Javascript Resize to reset variables - javascript

I'm trying to have a bunch of variables reset themselves on a resize (I'm just a little crazy like that. Yes, I know virtually no one will do it as their using the page). I want to be able to have the plugin that I created (hScroll) reset it's variables when the user resizes the page. I only want to declare them and set them within one line, so I tried using the window.variableName = ... but that didn't seem to work. Once again, all I want to be able to do is have to declare and set the variable within one line, and on resize, have the variables reestablish themselves, since a few are size dependent. As you can see, I have also tried the triggerHandler method as well, but it does not seem to be working.
(function($) {
$.fn.extend({
hScroll: function(options) {
var defaults = {
container: "nav",
sliderName: ".sliderName",
partContainer: ".beep"
};
var o = $.extend(defaults, options);
return this.each(function() {
// I want to set global variables and have them reset... START
var slider = $(o.container + " " + o.sliderName),
sliderWidth = slider.outerWidth(),
container = $(o.container),
containerWidth = container.outerWidth(),
containerInnerWidth = containerWidth - (2 * parseInt(container.css("padding-left"))),
sliderPieces = slider.children(o.partContainer),
numberOfPieces = sliderPieces.length,
containerWidth = $(o.container).width(),
piecesWidth = 0;
// set slide widths
if (containerInnerWidth > sliderWidth / numberOfPieces) {
piecesWidth = sliderWidth / numberOfPieces
} else {
piecesWidth = containerInnerWidth;
}
sliderPieces.width(piecesWidth);
// set gutter and how many pieces can be seen at once.
var wholePiecesSeen = Math.floor(containerInnerWidth / piecesWidth),
gutter = parseInt((containerInnerWidth - (wholePiecesSeen * piecesWidth)) / 2);
// END - I want this block to be reset when the window is resized.
var isContainerBigEnough = function() {
if (containerInnerWidth > sliderWidth) {
$(o.container).removeClass("tooBig");
} else {
$(o.container).addClass("tooBig");
}
}
isContainerBigEnough();
// arrow variables
$(o.container + " .previous").click(function() {
var addOn = 0,
newPosition = 0,
thisFarGone = parseInt(slider.css("left")),
moveThisFar = piecesWidth,
allTheWay = containerInnerWidth - sliderWidth;
// always make sure to center your tiles
if (thisFarGone == allTheWay) {
moveThisFar = moveThisFar - gutter;
console.log(moveThisFar);
console.log("in");
};
newPosition = -thisFarGone - moveThisFar;
//make sure it doesn't go too far
if (newPosition < 0) {
newPosition = 0;
}
newPosition = parseInt(newPosition); // - addOn);
slider.css({
"left": (-newPosition) + "px"
});
});
$(o.container + " .next").click(function() {
var addOn = 0,
newPosition = 0,
thisFarGone = parseInt(slider.css("left")),
moveThisFar = piecesWidth;
// always make sure to center your tiles
if (thisFarGone == 0 ||
thisFarGone == -0 ||
thisFarGone == undefined) {
moveThisFar = moveThisFar - gutter;
};
newPosition = moveThisFar - thisFarGone;
//make sure it doesn't go too far
if (newPosition > sliderWidth - containerInnerWidth) {
newPosition = sliderWidth - containerInnerWidth;
}
newPosition = parseInt(newPosition); // - addOn);
slider.css({
"left": (-newPosition) + "px"
});
});
$(window).resize(function() {
console.log("working");
$(o.container).triggerHandler("hScroll");
});
});
}
});
})(jQuery);
$(document).ready(function() {
$(".posts-timeline").hScroll({
container: ".posts-timeline",
sliderName: "#slider",
partContainer: ".post"
});
});

Something like this?
