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d3.parcoords.js
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d3.parcoords.js
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d3.parcoords = function(config) {
var __ = {
data: [],
highlighted: [],
dimensions: {},
dimensionTitleRotation: 0,
brushed: false,
brushedColor: null,
alphaOnBrushed: 0.0,
mode: "default",
rate: 20,
width: 600,
height: 300,
margin: { top: 24, right: 0, bottom: 12, left: 0 },
nullValueSeparator: "undefined", // set to "top" or "bottom"
nullValueSeparatorPadding: { top: 8, right: 0, bottom: 8, left: 0 },
color: "#069",
composite: "source-over",
alpha: 0.7,
bundlingStrength: 0.5,
bundleDimension: null,
smoothness: 0.0,
showControlPoints: false,
hideAxis : [],
flipAxes: [],
animationTime: 1100, // How long it takes to flip the axis when you double click
rotateLabels: false
};
extend(__, config);
if (config && config.dimensionTitles) {
console.warn("dimensionTitles passed in config is deprecated. Add title to dimension object.");
d3.entries(config.dimensionTitles).forEach(function(d) {
if (__.dimensions[d.key]) {
__.dimensions[d.key].title = __.dimensions[d.key].title ? __.dimensions[d.key].title : d.value;
} else {
__.dimensions[d.key] = {
title: d.value
};
}
});
}
var pc = function(selection) {
selection = pc.selection = d3.select(selection);
__.width = selection[0][0].clientWidth;
__.height = selection[0][0].clientHeight;
// canvas data layers
["marks", "foreground", "brushed", "highlight"].forEach(function(layer) {
canvas[layer] = selection
.append("canvas")
.attr("class", layer)[0][0];
ctx[layer] = canvas[layer].getContext("2d");
});
// svg tick and brush layers
pc.svg = selection
.append("svg")
.attr("width", __.width)
.attr("height", __.height)
.style("font", "14px sans-serif")
.style("position", "absolute")
.append("svg:g")
.attr("transform", "translate(" + __.margin.left + "," + __.margin.top + ")");
return pc;
};
var events = d3.dispatch.apply(this,["render", "resize", "highlight", "brush", "brushend", "brushstart", "axesreorder"].concat(d3.keys(__))),
w = function() { return __.width - __.margin.right - __.margin.left; },
h = function() { return __.height - __.margin.top - __.margin.bottom; },
flags = {
brushable: false,
reorderable: false,
axes: false,
interactive: false,
debug: false
},
xscale = d3.scale.ordinal(),
dragging = {},
line = d3.svg.line(),
axis = d3.svg.axis().orient("left").ticks(5),
g, // groups for axes, brushes
ctx = {},
canvas = {},
clusterCentroids = [];
// side effects for setters
var side_effects = d3.dispatch.apply(this,d3.keys(__))
.on("composite", function(d) {
ctx.foreground.globalCompositeOperation = d.value;
ctx.brushed.globalCompositeOperation = d.value;
})
.on("alpha", function(d) {
ctx.foreground.globalAlpha = d.value;
ctx.brushed.globalAlpha = d.value;
})
.on("brushedColor", function (d) {
ctx.brushed.strokeStyle = d.value;
})
.on("width", function(d) { pc.resize(); })
.on("height", function(d) { pc.resize(); })
.on("margin", function(d) { pc.resize(); })
.on("rate", function(d) {
brushedQueue.rate(d.value);
foregroundQueue.rate(d.value);
})
.on("dimensions", function(d) {
__.dimensions = pc.applyDimensionDefaults(d3.keys(d.value));
xscale.domain(pc.getOrderedDimensionKeys());
pc.sortDimensions();
if (flags.interactive){pc.render().updateAxes();}
})
.on("bundleDimension", function(d) {
if (!d3.keys(__.dimensions).length) pc.detectDimensions();
pc.autoscale();
if (typeof d.value === "number") {
if (d.value < d3.keys(__.dimensions).length) {
__.bundleDimension = __.dimensions[d.value];
} else if (d.value < __.hideAxis.length) {
__.bundleDimension = __.hideAxis[d.value];
}
} else {
