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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no,minimal-ui"> | |
| <style> | |
| body { | |
| background: #ccc; | |
| margin: 0; | |
| } | |
| .page { | |
| text-align: center; | |
| top: 0; | |
| width: 100%; | |
| } | |
| .page--light { | |
| background: -moz-radial-gradient(center, ellipse cover, #fff 0%, #7db9e8 100%); | |
| background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #fff), color-stop(100%, #7db9e8)); | |
| background: -webkit-radial-gradient(center, ellipse cover, #fff 0%, #7db9e8 100%); | |
| background: -o-radial-gradient(center, ellipse cover, #fff 0%, #7db9e8 100%); | |
| background: -ms-radial-gradient(center, ellipse cover, #fff 0%, #7db9e8 100%); | |
| background: radial-gradient(ellipse at center, #fff 0%, #7db9e8 100%); | |
| color: #000; | |
| } | |
| .page--dark { | |
| background: -moz-radial-gradient(center, ellipse cover, #444 0%, #111 100%); | |
| background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #444), color-stop(100%, #111)); | |
| background: -webkit-radial-gradient(center, ellipse cover, #444 0%, #111 100%); | |
| background: -o-radial-gradient(center, ellipse cover, #444 0%, #111 100%); | |
| background: -ms-radial-gradient(center, ellipse cover, #444 0%, #111 100%); | |
| background: radial-gradient(ellipse at center, #444 0%, #111 100%); | |
| color: #fff; | |
| } | |
| </style> | |
| <div class="pages"> | |
| <div class="page page--dark"></div> | |
| <div class="page page--light"></div> | |
| <div class="page page--dark"></div> | |
| <div class="page page--light"></div> | |
| <div class="page page--dark"></div> | |
| </div> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script>!function() { | |
| var body = d3.select("body"), | |
| height, | |
| clientY0, | |
| pageY0, | |
| pageYMin = 0, | |
| pageYMax, | |
| dragSamples; | |
| var page = d3.selectAll(".page") | |
| .text(function(d, i) { return i; }); | |
| d3.select(window) | |
| .on("resize", resized) | |
| .on("touchstart", touchstarted) | |
| .on("touchmove", touchmoved) | |
| .on("touchend", touchended); | |
| // iOS reports the wrong innerHeight on load! | |
| d3.timer(function() { | |
| resized(); | |
| return true; | |
| }); | |
| function resized() { | |
| var height0 = height; | |
| height = innerHeight; | |
| page.style("height", height + "px"); | |
| body.style("font", (height * .4) + "px/" + (height * .9) + "px sans-serif"); | |
| pageYMax = (page.size() - 1) * height; | |
| if (height0) scrollTo(0, Math.max(0, Math.min(page.size() - 1, Math.round(pageYOffset / height0))) * height); | |
| } | |
| function touchstarted() { | |
| dragSamples = []; | |
| clientY0 = d3.event.changedTouches[0].clientY; | |
| pageY0 = pageYOffset; | |
| d3.event.preventDefault(); | |
| body.interrupt(); | |
| } | |
| function touchmoved() { | |
| var clientY1 = d3.event.changedTouches[0].clientY, | |
| pageY1 = pageY0 + clientY0 - clientY1; | |
| if (pageY1 < pageYMin) { | |
| if (pageYOffset > pageYMin) scrollTo(0, pageYMin); | |
| body.style("-webkit-transform", "translate3d(0," + -(pageY1 - pageYMin) / 3 + "px,0)"); | |
| } else if (pageY1 > pageYMax) { | |
| if (pageYOffset < pageYMax) scrollTo(0, pageYMax); | |
| body.style("-webkit-transform", "translate3d(0," + -(pageY1 - pageYMax) / 3 + "px,0)"); | |
| } else { | |
| scrollTo(0, pageY1); | |
| } | |
| if (dragSamples.push({y: pageY1, t: Date.now()}) > 8) dragSamples.shift(); | |
| } | |
| function touchended() { | |
| var s0 = dragSamples.shift(), | |
| s1 = dragSamples.pop(), | |
| t1 = Date.now(), | |
| y = pageYOffset; | |
| while (s0 && (t1 - s0.t > 350)) s0 = dragSamples.shift(); | |
| if (s0 && s1) { | |
| var vy = (s1.y - s0.y) / (s1.t - s0.t); | |
| if (vy > .5) y = Math.ceil(y / height) * height; | |
| else if (vy < -.5) y = Math.floor(y / height) * height; | |
| } | |
| y = Math.max(0, Math.min(page.size() - 1, Math.round(y / height))) * height; | |
| body.transition() | |
| .duration(500) | |
| .ease("cubic-out") | |
| .styleTween("-webkit-transform", function() { | |
| if (s1) { | |
| var i; | |
| if (s1.y < pageYMin) i = d3.interpolateNumber(-(s1.y - pageYMin) / 3, 0); | |
| if (s1.y > pageYMax) i = d3.interpolateNumber(-(s1.y - pageYMax) / 3, 0); | |
| return i && function(t) { return "translate3d(0," + i(t) + "px,0)"; }; | |
| } | |
| }) | |
| .tween("scroll", function() { | |
| var i = d3.interpolateNumber(pageYOffset, y); | |
| return function(t) { scrollTo(0, i(t)); }; | |
| }); | |
| } | |
| }()</script> |
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