console.log("working");
$(o.container).hScroll("hScroll");
Maybe not exactly that, but if you want those variables to be reassigned, I'm guessing that would wind up being done somewhere in $(window).resize(function() {

Related

horizontal timeline fixed distance and centered on mobile devices

I am trying to reach a horizontal timeline like this:
https://codepen.io/ritz078/pen/LGRWjE
My problem is, that I've got no real dates (DD/MM/YYYY) but only years like 1998-2002 or just 2009. So there is a problem, I am struggling to fix, which ends up like this:
So my aims are:
Set a fixed distance between elements
Make it work just with years
When on a device less than 768px wide ensure a single element is displayed and it appears in the center
This is my solution for 3., but the other things, I couldnt solute:
if ($(window).width() < 768 {
eventsMinDistance = $('.cd-horizontal-timeline .events-wrapper').width(/2;)
}
(timelines.length > 0) && initTimeline(timelines);
$(window).resize(function(){
if ($(window).width() < 768 {
eventsMinDistance = $('.cd-horizontal-timeline .events-wrapper').width(/2;)
} else{
eventsMinDistance = 155;
}
}
Do you guys know how do adjust it, as I am struggling since hours without any success. Thank you very much for your help!
the first part of your code works fine, but it was faulty on the syntax, I fixed it and use it and also add a couple of changes to acomplished the desired fixed width amount between each date.
Actually it was pretty easy, when you debug and you know exactly what the developer wants to do.
This is the code I wrote:
jQuery(document).ready(function($){
var timelines = $('.cd-horizontal-timeline'),
eventsRelativeDistance = false;
if ($(window).width() < 768) {
eventsMinDistance = Number($('.cd-horizontal-timeline .events-wrapper').width())/2;
}else{
var eventsMinDistance = 100;
}
(timelines.length > 0) && initTimeline(timelines);
$(window).resize( function(){
if ($(window).width() < 768) {
eventsMinDistance = Number($('.cd-horizontal-timeline .events-wrapper').width())/2;
} else{
eventsMinDistance = 100;
}
});
function initTimeline(timelines) {
timelines.each(function(){
var timeline = $(this),
timelineComponents = {};
//cache timeline components
timelineComponents['timelineWrapper'] = timeline.find('.events-wrapper');
timelineComponents['eventsWrapper'] = timelineComponents['timelineWrapper'].children('.events');
timelineComponents['fillingLine'] = timelineComponents['eventsWrapper'].children('.filling-line');
timelineComponents['timelineEvents'] = timelineComponents['eventsWrapper'].find('a');
timelineComponents['timelineDates'] = parseDate(timelineComponents['timelineEvents']);
timelineComponents['eventsMinLapse'] = minLapse(timelineComponents['timelineDates']);
timelineComponents['timelineNavigation'] = timeline.find('.cd-timeline-navigation');
timelineComponents['eventsContent'] = timeline.children('.events-content');
if(!eventsRelativeDistance){
// Set up space to store the distance in pixels.
timelineComponents['distanceInPx'] = [];
}
//assign a left postion to the single events along the timeline
setDatePosition(timelineComponents, eventsMinDistance, eventsRelativeDistance);
//assign a width to the timeline
var timelineTotWidth = setTimelineWidth(timelineComponents, eventsMinDistance, eventsRelativeDistance);
//the timeline has been initialize - show it
timeline.addClass('loaded');
//detect click on the next arrow
timelineComponents['timelineNavigation'].on('click', '.next', function(event){
event.preventDefault();
updateSlide(timelineComponents, timelineTotWidth, 'next');
});
//detect click on the prev arrow
timelineComponents['timelineNavigation'].on('click', '.prev', function(event){
event.preventDefault();
updateSlide(timelineComponents, timelineTotWidth, 'prev');
});
//detect click on the a single gallery - show new gallery content
timelineComponents['eventsWrapper'].on('click', 'a', function(event){
event.preventDefault();
timelineComponents['timelineEvents'].removeClass('selected');
$(this).addClass('selected');
updateOlderEvents($(this));
updateFilling($(this), timelineComponents['fillingLine'], timelineTotWidth);
updateVisibleContent($(this), timelineComponents['eventsContent']);
});
//on swipe, show next/prev gallery content
timelineComponents['eventsContent'].on('swipeleft', function(){
var mq = checkMQ();
( mq == 'mobile' ) && showNewContent(timelineComponents, timelineTotWidth, 'next');
});
timelineComponents['eventsContent'].on('swiperight', function(){
var mq = checkMQ();
