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radar.js
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radar.js
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// The MIT License (MIT)
// Copyright (c) 2017 Zalando SE
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
function radar_visualization(config) {
// custom random number generator, to make random sequence reproducible
// source: https://stackoverflow.com/questions/521295
var seed = 42;
function random() {
var x = Math.sin(seed++) * 10000;
return x - Math.floor(x);
}
function random_between(min, max) {
return min + random() * (max - min);
}
function normal_between(min, max) {
return min + (random() + random()) * 0.5 * (max - min);
}
// radial_min / radial_max are multiples of PI
const quadrants = [
{ radial_min: 0, radial_max: 0.5, factor_x: 1, factor_y: 1 },
{ radial_min: 0.5, radial_max: 1, factor_x: -1, factor_y: 1 },
{ radial_min: -1, radial_max: -0.5, factor_x: -1, factor_y: -1 },
{ radial_min: -0.5, radial_max: 0, factor_x: 1, factor_y: -1 }
];
const rings = [
{ radius: 130 },
{ radius: 220 },
{ radius: 310 },
{ radius: 400 }
];
const title_offset =
{ x: -675, y: -420 };
const footer_offset =
{ x: -675, y: 420 };
const legend_offset = [
{ x: 450, y: 90 },
{ x: -675, y: 90 },
{ x: -675, y: -310 },
{ x: 450, y: -310 }
];
function polar(cartesian) {
var x = cartesian.x;
var y = cartesian.y;
return {
t: Math.atan2(y, x),
r: Math.sqrt(x * x + y * y)
}
}
function cartesian(polar) {
return {
x: polar.r * Math.cos(polar.t),
y: polar.r * Math.sin(polar.t)
}
}
function bounded_interval(value, min, max) {
var low = Math.min(min, max);
var high = Math.max(min, max);
return Math.min(Math.max(value, low), high);
}
function bounded_ring(polar, r_min, r_max) {
return {
t: polar.t,
r: bounded_interval(polar.r, r_min, r_max)
}
}
function bounded_box(point, min, max) {
return {
x: bounded_interval(point.x, min.x, max.x),
y: bounded_interval(point.y, min.y, max.y)
}
}
function segment(quadrant, ring) {
var polar_min = {
t: quadrants[quadrant].radial_min * Math.PI,
r: ring === 0 ? 30 : rings[ring - 1].radius
};
var polar_max = {
t: quadrants[quadrant].radial_max * Math.PI,
r: rings[ring].radius
};
var cartesian_min = {
x: 15 * quadrants[quadrant].factor_x,
y: 15 * quadrants[quadrant].factor_y
};
var cartesian_max = {
x: rings[3].radius * quadrants[quadrant].factor_x,
y: rings[3].radius * quadrants[quadrant].factor_y
};
return {
clipx: function(d) {
var c = bounded_box(d, cartesian_min, cartesian_max);
var p = bounded_ring(polar(c), polar_min.r + 15, polar_max.r - 15);
d.x = cartesian(p).x; // adjust data too!
return d.x;
},
clipy: function(d) {
var c = bounded_box(d, cartesian_min, cartesian_max);
var p = bounded_ring(polar(c), polar_min.r + 15, polar_max.r - 15);
d.y = cartesian(p).y; // adjust data too!
return d.y;
},
random: function() {
return cartesian({
t: random_between(polar_min.t, polar_max.t),
r: normal_between(polar_min.r, polar_max.r)
});
}
}
}
// position each entry randomly in its segment
for (var i = 0; i < config.entries.length; i++) {
var entry = config.entries[i];
entry.segment = segment(entry.quadrant, entry.ring);
var point = entry.segment.random();
entry.x = point.x;
entry.y = point.y;
entry.color = entry.active || config.print_layout ?