__.bundleDimension = d.value;
}
__.clusterCentroids = compute_cluster_centroids(__.bundleDimension);
if (flags.interactive){pc.render();}
})
.on("hideAxis", function(d) {
pc.dimensions(pc.applyDimensionDefaults());
pc.dimensions(without(__.dimensions, d.value));
})
.on("flipAxes", function(d) {
if (d.value && d.value.length) {
d.value.forEach(function(axis) {
flipAxisAndUpdatePCP(axis);
});
pc.updateAxes(0);
}
});
// expose the state of the chart
pc.state = __;
pc.flags = flags;
// create getter/setters
getset(pc, __, events);
// expose events
d3.rebind(pc, events, "on");
// 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];
}
if (key === 'dimensions' && Object.prototype.toString.call(x) === '[object Array]') {
console.warn("pc.dimensions([]) is deprecated, use pc.dimensions({})");
x = pc.applyDimensionDefaults(x);
}
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 (var key in source) {
target[key] = source[key];
}
return target;
};
function without(arr, items) {
items.forEach(function (el) {
delete arr[el];
});
return arr;
};
/** adjusts an axis' default range [h()+1, 1] if a NullValueSeparator is set */
function getRange() {
if (__.nullValueSeparator=="bottom") {
return [h()+1-__.nullValueSeparatorPadding.bottom-__.nullValueSeparatorPadding.top, 1];
} else if (__.nullValueSeparator=="top") {
return [h()+1, 1+__.nullValueSeparatorPadding.bottom+__.nullValueSeparatorPadding.top];
}
return [h()+1, 1];
};
pc.autoscale = function() {
// yscale
var defaultScales = {
"date": function(k) {
var extent = d3.extent(__.data, function(d) {
return d[k] ? d[k].getTime() : null;
});
// special case if single value
if (extent[0] === extent[1]) {
return d3.scale.ordinal()
.domain([extent[0]])
.rangePoints(getRange());
}
return d3.time.scale()
.domain(extent)
.range(getRange());
},
"number": function(k) {
var extent = d3.extent(__.data, function(d) { return +d[k]; });
// special case if single value
if (extent[0] === extent[1]) {
return d3.scale.ordinal()
.domain([extent[0]])
.rangePoints(getRange());
}
return d3.scale.linear()
.domain(extent)
.range(getRange());
},
"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 (p[k] === undefined && __.nullValueSeparator!== "undefined"){
return; // null values will be drawn beyond the horizontal null value separator!
}
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(getRange());
}
};
d3.keys(__.dimensions).forEach(function(k) {
if (!__.dimensions[k].yscale){
__.dimensions[k].yscale = defaultScales[__.dimensions[k].type](k);
}
});
// xscale
xscale.rangePoints([0, w()], 1);
// Retina display, etc.
var devicePixelRatio = window.devicePixelRatio || 1;
// canvas sizes
pc.selection.selectAll("canvas")
.style("margin-top", __.margin.top + "px")
.style("margin-left", __.margin.left + "px")
.style("width", (w()+2) + "px")
.style("height", (h()+2) + "px")
.attr("width", (w()+2) * devicePixelRatio)
.attr("height", (h()+2) * devicePixelRatio);
// 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.foreground.scale(devicePixelRatio, devicePixelRatio);
ctx.brushed.strokeStyle = __.brushedColor;
ctx.brushed.lineWidth = 1.4;
ctx.brushed.globalCompositeOperation = __.composite;
ctx.brushed.globalAlpha = __.alpha;
ctx.brushed.scale(devicePixelRatio, devicePixelRatio);
ctx.highlight.lineWidth = 3;
ctx.highlight.scale(devicePixelRatio, devicePixelRatio);
return this;
};
pc.scale = function(d, domain) {
__.dimensions[d].yscale.domain(domain);
return this;
};
pc.flip = function(d) {
//__.dimensions[d].yscale.domain().reverse(); // does not work
__.dimensions[d].yscale.domain(__.dimensions[d].yscale.domain().reverse()); // works
return this;
};
pc.commonScale = function(global, type) {