( mq == 'mobile' ) && showNewContent(timelineComponents, timelineTotWidth, 'prev');
});
//keyboard navigation
$(document).keyup(function(event){
if(event.which=='37' && elementInViewport(timeline.get(0)) ) {
showNewContent(timelineComponents, timelineTotWidth, 'prev');
} else if( event.which=='39' && elementInViewport(timeline.get(0))) {
showNewContent(timelineComponents, timelineTotWidth, 'next');
}
});
});
}
function updateSlide(timelineComponents, timelineTotWidth, string) {
//retrieve translateX value of timelineComponents['eventsWrapper']
var translateValue = getTranslateValue(timelineComponents['eventsWrapper']),
wrapperWidth = Number(timelineComponents['timelineWrapper'].css('width').replace('px', ''));
//translate the timeline to the left('next')/right('prev')
(string == 'next')
? translateTimeline(timelineComponents, translateValue - wrapperWidth + eventsMinDistance, wrapperWidth - timelineTotWidth)
: translateTimeline(timelineComponents, translateValue + wrapperWidth - eventsMinDistance);
}
function showNewContent(timelineComponents, timelineTotWidth, string) {
//go from one gallery to the next/previous one
var visibleContent = timelineComponents['eventsContent'].find('.selected'),
newContent = ( string == 'next' ) ? visibleContent.next() : visibleContent.prev();
if ( newContent.length > 0 ) { //if there's a next/prev gallery - show it
var selectedDate = timelineComponents['eventsWrapper'].find('.selected'),
newEvent = ( string == 'next' ) ? selectedDate.parent('li').next('li').children('a') : selectedDate.parent('li').prev('li').children('a');
updateFilling(newEvent, timelineComponents['fillingLine'], timelineTotWidth);
updateVisibleContent(newEvent, timelineComponents['eventsContent']);
newEvent.addClass('selected');
selectedDate.removeClass('selected');
updateOlderEvents(newEvent);
updateTimelinePosition(string, newEvent, timelineComponents);
}
}
function updateTimelinePosition(string, event, timelineComponents) {
//translate timeline to the left/right according to the position of the selected gallery
var eventStyle = window.getComputedStyle(event.get(0), null),
eventLeft = Number(eventStyle.getPropertyValue("left").replace('px', '')),
timelineWidth = Number(timelineComponents['timelineWrapper'].css('width').replace('px', '')),
timelineTotWidth = Number(timelineComponents['eventsWrapper'].css('width').replace('px', ''));
var timelineTranslate = getTranslateValue(timelineComponents['eventsWrapper']);
if( (string == 'next' && eventLeft > timelineWidth - timelineTranslate) || (string == 'prev' && eventLeft < - timelineTranslate) ) {
translateTimeline(timelineComponents, - eventLeft + timelineWidth/2, timelineWidth - timelineTotWidth);
}
}
function translateTimeline(timelineComponents, value, totWidth) {
var eventsWrapper = timelineComponents['eventsWrapper'].get(0);
value = (value > 0) ? 0 : value; //only negative translate value
value = ( !(typeof totWidth === 'undefined') && value < totWidth ) ? totWidth : value; //do not translate more than timeline width
setTransformValue(eventsWrapper, 'translateX', value+'px');
//update navigation arrows visibility
(value == 0 ) ? timelineComponents['timelineNavigation'].find('.prev').addClass('inactive') : timelineComponents['timelineNavigation'].find('.prev').removeClass('inactive');
(value == totWidth ) ? timelineComponents['timelineNavigation'].find('.next').addClass('inactive') : timelineComponents['timelineNavigation'].find('.next').removeClass('inactive');
}
function updateFilling(selectedEvent, filling, totWidth) {
//change .filling-line length according to the selected gallery
var eventStyle = window.getComputedStyle(selectedEvent.get(0), null),
eventLeft = eventStyle.getPropertyValue("left"),
eventWidth = eventStyle.getPropertyValue("width");
eventLeft = Number(eventLeft.replace('px', '')) + Number(eventWidth.replace('px', ''))/2;
var scaleValue = eventLeft/totWidth;
setTransformValue(filling.get(0), 'scaleX', scaleValue);
}
function setDatePosition(timelineComponents, min, relativeDistance) {
var distance,
distanceNorm = 0,
distancesInPx =[];
for (i = 0; i < timelineComponents['timelineDates'].length; i++) {
if (relativeDistance){
distance = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][i]);
distanceNorm = Math.round(distance/timelineComponents['eventsMinLapse']) + 2;
}else{
distance = 5;
distanceNorm = Math.round(distance/timelineComponents['eventsMinLapse']) + 2 + distanceNorm;
// Save am array of sizes to track the distance in pixels from the left.
