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@@ -1,5 +1,5 @@ |
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/*! |
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* pagepiling.js 1.5.3 |
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* pagepiling.js 1.5.4 |
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* |
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* https://github.com/alvarotrigo/pagePiling.js |
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* @license MIT licensed |
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@@ -16,6 +16,7 @@ |
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var lastAnimation = 0; |
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var isTouch = (('ontouchstart' in window) || (navigator.msMaxTouchPoints > 0) || (navigator.maxTouchPoints)); |
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var touchStartY = 0, touchStartX = 0, touchEndY = 0, touchEndX = 0; |
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var scrollings = []; |
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//Defines the delay to take place before being able to scroll to the next section |
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//BE CAREFUL! Not recommened to change it under 400 for a good behavior in laptops and |
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@@ -558,30 +559,77 @@ |
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* http://blogs.sitepointstatic.com/examples/tech/mouse-wheel/index.html |
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* http://www.sitepoint.com/html5-javascript-mouse-wheel/ |
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*/ |
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var prevTime = new Date().getTime(); |
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function MouseWheelHandler(e) { |
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if(!isMoving()){ |
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// cross-browser wheel delta |
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e = window.event || e; |
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var delta = Math.max(-1, Math.min(1, |
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(e.wheelDelta || -e.deltaY || -e.detail))); |
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var curTime = new Date().getTime(); |
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// cross-browser wheel delta |
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e = e || window.event; |
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var value = e.wheelDelta || -e.deltaY || -e.detail; |
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var delta = Math.max(-1, Math.min(1, value)); |
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var horizontalDetection = typeof e.wheelDeltaX !== 'undefined' || typeof e.deltaX !== 'undefined'; |
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var isScrollingVertically = (Math.abs(e.wheelDeltaX) < Math.abs(e.wheelDelta)) || (Math.abs(e.deltaX ) < Math.abs(e.deltaY) || !horizontalDetection); |
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//Limiting the array to 150 (lets not waste memory!) |
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if(scrollings.length > 149){ |
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scrollings.shift(); |
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} |
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//keeping record of the previous scrollings |
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scrollings.push(Math.abs(value)); |
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//time difference between the last scroll and the current one |
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var timeDiff = curTime-prevTime; |
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prevTime = curTime; |
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//haven't they scrolled in a while? |
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//(enough to be consider a different scrolling action to scroll another section) |
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if(timeDiff > 200){ |
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//emptying the array, we dont care about old scrollings for our averages |
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scrollings = []; |
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} |
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if(!isMoving()){ |
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var activeSection = $('.pp-section.active'); |
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var scrollable = isScrollable(activeSection); |
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//scrolling down? |
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if (delta < 0) { |
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scrolling('down', scrollable); |
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var averageEnd = getAverage(scrollings, 10); |
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var averageMiddle = getAverage(scrollings, 70); |
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var isAccelerating = averageEnd >= averageMiddle; |
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//scrolling up? |
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}else { |
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scrolling('up', scrollable); |
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} |
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if(isAccelerating && isScrollingVertically){ |
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//scrolling down? |
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if (delta < 0) { |
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scrolling('down', scrollable); |
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//scrolling up? |
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}else if(delta>0){ |
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scrolling('up', scrollable); |
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} |
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} |
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return false; |
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} |
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} |
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/** |
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* Gets the average of the last `number` elements of the given array. |
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*/ |
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function getAverage(elements, number){ |
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var sum = 0; |
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//taking `number` elements from the end to make the average, if there are not enought, 1 |
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var lastElements = elements.slice(Math.max(elements.length - number, 1)); |
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for(var i = 0; i < lastElements.length; i++){ |
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sum = sum + lastElements[i]; |
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} |
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return Math.ceil(sum/number); |
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} |
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/** |
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* Determines the way of scrolling up or down: |
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* by 'automatically' scrolling a section or by using the default and normal scrolling. |
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@@ -606,7 +654,7 @@ |
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return true; |
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} |
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}else{ |
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// moved up/down |
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//moved up/down |
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scrollSection(); |
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} |
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} |
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