config.rings[entry.ring].color : config.colors.inactive;
}
// partition entries according to segments
var segmented = new Array(4);
for (var quadrant = 0; quadrant < 4; quadrant++) {
segmented[quadrant] = new Array(4);
for (var ring = 0; ring < 4; ring++) {
segmented[quadrant][ring] = [];
}
}
for (var i=0; i<config.entries.length; i++) {
var entry = config.entries[i];
segmented[entry.quadrant][entry.ring].push(entry);
}
// assign unique sequential id to each entry
var id = 1;
for (var quadrant of [2,3,1,0]) {
for (var ring = 0; ring < 4; ring++) {
var entries = segmented[quadrant][ring];
entries.sort(function(a,b) { return a.label.localeCompare(b.label); })
for (var i=0; i<entries.length; i++) {
entries[i].id = "" + id++;
}
}
}
function translate(x, y) {
return "translate(" + x + "," + y + ")";
}
function viewbox(quadrant) {
return [
Math.max(0, quadrants[quadrant].factor_x * 400) - 420,
Math.max(0, quadrants[quadrant].factor_y * 400) - 420,
440,
440
].join(" ");
}
var svg = d3.select("svg#" + config.svg_id)
.style("background-color", config.colors.background)
.attr("width", config.width)
.attr("height", config.height);
var radar = svg.append("g");
if ("zoomed_quadrant" in config) {
svg.attr("viewBox", viewbox(config.zoomed_quadrant));
} else {
radar.attr("transform", translate(config.width / 2, config.height / 2));
}
var grid = radar.append("g");
// draw grid lines
grid.append("line")
.attr("x1", 0).attr("y1", -400)
.attr("x2", 0).attr("y2", 400)
.style("stroke", config.colors.grid)
.style("stroke-width", 1);
grid.append("line")
.attr("x1", -400).attr("y1", 0)
.attr("x2", 400).attr("y2", 0)
.style("stroke", config.colors.grid)
.style("stroke-width", 1);
// background color. Usage `.attr("filter", "url(#solid)")`
// SOURCE: https://stackoverflow.com/a/31013492/2609980
var defs = grid.append("defs");
var filter = defs.append("filter")
.attr("x", 0)
.attr("y", 0)
.attr("width", 1)
.attr("height", 1)
.attr("id", "solid");
filter.append("feFlood")
.attr("flood-color", "rgb(0, 0, 0, 0.8)");
filter.append("feComposite")
.attr("in", "SourceGraphic");
// draw rings
for (var i = 0; i < rings.length; i++) {
grid.append("circle")
.attr("cx", 0)
.attr("cy", 0)
.attr("r", rings[i].radius)
.style("fill", "none")
.style("stroke", config.colors.grid)
.style("stroke-width", 1);
if (config.print_layout) {
grid.append("text")
.text(config.rings[i].name)
.attr("y", -rings[i].radius + 62)
.attr("text-anchor", "middle")
.style("fill", "#e5e5e5")
.style("font-family", "Arial, Helvetica")
.style("font-size", "42px")
.style("font-weight", "bold")
.style("pointer-events", "none")
.style("user-select", "none");
}
}
function legend_transform(quadrant, ring, index=null) {
var dx = ring < 2 ? 0 : 120;
var dy = (index == null ? -16 : index * 12);
if (ring % 2 === 1) {
dy = dy + 36 + segmented[quadrant][ring-1].length * 12;
}
return translate(
legend_offset[quadrant].x + dx,
legend_offset[quadrant].y + dy
);
}
// draw title and legend (only in print layout)
if (config.print_layout) {
// title
radar.append("text")
.attr("transform", translate(title_offset.x, title_offset.y))
.text(config.title)
.style("font-family", "Arial, Helvetica")
.style("font-size", "34px");
// footer
radar.append("text")
.attr("transform", translate(footer_offset.x, footer_offset.y))
.text("▲ moved up ▼ moved down")
.attr("xml:space", "preserve")
.style("font-family", "Arial, Helvetica")
.style("font-size", "10px");
// legend
var legend = radar.append("g");
for (var quadrant = 0; quadrant < 4; quadrant++) {
legend.append("text")
.attr("transform", translate(
legend_offset[quadrant].x,
legend_offset[quadrant].y - 45
))
.text(config.quadrants[quadrant].name)
.style("font-family", "Arial, Helvetica")
.style("font-size", "18px");
for (var ring = 0; ring < 4; ring++) {
legend.append("text")
.attr("transform", legend_transform(quadrant, ring))
.text(config.rings[ring].name)
.style("font-family", "Arial, Helvetica")
.style("font-size", "12px")
.style("font-weight", "bold");
