Published
Edited
Jun 22, 2021
21 forks
50 stars
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chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.attr("stroke-width", 2);

const circles = d3.range(20).map(i => ({
x: Math.random() * (width - radius * 2) + radius,
y: Math.random() * (height - radius * 2) + radius,
index: i
}));

svg.selectAll("circle")
.data(circles)
.join("circle")
.attr("cx", d => d.x)
.attr("cy", d => d.y)
.attr("r", radius)
.attr("fill", d => d3.schemeCategory10[d.index % 10])
.call(drag)
.on("click", clicked);

function clicked(event, d) {
if (event.defaultPrevented) return; // dragged

d3.select(this).transition()
.attr("fill", "black")
.attr("r", radius * 2)
.transition()
.attr("r", radius)
.attr("fill", d3.schemeCategory10[d.index % 10]);
}

return svg.node();
}
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drag = {

function dragstarted() {
d3.select(this).attr("stroke", "black");
}

function dragged(event, d) {
d3.select(this).raise().attr("cx", d.x = event.x).attr("cy", d.y = event.y);
}

function dragended() {
d3.select(this).attr("stroke", null);
}

return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
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height = 600
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radius = 32
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d3 = require("d3@7")
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