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distance-limited Voronoi Interaction
Raw
.block
license: CC0-1.0
border: no
height: 635
Raw
README.md

an ES2015 d3v4 fork of the bl.ock distance-limited Voronoi Interaction III from Kcnarf

this iteration offers a few improvements and developer comforts:

  • convert to ES2015
  • lint, convert to Airbnb style
  • store data as json
  • name data file data.json
  • convert to d3v4
  • remove pym.js dependency
  • use d3-tip tooltips
  • remove jQuery dependency
  • abstract out dataset-specific variable names into configuration block
  • derive color domain from the data

in a future iteration, I'd like to:

  • hide Voronoi paths
  • add arrow to tooltip div
  • make tooltip snap to point
  • package this resuable chart as an npm module

Original README.md

This block is based on Step 3 - Voronoi Scatterplot - Tooltip attached to circle from @NadiehBremer

The Voronoi technics (used to improve interactive experience) is something I like. But I'm quite confused when the mouse is far away from points/subjectsOfMatter. In the original example, this situation arises in the viz's top-left and bottom-right corners.

This block attempts to overcome this issue by:

  • still using the Voronoi partition to identifiy the closest point/subjectOfMmatter when they are close to each others
  • and, checking if the distance from the point to the mouse is close enought (max distance checking)

For the sake of illustration, interactive areas appear in (very) light blue. Interactive zones would not be rendered in the final viz.

The implementation in this block uses a plugin I made (see d3-distanceLimitedVoronoi Github project) that computes the adequate interactive area around each point. The adequate path is: voronoï-cell INTERSECT max-distance-from-point. Others ways could be:

  • clip each Voronoi cell with a circle shape (cf. this block)
  • use JS to determine if the pointer is close enought to display the tooltip (cf. this block)

This third implementation of distance-limited voronoi cell is simpler than the 2 others because:

  • compared to the clipPath way, it doesn't requires extra clipPathes (dedicated definition, and bindings to each cell)
  • compared to the JS-based way, mouse interaction is easier (only mouseenter and mouseout, no mousemoved), and less intensive (no mousemove); nevertheless, it comes with the cost of computing the adequate path of each cell.

Acknowledgments to:

