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.
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Smooth slider with snap-in on round values
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| <!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> |
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