var t = type || "number";
if (typeof global === 'undefined') {
global = true;
}
// try to autodetect dimensions and create scales
if (!d3.keys(__.dimensions).length) {
pc.detectDimensions()
}
pc.autoscale();
// scales of the same type
var scales = d3.keys(__.dimensions).filter(function(p) {
return __.dimensions[p].type == t;
});
if (global) {
var extent = d3.extent(scales.map(function(d,i) {
return __.dimensions[d].yscale.domain();
}).reduce(function(a,b) {
return a.concat(b);
}));
scales.forEach(function(d) {
__.dimensions[d].yscale.domain(extent);
});
} else {
scales.forEach(function(d) {
__.dimensions[d].yscale.domain(d3.extent(__.data, function(d) { return +d[k]; }));
});
}
// update centroids
if (__.bundleDimension !== null) {
pc.bundleDimension(__.bundleDimension);
}
return this;
};
pc.detectDimensions = function() {
pc.dimensions(pc.applyDimensionDefaults());
return this;
};
pc.applyDimensionDefaults = function(dims) {
var types = pc.detectDimensionTypes(__.data);
dims = dims ? dims : d3.keys(types);
var newDims = {};
var currIndex = 0;
dims.forEach(function(k) {
newDims[k] = __.dimensions[k] ? __.dimensions[k] : {};
//Set up defaults
newDims[k].orient= newDims[k].orient ? newDims[k].orient : 'left';
newDims[k].ticks= newDims[k].ticks != null ? newDims[k].ticks : 5;
newDims[k].innerTickSize= newDims[k].innerTickSize != null ? newDims[k].innerTickSize : 6;
newDims[k].outerTickSize= newDims[k].outerTickSize != null ? newDims[k].outerTickSize : 0;
newDims[k].tickPadding= newDims[k].tickPadding != null ? newDims[k].tickPadding : 3;
newDims[k].type= newDims[k].type ? newDims[k].type : types[k];
newDims[k].index = newDims[k].index != null ? newDims[k].index : currIndex;
currIndex++;
});
return newDims;
};
pc.getOrderedDimensionKeys = function(){
return d3.keys(__.dimensions).sort(function(x, y){
return d3.ascending(__.dimensions[x].index, __.dimensions[y].index);
});
};
// 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[isNaN(Number(col)) ? col : parseInt(col)] = pc.toTypeCoerceNumbers(data[0][col]);
});
return types;
};
pc.render = function() {
// try to autodetect dimensions and create scales
if (!d3.keys(__.dimensions).length) {
pc.detectDimensions()
}
pc.autoscale();
pc.render[__.mode]();
events.render.call(this);
return this;
};
pc.renderBrushed = function() {
if (!d3.keys(__.dimensions).length) pc.detectDimensions();
pc.renderBrushed[__.mode]();
events.render.call(this);
return this;
};
function isBrushed() {
if (__.brushed && __.brushed.length !== __.data.length)
return true;
var object = brush.currentMode().brushState();
for (var key in object) {
if (object.hasOwnProperty(key)) {
return true;
}
}
return false;
};
pc.render.default = function() {
pc.clear('foreground');
pc.clear('highlight');
pc.renderBrushed.default();
__.data.forEach(path_foreground);
};
var foregroundQueue = d3.renderQueue(path_foreground)
.rate(50)
.clear(function() {
pc.clear('foreground');
pc.clear('highlight');
});
pc.render.queue = function() {
pc.renderBrushed.queue();
foregroundQueue(__.data);
};
pc.renderBrushed.default = function() {
pc.clear('brushed');
if (isBrushed()) {
__.brushed.forEach(path_brushed);
}
};
var brushedQueue = d3.renderQueue(path_brushed)
.rate(50)
.clear(function() {
pc.clear('brushed');
});
pc.renderBrushed.queue = function() {
if (isBrushed()) {
brushedQueue(__.brushed);
} else {
brushedQueue([]); // This is needed to clear the currently brushed items
}
};
function compute_cluster_centroids(d) {
var clusterCentroids = d3.map();
var clusterCounts = d3.map();
// determine clusterCounts
__.data.forEach(function(row) {
var scaled = __.dimensions[d].yscale(row[d]);
if (!clusterCounts.has(scaled)) {
