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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Chaining Animations Using <code>onComplete</code></title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts-min.css" />
<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="../../build/animation/animation-min.js"></script>
<script type="text/javascript" src="../../build/element/element-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">
#animator {
background-color:#003366;
color:#fff;
height:15em;
width: 15em;
position:relative;
margin:1em;
padding:1em;
}
</style>
<!--end custom header content for this example-->
</head>
<body class="yui-skin-sam">
<h1>Chaining Animations Using <code>onComplete</code></h1>
<div class="exampleIntro">
<p>A common use case for animation involves causing two or more animations to fire sequentially. This is known as <em>chaining</em>. It's easy to chain animations using the <a href="http://developer.yahoo.com/yui/animation/">YUI Animation Utility</a>'s custom events.</p>
<p>In this example, a color animation is set to fire <em>after</em> an animation of position. Click the button below to start the sequence.</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<!--markup for YUI Button Control-->
<span id="startAnim" class="yui-button yui-link-button">
<em class="first-child">
<a href="#" title="Click here to begin the chained animations.">Click here to begin the chained animations.</a>
</em>
</span>
<!--The animated element.-->
<div id="animator">
This element will animate position
and then color when you click the
button.
</div>
<script language="javascript">
//Setup the example once the animator div is present
//in the DOM.
YAHOO.util.Event.onAvailable("animator", function() {
//This is the first animation; this one will
//fire when the button is clicked.
var move = new YAHOO.util.Anim("animator", {
left: {from:0, to:75}
}, 1);
//This is the second animation; it will fire
//when the first animation is complete.
var changeColor = new YAHOO.util.ColorAnim("animator", {
backgroundColor: {from:"#003366", to:"#ff0000"}
}, 1);
//Here's the chaining glue: We subscribe to the
//first animation's onComplete event, and in
//our handler we animate the second animation:
move.onComplete.subscribe(function() {
changeColor.animate();
});
//Here we set up our YUI Button and subcribe to
//its click event. When clicked, it will
//animate the first animation:
var startAnim = new YAHOO.widget.Button("startAnim");
startAnim.subscribe("click", function() {
//reset the color value to the start so that
//the animation can be run multiple times:
YAHOO.util.Dom.setStyle("animator", "backgroundColor", "#003366");
move.animate();
});
//You can also make use of the onStart and onTween
//custom events in Animation; here, we'll log all
//of changeColor's custom events and peek at their
//argument signatures:
changeColor.onStart.subscribe(function() {
YAHOO.log("changeColor animation is starting.", "info", "example");
});
changeColor.onTween.subscribe(function(s, o) {
YAHOO.log("changeColor onTween firing with these arguments: " +
YAHOO.lang.dump(o), "info", "example");
});
changeColor.onComplete.subscribe(function(s, o) {
YAHOO.log("changeColor onComplete firing with these arguments: " +
YAHOO.lang.dump(o), "info", "example");
});
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</body>
</html>
|
