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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Namespace: Observable</title>
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<h1 class="page-title">Namespace: Observable</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="fabric.html">fabric</a>.</span>Observable</h2>
</header>
<article>
<div class="container-overview">
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line186">line 186</a>
</li></ul></dd>
<dt class="tag-tutorial">Tutorials:</dt>
<dd class="tag-tutorial">
<ul>
<li><em class="disabled">Tutorial: <a href="http://fabricjs.com/fabric-intro-part-2#events">http://fabricjs.com/fabric-intro-part-2#events</a></em></li>
</ul>
</dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><a href="http://fabricjs.com/events">Events demo</a></li>
</ul>
</dd>
</dl>
</div>
<h3 class="subsection-title">Methods</h3>
<h4 class="name" id=".off"><span class="type-signature">(static) </span>off<span class="signature">(eventName, handler)</span><span class="type-signature"> → {Self}</span></h4>
<div class="description">
Stops event observing for a particular event handler. Calling this method
without arguments removes all handlers for all events
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>eventName</code></td>
<td class="type">
<span class="param-type">String</span>
|
<span class="param-type">Object</span>
</td>
<td class="description last">Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})</td>
</tr>
<tr>
<td class="name"><code>handler</code></td>
<td class="type">
<span class="param-type">function</span>
</td>
<td class="description last">Function to be deleted from EventListeners</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="important tag-deprecated">Deprecated:</dt><dd><ul class="dummy"><li>`stopObserving` deprecated since 0.8.34 (use `off` instead)</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line134">line 134</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
thisArg
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Self</span>
</dd>
</dl>
<h4 class="name" id=".on"><span class="type-signature">(static) </span>on<span class="signature">(eventName, handler)</span><span class="type-signature"> → {Self}</span></h4>
<div class="description">
Observes specified event
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>eventName</code></td>
<td class="type">
<span class="param-type">String</span>
|
<span class="param-type">Object</span>
</td>
<td class="description last">Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})</td>
</tr>
<tr>
<td class="name"><code>handler</code></td>
<td class="type">
<span class="param-type">function</span>
</td>
<td class="description last">Function that receives a notification when an event of the specified type occurs</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="important tag-deprecated">Deprecated:</dt><dd><ul class="dummy"><li>`observe` deprecated since 0.8.34 (use `on` instead)</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line104">line 104</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
thisArg
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Self</span>
</dd>
</dl>
<h4 class="name" id=".trigger"><span class="type-signature">(static) </span>trigger<span class="signature">(eventName, options<span class="signature-attributes">opt</span>)</span><span class="type-signature"> → {Self}</span></h4>
<div class="description">
Fires event with an optional options object
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>eventName</code></td>
<td class="type">
<span class="param-type">String</span>
</td>
<td class="attributes">
</td>
<td class="description last">Event name to fire</td>
</tr>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">Options object</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="important tag-deprecated">Deprecated:</dt><dd><ul class="dummy"><li>`fire` deprecated since 1.0.7 (use `trigger` instead)</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line167">line 167</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
thisArg
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Self</span>
</dd>
</dl>
</article>
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