Raw
d3-tip.js
// d3.tip
// Copyright (c) 2013 Justin Palmer
// ES6 / D3 v4 Adaption Copyright (c) 2016 Constantin Gavrilete
// Removal of ES6 for D3 v4 Adaption Copyright (c) 2016 David Gotz
//
// Tooltips for d3.js SVG visualizations
d3.functor = function functor(v) {
return typeof v === "function" ? v : function() {
return v;
};
};
d3.tip = function() {
var direction = d3_tip_direction,
offset = d3_tip_offset,
html = d3_tip_html,
node = initNode(),
svg = null,
point = null,
target = null
function tip(vis) {
svg = getSVGNode(vis)
point = svg.createSVGPoint()
document.body.appendChild(node)
}
// Public - show the tooltip on the screen
//
// Returns a tip
tip.show = function() {
var args = Array.prototype.slice.call(arguments)
if(args[args.length - 1] instanceof SVGElement) target = args.pop()
var content = html.apply(this, args),
poffset = offset.apply(this, args),
dir = direction.apply(this, args),
nodel = getNodeEl(),
i = directions.length,
coords,
scrollTop = document.documentElement.scrollTop || document.body.scrollTop,
scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft
nodel.html(content)
.style('position', 'absolute')
.style('opacity', 1)
// comment this out to avoid flickering tooltips
// .style('pointer-events', 'all')
while(i--) nodel.classed(directions[i], false)
coords = direction_callbacks[dir].apply(this)
nodel.classed(dir, true)
.style('top', (coords.top + poffset[0]) + scrollTop + 'px')
.style('left', (coords.left + poffset[1]) + scrollLeft + 'px')
return tip
}
// Public - hide the tooltip
//
// Returns a tip
tip.hide = function() {
var nodel = getNodeEl()
nodel
.style('opacity', 0)
.style('pointer-events', 'none')
return tip
}
// Public: Proxy attr calls to the d3 tip container. Sets or gets attribute value.
//
// n - name of the attribute
// v - value of the attribute
//
// Returns tip or attribute value
tip.attr = function(n, v) {
if (arguments.length < 2 && typeof n === 'string') {
return getNodeEl().attr(n)
} else {
var args = Array.prototype.slice.call(arguments)
d3.selection.prototype.attr.apply(getNodeEl(), args)
}
return tip
}
// Public: Proxy style calls to the d3 tip container. Sets or gets a style value.
//
// n - name of the property
// v - value of the property
//
// Returns tip or style property value
tip.style = function(n, v) {
// debugger;
if (arguments.length < 2 && typeof n === 'string') {
return getNodeEl().style(n)
} else {
var args = Array.prototype.slice.call(arguments);
if (args.length === 1) {
var styles = args[0];
Object.keys(styles).forEach(function(key) {
return d3.selection.prototype.style.apply(getNodeEl(), [key, styles[key]]);
});
}
}
return tip
}
// Public: Set or get the direction of the tooltip
//
// v - One of n(north), s(south), e(east), or w(west), nw(northwest),
// sw(southwest), ne(northeast) or se(southeast)
//
// Returns tip or direction
tip.direction = function(v) {
if (!arguments.length) return direction
direction = v == null ? v : d3.functor(v)
return tip
}
// Public: Sets or gets the offset of the tip
//
// v - Array of [x, y] offset
//
// Returns offset or
tip.offset = function(v) {
if (!arguments.length) return offset
offset = v == null ? v : d3.functor(v)
return tip
}
// Public: sets or gets the html value of the tooltip
//
// v - String value of the tip
//
// Returns html value or tip
tip.html = function(v) {
if (!arguments.length) return html
html = v == null ? v : d3.functor(v)
return tip
}
// Public: destroys the tooltip and removes it from the DOM
//
// Returns a tip
tip.destroy = function() {
if(node) {
getNodeEl().remove();
node = null;
}
return tip;
}
function d3_tip_direction() { return 'n' }
function d3_tip_offset() { return [0, 0] }
function d3_tip_html() { return ' ' }
var direction_callbacks = {
n: direction_n,
s: direction_s,
e: direction_e,
w: direction_w,
nw: direction_nw,
ne: direction_ne,
sw: direction_sw,
se: direction_se
};
var directions = Object.keys(direction_callbacks);
function direction_n() {
var bbox = getScreenBBox()
return {
top: bbox.n.y - node.offsetHeight,
left: bbox.n.x - node.offsetWidth / 2
}
}
function direction_s() {
var bbox = getScreenBBox()
return {
top: bbox.s.y,
left: bbox.s.x - node.offsetWidth / 2
}
}
function direction_e() {
var bbox = getScreenBBox()
return {
top: bbox.e.y - node.offsetHeight / 2,
left: bbox.e.x
}
}
function direction_w() {
var bbox = getScreenBBox()
return {
top: bbox.w.y - node.offsetHeight / 2,
left: bbox.w.x - node.offsetWidth
}
}
function direction_nw() {
var bbox = getScreenBBox()
return {
top: bbox.nw.y - node.offsetHeight,
left: bbox.nw.x - node.offsetWidth
}
}
function direction_ne() {
var bbox = getScreenBBox()
return {
top: bbox.ne.y - node.offsetHeight,
left: bbox.ne.x
}
}
function direction_sw() {
var bbox = getScreenBBox()
return {
top: bbox.sw.y,
left: bbox.sw.x - node.offsetWidth
}
}
function direction_se() {
var bbox = getScreenBBox()
return {
top: bbox.se.y,
left: bbox.e.x
}
}
function initNode() {
var node = d3.select(document.createElement('div'))
node
.style('position', 'absolute')
.style('top', 0)
.style('opacity', 0)
.style('pointer-events', 'none')
.style('box-sizing', 'border-box')
return node.node()
}
function getSVGNode(el) {
el = el.node()
if(el.tagName.toLowerCase() === 'svg')
return el
return el.ownerSVGElement
}
function getNodeEl() {
if(node === null) {
node = initNode();
// re-add node to DOM
document.body.appendChild(node);
};
return d3.select(node);
}
// Private - gets the screen coordinates of a shape
//
// Given a shape on the screen, will return an SVGPoint for the directions
// n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
