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+<!DOCTYPE html>
+<html lang="en">
+<head>
+ <meta charset="utf-8">
+ <title>Example: Reversing an Animation</title>
+ <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=PT+Sans:400,700,400italic,700italic">
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+<a href="https://github.com/yui/yui3"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
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+<div id="doc">
+ <div id="hd">
+ <h1><img src="http://yuilibrary.com/img/yui-logo.png"></h1>
+ </div>
+
+
+ <h1>Example: Reversing an Animation</h1>
+ <div class="yui3-g">
+ <div class="yui3-u-3-4">
+ <div id="main">
+ <div class="content"><link href="../assets/anim/anim.css" rel="stylesheet" type="text/css">
+<div class="intro">
+ <p>This demonstrates how to use the <code>reverse</code> attribute to change the behavior of the animation.</p>
+ <p> Click the icon in the header to toggle the element's <code>height</code>.</p>
+</div>
+
+<div class="example">
+<div id="demo" class="yui3-module">
+ <div class="yui3-hd">
+ <h3>Reversing an Animation</h3>
+ </div>
+ <div class="yui3-bd">
+ <p>Click the icon in the header to toggle the element's height.</p>
+ </div>
+</div>
+<p>This is placeholder text used to demonstrate how the above animation affects subsequent content.</p>
+
+
+<script type="text/javascript">
+YUI().use('anim', function(Y) {
+ var module = Y.one('#demo');
+
+ // add fx plugin to module body
+ var content = module.one('.yui3-bd').plug(Y.Plugin.NodeFX, {
+ from: { height: 0 },
+ to: {
+ height: function(node) { // dynamic in case of change
+ return node.get('scrollHeight'); // get expanded height (offsetHeight may be zero)
+ }
+ },
+
+ easing: Y.Easing.easeOut,
+ duration: 0.5
+ });
+
+ var onClick = function(e) {
+ e.preventDefault();
+ module.toggleClass('yui3-closed');
+ content.fx.set('reverse', !content.fx.get('reverse')); // toggle reverse
+ content.fx.run();
+ };
+
+ // use dynamic control for dynamic behavior
+ var control = Y.Node.create(
+ '<a title="collapse/expand element" class="yui3-toggle">' +
+ '<em>toggle</em>' +
+ '</a>'
+ );
+
+ // append dynamic control to header section
+ module.one('.yui3-hd').appendChild(control);
+ control.on('click', onClick);
+
+});
+</script>
+
+</div>
+
+<h2>Setting up the HTML</h2>
+<p>First we add some HTML to animate.</p>
+
+<pre class="code prettyprint"><div id="demo" class="yui3-module">
+ <div class="yui3-hd">
+ <h3>Reversing an Animation</h3>
+ </div>
+ <div class="yui3-bd">
+ <p>Click the icon in the header to toggle the element's height.</p>
+ </div>
+</div>
+<p>This is placeholder text used to demonstrate how the above animation affects subsequent content.</p></pre>
+
+
+<h2>Using the NodeFX Plugin</h2>
+<p>For this example, we will use <code>Node</code>'s <code>fx</code> plugin to animate the element. The plugin adds the anim instance to the <code>Node</code> instance, pre-configuring it to use the Node instance as the <code>Anim</code>'s node. The <code>plug</code> method accepts a class to construct and an optional config to pass to the constructor.</p>
+<p>Setting the <code>from</code> attribute to the expanded height of the element allows us to toggle the effect using the <code>reverse</code> attribute, which we will see below (<code>from</code> uses current value when omitted).</p>
+
+<pre class="code prettyprint">var module = Y.one('#demo');
+
+// add fx plugin to module body
+var content = module.one('.yui3-bd').plug(Y.Plugin.NodeFX, {
+ from: { height: 0 },
+ to: {
+ height: function(node) { // dynamic in case of change
+ return node.get('scrollHeight'); // get expanded height (offsetHeight may be zero)
+ }
+ },
+
+ easing: Y.Easing.easeOut,
+ from: { height: 0 },
+ duration: 0.5
+});</pre>
+
+
+<h2>Creating the Control Element</h2>
+<p>Because our behavior only works when JS is available, let's go ahead and add our control element using JS as well.</p>
+
+<pre class="code prettyprint">// use dynamic control for dynamic behavior
+var control = Y.Node.create(
+ '<a title="show/hide content" class="yui3-toggle">' +
+ '<em>toggle</em>' +
+ '</a>'
+);
+
+// append dynamic control to header section
+module.one('.yui3-hd').appendChild(control);</pre>
+
+
+<h2>Toggling Animation Behavior</h2>
+<p>Before calling <code>run</code> in our <code>click</code> handler, we will use the <code>reverse</code> attribute toggle the direction of the animation depending on whether its opening or closing.</p>
+
+<pre class="code prettyprint">var onClick = function(e) {
+ module.toggleClass('yui-closed');
+ content.fx.set('reverse', !content.fx.get('reverse')); // toggle reverse
+};</pre>
+
+
+<h2>Running the Animation</h2>
+<p>Finally we add an event handler to run the animation.</p>
+
