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<div class="body-wrap">
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<div class="top-tools">
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<a class="inner-link" href="#Ext.util.Observable-props"><img src="../resources/images/default/s.gif" class="item-icon icon-prop">Properties</a>
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<a class="inner-link" href="#Ext.util.Observable-methods"><img src="../resources/images/default/s.gif" class="item-icon icon-method">Methods</a>
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<a class="inner-link" href="#Ext.util.Observable-events"><img src="../resources/images/default/s.gif" class="item-icon icon-event">Events</a>
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<a class="inner-link" href="#Ext.util.Observable-configs"><img src="../resources/images/default/s.gif" class="item-icon icon-config">Config Options</a>
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<a class="bookmark" href="../docs/?class=Ext.util.Observable"><img src="../resources/images/default/s.gif" class="item-icon icon-fav">Direct Link</a>
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</div>
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<h1>Class Ext.util.Observable</h1>
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<table cellspacing="0">
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<tr><td class="label">Package:</td><td class="hd-info">Ext.util</td></tr>
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<tr><td class="label">Defined In:</td><td class="hd-info"><a href="../source/util/Observable.js" target="_blank">Observable.js</a></td></tr>
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<tr><td class="label">Class:</td><td class="hd-info">Observable</td></tr>
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<tr><td class="label">Subclasses:</td><td class="hd-info"><a ext:cls="Ext.Component" href="output/Ext.Component.html">Component</a>, <a ext:cls="Ext.Resizable" href="output/Ext.Resizable.html">Resizable</a>, <a ext:cls="Ext.SplitBar" href="output/Ext.SplitBar.html">SplitBar</a>, <a ext:cls="Ext.Updater" href="output/Ext.Updater.html">Updater</a>, <a ext:cls="Ext.air.NativeObservable" href="output/Ext.air.NativeObservable.html">NativeObservable</a>, <a ext:cls="Ext.data.Connection" href="output/Ext.data.Connection.html">Connection</a>, <a ext:cls="Ext.data.DataProxy" href="output/Ext.data.DataProxy.html">DataProxy</a>, <a ext:cls="Ext.data.Node" href="output/Ext.data.Node.html">Node</a>, <a ext:cls="Ext.data.Store" href="output/Ext.data.Store.html">Store</a>, <a ext:cls="Ext.data.Tree" href="output/Ext.data.Tree.html">Tree</a>, <a ext:cls="Ext.form.BasicForm" href="output/Ext.form.BasicForm.html">BasicForm</a>, <a ext:cls="Ext.grid.AbstractSelectionModel" href="output/Ext.grid.AbstractSelectionModel.html">AbstractSelectionModel</a>, <a ext:cls="Ext.grid.ColumnModel" href="output/Ext.grid.ColumnModel.html">ColumnModel</a>, <a ext:cls="Ext.grid.GridView" href="output/Ext.grid.GridView.html">GridView</a>, <a ext:cls="Ext.grid.PropertyStore" href="output/Ext.grid.PropertyStore.html">PropertyStore</a>, <a ext:cls="Ext.menu.Menu" href="output/Ext.menu.Menu.html">Menu</a>, <a ext:cls="Ext.tree.DefaultSelectionModel" href="output/Ext.tree.DefaultSelectionModel.html">DefaultSelectionModel</a>, <a ext:cls="Ext.tree.MultiSelectionModel" href="output/Ext.tree.MultiSelectionModel.html">MultiSelectionModel</a>, <a ext:cls="Ext.tree.TreeLoader" href="output/Ext.tree.TreeLoader.html">TreeLoader</a>, <a ext:cls="Ext.util.ClickRepeater" href="output/Ext.util.ClickRepeater.html">ClickRepeater</a>, <a ext:cls="Ext.util.MixedCollection" href="output/Ext.util.MixedCollection.html">MixedCollection</a></td></tr>
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<tr><td class="label">Extends:</td><td class="hd-info">Object</td></tr>
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</table>
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<div class="description">
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Abstract base class that provides a common interface for publishing events. Subclasses are expected to
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to have a property "events" with all the events defined.<br>
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For example:
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<pre><code>Employee = <b>function</b>(name){
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<b>this</b>.name = name;
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<b>this</b>.addEvents({
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<em>"fired"</em> : true,
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<em>"quit"</em> : true
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});
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}
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Ext.extend(Employee, Ext.util.Observable);</code></pre> </div>
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<div class="hr"></div>
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<a id="Ext.util.Observable-configs"></a>
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<h2>Config Options</h2>
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<table cellspacing="0" class="member-table">
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<tr>
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<th class="sig-header" colspan="2">Config Options</th>
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<th class="msource-header">Defined By</th>
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</tr>
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<tr class="config-row expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-listeners"></a>
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<b>listeners</b> : Object <div class="mdesc">
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<div class="short">A config object containing one or more event handlers to be added to this object during initialization. This should b...</div>
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<div class="long">
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A config object containing one or more event handlers to be added to this object during initialization. This should be a valid listeners config object as specified in the <a ext:cls="Ext.util.Observable" ext:member="addListener" href="output/Ext.util.Observable.html#addListener">addListener</a> example for attaching multiple handlers at once. </div>
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</div>
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</td>
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<td class="msource">Observable</td>
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</tr>
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</table>
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<a id="Ext.util.Observable-props"></a>
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<h2>Public Properties</h2>
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<div class="no-members">This class has no public properties.</div> <a id="Ext.util.Observable-methods"></a>
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<h2>Public Methods</h2>
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<table cellspacing="0" class="member-table">
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<tr>
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<th class="sig-header" colspan="2">Method</th>
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<th class="msource-header">Defined By</th>
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</tr>
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<tr class="method-row expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-Observable.capture"></a>
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<b>Observable.capture</b>( <code>Observable o</code>, <code>Function fn</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc">
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<div class="short"><static> Starts capture on the specified Observable. All events will be passed
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to the supplied function with th...</div>
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<div class="long">
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<static> Starts capture on the specified Observable. All events will be passed
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to the supplied function with the event name + standard signature of the event