timelineComponents['distanceInPx'].push(distanceNorm*min);
}
timelineComponents['timelineEvents'].eq(i).css('left', distanceNorm*min+'px');
}
}
function setTimelineWidth(timelineComponents, width, relativeDistance) {
var timeSpan = 0, timeSpanNorm, totalWidth;
if(relativeDistance){
// If relative Time Distance daydiff caclulates the first date and the last one.
timeSpan = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][timelineComponents['timelineDates'].length-1]);
timeSpanNorm = timeSpan/timelineComponents['eventsMinLapse'];
timeSpanNorm = Math.round(timeSpanNorm) + 4;
totalWidth = timeSpanNorm*width;
}else{
// However if no relative Distance we obtain the amount of distance in pixels from the last position of the array which is the farthest element on the array.
totalWidth = timelineComponents['distanceInPx'][timelineComponents['distanceInPx'].length-1];
}
timelineComponents['eventsWrapper'].css('width', totalWidth+'px');
updateFilling(timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents['fillingLine'], totalWidth);
updateTimelinePosition('next', timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents);
return totalWidth;
}
function updateVisibleContent(event, eventsContent) {
var eventDate = event.data('date'),
visibleContent = eventsContent.find('.selected'),
selectedContent = eventsContent.find('[data-date="'+ eventDate +'"]'),
selectedContentHeight = selectedContent.height();
if (selectedContent.index() > visibleContent.index()) {
var classEnetering = 'selected enter-right',
classLeaving = 'leave-left';
} else {
var classEnetering = 'selected enter-left',
classLeaving = 'leave-right';
}
selectedContent.attr('class', classEnetering);
visibleContent.attr('class', classLeaving).one('webkitAnimationEnd oanimationend msAnimationEnd animationend', function(){
visibleContent.removeClass('leave-right leave-left');
selectedContent.removeClass('enter-left enter-right');
});
eventsContent.css('height', selectedContentHeight+'px');
}
function updateOlderEvents(event) {
event.parent('li').prevAll('li').children('a').addClass('older-gallery').end().end().nextAll('li').children('a').removeClass('older-gallery');
}
function getTranslateValue(timeline) {
var timelineStyle = window.getComputedStyle(timeline.get(0), null),
timelineTranslate = timelineStyle.getPropertyValue("-webkit-transform") ||
timelineStyle.getPropertyValue("-moz-transform") ||
timelineStyle.getPropertyValue("-ms-transform") ||
timelineStyle.getPropertyValue("-o-transform") ||
timelineStyle.getPropertyValue("transform");
if( timelineTranslate.indexOf('(') >=0 ) {
var timelineTranslate = timelineTranslate.split('(')[1];
timelineTranslate = timelineTranslate.split(')')[0];
timelineTranslate = timelineTranslate.split(',');
var translateValue = timelineTranslate[4];
} else {
var translateValue = 0;
}
return Number(translateValue);
}
function setTransformValue(element, property, value) {
element.style["-webkit-transform"] = property+"("+value+")";
element.style["-moz-transform"] = property+"("+value+")";
element.style["-ms-transform"] = property+"("+value+")";
element.style["-o-transform"] = property+"("+value+")";
element.style["transform"] = property+"("+value+")";
}
//based on http://stackoverflow.com/questions/542938/how-do-i-get-the-number-of-days-between-two-dates-in-javascript
function parseDate(events) {
var dateArrays = [];
events.each(function(){
var singleDate = $(this),
dateComp = singleDate.data('date').split('T');
if( dateComp.length > 1 ) { //both DD/MM/YEAR and time are provided
var dayComp = dateComp[0].split('/'),
timeComp = dateComp[1].split(':');
} else if( dateComp[0].indexOf(':') >=0 ) { //only time is provide
var dayComp = ["2000", "0", "0"],
timeComp = dateComp[0].split(':');
} else { //only DD/MM/YEAR
var dayComp = dateComp[0].split('/'),
timeComp = ["0", "0"];
}
var newDate = new Date(dayComp[2], dayComp[1]-1, dayComp[0], timeComp[0], timeComp[1]);
dateArrays.push(newDate);
});
return dateArrays;
}
function daydiff(first, second) {
return Math.round((second-first));
}
function minLapse(dates) {
//determine the minimum distance among events
var dateDistances = [];
for (i = 1; i < dates.length; i++) {
var distance = daydiff(dates[i-1], dates[i]);
dateDistances.push(distance);
}
return Math.min.apply(null, dateDistances);
}
/*
How to tell if a DOM element is visible in the current viewport?