+<pre class="code prettyprint">module.one('.yui3-toggle').on('click', onClick);</pre>
+
+
+<h2>Complete Example Source</h2>
+<pre class="code prettyprint"><div id="demo" class="yui3-module">
+ <div class="yui3-hd">
+ <h3>Reversing an Animation</h3>
+ </div>
+ <div class="yui3-bd">
+ <p>Click the icon in the header to toggle the element's height.</p>
+ </div>
+</div>
+<p>This is placeholder text used to demonstrate how the above animation affects subsequent content.</p>
+
+
+<script type="text/javascript">
+YUI().use('anim', function(Y) {
+ var module = Y.one('#demo');
+
+ // add fx plugin to module body
+ var content = module.one('.yui3-bd').plug(Y.Plugin.NodeFX, {
+ from: { height: 0 },
+ to: {
+ height: function(node) { // dynamic in case of change
+ return node.get('scrollHeight'); // get expanded height (offsetHeight may be zero)
+ }
+ },
+
+ easing: Y.Easing.easeOut,
+ duration: 0.5
+ });
+
+ var onClick = function(e) {
+ e.preventDefault();
+ module.toggleClass('yui3-closed');
+ content.fx.set('reverse', !content.fx.get('reverse')); // toggle reverse
+ content.fx.run();
+ };
+
+ // use dynamic control for dynamic behavior
+ var control = Y.Node.create(
+ '<a title="collapse/expand element" class="yui3-toggle">' +
+ '<em>toggle</em>' +
+ '</a>'
+ );
+
+ // append dynamic control to header section
+ module.one('.yui3-hd').appendChild(control);
+ control.on('click', onClick);
+
+});
+</script></pre>
+
+</div>
+ </div>
+ </div>
+
+ <div class="yui3-u-1-4">
+ <div class="sidebar">
+
+
+
+ <div class="sidebox">
+ <div class="hd">
+ <h2 class="no-toc">Examples</h2>
+ </div>
+
+ <div class="bd">
+ <ul class="examples">
+
+
+ <li data-description="Creating and using a simple animation.">
+ <a href="basic.html">Basic Animation</a>
+ </li>
+
+
+
+ <li data-description="The Animation Utility allows you to implement 'easing effects' — for example, when an animation gradually slows down as it nears completion, that's an easing effect known as 'ease-in'. This example shows you how to use easing effects with your animations.">
+ <a href="easing.html">Easing Effects</a>
+ </li>
+
+
+
+ <li data-description="Color animations can be effective indicators of state during the lifespan of a dynamic page. This example shows you how to animate color attributes of an element.">
+ <a href="colors.html">Animating Colors</a>
+ </li>
+
+
+
+ <li data-description="The direction attribute can be used to reverse the animation on alternate iterations.">
+ <a href="alt-iterations.html">Alternating Iterations</a>
+ </li>
+
+
+
+ <li data-description="This example shows you how to animate the xy coordinates of an element.">
+ <a href="anim-xy.html">Animating XY Position</a>
+ </li>
+
+
+
+ <li data-description="This example demonstrates animating an element along a curved path using bezier control points.">
+ <a href="curve.html">Animating Along a Curved Path</a>
+ </li>
+
+
+
+ <li data-description="The reverse attribute allows you to change the run direction of an animation.">
+ <a href="reverse.html">Reversing an Animation</a>
+ </li>
+
+
+
+ <li data-description="This example demonstrates how to use the end event.">
+ <a href="end-event.html">Using the End Event</a>
+ </li>
+
+
+
+
+
+
+
+
+ </ul>
+ </div>
+ </div>
+
+
+
+ <div class="sidebox">
+ <div class="hd">
+ <h2 class="no-toc">Examples That Use This Component</h2>
+ </div>
+
+ <div class="bd">
+ <ul class="examples">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li data-description="Working with multiple YUI instances.">
+ <a href="../yui/yui-multi.html">Multiple Instances</a>
+ </li>
+
+
+
+ <li data-description="Shows how to create a simple plugin to animate the Overlay's movement and visibility.">
+ <a href="../overlay/overlay-anim-plugin.html">Animation Plugin</a>
+ </li>
+
+
+
+ <li data-description="How to make an animated node a Drop target.">
+ <a href="../dd/anim-drop.html">Animated Drop Targets</a>
+ </li>
+
+
+ </ul>
+ </div>
+ </div>
+
+ </div>
+ </div>
+ </div>
+</div>
+
+<script src="../assets/vendor/prettify/prettify-min.js"></script>
+<script>prettyPrint();</script>
+
+<script>
+YUI.Env.Tests = {
+ examples: [],
+ project: '../assets',
+ assets: '../assets/anim',
+ name: 'reverse',
+ title: 'Reversing an Animation',
+ newWindow: '',
+ auto: false
+};
+YUI.Env.Tests.examples.push('basic');
+YUI.Env.Tests.examples.push('easing');
+YUI.Env.Tests.examples.push('colors');
+YUI.Env.Tests.examples.push('alt-iterations');
+YUI.Env.Tests.examples.push('anim-xy');
+YUI.Env.Tests.examples.push('curve');
+YUI.Env.Tests.examples.push('reverse');
+YUI.Env.Tests.examples.push('end-event');
+YUI.Env.Tests.examples.push('yui-multi');
+YUI.Env.Tests.examples.push('overlay-anim-plugin');
+YUI.Env.Tests.examples.push('anim-drop');
+
+</script>
+<script src="../assets/yui/test-runner.js"></script>
+
+
+
+</body>
+</html>