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Phraseanet/www/include/jslibs/yui2.8/examples/carousel/csl_selection.html
2011-02-16 16:09:48 +01:00

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>YUI Library Examples: Carousel Control: Spotlight example</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
<style>
/*Supplemental CSS for the YUI distribution*/
#custom-doc { width: 95%; min-width: 950px; }
#pagetitle {background-image: url(../../assets/bg_hd.gif);}
</style>
<link rel="stylesheet" type="text/css" href="../../assets/dpSyntaxHighlighter.css">
<!--Script and CSS includes for YUI dependencies on this page-->
<link rel="stylesheet" type="text/css" href="../../build/carousel/assets/skins/sam/carousel.css" />
<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
<script type="text/javascript" src="../../build/yuiloader/yuiloader-min.js"></script>
<script type="text/javascript" src="../../build/dom/dom-min.js"></script>
<script type="text/javascript" src="../../build/event/event-min.js"></script>
<script type="text/javascript" src="../../build/element/element-min.js"></script>
<script type="text/javascript" src="../../build/carousel/carousel-min.js"></script>
<script type="text/javascript" src="../../build/button/button-min.js"></script>
<!--begin custom header content for this example-->
<style type="text/css">
#container {
margin: 0 auto;
}
/* Style the spotlight container */
#spotlight {
border: 1px solid #ccc;
height: 180px;
margin: 10px auto;
padding: 1px;
width: 240px;
}
/* Always be sure to give your carousel items a width and a height */
.yui-carousel-element li {
height: 75px;
opacity: 0.6;
width: 75px;
opacity: 0.6;
}
.yui-carousel-element .yui-carousel-item-selected {
opacity: 1;
}
</style>
<!--end custom header content for this example-->
<script type="text/javascript">
//enable passthrough of errors from YUI Event:
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
YAHOO.util.Event.throwErrors = true;
}
</script>
</head>
<body id="yahoo-com" class="yui-skin-sam">
<div id="custom-doc" class="yui-t2">
<div id="hd">
<div id="ygunav">
<p><em><a href="http://developer.yahoo.com/yui/">YUI Library Home</a></em></p>
<form action="http://search.yahoo.com/search" id="sitesearchform">
<input name="vs" type="hidden" value="developer.yahoo.com">
<input name="vs" type="hidden" value="yuiblog.com">
<div id="sitesearch">
<label for="searchinput">Site Search (YDN &amp; YUIBlog): </label>
<input type="text" id="searchinput" name="p">
<input type="submit" value="Search" id="searchsubmit" class="ygbt">
</div>
</form> </div>
<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
<div id="pagetitle"><h1>YUI Library Examples: Carousel Control: Spotlight example</h1></div>
</div>
<div id="bd">
<div id="yui-main">
<div class="yui-b">
<div class="yui-ge">
<div class="yui-u first example">
<div class="promo">
<h1>Carousel Control: Spotlight example</h1>
<div class="exampleIntro">
<p>
This example uses the <a href="http://developer.yahoo.com/yui/carousel/">YUI Carousel Control</a> to showcase a simple spotlight
example using its <code>itemSelected</code> event. In this example, you can use arrow
keys to select items as well as click on an item to select it.
</p>
<p>
Though this functionality looks a little complicated, it is very easy to
implement. This is because the YUI Carousel Control handles the keyboard
event and the mouse click event for setting the selection. When an item is
selected, the YUI Carousel Control triggers an <code>itemSelected</code> event. This
example subscribes to the <code>itemSelected</code> event to display the selected
image in the spotlight.
</p>
</div>
<div class="example-container module ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="csl_selection_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<!-- The Carousel container -->
<div id="container">
<ol id="carousel">
<li>
<img src="http://farm1.static.flickr.com/135/342099636_7b05b7cde5_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/136/342099938_fdef3ca3b5_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/147/342099522_3827eaa929_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/143/342100011_ec4d338c71_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/161/342100080_0fe4f9ccb0_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/153/342100324_82589c0ebe_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/147/342100376_d0336252a7_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/156/342100472_b9bc985fa4_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/133/342100566_39dae4698f_s.jpg">
</li>
</ol>
</div>
<!-- The spotlight container -->
<div id="spotlight"></div>
<script>
(function () {
// Get the image link from within its (parent) container.
