168 lines
4.7 KiB
JavaScript
168 lines
4.7 KiB
JavaScript
|
/*! UIkit 2.25.0 | http://www.getuikit.com | (c) 2014 YOOtheme | MIT License */
|
||
|
|
(function(addon) {
|
||
|
|
|
||
|
|
var component;
|
||
|
|
|
||
|
|
if (window.UIkit) {
|
||
|
|
component = addon(UIkit);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof define == "function" && define.amd) {
|
||
|
|
define("uikit-grid-parallax", ["uikit"], function(){
|
||
|
|
return component || addon(UIkit);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
})(function(UI){
|
||
|
|
|
||
|
|
var parallaxes = [], checkParallaxes = function() {
|
||
|
|
|
||
|
|
requestAnimationFrame(function(){
|
||
|
|
for (var i=0; i < parallaxes.length; i++) {
|
||
|
|
parallaxes[i].process();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
UI.component('gridparallax', {
|
||
|
|
|
||
|
|
defaults: {
|
||
|
|
target : false,
|
||
|
|
smooth : 150,
|
||
|
|
translate : 150
|
||
|
|
},
|
||
|
|
|
||
|
|
boot: function() {
|
||
|
|
|
||
|
|
// listen to scroll and resize
|
||
|
|
UI.$doc.on("scrolling.uk.document", checkParallaxes);
|
||
|
|
UI.$win.on("load resize orientationchange", UI.Utils.debounce(function(){
|
||
|
|
checkParallaxes();
|
||
|
|
}, 50));
|
||
|
|
|
||
|
|
// init code
|
||
|
|
UI.ready(function(context) {
|
||
|
|
|
||
|
|
UI.$('[data-uk-grid-parallax]', context).each(function() {
|
||
|
|
|
||
|
|
var parallax = UI.$(this);
|
||
|
|
|
||
|
|
if (!parallax.data("gridparallax")) {
|
||
|
|
UI.gridparallax(parallax, UI.Utils.options(parallax.attr("data-uk-grid-parallax")));
|
||
|
|
}
|
||
|
|
});
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
init: function() {
|
||
|
|
|
||
|
|
var $this = this;
|
||
|
|
|
||
|
|
this.initItems().process();
|
||
|
|
parallaxes.push(this);
|
||
|
|
|
||
|
|
UI.$win.on('load resize orientationchange', (function() {
|
||
|
|
|
||
|
|
var fn = function() {
|
||
|
|
var columns = getcolumns($this.element);
|
||
|
|
|
||
|
|
$this.element.css('margin-bottom', '');
|
||
|
|
|
||
|
|
if (columns > 1) {
|
||
|
|
$this.element.css('margin-bottom', $this.options.translate + parseInt($this.element.css('margin-bottom')));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
UI.$(function() { fn(); });
|
||
|
|
|
||
|
|
return UI.Utils.debounce(fn, 50);
|
||
|
|
})());
|
||
|
|
},
|
||
|
|
|
||
|
|
initItems: function() {
|
||
|
|
|
||
|
|
var smooth = this.options.smooth;
|
||
|
|
|
||
|
|
this.items = (this.options.target ? this.element.find(this.options.target) : this.element.children()).each(function(){
|
||
|
|
UI.$(this).css({
|
||
|
|
transition: 'transform '+smooth+'ms linear',
|
||
|
|
transform: ''
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
|
||
|
|
process: function() {
|
||
|
|
|
||
|
|
var percent = percentageInViewport(this.element),
|
||
|
|
columns = getcolumns(this.element),
|
||
|
|
items = this.items,
|
||
|
|
mods = [(columns-1)];
|
||
|
|
|
||
|
|
if (columns == 1 || !percent) {
|
||
|
|
items.css('transform', '');
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
while(mods.length < columns) {
|
||
|
|
if(!(mods[mods.length-1] - 2)) break;
|
||
|
|
mods.push(mods[mods.length-1] - 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
var translate = this.options.translate, percenttranslate = percent * translate;
|
||
|
|
|
||
|
|
items.each(function(idx, ele, translate){
|
||
|
|
translate = mods.indexOf((idx+1) % columns) != -1 ? percenttranslate : percenttranslate / 8;
|
||
|
|
UI.$(this).css('transform', 'translate3d(0,'+(translate)+'px, 0)');
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
function getcolumns(element) {
|
||
|
|
|
||
|
|
var children = element.children(),
|
||
|
|
first = children.filter(':visible:first'),
|
||
|
|
top = first[0].offsetTop + first.outerHeight();
|
||
|
|
|
||
|
|
for (var column=0;column<children.length;column++) {
|
||
|
|
if (children[column].offsetTop >= top) break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return column || 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
function percentageInViewport(element) {
|
||
|
|
|
||
|
|
var top = element.offset().top,
|
||
|
|
height = element.outerHeight(),
|
||
|
|
scrolltop = UIkit.$win.scrollTop(),
|
||
|
|
wh = window.innerHeight,
|
||
|
|
distance, percentage, percent;
|
||
|
|
|
||
|
|
if (top > (scrolltop + wh)) {
|
||
|
|
percent = 0;
|
||
|
|
} else if ((top + height) < scrolltop) {
|
||
|
|
percent = 1;
|
||
|
|
} else {
|
||
|
|
|
||
|
|
if ((top + height) < wh) {
|
||
|
|
percent = (scrolltop < wh ? scrolltop : scrolltop - wh) / (top+height);
|
||
|
|
} else {
|
||
|
|
|
||
|
|
distance = (scrolltop + wh) - top;
|
||
|
|
percentage = Math.round(distance / ((wh + height) / 100));
|
||
|
|
percent = percentage/100;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (top < wh) {
|
||
|
|
percent = percent * scrolltop / ((top + height) - wh);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return percent > 1 ? 1:percent;
|
||
|
|
}
|
||
|
|
});
|