// sw(southwest).
//
// +-+-+
// | |
// + +
// | |
// +-+-+
//
// Returns an Object {n, s, e, w, nw, sw, ne, se}
function getScreenBBox() {
var targetel = target || d3.event.target;
while ('undefined' === typeof targetel.getScreenCTM && 'undefined' === targetel.parentNode) {
targetel = targetel.parentNode;
}
var bbox = {},
matrix = targetel.getScreenCTM(),
tbbox = targetel.getBBox(),
width = tbbox.width,
height = tbbox.height,
x = tbbox.x,
y = tbbox.y
point.x = x
point.y = y
bbox.nw = point.matrixTransform(matrix)
point.x += width
bbox.ne = point.matrixTransform(matrix)
point.y += height
bbox.se = point.matrixTransform(matrix)
point.x -= width
bbox.sw = point.matrixTransform(matrix)
point.y -= height / 2
bbox.w = point.matrixTransform(matrix)
point.x += width
bbox.e = point.matrixTransform(matrix)
point.x -= width / 2
point.y -= height / 2
bbox.n = point.matrixTransform(matrix)
point.y += height
bbox.s = point.matrixTransform(matrix)
return bbox
}
return tip
};
Raw
data.json
[
{
"Country": "Afghanistan",
"CountryCode": "AFG",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 15936784437.22,
"GDP_perCapita": 561.2,
"lifeExpectancy": 59.60009756
},
{
"Country": "Albania",
"CountryCode": "ALB",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 11926957254.63,
"GDP_perCapita": 4094.36,
"lifeExpectancy": 76.9785122
},
{
"Country": "Algeria",
"CountryCode": "DZA",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 161207304960.46,
"GDP_perCapita": 4349.57,
"lifeExpectancy": 70.61660976
},
{
"Country": "Angola",
"CountryCode": "AGO",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 82470894868.33,
"GDP_perCapita": 4218.65,
"lifeExpectancy": 50.65417073
},
{
"Country": "Antigua and Barbuda",
"CountryCode": "ATG",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 1135539037.04,
"GDP_perCapita": 13017.31,
"lifeExpectancy": 75.33390244
},
{
"Country": "Argentina",
"CountryCode": "ARG",
"Region": "America | South",
"Continent": "Americas",
"GDP": 462703793707.19,
"GDP_perCapita": 11460.38,
"lifeExpectancy": 75.66356098
},
{
"Country": "Armenia",
"CountryCode": "ARM",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 9260287416.06,
"GDP_perCapita": 3124.78,
"lifeExpectancy": 74.21965854
},
{
"Country": "Aruba",
"CountryCode": "ABW",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 2467703910.61,
"GDP_perCapita": 24289.14,
"lifeExpectancy": 74.95202439
},
{
"Country": "Australia",
"CountryCode": "AUS",
"Region": "Oceania",
"Continent": "Oceania",
"GDP": 1141267760188.09,
"GDP_perCapita": 51800.93,
"lifeExpectancy": 81.69512195
},
{
"Country": "Austria",
"CountryCode": "AUT",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 389656071767.18,
"GDP_perCapita": 46590.61,
"lifeExpectancy": 80.5804878
},
{
"Country": "Azerbaijan",
"CountryCode": "AZE",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 52902703376.11,
"GDP_perCapita": 5842.81,
"lifeExpectancy": 70.45029268
},
{
"Country": "Bahamas, The",
"CountryCode": "BHS",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 7.91e+09,
"GDP_perCapita": 21941.87,
"lifeExpectancy": 74.59239024
},
{
"Country": "Bahrain",
"CountryCode": "BHR",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 25713544824.94,
"GDP_perCapita": 20545.97,
"lifeExpectancy": 76.26485366
},
{
"Country": "Bangladesh",
"CountryCode": "BGD",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 115279077465.23,
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"lifeExpectancy": 69.48580488
},
{
"Country": "Barbados",
"CountryCode": "BRB",
"Region": "America | North & Central",
"Continent": "Americas",
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"lifeExpectancy": 74.80178049
},
{
"Country": "Belarus",
"CountryCode": "BLR",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 55220932613.96,
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"lifeExpectancy": 70.40487805
},
{
"Country": "Belgium",
"CountryCode": "BEL",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 484404271608.09,
"GDP_perCapita": 44358.26,
"lifeExpectancy": 80.23414634
},
{
"Country": "Belize",
"CountryCode": "BLZ",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 1397113450,
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"lifeExpectancy": 73.2704878
},
{
"Country": "Benin",
"CountryCode": "BEN",
"Region": "Africa | South & West",
"Continent": "Africa",
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"lifeExpectancy": 58.74668293
},
{
"Country": "Bermuda",
"CountryCode": "BMU",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 5744414000,
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"lifeExpectancy": 79.28853659
},
{
"Country": "Bhutan",
"CountryCode": "BTN",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 1585396256.12,
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"lifeExpectancy": 67.00468293
},
{
"Country": "Bolivia",
"CountryCode": "BOL",
"Region": "America | South",
"Continent": "Americas",
"GDP": 19649631308.16,
"GDP_perCapita": 1934.67,
"lifeExpectancy": 66.31970732
},
{
"Country": "Bosnia and Herzegovina",
"CountryCode": "BIH",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 16847493058.85,
"GDP_perCapita": 4380.6,
"lifeExpectancy": 75.80668293
},
{
"Country": "Botswana",
"CountryCode": "BWA",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 13746712711.21,
"GDP_perCapita": 6980.36,
"lifeExpectancy": 46.44029268
},
{
"Country": "Brazil",
"CountryCode": "BRA",
"Region": "America | South",
"Continent": "Americas",
"GDP": 2143067871759.89,
"GDP_perCapita": 10978.26,
"lifeExpectancy": 73.07531707
},
{
"Country": "Brunei Darussalam",
