d3-brush-handles
v1.0.1
Published
Brush handles for d3-brush
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d3-brush-handles
Library for adding handles to a one-dimensional d3 brush along the x-dimension.
add to d3 brush in browser
<!DOCTYPE html>
<script src="https://cdn.jsdelivr.net/npm/d3@7"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
<html>
<body>
<div id="chart-div"></div>
<script>
// create chart
let width = 600;
let height = 400;
const margin = { top: 10, right: 30, bottom: 30, left: 40 };
width = width - margin.left - margin.right,
height = height - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg = d3.select("#chart-div")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
const maxX = 1000;
// add x axis
const x = d3.scaleLinear()
.domain([0, maxX])
.range([0, width]);
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
// generate random data
const data = [];
for (let i = 0; i < 1000; i++) {
data.push(Math.random() * maxX);
}
// create bins
const bin = d3.bin()
.domain(x.domain())
.thresholds(x.ticks(20));
const bins = bin(data);
// add y axis
const y = d3.scaleLinear()
.domain([0, d3.max(bins, function (d) { return d.length; })])
.range([height, 0]);
svg.append("g")
.call(d3.axisLeft(y));
// append the bar rectangles to the svg element
svg.selectAll("rect")
.data(bins)
.enter()
.append("rect")
.attr("x", 1)
.attr("transform", function (d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; })
.attr("width", function (d) { return x(d.x1) - x(d.x0) - 1; })
.attr("height", function (d) { return height - y(d.length); })
.style("fill", "#69b3a2")
// add a brush container to the chart
const brushContainer = svg.append("g");
// create the brush
const brush = d3.brushX().extent([[0, 0], [width, height]]);
brushContainer.call(brush);
// move brush to the initial position
const initialPosition = [100, 200];
brushContainer.call(brush.move, initialPosition);
const handleWidth = 6;
const handleHeight = 20;
// add handles to the brush
window.d3BrushHandles.addHandlesToBrushX(brush, brushContainer, s => s.selection, height, handleWidth, handleHeight, initialPosition);
</script>
</body>
</html>