By customizing the display of D3’s brush component, you can make a single-handle slider. Or, by using custom resize handles, you can make a two-handled slider.
Updated from mbostock's original Smooth Slider to including snapping on round values.
By customizing the display of D3’s brush component, you can make a single-handle slider. Or, by using custom resize handles, you can make a two-handled slider.
Updated from mbostock's original Smooth Slider to including snapping on round values.
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.axis { | |
font: 10px sans-serif; | |
-webkit-user-select: none; | |
-moz-user-select: none; | |
user-select: none; | |
} | |
.axis .domain { | |
fill: none; | |
stroke: #000; | |
stroke-opacity: .3; | |
stroke-width: 10px; | |
stroke-linecap: round; | |
} | |
.axis .halo { | |
fill: none; | |
stroke: #ddd; | |
stroke-width: 8px; | |
stroke-linecap: round; | |
} | |
.slider .handle { | |
fill: #fff; | |
stroke: #000; | |
stroke-opacity: .5; | |
stroke-width: 1.25px; | |
pointer-events: none; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script> | |
var margin = {top: 200, right: 50, bottom: 200, left: 50}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.bottom - margin.top; | |
var x = d3.scale.linear() | |
.domain([0, 180]) | |
.range([0, width]) | |
.clamp(true); | |
var brush = d3.svg.brush() | |
.x(x) | |
.extent([0, 0]) | |
.on("brush", brushed) | |
.on("brushend", brushend); | |
var svg = d3.select("body").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 + ")"); | |
svg.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + height / 2 + ")") | |
.call(d3.svg.axis() | |
.scale(x) | |
.orient("bottom") | |
.tickFormat(function(d) { return d + "°"; }) | |
.tickSize(0) | |
.tickPadding(12)) | |
.select(".domain") | |
.select(function() { return this.parentNode.appendChild(this.cloneNode(true)); }) | |
.attr("class", "halo"); | |
var slider = svg.append("g") | |
.attr("class", "slider") | |
.call(brush); | |
slider.selectAll(".extent,.resize") | |
.remove(); | |
slider.select(".background") | |
.attr("height", height); | |
var handle = slider.append("circle") | |
.attr("class", "handle") | |
.attr("transform", "translate(0," + height / 2 + ")") | |
.attr("r", 9); | |
slider | |
.call(brush.event) | |
.transition() // gratuitous intro! | |
.duration(750) | |
.call(brush.extent([70, 70])) | |
.call(brush.event); | |
function brushed() { | |
var value = brush.extent()[0]; | |
if (d3.event.sourceEvent) { // not a programmatic event | |
value = x.invert(d3.mouse(this)[0]); | |
brush.extent([value, value]); | |
} | |
handle.attr("cx", x(value)); | |
d3.select("body").style("background-color", d3.hsl(value, .8, .8)); | |
} | |
function brushend() { | |
if (!d3.event.sourceEvent) { | |
return; // only transition after input | |
} | |
var value = brush.extent()[0]; | |
brush.extent([value, value]); | |
d3.select(this) | |
.transition() | |
.duration(0) | |
.call(brush.event); | |
d3.select(this) | |
.transition() | |
.call(brush.extent(brush.extent().map(function(d) { return d3.round(d, -1); }))) | |
.call(brush.event); | |
} | |
</script> |