"CountryCode": "BRN",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 12369708858.9,
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"lifeExpectancy": 77.98865854
},
{
"Country": "Bulgaria",
"CountryCode": "BGR",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 48669060511.71,
"GDP_perCapita": 6580.81,
"lifeExpectancy": 73.51219512
},
{
"Country": "Burkina Faso",
"CountryCode": "BFA",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 8992678844.36,
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"lifeExpectancy": 55.0067561
},
{
"Country": "Burundi",
"CountryCode": "BDI",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 2026864414.47,
"GDP_perCapita": 219.53,
"lifeExpectancy": 52.62402439
},
{
"Country": "Cabo Verde",
"CountryCode": "CPV",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 1664310632.51,
"GDP_perCapita": 3413.26,
"lifeExpectancy": 73.85697561
},
{
"Country": "Cambodia",
"CountryCode": "KHM",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 11242266333.93,
"GDP_perCapita": 782.62,
"lifeExpectancy": 70.64336585
},
{
"Country": "Cameroon",
"CountryCode": "CMR",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 23622482954.8,
"GDP_perCapita": 1145.37,
"lifeExpectancy": 53.69482927
},
{
"Country": "Canada",
"CountryCode": "CAN",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 1614072093764.07,
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"lifeExpectancy": 80.8934878
},
{
"Country": "Central African Republic",
"CountryCode": "CAF",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 1986014759.2,
"GDP_perCapita": 456.56,
"lifeExpectancy": 48.09873171
},
{
"Country": "Chad",
"CountryCode": "TCD",
"Region": "Africa | South & West",
"Continent": "Africa",
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"lifeExpectancy": 49.76985366
},
{
"Country": "Chile",
"CountryCode": "CHL",
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"lifeExpectancy": 79.05046341
},
{
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"CountryCode": "CHN",
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"Continent": "Asia",
"GDP": 5930502270312.98,
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"lifeExpectancy": 74.88502439
},
{
"Country": "Colombia",
"CountryCode": "COL",
"Region": "America | South",
"Continent": "Americas",
"GDP": 287018184637.53,
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"lifeExpectancy": 73.36768293
},
{
"Country": "Comoros",
"CountryCode": "COM",
"Region": "Africa | North & East",
"Continent": "Africa",
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"lifeExpectancy": 60.20341463
},
{
"Country": "Congo, Rep.",
"CountryCode": "COG",
"Region": "Africa | South & West",
"Continent": "Africa",
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"GDP_perCapita": 2920.41,
"lifeExpectancy": 57.20402439
},
{
"Country": "Costa Rica",
"CountryCode": "CRI",
"Region": "America | North & Central",
"Continent": "Americas",
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"lifeExpectancy": 79.27970732
},
{
"Country": "Cote d'Ivoire",
"CountryCode": "CIV",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 24884503950.68,
"GDP_perCapita": 1311.33,
"lifeExpectancy": 49.67529268
},
{
"Country": "Croatia",
"CountryCode": "HRV",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 59643818181.82,
"GDP_perCapita": 13500.85,
"lifeExpectancy": 76.47560976
},
{
"Country": "Cuba",
"CountryCode": "CUB",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 64328220000,
"GDP_perCapita": 5701.96,
"lifeExpectancy": 78.71778049
},
{
"Country": "Cyprus",
"CountryCode": "CYP",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 23132450331.13,
"GDP_perCapita": 27889.04,
"lifeExpectancy": 79.30982927
},
{
"Country": "Czech Republic",
"CountryCode": "CZE",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 207016402026.36,
"GDP_perCapita": 19764.02,
"lifeExpectancy": 77.42439024
},
{
"Country": "Denmark",
"CountryCode": "DNK",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 319812413596.9,
"GDP_perCapita": 57647.93,
"lifeExpectancy": 79.1
},
{
"Country": "Djibouti",
"CountryCode": "DJI",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 1128611700.36,
"GDP_perCapita": 1353.19,
"lifeExpectancy": 60.29119512
},
{
"Country": "Dominican Republic",
"CountryCode": "DOM",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 53042943731.14,
"GDP_perCapita": 5295.4,
"lifeExpectancy": 72.79214634
},
{
"Country": "Ecuador",
"CountryCode": "ECU",
"Region": "America | South",
"Continent": "Americas",
"GDP": 69555367000,
"GDP_perCapita": 4636.69,
"lifeExpectancy": 75.64770732
},
{
"Country": "Egypt, Arab Rep.",
"CountryCode": "EGY",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 218887812549.85,
"GDP_perCapita": 2803.53,
"lifeExpectancy": 70.45082927
},
{
"Country": "El Salvador",
"CountryCode": "SLV",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 21418300000,
"GDP_perCapita": 3444.46,
"lifeExpectancy": 71.63441463
},
{
"Country": "Equatorial Guinea",
"CountryCode": "GNQ",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 11582917790.3,
"GDP_perCapita": 16638.13,
"lifeExpectancy": 51.53307317
},
{
"Country": "Eritrea",
"CountryCode": "ERI",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 2117039510.7,
"GDP_perCapita": 368.75,
"lifeExpectancy": 61.18509756
},
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"Continent": "Oceania",
"GDP": 681587104.77,
"GDP_perCapita": 1294.69,
"lifeExpectancy": 67.06665854
},
{
"Country": "South Africa",
"CountryCode": "ZAF",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 375349442837.19,
"GDP_perCapita": 7389.96,
