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d3.js spinner
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| <!DOCTYPE html> | |
| <html> | |
| <style> | |
| html, body { | |
| margin: 0; | |
| color: #444; | |
| } | |
| #spinner { | |
| display: none; | |
| text-align: center; | |
| } | |
| </style> | |
| <body> | |
| <div id="spinner"> | |
| <div></div> | |
| <span>Prepare for the worst...</span> | |
| </div> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://coffeescript.org/extras/coffee-script.js"></script> | |
| <script type="text/coffeescript"> | |
| # | |
| # adapted from http://bl.ocks.org/Mattwoelk/6132258 | |
| # | |
| arc = (svg, rInner, rOuter, duration, direction) -> | |
| a = d3.svg.arc() | |
| .innerRadius(rInner) | |
| .outerRadius(rOuter) | |
| .startAngle(0) | |
| x = if direction == 'clockwise' then [0,360] else [360,0] | |
| x = x.map((alpha) -> "rotate(#{alpha})") | |
| timer = null | |
| stop = false | |
| spin = (selection) -> | |
| selection.transition() | |
| .ease('linear') | |
| .duration(duration) | |
| .attrTween('transform', -> d3.interpolateString(x[0], x[1])) | |
| if not stop | |
| timer = setTimeout((-> spin selection), duration) | |
| svg.append('path') | |
| .datum(endAngle: 0.66*Math.PI) | |
| .style('opacity', 0.2) | |
| .attr('d', a) | |
| .call(spin) | |
| stop: -> | |
| stop = true # prevent new timer from starting | |
| clearTimeout(timer) # stop pending timer | |
| spinner = (config) -> | |
| r = Math.min(config.width, config.height) / 2 | |
| duration = 1500 | |
| svg = d3.select("#{config.container} div") | |
| .append('svg') | |
| .attr('width', config.width) | |
| .attr('height', config.height) | |
| .append('g') | |
| .attr('transform', "translate(#{config.width/2},#{config.height/2})") | |
| arc1 = arc(svg, r*0.5, r*0.9, duration, 'clockwise') | |
| arc2 = arc(svg, r*0.1, r*0.4, duration, 'ccw') | |
| d3.select(config.container).style('display', 'block') | |
| stop: -> | |
| d3.select(config.container).style('display', 'none') | |
| arc1.stop() | |
| arc2.stop() | |
| spinner | |
| width: 600 | |
| height: 600 | |
| container: '#spinner' | |
| </script> | |
| </body> | |
| </html> |
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