http://stackoverflow.com/questions/123999/how-to-tell-if-a-dom-element-is-visible-in-the-current-viewport
*/
function elementInViewport(el) {
var top = el.offsetTop;
var left = el.offsetLeft;
var width = el.offsetWidth;
var height = el.offsetHeight;
while(el.offsetParent) {
el = el.offsetParent;
top += el.offsetTop;
left += el.offsetLeft;
}
return (
top < (window.pageYOffset + window.innerHeight) &&
left < (window.pageXOffset + window.innerWidth) &&
(top + height) > window.pageYOffset &&
(left + width) > window.pageXOffset
);
}
function checkMQ() {
//check if mobile or desktop device
return window.getComputedStyle(document.querySelector('.cd-horizontal-timeline'), '::before').getPropertyValue('content').replace(/'/g, "").replace(/"/g, "");
}
});
Did you ever get this to work?? Have come across the same problem. If i change the default distance from 60 to 1 the gap between is not enough and the whole timeline breaks. The calculations for the distance as described in the article is as follows
First of all, in the main.js file, we set a minimum distance between two consecutive dates, using the eventsMinDistance variable; in our case, we set eventsMinDistance = 60 (so the minimum distance will be 60px). Then we evaluate all the differences between a date and the following one; to do that we use the data-date attribute added to each date. The minimum difference is then used as a reference to evaluate the distances between two consecutive dates.
For example, let's suppose the minimum found difference is 5 days; that means that the distance, along the timeline, between two dates separated by a lapse of 5days will be 60px, while the one between two events separated by a lapse of 10 days will be 120px.
source:: www.codyhouse.org
From what i read the min distance is here:~
var timelines = $('.cd-horizontal-timeline'),
eventsMinDistance = 60;
(timelines.length > 0) && initTimeline(timelines);
This creates a variable called timelines and sets it to the class .cd-hor... and sets the min distance to 60px. changing this to 1 breaks the application as the distance between the times are too small.
function setDatePosition(timelineComponents, min) {
for (i = 0; i < timelineComponents['timelineDates'].length; i++) {
var distance = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][i]),
distanceNorm = Math.round(distance/timelineComponents['eventsMinLapse']) + 2;
timelineComponents['timelineEvents'].eq(i).css('left', distanceNorm*min+'px');
}
}
I might be wrong but here is the section calculating the distance and the last distanceNorm*min+'px'. min i believe is 60 and distance norm is the calculation of the 5 days etc. if you remove distance norm the app breaks so you cant just add min+'px' this is because you remove the original distance.
All distances are calculated from the first timeline. Thats why the app breaks. Need to find the code that tells which to calc from which is the
var distance = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][i]),
distanceNorm = Math.round(distance/timelineComponents['eventsMinLapse']) + 2;
this sets distance as the first element of the index and then for each timelineDates within the loop [i].
I've been at it for days but have come to the conclusion the tutorial is good as is but it is not a library and should be used as reference to write your own from scratch which is what i am now doing.
If you did ever manage it though please update as so far i managed to manipulate the dates to get equal spacing but if you insert too many it breaks which is no good hence the rewrite!

JS/Jquery Random Position of divs

This has been asked before and I got my code running.