"lifeExpectancy": 54.3907561
},
{
"Country": "Spain",
"CountryCode": "ESP",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 1431587612302.26,
"GDP_perCapita": 30736,
"lifeExpectancy": 81.62682927
},
{
"Country": "Sri Lanka",
"CountryCode": "LKA",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 49567521669.91,
"GDP_perCapita": 2400.02,
"lifeExpectancy": 73.75526829
},
{
"Country": "St. Lucia",
"CountryCode": "LCA",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 1244297407.41,
"GDP_perCapita": 7014.2,
"lifeExpectancy": 74.41102439
},
{
"Country": "St. Vincent and the Grenadines",
"CountryCode": "VCT",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 681225962.96,
"GDP_perCapita": 6231.71,
"lifeExpectancy": 72.18492683
},
{
"Country": "Sudan",
"CountryCode": "SDN",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 65632081240.3,
"GDP_perCapita": 1439.52,
"lifeExpectancy": 61.47829268
},
{
"Country": "Suriname",
"CountryCode": "SUR",
"Region": "America | South",
"Continent": "Americas",
"GDP": 4368398047.64,
"GDP_perCapita": 8321.39,
"lifeExpectancy": 70.33582927
},
{
"Country": "Swaziland",
"CountryCode": "SWZ",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 3891575151.61,
"GDP_perCapita": 3261.6,
"lifeExpectancy": 48.3457561
},
{
"Country": "Sweden",
"CountryCode": "SWE",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 488377689564.92,
"GDP_perCapita": 52076.26,
"lifeExpectancy": 81.45121951
},
{
"Country": "Switzerland",
"CountryCode": "CHE",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 581208562423.37,
"GDP_perCapita": 74276.72,
"lifeExpectancy": 82.24634146
},
{
"Country": "Tajikistan",
"CountryCode": "TJK",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 5642178579.58,
"GDP_perCapita": 739.73,
"lifeExpectancy": 66.9955122
},
{
"Country": "Tanzania",
"CountryCode": "TZA",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 30917376837.12,
"GDP_perCapita": 707.93,
"lifeExpectancy": 59.18170732
},
{
"Country": "Thailand",
"CountryCode": "THA",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 318907930075.71,
"GDP_perCapita": 4802.66,
"lifeExpectancy": 73.81378049
},
{
"Country": "Togo",
"CountryCode": "TGO",
"Region": "Africa | South & West",
"Continent": "Africa",
"GDP": 3172945506.36,
"GDP_perCapita": 503.16,
"lifeExpectancy": 55.46887805
},
{
"Country": "Tonga",
"CountryCode": "TON",
"Region": "Oceania",
"Continent": "Oceania",
"GDP": 369212477.46,
"GDP_perCapita": 3546.78,
"lifeExpectancy": 72.18263415
},
{
"Country": "Trinidad and Tobago",
"CountryCode": "TTO",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 20758191857.98,
"GDP_perCapita": 15630.05,
"lifeExpectancy": 69.59736585
},
{
"Country": "Tunisia",
"CountryCode": "TUN",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 44426016487.36,
"GDP_perCapita": 4212.15,
"lifeExpectancy": 74.60243902
},
{
"Country": "Turkey",
"CountryCode": "TUR",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 731168051903.11,
"GDP_perCapita": 10135.75,
"lifeExpectancy": 74.21119512
},
{
"Country": "Turkmenistan",
"CountryCode": "TKM",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 22148070175.44,
"GDP_perCapita": 4392.72,
"lifeExpectancy": 65.01821951
},
{
"Country": "Uganda",
"CountryCode": "UGA",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 18803852465.55,
"GDP_perCapita": 553.26,
"lifeExpectancy": 57.29653659
},
{
"Country": "Ukraine",
"CountryCode": "UKR",
"Region": "Europe | South & East",
"Continent": "Europe",
"GDP": 136419300367.96,
"GDP_perCapita": 2974,
"lifeExpectancy": 70.26536585
},
{
"Country": "United Arab Emirates",
"CountryCode": "ARE",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 286049293398.98,
"GDP_perCapita": 33885.93,
"lifeExpectancy": 76.59860976
},
{
"Country": "United Kingdom",
"CountryCode": "GBR",
"Region": "Europe | North & West",
"Continent": "Europe",
"GDP": 2407933767804.59,
"GDP_perCapita": 38363.44,
"lifeExpectancy": 80.40243902
},
{
"Country": "United States",
"CountryCode": "USA",
"Region": "America | North & Central",
"Continent": "Americas",
"GDP": 1.49644e+13,
"GDP_perCapita": 48377.39,
"lifeExpectancy": 78.54146341
},
{
"Country": "Uruguay",
"CountryCode": "URY",
"Region": "America | South",
"Continent": "Americas",
"GDP": 38881102099.88,
"GDP_perCapita": 11530.64,
"lifeExpectancy": 76.61621951
},
{
"Country": "Uzbekistan",
"CountryCode": "UZB",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 39332770928.94,
"GDP_perCapita": 1377.08,
"lifeExpectancy": 67.8587561
},
{
"Country": "Vanuatu",
"CountryCode": "VUT",
"Region": "Oceania",
"Continent": "Oceania",
"GDP": 700804286.22,
"GDP_perCapita": 2965.75,
"lifeExpectancy": 70.83890244
},
{
"Country": "Venezuela, RB",
"CountryCode": "VEN",
"Region": "America | South",
"Continent": "Americas",
"GDP": 393801556872.31,
"GDP_perCapita": 13559.13,
"lifeExpectancy": 74.17046341
},
{
"Country": "Vietnam",
"CountryCode": "VNM",
"Region": "Asia | East & Central",
"Continent": "Asia",
"GDP": 115931749904.86,
"GDP_perCapita": 1333.58,
"lifeExpectancy": 75.31173171
},
{
"Country": "Yemen, Rep.",
"CountryCode": "YEM",
"Region": "Asia | South & West",
"Continent": "Asia",
"GDP": 31743751169.32,
"GDP_perCapita": 1394.53,
"lifeExpectancy": 62.52765854
},
{
"Country": "Zambia",
"CountryCode": "ZMB",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 20265396325.59,
"GDP_perCapita": 1533.28,
"lifeExpectancy": 54.52756098
},
{
"Country": "Zimbabwe",
"CountryCode": "ZWE",
"Region": "Africa | North & East",
"Continent": "Africa",
"GDP": 9456808200,
"GDP_perCapita": 723.16,
"lifeExpectancy": 53.59312195
}
]