clusterCounts.set(scaled, 0);
}
var count = clusterCounts.get(scaled);
clusterCounts.set(scaled, count + 1);
});
__.data.forEach(function(row) {
d3.keys(__.dimensions).map(function(p, i) {
var scaled = __.dimensions[d].yscale(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 += __.dimensions[p].yscale(row[p]) / clusterCounts.get(scaled);
clusterCentroids.get(scaled).set(p, value);
});
});
return clusterCentroids;
}
function compute_centroids(row) {
var centroids = [];
var p = d3.keys(__.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 = __.dimensions[p[i]].yscale(row[p[i]]);
centroids.push($V([x, y]));
// centroids on 'virtual' axes
if (i < cols - 1) {
var cx = x + a * (position(p[i+1]) - x);
var cy = y + a * (__.dimensions[p[i+1]].yscale(row[p[i+1]]) - y);
if (__.bundleDimension !== null) {
var leftCentroid = __.clusterCentroids.get(__.dimensions[__.bundleDimension].yscale(row[__.bundleDimension])).get(p[i]);
var rightCentroid = __.clusterCentroids.get(__.dimensions[__.bundleDimension].yscale(row[__.bundleDimension])).get(p[i+1]);
var centroid = 0.5 * (leftCentroid + rightCentroid);
cy = centroid + (1 - __.bundlingStrength) * (cy - centroid);
}
centroids.push($V([cx, cy]));
}
}
return centroids;
}
pc.compute_real_centroids = function(row) {
var realCentroids = [];
var p = d3.keys(__.dimensions);
var cols = p.length;
var a = 0.5;
for (var i = 0; i < cols; ++i) {
var x = position(p[i]);
var y = __.dimensions[p[i]].yscale(row[p[i]]);
realCentroids.push([x, y]);
}
return realCentroids;
}
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;
pc.alphaOnBrushed(0.1);
pc.render();
return this;
};
// draw dots with radius r on the axis line where data intersects
pc.axisDots = function(r) {
var r = r || 0.1;
var ctx = pc.ctx.marks;
var startAngle = 0;
var endAngle = 2 * Math.PI;
ctx.globalAlpha = d3.min([ 1 / Math.pow(__.data.length, 1 / 2), 1 ]);
__.data.forEach(function(d) {
d3.entries(__.dimensions).forEach(function(p, i) {
ctx.beginPath();
ctx.arc(position(p), __.dimensions[p.key].yscale(d[p]), r, startAngle, endAngle);
ctx.stroke();
ctx.fill();
});
});
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, ctx) {
ctx.beginPath();
if ((__.bundleDimension !== null && __.bundlingStrength > 0) || __.smoothness > 0) {
single_curve(d, ctx);
} else {
single_path(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_curve(d, ctx);
} else {
single_path(d, ctx);
}
});
ctx.stroke();
};
// returns the y-position just beyond the separating null value line
function getNullPosition() {
if (__.nullValueSeparator=="bottom") {
return h()+1;
} else if (__.nullValueSeparator=="top") {
return 1;
} else {
console.log("A value is NULL, but nullValueSeparator is not set; set it to 'bottom' or 'top'.");
}
return h()+1;
};
function single_path(d, ctx) {
d3.entries(__.dimensions).forEach(function(p, i) { //p isn't really p
if (i == 0) {
ctx.moveTo(position(p.key), typeof d[p.key] =='undefined' ? getNullPosition() : __.dimensions[p.key].yscale(d[p.key]));
} else {
ctx.lineTo(position(p.key), typeof d[p.key] =='undefined' ? getNullPosition() : __.dimensions[p.key].yscale(d[p.key]));
}
});
};
function path_brushed(d, i) {
if (__.brushedColor !== null) {
ctx.brushed.strokeStyle = d3.functor(__.brushedColor)(d, i);
} else {
ctx.brushed.strokeStyle = d3.functor(__.color)(d, i);
}
return color_path(d, ctx.brushed)
};
function path_foreground(d, i) {
ctx.foreground.strokeStyle = d3.functor(__.color)(d, i);
return color_path(d, ctx.foreground);
};
function path_highlight(d, i) {
ctx.highlight.strokeStyle = d3.functor(__.color)(d, i);
return color_path(d, ctx.highlight);
};
pc.clear = function(layer) {
ctx[layer].clearRect(0, 0, w() + 2, h() + 2);