function getImage(parent) {
var el = parent.firstChild;
while (el) { // walk through till as long as there's an element
if (el.nodeName.toUpperCase() == "IMG") { // found an image
// flickr uses "_s" suffix for small, and "_m" for big
// images respectively
return el.src.replace(/_s\.jpg$/, "_m.jpg");
}
el = el.nextSibling;
}
return "";
}
YAHOO.util.Event.onDOMReady(function (ev) {
var spotlight = YAHOO.util.Dom.get("spotlight"),
carousel = new YAHOO.widget.Carousel("container");
carousel.on("itemSelected", function (index) {
// item has the reference to the Carousel's item
var item = carousel.getElementForItem(index);
if (item) {
spotlight.innerHTML = "<img src=\""+getImage(item)+"\">";
}
});
carousel.render(); // get ready for rendering the widget
carousel.show(); // display the widget
});
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Using the Carousel Control to Spotlight the Selected Item</h2>
<p>
Here we will use the <a href="http://developer.yahoo.com/yui/carousel/">YUI Carousel Control</a>'s <code>itemSelected</code> event to display
the selected image.</p>
<p>
This example has the following dependencies:
</p>
<textarea name="code" class="HTML" cols="60" rows="1"><link type="text/css" rel="stylesheet" href="http://yui.yahooapis.com/2.8.2r1/build/carousel/assets/skins/sam/carousel.css">
<script src="http://yui.yahooapis.com/2.8.2r1/build/yahoo/yahoo-dom-event.js"></script>
<script src="http://yui.yahooapis.com/2.8.2r1/build/element/element-min.js"></script>
<script src="http://yui.yahooapis.com/2.8.2r1/build/carousel/carousel-min.js"></script></textarea>
<p>
This example uses progressive enhancement; the Carousel is created
from an ordered list.
</p>
<textarea name="code" class="HTML" cols="60" rows="1"><div id="container">
<ol>
<li>
<img src="http://farm1.static.flickr.com/135/342099636_7b05b7cde5_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/136/342099938_fdef3ca3b5_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/147/342099522_3827eaa929_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/143/342100011_ec4d338c71_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/161/342100080_0fe4f9ccb0_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/153/342100324_82589c0ebe_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/147/342100376_d0336252a7_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/156/342100472_b9bc985fa4_s.jpg">
</li>
<li>
<img src="http://farm1.static.flickr.com/133/342100566_39dae4698f_s.jpg">
</li>
</ol>
</div></textarea>
<p>
We will add a container element where we can display the spotlight image.
</p>
<textarea name="code" class="HTML" cols="60" rows="1"><div id="spotlight"></div></textarea>
<p>
We'll have only one (but necessary) CSS rule to set the height for the Carousel items.
</p>
<textarea name="code" class="CSS" cols="60" rows="1">/* Always be sure to give your carousel items a width and a height */
.yui-carousel-element li {
height: 75px;
width: 75px;
opacity: 0.6;
}
</textarea>
<p>
Since we have the elements in place, we can invoke the Carousel's
constructor to create the widget. After having the Carousel object, we can subscribe to the <code>itemSelected</code> event that it exposes.
This event is triggered whenever an item is selected and it returns the
index of the selected item. With the index of the item, we can use the
Carousel's <code>getElementForItem()</code> API to get the reference to the Carousel's item (an <code>li</code> element in
our case).
</p>
<textarea name="code" class="JScript" cols="60" rows="1">YAHOO.util.Event.onDOMReady(function (ev) {
var carousel = new YAHOO.widget.Carousel("container");
carousel.on("itemSelected", function (index) {
var item = carousel.getElementForItem(index);
if (item) {
spotlight.innerHTML = "<img src=\"" + getImage(item) + "\">";
}
});
carousel.render(); // get ready for rendering the widget
carousel.show(); // display the widget
});</textarea>
<p>
The getImage() function is quite easy to implement. Since we have the
reference to the Carousel's item, it is straightforward to implement a function that extracts the image within it.
</p>
<textarea name="code" class="JScript" cols="60" rows="1">// Get the image link from within its (parent) container.
function getImage(parent) {
var el = parent.firstChild;
while (el) { // walk through till as long as there's an element
if (el.nodeName.toUpperCase() == "IMG") { // found an image
// flickr uses "_s" suffix for small, and "_m" for big images respectively
return el.src.replace(/_s\.jpg$/, "_m.jpg");
}
el = el.nextSibling;
}
return "";
}</textarea>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?carousel&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
</div>
<div class="yui-u">
<div id="loggerModule" class="yui-skin-sam">
<h3 class="firstContent">YUI Logger Output:</h3>
<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p>
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="csl_selection_log.html">Reload with logging<br />
and debugging enabled.</a></span></span></p></div>
</div>
<div id="examples">
<h3>Carousel Control Examples:</h3>
<div id="exampleToc">
<ul>
<li class='selected'><a href='../carousel/csl_selection.html'>Spotlight example</a></li><li><a href='../carousel/csl_circular.html'>Circular Carousel example</a></li><li><a href='../carousel/csl_reveal.html'>Partially revealing previous and next items</a></li><li><a href='../carousel/csl_imagentext.html'>Using both images and text within an item</a></li><li><a href='../carousel/csl_dynload2.html'>Using Ajax for deferred loading of items</a></li><li><a href='../carousel/csl_dynloadandreplace.html'>Using deferred loading of items and Carousel's built-in paginator</a></li><li><a href='../carousel/csl_multirow.html'>Multi-row example</a></li><li><a href='../carousel/csl_paginationtemplate.html'>Pagination template example</a></li><li><a href='../carousel/csl_pagination.html'>Using Paginator with Carousel</a></li><li><a href='../carousel/carousel-ariaplugin.html'>Using the Carousel ARIA Plugin</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Carousel Control Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/carousel/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_carousel.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/carousel.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
</div>
</div>
</div>
</div>
<div class="yui-b" id="tocWrapper">
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