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv='Content-Type' content='text/html;charset=utf-8'/>
<title>Scatterplot with Distance-Limited Voronoi</title>
<script src='https://d3js.org/d3.v4.min.js'></script>
<script src='https://rawgit.com/Kcnarf/d3-distanceLimitedVoronoi/d3v4/distance-limited-voronoi.js'></script>
<script src='d3-tip.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.10.3/babel.min.js'></script>
<link href='http://fonts.googleapis.com/css?family=Open+Sans:700,400,300' rel='stylesheet' type='text/css'>
<style>
body {
font-family: 'Open Sans', sans-serif;
font-size: 12px;
font-weight: 400;
color: #525252;
text-align: center;
}
html, body {
width:auto;
height:auto;
}
.axis path,
.axis line {
fill: none;
stroke: #B3B3B3;
shape-rendering: crispEdges;
}
.axis text {
font-size: 10px;
fill: #6B6B6B;
}
.legendTitle {
fill: #1A1A1A;
color: #1A1A1A;
text-anchor: middle;
font-size: 10px;
}
.legendText {
fill: #949494;
text-anchor: start;
font-size: 9px;
}
@media (min-width: 500px) {
.col-sm-3, .col-sm-9 {
float: left;
}
.col-sm-9 {
width: 75%;
}
.col-sm-3 {
width: 25%;
}
}
</style>
</head>
<body>
<div id='cont' class='container-fluid text-center'>
<div class='row scatter'>
<h5 style='color: #3B3B3B;'>Life expectancy versus GDP per Capita</h5>
<h6 style='color: #A6A6A6;'>Distance-limited Voronoi - tooltip shown only if mouse is close enougth</h6>
<div class='col-sm-9'>
<div id='chart'>
<svg></svg>
</div>
</div>
<div id = 'legend' class='col-sm-3'>
<div class='legendTitle' style='font-size: 12px;'>REGION</div>
<div id='legend'></div>
</div>
</div>
</div>
<script src='script.js' lang='babel' type='text/babel'></script>
</body>
</html>
Raw
script.js
//
// Set-up
//
// map variables to our dataset
const xVariable = 'GDP_perCapita';
const yVariable = 'lifeExpectancy';
const rVariable = 'GDP';
const idVariable = 'CountryCode';
const groupByVariable = 'Region';
const tooltipVariable = 'Country';
// set label text
const xLabel = 'GDP per capita [US $] - Note the logarithmic scale';
const yLabel = 'Life expectancy';
// vanilla JS window width and height
const wV = window;
const dV = document;
const eV = dV.documentElement;
const gV = dV.getElementsByTagName('body')[0];
const xV = wV.innerWidth || eV.clientWidth || gV.clientWidth;
const yV = wV.innerHeight || eV.clientHeight || gV.clientHeight;
// Quick fix for resizing some things for mobile-ish viewers
const mobileScreen = (xV < 500);
// Scatterplot
const margin = { left: 30, top: 20, right: 20, bottom: 20 };
const chartWidth = document.getElementById('chart').offsetWidth;
const width = Math.min(chartWidth, 800) - margin.left - margin.right;
const height = width * 2 / 3;
// const maxDistanceFromPoint = 50;
const svg = d3.select('svg')
.attr('width', (width + margin.left + margin.right))
.attr('height', (height + margin.top + margin.bottom));
const wrapper = svg.append('g').attr('class', 'chordWrapper')
.attr('transform', `translate(${margin.left}, ${margin.top})`);
//
// Initialize Axes & Scales
//
const opacityCircles = 0.7;
// Set the color for each region
const color = d3.scaleOrdinal()
.range([
'#EFB605',
'#E58903',
'#E01A25',
'#C20049',
'#991C71',
'#66489F',
'#2074A0',
'#10A66E',
'#7EB852'
]);
d3.json('data.json', (error, data) => {
// get values for color domain from the data
const uniqueGroupByVariables = d3.set(data, d => d[groupByVariable])
.values()
.sort((a, b) => a > b); // ascending alphabetical sort
// set the domain of the color scale
// we use this later for the legend
color.domain(uniqueGroupByVariables);
// Set the new x axis range
const xScale = d3.scaleLog()
.range([0, width])
.domain([100, 2e5]);
// I prefer this exact scale over the true range and then using "nice"
// .domain(d3.extent(data, function(d) { return d[xVariable]; }))
// .nice();
// Set new x-axis
const xAxis = d3.axisBottom()
.ticks(10)
.tickFormat(d => // Difficult function to create better ticks
xScale.tickFormat((mobileScreen ? 4 : 8), e => {
const prefix = d3.format(",.0s");
return `$${prefix(e)}`;
})(d))
.scale(xScale);
// Append the x-axis
wrapper.append('g')
.attr('class', 'x axis')
.attr('transform', `translate(${0},${height})`)
.call(xAxis);
// Set the new y axis range
const yScale = d3.scaleLinear()
.range([height, 0])
.domain(d3.extent(data, d => d[yVariable]))
.nice();
const yAxis = d3.axisLeft()
.ticks(6) // Set rough # of ticks
.scale(yScale);
// Append the y-axis
wrapper.append('g')
.attr('class', 'y axis')
.attr('transform', `translate(${0}, ${0})`)
.call(yAxis);
// Scale for the bubble size
const rScale = d3.scaleSqrt()
.range([
mobileScreen ? 1 : 2,
mobileScreen ? 10 : 16
])
.domain(d3.extent(data, d => d[rVariable]));
//
// Scatterplot Circles
//
// Initiate a group element for the circles
const circleGroup = wrapper.append('g')
.attr('class', 'circleWrapper');
// Place the country circles
circleGroup.selectAll('marks')
.data(data.sort((a, b) => b[rVariable] > a[rVariable])) // Sort so the biggest circles are below
.enter().append('circle')
.attr('class', (d) => `marks ${d[idVariable]}`)
.style('opacity', opacityCircles)
.style('fill', d => color(d[groupByVariable]))
.attr('cx', d => xScale(d[xVariable]))
.attr('cy', d => yScale(d[yVariable]))
.attr('r', d => rScale(d[rVariable]));
//
// Tooltips
//
const tip = d3.tip()
.attr('class', 'd3-tip')
.html(d => {
return `<div style='background-color: white; padding: 5px; border-radius: 6px;
border-style: solid; border-color: #D1D1D1; border-width: 1px;'>
<span style='font-size: 11px; text-align: center;'>${d.datum[tooltipVariable]}</span>
</div>`
});
svg.call(tip);
//
// distance-limited Voronoi
//
/*