// This will make sure that the foreground items are transparent
// without the need for changing the opacity style of the foreground canvas
// as this would stop the css styling from working
if(layer === "brushed" && isBrushed()) {
ctx.brushed.fillStyle = pc.selection.style("background-color");
ctx.brushed.globalAlpha = 1 - __.alphaOnBrushed;
ctx.brushed.fillRect(0, 0, w() + 2, h() + 2);
ctx.brushed.globalAlpha = __.alpha;
}
return this;
};
d3.rebind(pc, axis, "ticks", "orient", "tickValues", "tickSubdivide", "tickSize", "tickPadding", "tickFormat");
function flipAxisAndUpdatePCP(dimension) {
var g = pc.svg.selectAll(".dimension");
pc.flip(dimension);
d3.select(this.parentElement)
.transition()
.duration(__.animationTime)
.call(axis.scale(__.dimensions[dimension].yscale))
.call(axis.orient(__.dimensions[dimension].orient))
.call(axis.ticks(__.dimensions[dimension].ticks))
.call(axis.innerTickSize(__.dimensions[dimension].innerTickSize))
.call(axis.outerTickSize(__.dimensions[dimension].outerTickSize))
.call(axis.tickPadding(__.dimensions[dimension].tickPadding))
.call(axis.tickFormat(__.dimensions[dimension].tickFormat));
pc.render();
}
function rotateLabels() {
if (!__.rotateLabels) return;
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();
}
function dimensionLabels(d) {
return __.dimensions[d].title ? __.dimensions[d].title : d; // dimension display names
}
pc.createAxes = function() {
if (g) pc.removeAxes();
// Add a group element for each dimension.
g = pc.svg.selectAll(".dimension")
.data(pc.getOrderedDimensionKeys(), 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) {
var axisElement = d3.select(this).call( pc.applyAxisConfig(axis, __.dimensions[d]) );
axisElement.selectAll("path")
.style("fill", "none")
.style("stroke", "#222")
.style("shape-rendering", "crispEdges");
axisElement.selectAll("line")
.style("fill", "none")
.style("stroke", "#222")
.style("shape-rendering", "crispEdges");
})
.append("svg:text")
.attr({
"text-anchor": "middle",
"y": 0,
"transform": "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")",
"x": 0,
"class": "label"
})
.text(dimensionLabels)
.on("dblclick", flipAxisAndUpdatePCP)
.on("wheel", rotateLabels);
if (__.nullValueSeparator=="top") {
pc.svg.append("line")
.attr("x1", 0)
.attr("y1", 1+__.nullValueSeparatorPadding.top)
.attr("x2", w())
.attr("y2", 1+__.nullValueSeparatorPadding.top)
.attr("stroke-width", 1)
.attr("stroke", "#777")
.attr("fill", "none")
.attr("shape-rendering", "crispEdges");
} else if (__.nullValueSeparator=="bottom") {
pc.svg.append("line")
.attr("x1", 0)
.attr("y1", h()+1-__.nullValueSeparatorPadding.bottom)
.attr("x2", w())
.attr("y2", h()+1-__.nullValueSeparatorPadding.bottom)
.attr("stroke-width", 1)
.attr("stroke", "#777")
.attr("fill", "none")
.attr("shape-rendering", "crispEdges");
}
flags.axes= true;
return this;
};
pc.removeAxes = function() {
g.remove();
g = undefined;
return this;
};
pc.updateAxes = function(animationTime) {
if (typeof animationTime === 'undefined') {
animationTime = __.animationTime;
}
var g_data = pc.svg.selectAll(".dimension").data(pc.getOrderedDimensionKeys());
// 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) {
var axisElement = d3.select(this).call( pc.applyAxisConfig(axis, __.dimensions[d]) );
axisElement.selectAll("path")
.style("fill", "none")
.style("stroke", "#222")
.style("shape-rendering", "crispEdges");
axisElement.selectAll("line")
.style("fill", "none")
.style("stroke", "#222")
.style("shape-rendering", "crispEdges");
})
.append("svg:text")
.attr({
"text-anchor": "middle",
"y": 0,
"transform": "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")",
"x": 0,
"class": "label"
