+ <tr class="method-row config-row-alt1 expandable">
+ <td class="micon"><a class="exi" href="#expand"> </a></td>
+
+
+ <td class="sig">
+ <a id="Roo.util.Observable-method-addListener" name=".addListener"></a>
+ <div class="fixedFont">
+ <span class="attributes"></span><b class="itemname">addListener</b>
+
+ (<a href="./String.html#constructor" roo:cls="String.html#constructor">String</a> <B><i>eventName</i></B>, <a href="./Function.html#constructor" roo:cls="Function.html#constructor">Function</a> <B><i>handler</i></B>, <a href="http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Objects:Object">Object</a> <B><i>scope</i></B>, <a href="http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Objects:Object">Object</a> <B><i>options</i></B>)
+
+
+
+ </div>
+ <div class="mdesc">
+
+ <div class="short">Appends an event handler to this component</div>
+
+
+
+ <div class="long">
+
+ Appends an event handler to this component
+
+
+
+
+
+
+ <dl class="detailList">
+ <dt class="heading">Parameters:</dt>
+
+ <dt>
+ <span class="fixedFont"><a href="./String.html#constructor" roo:cls="String.html#constructor">String</a></span> <b>eventName</b>
+
+ </dt>
+ <dd>The type of event to listen for</dd>
+
+ <dt>
+ <span class="fixedFont"><a href="./Function.html#constructor" roo:cls="Function.html#constructor">Function</a></span> <b>handler</b>
+
+ </dt>
+ <dd>The method the event invokes</dd>
+
+ <dt>
+ <span class="fixedFont"><a href="http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Objects:Object">Object</a></span> <b>scope</b>
+
+ </dt>
+ <dd>(optional) The scope in which to execute the handler<br/>function. The handler function's "this" context.</dd>
+
+ <dt>
+ <span class="fixedFont"><a href="http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Objects:Object">Object</a></span> <b>options</b>
+
+ </dt>
+ <dd>(optional) An object containing handler configuration<br/>properties. This may contain any of the following properties:<ul><br/><li>scope {Object} The scope in which to execute the handler function. The handler function's "this" context.</li><br/><li>delay {Number} The number of milliseconds to delay the invocation of the handler after te event fires.</li><br/><li>single {Boolean} True to add a handler to handle just the next firing of the event, and then remove itself.</li><br/><li>buffer {Number} Causes the handler to be scheduled to run in an {<b>link</b> Roo.util.DelayedTask} delayed<br/>by the specified number of milliseconds. If the event fires again within that time, the original<br/>handler is <em>not</em> invoked, but the new handler is scheduled in its place.</li><br/></ul><br><br/><p><br/><b>Combining Options</b><br><br/>Using the options argument, it is possible to combine different types of listeners:<br><br/><br><br/>A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)<br/> <pre><code><br/> el.on('click', this.onClick, this, {<br/> single: true,<br/> delay: 100,<br/> forumId: 4<br/> });<br/> </code></pre><br/><p><br/><b>Attaching multiple handlers in 1 call</b><br><br/>The method also allows for a single argument to be passed which is a config object containing properties<br/>which specify multiple handlers.<br/><pre><code><br/> el.on({<br/> 'click': {<br/> fn: this.onClick,<br/> scope: this,<br/> delay: 100<br/> }, <br/> 'mouseover': {<br/> fn: this.onMouseOver,<br/> scope: this<br/> },<br/> 'mouseout': {<br/> fn: this.onMouseOut,<br/> scope: this<br/> }<br/> });<br/> </code></pre><br/><p><br/>Or a shorthand syntax which passes the same scope object to all handlers:<br/> <pre><code><br/> el.on({<br/> 'click': this.onClick,<br/> 'mouseover': this.onMouseOver,<br/> 'mouseout': this.onMouseOut,<br/> scope: this<br/> });<br/> </code></pre></dd>
+
+ </dl>
+
+
+
+
+
+
+
+
+
+
+
+ </div>
+ </div>
+
+ </td>
+ <td class="msource">
+
+ <a href="./Roo.util.Observable.html#constructor" roo:cls="Roo.util.Observable.html#constructor">Roo.util.Observable</a>
+
+ </td>
+ </tr>
+
+