99 lines
3.1 KiB
JavaScript
99 lines
3.1 KiB
JavaScript
//
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// parralax.js
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//
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// Author:
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// Paul Schneider <paul@pschneider.fr>
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//
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// Copyright (c) 2015 GNU GPL
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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$(document).ready(function(){
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var $window = $(window);
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var $stwidth = $(window).width();
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var $stheight = $(window).height();
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var onPos = function (bgobj,ax,ay) {
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var speed = bgobj.data('speed');
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var dx=($window.scrollLeft()+ax-$stwidth/2)/speed;
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var dy=($window.scrollTop()+ay-$stheight/2)/speed;
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var xPos = bgobj.attr('orgbgpx') - Math.round( dx );
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var yPos = bgobj.attr('orgbgpy') - Math.round( dy );
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// Put together our final background position
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var coords = '' + xPos + bgobj.attr('orgbgpxu') + yPos + bgobj.attr('orgbgpyu');
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// Move the background
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bgobj.css({ backgroundPosition: coords });
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};
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var tiltLR=0;
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var titleFB=0;
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$('[data-type="background"]').each(function(){
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var $bgobj = $(this); // assigning the object
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// get the initial background position, assumes a "X% Yem" ?
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var orgpos = $bgobj.css('backgroundPosition');
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var bgpos = orgpos.split(" ");
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var bgposx = bgpos[0];
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var bgposy = bgpos[1];
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if (/%$/.test(bgposx)){
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bgposx = bgposx.substr(0,bgposx.length-1);
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$bgobj.attr('orgbgpxu','% ');
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}
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else if (/em$/.test(bgposx)){
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bgposx = bgposx.substr(0,bgposx.length-2);
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$bgobj.attr('orgbgpxu','em ');
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}
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else if (/px$/.test(bgposx)){
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bgposx = bgposx.substr(0,bgposx.length-2);
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$bgobj.attr('orgbgpxu','px ');
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}
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else { $bgobj.attr('orgbgpxu','px '); }
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if (/%$/.test(bgposy)){
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bgposy = bgposy.substr(0,bgposy.length-1);
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$bgobj.attr('orgbgpyu','% ');
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}
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else if (/em$/.test(bgposy)){
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bgposy = bgposy.substr(0,bgposy.length-2);
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$bgobj.attr('orgbgpyu','em ');
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}
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else if (/px$/.test(bgposy)){
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bgposy = bgposy.substr(0,bgposy.length-2);
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$bgobj.attr('orgbgpyu','px ');
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}
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else { $bgobj.attr('orgbgpyu','px '); }
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$bgobj.attr('orgbgpx',parseInt(bgposx));
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$bgobj.attr('orgbgpy',parseInt(bgposy));
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$(window).scroll(function() {
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onPos($bgobj,tiltLR,titleFB);
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});
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var nbevo=0;
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if (window.DeviceOrientationEvent) {
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if ($stwidth>320 && $stheight>320) {
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window.addEventListener('deviceorientation', function(event) {
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tiltLR = $stwidth*Math.sin(event.gamma*Math.PI/180);
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titleFB = $stheight*Math.sin(event.beta*Math.PI/90);
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onPos($bgobj,tiltLR,titleFB);
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},false); }
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$(window).mousemove(function(e) {
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tiltLR = e.pageX;
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titleFB = e.pageY;
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onPos($bgobj,e.pageX,e.pageY);
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});
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}
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});
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});
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