})
.text(dimensionLabels)
.on("dblclick", flipAxisAndUpdatePCP)
.on("wheel", rotateLabels);
// Update
g_data.attr("opacity", 0);
g_data.select(".axis")
.transition()
.duration(animationTime)
.each(function(d) { d3.select(this).call( pc.applyAxisConfig(axis, __.dimensions[d]) )
});
g_data.select(".label")
.transition()
.duration(animationTime)
.text(dimensionLabels)
.attr("transform", "translate(0,-5) rotate(" + __.dimensionTitleRotation + ")");
// Exit
g_data.exit().remove();
g = pc.svg.selectAll(".dimension");
g.transition().duration(animationTime)
.attr("transform", function(p) { return "translate(" + position(p) + ")"; })
.style("opacity", 1);
pc.svg.selectAll(".axis")
.transition()
.duration(animationTime)
.each(function(d) { d3.select(this).call( pc.applyAxisConfig(axis, __.dimensions[d]) );
});
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;
};
pc.applyAxisConfig = function(axis, dimension) {
return axis.scale(dimension.yscale)
.orient(dimension.orient)
.ticks(dimension.ticks)
.tickValues(dimension.tickValues)
.innerTickSize(dimension.innerTickSize)
.outerTickSize(dimension.outerTickSize)
.tickPadding(dimension.tickPadding)
.tickFormat(dimension.tickFormat)
};
// Jason Davies, http://bl.ocks.org/1341281
pc.reorderable = function() {
if (!g) pc.createAxes();
g.style("cursor", "move")
.call(d3.behavior.drag()
.on("dragstart", function(d) {
dragging[d] = this.__origin__ = xscale(d);
})
.on("drag", function(d) {
dragging[d] = Math.min(w(), Math.max(0, this.__origin__ += d3.event.dx));
pc.sortDimensions();
xscale.domain(pc.getOrderedDimensionKeys());
pc.render();
g.attr("transform", function(d) {
return "translate(" + position(d) + ")";
});
})
.on("dragend", function(d) {
// Let's see if the order has changed and send out an event if so.
var i = 0,
j = __.dimensions[d].index,
elem = this,
parent = this.parentElement;
while((elem = elem.previousElementSibling) != null) ++i;
if (i !== j) {
events.axesreorder.call(pc, pc.getOrderedDimensionKeys());
// 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
if (i > j) { // Element moved left
parent.insertBefore(this, parent.children[j - 1]);
} else { // Element moved right
if ((j + 1) < parent.children.length) {
parent.insertBefore(this, parent.children[j + 1]);
} else {
parent.appendChild(this);
}
}
}
delete this.__origin__;
delete dragging[d];
d3.select(this).transition().attr("transform", "translate(" + xscale(d) + ")");
pc.render();
}));
flags.reorderable = true;
return this;
};
// Reorder dimensions, such that the highest value (visually) is on the left and
// the lowest on the right. Visual values are determined by the data values in
// the given row.
pc.reorder = function(rowdata) {
var firstDim = pc.getOrderedDimensionKeys()[0];
pc.sortDimensionsByRowData(rowdata);
// NOTE: this is relatively cheap given that:
// number of dimensions < number of data items
// Thus we check equality of order to prevent rerendering when this is the case.
var reordered = false;
reordered = firstDim !== pc.getOrderedDimensionKeys()[0];
if (reordered) {
xscale.domain(pc.getOrderedDimensionKeys());
var highlighted = __.highlighted.slice(0);
pc.unhighlight();
g.transition()
.duration(1500)
.attr("transform", function(d) {
return "translate(" + xscale(d) + ")";
});
pc.render();
// pc.highlight() does not check whether highlighted is length zero, so we do that here.
if (highlighted.length !== 0) {
pc.highlight(highlighted);
}
}
}
pc.sortDimensionsByRowData = function(rowdata) {
var copy = __.dimensions;
var positionSortedKeys = d3.keys(__.dimensions).sort(function(a, b) {
var pixelDifference = __.dimensions[a].yscale(rowdata[a]) - __.dimensions[b].yscale(rowdata[b]);