Initiate the voronoi function
Use the same variables of the data in the .x and .y as used
in the cx and cy of the circle call
The clip extent will make the boundaries end nicely along
the chart area instead of splitting up the entire SVG
(if you do not do this it would mean that you already see
a tooltip when your mouse is still in the axis area, which
is confusing)
*/
const xAccessor = d => xScale(d[xVariable]);
const yAccessor = d => yScale(d[yVariable]);
const limitedVoronoi = d3.distanceLimitedVoronoi()
.x(xAccessor)
.y(yAccessor)
.limit(50)
.extent([[0, 0], [width, height]]);
const limitedVoronoiCells = limitedVoronoi(data);
// Initiate a group element to place the voronoi diagram in
const limitedVoronoiGroup = wrapper.append('g')
.attr('class', 'voronoiWrapper');
// Create the distance-limited Voronoi diagram
limitedVoronoiGroup.selectAll('path')
.data(limitedVoronoiCells) // Use vononoi() with your dataset inside
.enter().append('path')
// .attr("d", function(d, i) { return "M" + d.join("L") + "Z"; })
.attr('d', (d, i) => d.path)
// Give each cell a unique class where the unique part corresponds to the circle classes
.attr('class', d => `voronoi ${d.datum[idVariable]}`)
.style('stroke', 'lightblue') // I use this to look at how the cells are dispersed as a check
.style('fill', 'none')
.style('pointer-events', 'all')
.on('mouseover', tip.show)
.on('mouseout', tip.hide);
//
// Initialize Labels
//
const xlabelText = xLabel || xVariable;
const yLabelText = yLabel || yVariable;
// Set up X axis label
wrapper.append('g')
.append('text')
.attr('class', 'x title')
.attr('text-anchor', 'end')
.style('font-size', `${mobileScreen ? 8 : 12}px`)
.attr('transform', `translate(${width},${height - 10})`)
.text(xlabelText);
// Set up y axis label
wrapper.append('g')
.append('text')
.attr('class', 'y title')
.attr('text-anchor', 'end')
.style('font-size', `${mobileScreen ? 8 : 12}px`)
.attr('transform', 'translate(18, 0) rotate(-90)')
.text(yLabelText);
//
// Create the Legend
//
if (!mobileScreen) {
// Legend
const legendMargin = { left: 5, top: 10, right: 5, bottom: 10 };
const legendWidth = 160;
const legendHeight = 270;
const svgLegend = d3.select('#legend').append('svg')
.attr('width', (legendWidth + legendMargin.left + legendMargin.right))
.attr('height', (legendHeight + legendMargin.top + legendMargin.bottom));
const legendWrapper = svgLegend.append('g').attr('class', 'legendWrapper')
.attr('transform', `translate(${legendMargin.left},${legendMargin.top})`);
// dimensions of the colored square
const rectSize = 16;
// height of a row in the legend
const rowHeight = 22;
// width of each row
// const maxWidth = 125
// Create container per rect/text pair
const legend = legendWrapper.selectAll('.legendSquare')
.data(color.range())
.enter().append('g')
.attr('class', 'legendSquare')
.attr('transform', (d, i) => `translate(${0},${i * rowHeight})`);
// Append small squares to Legend
legend.append('rect')
.attr('width', rectSize)
.attr('height', rectSize)
.style('fill', d => d);
// Append text to Legend
legend.append('text')
.attr('transform', `translate(${25},${rectSize / 2})`)
.attr('class', 'legendText')
.style('font-size', '11px')
.attr('dy', '.35em')
.text((d, i) => color.domain()[i]);
// if !mobileScreen
} else {
d3.select('#legend').style('display', 'none');
}
})
Raw
v3.js
//
// Set-up
//
// Quick fix for resizing some things for mobile-ish viewers
const mobileScreen = ($(window).innerWidth() < 500);
// Scatterplot
const margin = { left: 30, top: 20, right: 20, bottom: 20 };
const width = Math.min($('#chart').width(), 800) - margin.left - margin.right;
const height = width * 2 / 3;
// const maxDistanceFromPoint = 50;
const svg = d3.select('svg')
.attr('width', (width + margin.left + margin.right))
.attr('height', (height + margin.top + margin.bottom));
const wrapper = svg.append('g').attr('class', 'chordWrapper')
.attr('transform', `translate(${margin.left}, ${margin.top})`);
//
// Initialize Axes & Scales
//
const opacityCircles = 0.7;
// Set the color for each region
const color = d3.scale.ordinal()
.range([
'#EFB605',
'#E58903',
'#E01A25',
'#C20049',
'#991C71',
'#66489F',
'#2074A0',
'#10A66E',
'#7EB852'
])
.domain([
'Africa | North & East',
'Africa | South & West',
'America | North & Central',
'America | South',
'Asia | East & Central',
'Asia | South & West',
'Europe | North & West',
'Europe | South & East',
'Oceania'
]);
d3.json('data.json', (error, data) => {
// Set the new x axis range
const xScale = d3.scale.log()
.range([0, width])
.domain([100, 2e5]);
// I prefer this exact scale over the true range and then using "nice"
// .domain(d3.extent(data, function(d) { return d.GDP_perCapita; }))
// .nice();
// Set new x-axis
const xAxis = d3.svg.axis()
.orient('bottom')
.ticks(2)
.tickFormat(d => // Difficult function to create better ticks
xScale.tickFormat((mobileScreen ? 4 : 8), e => {
const prefix = d3.formatPrefix(e);
return `$${prefix.scale(e)}${prefix.symbol}`;
})(d))
.scale(xScale);
// Append the x-axis
wrapper.append('g')
.attr('class', 'x axis')
.attr('transform', `translate(${0},${height})`)
.call(xAxis);
// Set the new y axis range
const yScale = d3.scale.linear()
.range([height, 0])
.domain(d3.extent(data, d => d.lifeExpectancy))
.nice();
const yAxis = d3.svg.axis()
.orient('left')
.ticks(6) // Set rough # of ticks
.scale(yScale);
// Append the y-axis
wrapper.append('g')
.attr('class', 'y axis')
.attr('transform', `translate(${0}, ${0})`)
.call(yAxis);
// Scale for the bubble size
const rScale = d3.scale.sqrt()
.range([
mobileScreen ? 1 : 2,
mobileScreen ? 10 : 16
])
.domain(d3.extent(data, d => d.GDP));
//
