This example shows how you can set up tick marks to be a fixed density rather than a fixed number of tick marks. This is useful for implementing visualizations that can be resized by the user.
Derived from
license: mit |
This example shows how you can set up tick marks to be a fixed density rather than a fixed number of tick marks. This is useful for implementing visualizations that can be resized by the user.
Derived from
<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<meta charset="utf-8"> | |
<title>Density-based Ticks</title> | |
<style> | |
.axis text { | |
font: 16pt sans-serif; | |
} | |
.label { | |
font: 24pt sans-serif; | |
} | |
.axis path, | |
.axis line { | |
fill: none; | |
stroke: #000; | |
stroke-width: 2px; | |
shape-rendering: crispEdges; | |
} | |
</style> | |
</head> | |
<body> | |
<script> | |
var outerWidth = 950; | |
var outerHeight = 500; | |
var margin = { left: 80, top: 50, right: 500, bottom: 250 }; | |
var xAxisLabelText = "Axis Label"; | |
var xAxisLabelOffset = 55; | |
var innerWidth = outerWidth - margin.left - margin.right; | |
var innerHeight = outerHeight - margin.top - margin.bottom; | |
var svg = d3.select("body").append("svg") | |
.attr("width", outerWidth) | |
.attr("height", outerHeight); | |
var g = svg.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
var xAxisG = g.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + innerHeight + ")"); | |
var xAxisLabel = g.append("text") | |
.style("text-anchor", "middle") | |
.attr("y", xAxisLabelOffset + innerHeight) | |
.attr("class", "label") | |
.text(xAxisLabelText); | |
var xScale = d3.scaleLinear().domain([0, 1000]); | |
var xAxis = d3.axisBottom().scale(xScale); | |
var xPixelsPerTick = 70; | |
function render(){ | |
var time = Date.now() / 800; | |
var varyingWidth = innerWidth + Math.sin(time) * 350; | |
xAxis.ticks(varyingWidth / xPixelsPerTick); | |
xAxisLabel.attr("x", varyingWidth / 2); | |
xScale.range([0, varyingWidth]); | |
xAxisG.call(xAxis); | |
requestAnimationFrame(render); | |
} | |
render(); | |
</script> | |
</body> | |
</html> |