum.minX, strum.p2[1] - strum.minX], |
|
m1 = 1 - width / p1[0], |
|
b1 = p1[1] * (1 - m1), |
|
m2 = 1 - width / p2[0], |
|
b2 = p2[1] * (1 - m2); |
|
|
|
// test if point falls between lines |
|
return function(p) { |
|
var x = p[0], |
|
y = p[1], |
|
y1 = m1 * x + b1, |
|
y2 = m2 * x + b2; |
|
|
|
if (y > Math.min(y1, y2) && y < Math.max(y1, y2)) { |
|
return true; |
|
} |
|
|
|
return false; |
|
}; |
|
} |
|
|
|
function selected() { |
|
var ids = Object.getOwnPropertyNames(strums), |
|
brushed = __.data; |
|
|
|
// Get the ids of the currently active strums. |
|
ids = ids.filter(function(d) { |
|
return !isNaN(d); |
|
}); |
|
|
|
function crossesStrum(d, id) { |
|
var strum = strums[id], |
|
test = containmentTest(strum, strums.width(id)), |
|
d1 = strum.dims.left, |
|
d2 = strum.dims.right, |
|
y1 = yscale[d1], |
|
y2 = yscale[d2], |
|
point = [y1(d[d1]) - strum.minX, y2(d[d2]) - strum.minX]; |
|
return test(point); |
|
} |
|
|
|
if (ids.length === 0) { return brushed; } |
|
|
|
return brushed.filter(function(d) { |
|
switch(brush.predicate) { |
|
case "AND": |
|
return ids.every(function(id) { return crossesStrum(d, id); }); |
|
case "OR": |
|
return ids.some(function(id) { return crossesStrum(d, id); }); |
|
default: |
|
throw "Unknown brush predicate " + __.brushPredicate; |
|
} |
|
}); |
|
} |
|
|
|
function removeStrum() { |
|
var strum = strums[strums.active], |
|
svg = pc.selection.select("svg").select("g#strums"); |
|
|
|
delete strums[strums.active]; |
|
strums.active = undefined; |
|
svg.selectAll("line#strum-" + strum.dims.i).remove(); |
|
svg.selectAll("circle#strum-" + strum.dims.i).remove(); |
|
} |
|
|
|
function onDragEnd() { |
|
return function() { |
|
var brushed = __.data, |
|
strum = strums[strums.active]; |
|
|
|
// Okay, somewhat unexpected, but not totally unsurprising, a mousclick is |
|
// considered a drag without move. So we have to deal with that case |
|
if (strum && strum.p1[0] === strum.p2[0] && strum.p1[1] === strum.p2[1]) { |
|
removeStrum(strums); |
|
} |
|
|
|
brushed = selected(strums); |
|
strums.active = undefined; |
|
__.brushed = brushed; |
|
pc.render(); |
|
events.brushend.call(pc, __.brushed); |
|
}; |
|
} |
|
|
|
function brushReset(strums) { |
|
return function() { |
|
var ids = Object.getOwnPropertyNames(strums).filter(function(d) { |
|
return !isNaN(d); |
|
}); |
|
|
|
ids.forEach(function(d) { |
|
strums.active = d; |
|
removeStrum(strums); |
|
}); |
|
onDragEnd(strums)(); |
|
}; |
|
} |
|
|
|
function install() { |
|
var drag = d3.behavior.drag(); |
|
|
|
// Map of current strums. Strums are stored per segment of the PC. A segment, |
|
// being the area between two axes. The left most area is indexed at 0. |
|
strums.active = undefined; |
|
// Returns the width of the PC segment where currently a strum is being |
|
// placed. NOTE: even though they are evenly spaced in our current |
|
// implementation, we keep for when non-even spaced segments are supported as |
|
// well. |
|
strums.width = function(id) { |
|
var strum = strums[id]; |
|
|
|
if (strum === undefined) { |
|
return undefined; |
|
} |
|
|
|
return strum.maxX - strum.minX; |
|
}; |
|
|
|
pc.on("axesreorder.strums", function() { |
|
var ids = Object.getOwnPropertyNames(strums).filter(function(d) { |
|
return !isNaN(d); |
|
}); |
|
|
|
// Checks if the first dimension is directly left of the second dimension. |
|
function consecutive(first, second) { |
|
var length = __.dimensions.length; |
|
return __.dimensions.some(function(d, i) { |
|
return (d === first) |
|
? i + i < length && __.dimensions[i + 1] === second |
|
: false; |
|
}); |
|
} |
|
|
|
if (ids.length > 0) { // We have some strums, which might need to be removed. |
|
ids.forEach(function(d) { |
|
var dims = strums[d].dims; |
|
strums.active = d; |
|
// If the two dimensions of the current strum are not next to each other |
|
// any more, than we'll need to remove the strum. Otherwise we keep it. |
|
if (!consecutive(dims.left, dims.right)) { |
|
removeStrum(strums); |
|
} |
|
}); |
|
onDragEnd(strums)(); |
|
} |
|
}); |
|
|
|
// Add a new svg group in which we draw the strums. |
|
pc.selection.select("svg").append("g") |
|
.attr("id", "strums") |
|
.attr("transform", "translate(" + __.margin.left + "," + __.margin.top + ")"); |
|
|
|
// Install the required brushReset function |
|
pc.brushReset = brushReset(strums); |
|
|
|
drag |
|
.on("dragstart", onDragStart(strums)) |
|
.on("drag", onDrag(strums)) |
|
.on("dragend", onDragEnd(strums)); |
|
|
|
// NOTE: The styling needs to be done here and not in the css. This is because |
|
// for 1D brushing, the canvas layers should not listen to |
