Created
August 28, 2014 15:03
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Overscroll to switch pages
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start = undefined | |
breakTimeout = undefined | |
$overscroll_down_indicator = jQuery(".overscroll_down_indicator") | |
$overscroll_up_indicator = jQuery(".overscroll_up_indicator") | |
break_time = 100#ms | |
release_threshold = 300#ms | |
overscroll_break = -> | |
$overscroll_down_indicator.css("display","none") | |
$overscroll_up_indicator.css("display","none") | |
start = undefined | |
breakTimeout = undefined | |
overscroll = (e)-> | |
console.dir e | |
if jQuery(window).scrollTop() + jQuery(window).height() - jQuery("body").height() >= 0 | |
direction = "down" | |
else if jQuery(window).scrollTop() <= 0 | |
direction = "up" | |
else | |
direction = undefined | |
if direction? | |
clearTimeout(breakTimeout) | |
breakTimeout = setTimeout overscroll_break, break_time | |
now = jQuery.now() | |
start = now unless start? | |
elapsed = now - start | |
if direction is "up" | |
$overscroll_up_indicator.css | |
display: "block" | |
top: "#{50 * jQuery.easing["easeOutQuart"](null, elapsed, 0 , 1, release_threshold) - 25}px" | |
if direction is "down" | |
$overscroll_down_indicator.css | |
display: "block" | |
bottom: "#{50 * jQuery.easing["easeOutQuart"](null, elapsed, 0 , 1, release_threshold) - 25}px" | |
if elapsed > release_threshold | |
go_in_direction direction | |
overscroll_break() | |
else | |
overscroll_break() | |
return true | |
window.onwheel = overscroll | |
window.onmousewheel = overscroll |
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