The problem is with some weird viewport sizes the script seems to freeze.
There is nothing you can do but kill the tab.
I tried to script some backup that will kill the loop if its frozen, but it does not seem to get the job done.
Can anyone tell me whats wrong? Or show me an error in the script in general thats causing the freeze?
Thats the site where the code is running:
http://unkn0wn3d.com
JS Code is eithere there:
http://unkn0wn3d.com/css/pos.js
or here:
var pos = function(){
var containerW = $("article").width();
var containerH = $("article").height();
var langH = parseInt($( ".languages" ).position().top + $( ".languages" ).height());
var langW = parseInt($( ".languages" ).position().left + $( ".languages" ).width());
var creditW = parseInt($( ".credit" ).position().left - $(".link:first").width() + 15);
var positions = [];
var froze = false;
setTimeout(function(){froze=true;}, 2000)
$('.link').each(function() {
var coords = {
w: $(this).outerWidth(true)+5,
h: $(this).outerHeight(true)+5
};
var success = false;
while (!success)
{
coords.x = parseInt(Math.random() * (containerW-coords.w));
coords.y = parseInt(Math.random() * (containerH-coords.h));
var success = true;
$.each(positions, function(){
if (froze){return false;}
if (
(coords.x <= langW &&
coords.y <= langH) ||
(coords.x >= creditW &&
coords.y <= langH) ||
(coords.x <= (this.x + this.w) &&
(coords.x + coords.w) >= this.x &&
coords.y <= (this.y + this.h) &&
(coords.y + coords.h) >= this.y)
)
{
success = false;
}
});
}
positions.push(coords);
$(this).css({
top: coords.y + 'px',
left: coords.x + 'px',
display: 'block'
});
})};
var waitForFinalEvent = (function () {
var timers = {};
return function (callback, ms, uniqueId) {
if (!uniqueId) {
uniqueId = "Don't call this twice without a uniqueId";
}
if (timers[uniqueId]) {
clearTimeout (timers[uniqueId]);
}
timers[uniqueId] = setTimeout(callback, ms);
};
})();
$(document).ready(
pos()
);
$(window).resize(function () {
waitForFinalEvent(function(){pos();}, 500, "resize");
});
You have 2 problems. I don't see where you are doing it, but the size of your A.link elements is being controlled only by the height of the viewport. So if the viewport is tall and narrow, then the links are large, and it's simply impossible to fit them all.
The second problem is that if the links can't be placed your code just keeps trying forever. The timer will never fire because the main script is still busy running. Rather than just do
while (!success)
it would be better to do a limited number of attempts:
var success = false;
for (var attempt = 0; !success && attempt < 50; attempt++)
{
....
}
By limiting the number of tries it will stop it freezing, even if the links are left overlapping. Then you can remove froze and the timer.
Even better would be to introduce a tolerance as the number of attempts increases - so they are allowed to overlap a little bit.
Your while loop never terminates since inside it you wrote var success = true
You redefined your success variable again by using var, so now you have 2 instances of success and the first one is never set to true so the loop never terminates. Try removing var from var success = true

jQuery: change class after conditional is met

I created this site where you have multiple sliders moving vertically using this example on stackoverflow > here < along with this fiddle.
The site when loaded has an overflow: hidden on the body and position fixed on my main content div(div class="content-fs row"). The idea is that when you first arrive on the page, you scroll through each slide and once you hit the last one, the position changes on the main content div(div class="content-fs row") from fixed to static and the overflow: hidden is removed from the body. I'm having trouble writing the conditional statement that says "if its the last slider, change the position." The jquery below is the code i'm using for the site along with the conditional statement that doesn't work.