legend.selectAll(".legend" + quadrant + ring)
.data(segmented[quadrant][ring])
.enter()
.append("a")
.attr("href", function (d, i) {
return d.link ? d.link : "#"; // stay on same page if no link was provided
})
.append("text")
.attr("transform", function(d, i) { return legend_transform(quadrant, ring, i); })
.attr("class", "legend" + quadrant + ring)
.attr("id", function(d, i) { return "legendItem" + d.id; })
.text(function(d, i) { return d.id + ". " + d.label; })
.style("font-family", "Arial, Helvetica")
.style("font-size", "11px")
.on("mouseover", function(d) { showBubble(d); highlightLegendItem(d); })
.on("mouseout", function(d) { hideBubble(d); unhighlightLegendItem(d); });
}
}
}
// layer for entries
var rink = radar.append("g")
.attr("id", "rink");
// rollover bubble (on top of everything else)
var bubble = radar.append("g")
.attr("id", "bubble")
.attr("x", 0)
.attr("y", 0)
.style("opacity", 0)
.style("pointer-events", "none")
.style("user-select", "none");
bubble.append("rect")
.attr("rx", 4)
.attr("ry", 4)
.style("fill", "#333");
bubble.append("text")
.style("font-family", "sans-serif")
.style("font-size", "10px")
.style("fill", "#fff");
bubble.append("path")
.attr("d", "M 0,0 10,0 5,8 z")
.style("fill", "#333");
function showBubble(d) {
if (d.active || config.print_layout) {
var tooltip = d3.select("#bubble text")
.text(d.label);
var bbox = tooltip.node().getBBox();
d3.select("#bubble")
.attr("transform", translate(d.x - bbox.width / 2, d.y - 16))
.style("opacity", 0.8);
d3.select("#bubble rect")
.attr("x", -5)
.attr("y", -bbox.height)
.attr("width", bbox.width + 10)
.attr("height", bbox.height + 4);
d3.select("#bubble path")
.attr("transform", translate(bbox.width / 2 - 5, 3));
}
}
function hideBubble(d) {
var bubble = d3.select("#bubble")
.attr("transform", translate(0,0))
.style("opacity", 0);
}
function highlightLegendItem(d) {
var legendItem = document.getElementById("legendItem" + d.id);
legendItem.setAttribute("filter", "url(#solid)");
legendItem.setAttribute("fill", "white");
}
function unhighlightLegendItem(d) {
var legendItem = document.getElementById("legendItem" + d.id);
legendItem.removeAttribute("filter");
legendItem.removeAttribute("fill");
}
// draw blips on radar
var blips = rink.selectAll(".blip")
.data(config.entries)
.enter()
.append("g")
.attr("class", "blip")
.attr("transform", function(d, i) { return legend_transform(d.quadrant, d.ring, i); })
.on("mouseover", function(d) { showBubble(d); highlightLegendItem(d); })
.on("mouseout", function(d) { hideBubble(d); unhighlightLegendItem(d); });
// configure each blip
blips.each(function(d) {
var blip = d3.select(this);
// blip link
if (!config.print_layout && d.active && d.hasOwnProperty("link")) {
blip = blip.append("a")
.attr("xlink:href", d.link);
}
// blip shape
if (d.moved > 0) {
blip.append("path")
.attr("d", "M -11,5 11,5 0,-13 z") // triangle pointing up
.style("fill", d.color);
} else if (d.moved < 0) {
blip.append("path")
.attr("d", "M -11,-5 11,-5 0,13 z") // triangle pointing down
.style("fill", d.color);
} else {
blip.append("circle")
.attr("r", 9)
.attr("fill", d.color);
}
// blip text
if (d.active || config.print_layout) {
var blip_text = config.print_layout ? d.id : d.label.match(/[a-z]/i);
blip.append("text")
.text(blip_text)
.attr("y", 3)
.attr("text-anchor", "middle")
.style("fill", "#fff")
.style("font-family", "Arial, Helvetica")
.style("font-size", function(d) { return blip_text.length > 2 ? "8px" : "9px"; })
.style("pointer-events", "none")
.style("user-select", "none");
}
});
// make sure that blips stay inside their segment
function ticked() {
blips.attr("transform", function(d) {
return translate(d.segment.clipx(d), d.segment.clipy(d));
})
}
// distribute blips, while avoiding collisions
d3.forceSimulation()
.nodes(config.entries)
.velocityDecay(0.19) // magic number (found by experimentation)
.force("collision", d3.forceCollide().radius(12).strength(0.85))
.on("tick", ticked);
}