|
// pointer-events. |
|
strumRect = pc.selection.select("svg").insert("rect", "g#strums") |
|
.attr("id", "strum-events") |
|
.attr("x", __.margin.left) |
|
.attr("y", __.margin.top) |
|
.attr("width", w()) |
|
.attr("height", h() + 2) |
|
.style("opacity", 0) |
|
.call(drag); |
|
} |
|
|
|
brush.modes["2D-strums"] = { |
|
install: install, |
|
uninstall: function() { |
|
pc.selection.select("svg").select("g#strums").remove(); |
|
pc.selection.select("svg").select("rect#strum-events").remove(); |
|
pc.on("axesreorder.strums", undefined); |
|
delete pc.brushReset; |
|
|
|
strumRect = undefined; |
|
}, |
|
selected: selected |
|
}; |
|
|
|
}()); |
|
|
|
pc.interactive = function() { |
|
flags.interactive = true; |
|
return this; |
|
}; |
|
|
|
// expose a few objects |
|
pc.xscale = xscale; |
|
pc.yscale = yscale; |
|
pc.ctx = ctx; |
|
pc.canvas = canvas; |
|
pc.g = function() { return g; }; |
|
|
|
// rescale for height, width and margins |
|
// TODO currently assumes chart is brushable, and destroys old brushes |
|
pc.resize = function() { |
|
// selection size |
|
pc.selection.select("svg") |
|
.attr("width", __.width) |
|
.attr("height", __.height) |
|
pc.svg.attr("transform", "translate(" + __.margin.left + "," + __.margin.top + ")"); |
|
|
|
// FIXME: the current brush state should pass through |
|
if (flags.brushable) pc.brushReset(); |
|
|
|
// scales |
|
pc.autoscale(); |
|
|
|
// axes, destroys old brushes. |
|
if (g) pc.createAxes(); |
|
if (flags.shadows) paths(__.data, ctx.shadows); |
|
if (flags.brushable) pc.brushable(); |
|
if (flags.reorderable) pc.reorderable(); |
|
|
|
events.resize.call(this, {width: __.width, height: __.height, margin: __.margin}); |
|
return this; |
|
}; |
|
|
|
// highlight an array of data |
|
pc.highlight = function(data) { |
|
if (arguments.length === 0) { |
|
return __.highlighted; |
|
} |
|
|
|
__.highlighted = data; |
|
pc.clear("highlight"); |
|
d3.select(canvas.foreground).classed("faded", true); |
|
data.forEach(path_highlight); |
|
events.highlight.call(this, data); |
|
return this; |
|
}; |
|
|
|
// clear highlighting |
|
pc.unhighlight = function() { |
|
__.highlighted = []; |
|
pc.clear("highlight"); |
|
d3.select(canvas.foreground).classed("faded", false); |
|
return this; |
|
}; |
|
|
|
// calculate 2d intersection of line a->b with line c->d |
|
// points are objects with x and y properties |
|
pc.intersection = function(a, b, c, d) { |
|
return { |
|
x: ((a.x * b.y - a.y * b.x) * (c.x - d.x) - (a.x - b.x) * (c.x * d.y - c.y * d.x)) / ((a.x - b.x) * (c.y - d.y) - (a.y - b.y) * (c.x - d.x)), |
|
y: ((a.x * b.y - a.y * b.x) * (c.y - d.y) - (a.y - b.y) * (c.x * d.y - c.y * d.x)) / ((a.x - b.x) * (c.y - d.y) - (a.y - b.y) * (c.x - d.x)) |
|
}; |
|
}; |
|
|
|
function position(d) { |
|
var v = dragging[d]; |
|
return v == null ? xscale(d) : v; |
|
} |
|
pc.version = "0.5.0"; |
|
// this descriptive text should live with other introspective methods |
|
pc.toString = function() { return "Parallel Coordinates: " + __.dimensions.length + " dimensions (" + d3.keys(__.data[0]).length + " total) , " + __.data.length + " rows"; }; |
|
|
|
return pc; |
|
}; |
|
|
|
d3.renderQueue = (function(func) { |
|
var _queue = [], // data to be rendered |
|
_rate = 10, // number of calls per frame |
|
_clear = function() {}, // clearing function |
|
_i = 0; // current iteration |
|
|
|
var rq = function(data) { |
|
if (data) rq.data(data); |
|
rq.invalidate(); |
|
_clear(); |
|
rq.render(); |
|
}; |
|
|
|
rq.render = function() { |
|
_i = 0; |
|
var valid = true; |
|
rq.invalidate = function() { valid = false; }; |
|
|
|
function doFrame() { |
|
if (!valid) return true; |
|
if (_i > _queue.length) return true; |
|
|
|
// Typical d3 behavior is to pass a data item *and* its index. As the |
|
// render queue splits the original data set, we'll have to be slightly |
|
// more carefull about passing the correct index with the data item. |
|
var end = Math.min(_i + _rate, _queue.length); |
|
for (var i = _i; i < end; i++) { |
|
func(_queue[i], i); |
|
} |
|
_i += _rate; |
|
} |
|
|
|
d3.timer(doFrame); |
|
}; |
|
|
|
rq.data = function(data) { |
|
rq.invalidate(); |
|
_queue = data.slice(0); |
|
return rq; |
|
}; |
|
|
|
rq.rate = function(value) { |
|
if (!arguments.length) return _rate; |
|
_rate = value; |
|
return rq; |
|
}; |
|
|
|
rq.remaining = function() { |
|
return _queue.length - _i; |
|
}; |
|
|
|
// clear the canvas |
|
rq.clear = function(func) { |
|
if (!arguments.length) { |
|
_clear(); |
|
return rq; |
|
} |
|
_clear = func; |
|
return rq; |
|
}; |
|
|
|
rq.invalidate = function() {}; |
|
|
|
return rq; |
|
}); |
|
|