Any pointers/advice would be greatly appreciated!
jquery:
function scrollLax(){
/*
initialize
*/
var scrollDown = false;
var scrollUp = false;
var scroll = 0;
var $view = $('#portfolio');
var t = 0;
var h = $view.height() - 250;
$view.find('.portfolio-sliders').each(function() {
var $moving = $(this);
// position the next moving correctly
if($moving.hasClass('from-bottom')) {
$moving.css('top', h); // subtract t so that a portion of the other slider is showing
}
// make sure moving is visible
$moving.css('z-index', 10);
});
var $moving = $view.find('.portfolio-sliders:first-child');
$moving.css('z-index', 10);
/*
event handlers
*/
var mousew = function(e) {
var d = 0;
if(!e) e = event;
if (e.wheelDelta) {
d = -e.wheelDelta/3;
} else if (e.detail) {
d = e.detail/120;
}
parallaxScroll(d);
}
if (window.addEventListener) {
window.addEventListener('DOMMouseScroll', mousew, false);
}
window.onmousewheel = document.onmousewheel = mousew;
/*
parallax loop display loop
*/
window.setInterval(function() {
if(scrollDown)
parallaxScroll(4);
else if(scrollUp)
parallaxScroll(-4);
}, 50);
function parallaxScroll(scroll) {
// current moving object
var ml = $moving.position().left;
var mt = $moving.position().top;
var mw = $moving.width();
var mh = $moving.height();
// calc velocity
var fromBottom = false;
var vLeft = 0;
var vTop = 0;
if($moving.hasClass('from-bottom')) {
vTop = -scroll;
fromBottom = true;
}
// calc new position
var newLeft = ml + vLeft;
var newTop = mt + vTop;
// check bounds
var finished = false;
if(fromBottom && (newTop < t || newTop > h)) {
finished = true;
newTop = (scroll > 0 ? t : t + h);
}
// set new position
$moving.css('left', newLeft);
$moving.css('top', newTop);
// if finished change moving object
if(finished) {
// get the next moving
if(scroll > 0) {
$moving = $moving.next('.portfolio-sliders');
if($moving.length == 0)
$moving = $view.find('.portfolio-sliders:last');
//this is where I am trying to add the if conditional statement.
if ('.portfolio-sliders:last')
$('.content-fs.row').css({'position': 'static'});
if('.portfolio-sliders:last' && (mt == 0))
$('html, body').removeClass('overflow');
} else {
$moving = $moving.prev('.portfolio-sliders');
if($moving.length == 0)
$moving = $view.find('.portfolio-sliders:first-child');
//reverse the logic and if last slide change position
if('.portfolio-sliders:first-child')
$('.content-fs.row').css({'position': 'fixed'});
}
}
// for debug
//$('#direction').text(scroll + "/" + t + " " + ml + "/" + mt + " " + finished + " " + $moving.text());
}
}
Your code as it is simply asks whether .portfolio-sliders:last exists. Seems you should be doing:
if ($moving == $('.portfolio-sliders:last') )
or something along those lines, instead checking whether the active slide is the last.

Event on margin change

I have an element with animated top margin. I need to detect if it isn't too close from the border, and if it is, scroll parent div to lower position, to prevent animated element from hiding. Here is an example:
http://jsfiddle.net/zYYBR/5/
This green box shouldn't be below the red line after clicking the "down" button.
Do you mean this?
var new_margin;
var step = 75;
var limit = $("#max")[0].offsetTop;
$('#down').click(function() {
var goStep = step;
var elHeight = $("#animated")[0].offsetTop + $("#animated")[0].offsetHeight;
if((elHeight + step) > limit)
{
goStep = limit - elHeight;
}
new_margin = goStep + parseInt($('#animated').css('margin-top'));
$("#animated").animate({marginTop: new_margin}, 1000);
});
http://jsfiddle.net/zYYBR/8/
EDIT: Or maybe something like that (of course you can improve the calculation, because currently it's very buggy with scroll):
var new_margin;
var step = 75;
$('#down').click(function () {
scroll(1000);
});
var scrollTimer = null;
$("#container").bind("scroll", function () {
clearTimeout(scrollTimer);
scrollTimer = setTimeout(function () { scroll(1); }, 10);
});
function scroll(speed) {
var scrollStep, animationStep = step;
var currentBoxBottom = $("#animated")[0].offsetTop + $("#animated")[0].offsetHeight;
var nextCurrentBoxBottom = currentBoxBottom + step;
var limit = $("#max")[0].offsetTop + $("#container")[0].scrollTop;
if (nextCurrentBoxBottom > limit) {
if (limit >= $("#container")[0].scrollTop) {
scrollStep = $("#container")[0].scrollTop + nextCurrentBoxBottom - limit;
}
else {
scrollStep = $("#container")[0].scrollTop - nextCurrentBoxBottom - limit;
animationStep = nextCurrentBoxBottom - limit;
}
$("#container")[0].scrollTop = scrollStep;
}
new_margin = animationStep + parseInt($('#animated').css('margin-top'));
$("#animated").animate({ marginTop: new_margin }, speed);
}
http://jsfiddle.net/zYYBR/13/
Do you mean something like this?
