Homescreen Widgets
Current Apps - Task
Switching UI
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Captures device motion in the x, y, and z direction.
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CarouSlide is an easy-to-implement, flexible yet powerful jQuery plugin that allows you to create a wide range of different carousel and slideshow implentations, from a small and semantic list of HTML content.
Some of its optional features include:
Three types of animation: fade, slide vertically and slide horizontally
All you need to get going is:
$(".CarouSlide").CarouSlide();
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Add an infinite carousel on your site, the easy way. See a Demo here
<div id="viewport">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
<a id="previous">Previous</a>
<a id="next">Next</a>
<!--
ul/li structure can be replaced by any other html structure as div/div, div/span...
-->
/* Comments on styles purpose in the source code */
#viewport{
width: 240px;
overflow:hidden;
}
#viewport ul{
position: relative;
padding: 0;
}
#viewport li{
width: 100px;
height: 50px;
float: left;
list-style: none;
}
$('#viewport').carousel('#previous', '#next');
If you need to activate auto-scrolling on your carousel, simply simulate a click :
//The auto-scrolling function
function slide(){
$('#simpleNext').click();
}
//Launch the scroll every 2 seconds
var intervalId = window.setInterval(slide, 2000);
//On user click deactivate auto-scrolling
$('#previous, #simpleNext').click(
function(event){
if(event.originalEvent){
window.clearInterval(intervalId);
}
}
);
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First of all we need to prevent the default behavior of standard touch events. This is easily done adding preventDefault() to the touchmove event. Then initialize the iScroll object on DOMContentLoaded or on window load. Here an example:
function loaded() {
document.addEventListener('touchmove', function(e){ e.preventDefault(); });
myScroll = new iScroll('scroller');
}
document.addEventListener('DOMContentLoaded', loaded);
iScroll takes two parameters. The first is mandatory and is the ID of the element you want to scroll. The second is optional and can be used to pass additional parameters (see below).
On the HTML/CSS side the scrolling area needs to be wrapped by an element which determines the scroller actual size. The following is a common tags configuration for an iScroll.
<div id="wrapper">
<div id="scroller">
<ul>
<li>...</li>
</ul>
</div>
</div>
The #wrapper also needs some classes:
#wrapper {
position:relative;
z-index:1;
width:/* your desired width, auto and 100% are fine */;
height:/* element height */;
overflow:/* hidden|auto|scroll */;
}
That’s it. Enjoy your scrolling. Have a look at the source code of the online example to get a better idea of how the iScroll works.
The iScroll syntax is: iScroll(mixed element_id, object options).
element_id, can be both an object pointing to or a string with the ID name of the element to be scrolled. Example: iScroll(document.getElementsByTagName('div')[1]) or iScroll('scroller')
Accepted options are:
false to never show the horizontal scrollbar. The default value true makes the iScroll smartly decide when the scrollbar is needed. Note that if device does not support translate3d hScrollbar is set to false by default.
false to never show the vertical bar. The default value true makes the iScroll smartly decide when the scrollbar is needed. Note that if device does not support translate3d vScrollbar is set to false by default.
false to prevent the scroller to bounce outside of boundaries (Android behavior). Default true (iPhone behavior).
true the scroller stops bouncing if the content is smaller than the visible area. Default: false (as per native iphone scroll).
false to prevent auto refresh on DOM changes. If you switch off this feature you have to call iScroll.refresh() function programmatically every time the DOM gets modified. If your code makes many subsequent DOM modifications it is suggested to set checkDOMChanges to false and to refresh the iScroll only once (ie: when all changes have been done). Default true.
true on iPhone, false on Android. Set to false for better performance.
false to remove the deceleration effect on swipe. Default true on devices that support translate3d.
false to remove the shrinking scrollbars when content is dragged over the boundaries. Default true on iPhone, false on Android. It has no impact on performances.
true to have the script behave on desktop webkit (Safari and Chrome) as it were a touch enabled device.
true to activate snap scroll.
'rgba(0,0,0,0.5)' Note: options must be sent as object not string. Eg:
myScroll = new iScroll(’scroller’, { checkDOMChanges: false, bounce: false, momentum: false });
When calling iScroll with “snap” option the scrolling area is subdivided into pages and whenever you swipe the scroll position will always snap to the page. Have a look at the screencast to get an idea.
Probably the best way to use “snap” is by calling it without momentum and scrollbars:
new iScroll('scroller', { snap:true, momentum:false, hScrollbar:false, vScrollbar:false });
If you keep momentum, you get a free-scrolling that will always stop to prefixed positions.
To have a perfect snapping experience the scrolling area should be perfectly divisible by the container size. Eg: If the container width is 200px and you have 10 elements, the whole scroller should be 2000px wide. This is not mandatory as iScroll doesn’t break if the last page is smaller than the container.
setTimeout. Eg: setTimeout(function () { myScroll.refresh() }, 0).
el must be a CSS3 selector. Eg: scrollToElement("#elementID", '400ms').
pageX and pageY can be an integer or prev/next. Two keywords that snap to previous or next page in the raw. The “carousel” example in the zip file is a good starting point on using the snap feature.
full set to true, the scroller is also removed from the DOM. DOM Changes – If scrolling doesn’t work after an ajax call and DOM change, try to initialize iScroll with checkDOMChanges: false and call refresh() function once the DOM modifications have been done. If this still doesn’t work try to put refresh() inside a 0ms setTimeout. Eg:
setTimeout(function () { myScroll.refresh(); }, 0);
Performance – CSS animations are heavy on the small device CPU. When too many elements are loaded into the scrolling area expect choppy animation. Try to reduce the number of tags inside the scrolling area to the minimum. Try to use just ULs for lists and Ps for paragraphs. Remember that you don’t actually need an anchor to create a button or send an action, so <li><a href="#" onclick="..." />text</a></li> is a waste of tags. You could remove the anchor and place the click event directly on the LI tag.
Try to avoid box-shadow and CSS gradients (especially on Android). I know they are cool and classy, but they don’t play well with CSS animations. Webkit on iPhone seems to handle shadows and gradients a bit better than its counterpart on Android, so you may selectively add/remove features based on the device.
Use a flat color for the #wrapper background, images in the scroller wrapper once again reduce performance.
Important: to preserve resources on devices that don’t support translate3d (namely: Android<2.0) iScroll disables momentum, scrollbars and bounce. You can however reactivate them using the respective options.
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