Created
July 20, 2020 16:18
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Collaborative Scatter Plot Brushing
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<body collaboration="live" custom-events="brush-message, label-message" ignore-events="all"> | |
<script src="https://unpkg.com/peerjs@1.0.4/dist/peerjs.min.js"></script> | |
<script src="https://michaschwab.github.io/VisConnect/visconnect-bundle.js"></script> | |
<script src="//d3js.org/d3.v4.min.js"></script> | |
<h2>VisConnect Brushing</h2> | |
<p> | |
This VisConnect example is a copy of | |
<a href="https://bl.ocks.org/EfratVil/0e542f5fc426065dd1d4b6daaa345a9f">this block</a>. | |
The only changes are adding the PeerJS and VisConnect script tags, adding the collaboration attribute to the HTML | |
body, replacing d3.brush with vc.brush, and telling d3 to use vc.random instead of Math.random. | |
</p> | |
<p id="g1"></p> | |
<script> | |
function randomData(samples) { | |
var data = [], | |
random = d3.randomNormal.source(vc.random)(); | |
for (i = 0; i < samples; i++) { | |
data.push({ | |
x: random(), | |
y: random() | |
}); | |
} | |
return data; | |
} | |
var ds = randomData(300); | |
var margin = { top: 20, right: 20, bottom: 30, left: 50 }; | |
width = 800 - margin.left - margin.right, | |
height = 400 - margin.top - margin.bottom; | |
var x = d3.scaleLinear() | |
.range([0, width]); | |
var y = d3.scaleLinear() | |
.range([height, 0]); | |
var xAxis = d3.axisBottom(x).ticks(12), | |
yAxis = d3.axisLeft(y).ticks(12 * height / width); | |
var svg = d3.select("#g1").append("svg") | |
.attr("id", "g1_svg") | |
.attr("data-margin-right", margin.right) | |
.attr("data-margin-left", margin.left) | |
.attr("data-margin-top", margin.top) | |
.attr("data-margin-bottom", margin.bottom) | |
.attr("width", width + margin.left + margin.right) | |
.attr("height", height + margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
x.domain(d3.extent(ds, function (d) { return d.x; })).nice(); | |
y.domain(d3.extent(ds, function (d) { return d.y; })).nice(); | |
svg.append("g") | |
.attr("class", "x axis ") | |
.attr('id', "axis--x") | |
.attr("transform", "translate(0," + height + ")") | |
.call(xAxis); | |
svg.append("g") | |
.attr("class", "y axis") | |
.attr('id', "axis--y") | |
.call(yAxis); | |
var dot = svg.selectAll(".dot") | |
.data(ds) | |
.enter().append("circle") | |
.attr("class", "dot") | |
.attr("r", 5) | |
.attr("cx", function (d) { return x(d.x); }) | |
.attr("cy", function (d) { return y(d.y); }) | |
.attr("opacity", 0.7) | |
.style("fill", "#4292c6"); | |
svg.append("g") | |
.call(vc.brush().extent([[0, 0], [width, height]]).on("brush", brushed).on("end", brushended)); | |
function brushed() { | |
var s = d3.event.selection, | |
x0 = s[0][0], | |
y0 = s[0][1], | |
dx = s[1][0] - x0, | |
dy = s[1][1] - y0; | |
// console.log(s); | |
svg.selectAll('circle') | |
.style("fill", function (d) { | |
if (x(d.x) >= x0 && x(d.x) <= x0 + dx && y(d.y) >= y0 && y(d.y) <= y0 + dy) | |
{ return "#ec7014"; } | |
else { return "#4292c6"; } | |
}); | |
} | |
function brushended() { | |
if (!d3.event.selection) { | |
svg.selectAll('circle') | |
.transition() | |
.duration(150) | |
.ease(d3.easeLinear) | |
.style("fill", "#4292c6"); | |
} | |
} | |
</script> | |
</body> |
dsaffo
commented
Jul 21, 2020
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