I have the same visual result as Alex Dn did, but I added a little extra direction to what I think you're talking about. If it's what you're looking for I'll make updates:
var new_margin;
var step = 75;
var limit = $("#max")[0].offsetTop;
$('#down2').click(function() {
var anim = $("#animated");
var hrOff = $("#max").offset();
var thOff = anim.offset();
new_margin = Math.min(hrOff.top - thOff.top - anim.height(), 75);
console.log(new_margin, hrOff.top, thOff.top);
var st = 0;
if (new_margin < 75) {
st = 75 - new_margin;
//have container scroll by this much?
}
anim.animate({
marginTop: "+=" + new_margin
}, 1000);
});​
​
http://jsfiddle.net/zYYBR/10/

How to add scroll background effect to multiple elements with different settings?

In this demo http://www.htmldrive.net/items/demo/527/Animated-background-image-with-jQuery
This code is for one background only. I want to add multiple background with different direction and speed.
var scrollSpeed = 70;
var step = 1;
var current = 0;
var imageWidth = 2247;
var headerWidth = 800;
var restartPosition = -(imageWidth - headerWidth);
function scrollBg(){
current -= step;
if (current == restartPosition){
current = 0;
}
$('#header').css("background-position",current+"px 0");
}
var init = setInterval("scrollBg()", scrollSpeed);
Currently it has settings for
$('#header').css("background-position",current+"px 0");
In a website I want to use this effect on #footer or #content background also. but with different speed and direction.
And is there any better and more optimized jquery method to achieve same effect?
And can we get same effect using CSS 3, without javascript?
Just saw the OP's answer, but decided to post anyway:
I've created a jQuery plugin to do this:
(function($) {
$.fn.scrollingBackground = function(options) {
// settings and defaults.
var settings = options || {};
var speed = settings.speed || 1;
var step = settings.step || 1;
var direction = settings.direction || 'rtl';
var animStep;
// build up a string to pass to animate:
if (direction === 'rtl') {
animStep = "-=" + step + "px";
}
else if (direction === 'ltr') {
animStep = '+=' + step + "px";
}
var element = this;
// perform the animation forever:
var animate = function() {
element.animate({
backgroundPosition: animStep + " 0px"
}, speed, animate);
};
animate();
};
})(jQuery);
Usage:
$("#header").scrollingBackground({
speed: 50,
step: 50,
direction: 'ltr'
});
This is pretty basic, and assumes that you're background-repeat is 'repeat-x' on the element you call it on. This way, there's no need to reset the background position every so often.
Working example: http://jsfiddle.net/andrewwhitaker/xmtpr/
I could work out the following solution. Am not sure if it is efficient. Will wait for anyone to comment or provide a better option.
Till then...:
var scrollSpeed = 70;
var step = 1;
var current = 0;
var images =
[
{
imageWidth:2247,
imagePath:"images/image1"
},
{
imageWidth:1200,
imagePath:"images/image2"
}
]
var headerWidth = 800;
var imageRotateCount = 0;
var imagesLength = images.length;
$('#header').css("background-image", images[0].imagePath);
function scrollBg(){
var curIndex = imageRotateCount%imagesLength;
var curImage = images[curIndex];
current -= step;
var restartPosition = -(curImage.imageWidth - headerWidth);
if (current == restartPosition){
current = 0;
imageRotateCount++;
curIndex = imageRotateCount%imagesLength;
curImage = images[curIndex];
$('#header').css("background-image", curImage.imagePath);
}
$('#header').css("background-position",current+"px 0");
}
var init = setInterval("scrollBg()", scrollSpeed);

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