// Scatterplot Circles
//
// Initiate a group element for the circles
const circleGroup = wrapper.append('g')
.attr('class', 'circleWrapper');
// Place the country circles
circleGroup.selectAll('countries')
.data(data.sort((a, b) => b.GDP > a.GDP)) // Sort so the biggest circles are below
.enter().append('circle')
.attr('class', (d) => `countries ${d.CountryCode}`)
.style('opacity', opacityCircles)
.style('fill', d => color(d.Region))
.attr('cx', d => xScale(d.GDP_perCapita))
.attr('cy', d => yScale(d.lifeExpectancy))
.attr('r', d => rScale(d.GDP));
//
// distance-limited Voronoi
//
/*
Initiate the voronoi function
Use the same variables of the data in the .x and .y as used
in the cx and cy of the circle call
The clip extent will make the boundaries end nicely along
the chart area instead of splitting up the entire SVG
(if you do not do this it would mean that you already see
a tooltip when your mouse is still in the axis area, which
is confusing)
*/
const xAccessor = d => xScale(d.GDP_perCapita);
const yAccessor = d => yScale(d.lifeExpectancy);
const limitedVoronoi = d3.distanceLimitedVoronoi()
.x(xAccessor)
.y(yAccessor)
.limit(50)
.clipExtent([[0, 0], [width, height]]);
const limitedVoronoiCells = limitedVoronoi(data);
// Initiate a group element to place the voronoi diagram in
const limitedVoronoiGroup = wrapper.append('g')
.attr('class', 'voronoiWrapper');
// Hide the tooltip when the mouse moves away
function removeTooltip(d) {
// Save the circle element (so not the voronoi which is triggering the hover event)
// in a variable by using the unique class of the voronoi (CountryCode)
const element = d3.selectAll(`.countries.${d.CountryCode}`);
// Hide the tooltip
$('.popover').each(function () {
$(this).remove();
});
// Fade out the bright circle again
element.style('opacity', opacityCircles);
}// function removeTooltip
// Show the tooltip on the hovered over circle
function showTooltip(d) {
// Save the circle element (so not the voronoi which is triggering the hover event)
// in a variable by using the unique class of the voronoi (CountryCode)
const element = d3.selectAll(`.countries.${d.CountryCode}`);
// skip tooltip creation if already defined
const existingTooltip = $('.popover');
if (existingTooltip !== null
&& existingTooltip.length > 0
&& existingTooltip.text() === d.Country) {
return;
}
// Define and show the tooltip using bootstrap popover
// But you can use whatever you prefer
$(element).popover({
placement: 'auto top', // place the tooltip above the item
container: '#chart', // the name (class or id) of the container
trigger: 'manual',
html: true,
content() { // the html content to show inside the tooltip
return `<span style='font-size: 11px; text-align: center;'>${d.Country}</span>`;
}
});
$(element).popover('show');
// Make chosen circle more visible
element.style('opacity', 1);
}// function showTooltip
// Create the distance-limited Voronoi diagram
limitedVoronoiGroup.selectAll('path')
.data(limitedVoronoiCells) // Use vononoi() with your dataset inside
.enter().append('path')
// .attr("d", function(d, i) { return "M" + d.join("L") + "Z"; })
.attr('d', (d, i) => d.path)
.datum((d, i) => d.point)
// Give each cell a unique class where the unique part corresponds to the circle classes
.attr('class', (d, i) => `voronoi ${d.CountryCode}`)
.style('stroke', 'lightblue') // I use this to look at how the cells are dispersed as a check
.style('fill', 'none')
.style('pointer-events', 'all')
// .on('mouseenter', showTooltip)
// .on('mouseout', removeTooltip);
//
// Initialize Labels
//
// Set up X axis label
wrapper.append('g')
.append('text')
.attr('class', 'x title')
.attr('text-anchor', 'end')
.style('font-size', `${mobileScreen ? 8 : 12}px`)
.attr('transform', `translate(${width},${height - 10})`)
.text('GDP per capita [US $] - Note the logarithmic scale');
// Set up y axis label
wrapper.append('g')
.append('text')
.attr('class', 'y title')
.attr('text-anchor', 'end')
.style('font-size', `${mobileScreen ? 8 : 12}px`)
.attr('transform', 'translate(18, 0) rotate(-90)')
.text('Life expectancy');
//
// Create the Legend
//
if (!mobileScreen) {
// Legend
const legendMargin = { left: 5, top: 10, right: 5, bottom: 10 };
const legendWidth = 160;
const legendHeight = 270;
const svgLegend = d3.select('#legend').append('svg')
.attr('width', (legendWidth + legendMargin.left + legendMargin.right))
.attr('height', (legendHeight + legendMargin.top + legendMargin.bottom));
const legendWrapper = svgLegend.append('g').attr('class', 'legendWrapper')
.attr('transform', `translate(${legendMargin.left},${legendMargin.top})`);
// dimensions of the colored square
const rectSize = 16;
// height of a row in the legend
const rowHeight = 22;
// width of each row
// const maxWidth = 125
// Create container per rect/text pair
const legend = legendWrapper.selectAll('.legendSquare')
.data(color.range())
.enter().append('g')
.attr('class', 'legendSquare')
.attr('transform', (d, i) => `translate(${0},${i * rowHeight})`);
// Append small squares to Legend
legend.append('rect')
.attr('width', rectSize)
.attr('height', rectSize)
.style('fill', d => d);
// Append text to Legend
legend.append('text')
.attr('transform', `translate(${25},${rectSize / 2})`)
.attr('class', 'legendText')
.style('font-size', '11px')
.attr('dy', '.35em')
.text((d, i) => color.domain()[i]);
// if !mobileScreen
} else {
d3.select('#legend').style('display', 'none');
}
// iFrame handler
// iFrame handler
const pymChild = new pym.Child();
pymChild.sendHeight();
setTimeout(() => { pymChild.sendHeight(); }, 5000);
})
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