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<b>before</b> the event is fired. If the supplied function returns false,
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the event will not fire. <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li><code>o</code> : Observable<div class="sub-desc">The Observable to capture</div></li><li><code>fn</code> : Function<div class="sub-desc">The function to call</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the fn</div></li> </ul>
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<strong>Returns:</strong>
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<ul>
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<li><code>void</code></li>
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</ul>
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</div>
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</div>
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</div>
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</td>
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<td class="msource">Observable</td>
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</tr>
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<tr class="method-row alt expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-Observable.releaseCapture"></a>
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<b>Observable.releaseCapture</b>( <code>Observable o</code> ) : void <div class="mdesc">
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<div class="short"><static> Removes <b>all</b> added captures from the Observable.</div>
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<div class="long">
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<static> Removes <b>all</b> added captures from the Observable. <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li><code>o</code> : Observable<div class="sub-desc">The Observable to release</div></li> </ul>
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<strong>Returns:</strong>
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<ul>
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<li><code>void</code></li>
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</ul>
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</div>
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</div>
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</div>
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</td>
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<td class="msource">Observable</td>
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</tr>
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<tr class="method-row expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-addEvents"></a>
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<b>addEvents</b>( <code>Object object</code> ) : void <div class="mdesc">
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<div class="short">Used to define events on this Observable</div>
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<div class="long">
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Used to define events on this Observable <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li><code>object</code> : Object<div class="sub-desc">The object with the events defined</div></li> </ul>
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<strong>Returns:</strong>
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<ul>
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<li><code>void</code></li>
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</ul>
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</div>
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</div>
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</div>
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</td>
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<td class="msource">Observable</td>
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</tr>
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<tr class="method-row alt expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-addListener"></a>
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<b>addListener</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>, <span class="optional" title="Optional">[<code>Object options</code>]</span> ) : void <div class="mdesc">
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<div class="short">Appends an event handler to this component</div>
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<div class="long">
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Appends an event handler to this component <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope in which to execute the handler
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134 |
function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration
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135 |
properties. This may contain any of the following properties:<ul>
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136 |
<li><b>scope</b> : Object<p class="sub-desc">The scope in which to execute the handler function. The handler function's "this" context.</p></li>
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<li><b>delay</b> : Number<p class="sub-desc">The number of milliseconds to delay the invocation of the handler after the event fires.</p></li>
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138 |
<li><b>single</b> : Boolean<p class="sub-desc">True to add a handler to handle just the next firing of the event, and then remove itself.</p></li>
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<li><b>buffer</b> : Number<p class="sub-desc">Causes the handler to be scheduled to run in an <a ext:cls="Ext.util.DelayedTask" href="output/Ext.util.DelayedTask.html">Ext.util.DelayedTask</a> delayed
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140 |
by the specified number of milliseconds. If the event fires again within that time, the original
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141 |
handler is <em>not</em> invoked, but the new handler is scheduled in its place.</p></li>
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142 |
</ul><br>
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<p>
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144 |
<b>Combining Options</b><br>
|
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145 |
Using the options argument, it is possible to combine different types of listeners:<br>
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146 |
<br>
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147 |
A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)
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148 |
<pre><code>el.on(<em>'click'</em>, <b>this</b>.onClick, <b>this</b>, {
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149 |
single: true,
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|
150 |
delay: 100,
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|
151 |
forumId: 4
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152 |
});</code></pre>
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153 |
<p>
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154 |
<b>Attaching multiple handlers in 1 call</b><br>
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|
155 |
The method also allows for a single argument to be passed which is a config object containing properties
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which specify multiple handlers.
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<p>
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<pre><code>foo.on({
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159 |
<em>'click'</em> : {
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160 |
fn: <b>this</b>.onClick,
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scope: <b>this</b>,
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delay: 100
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},
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<em>'mouseover'</em> : {
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fn: <b>this</b>.onMouseOver,
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scope: <b>this</b>
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},
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<em>'mouseout'</em> : {
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fn: <b>this</b>.onMouseOut,
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170 |
scope: <b>this</b>
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171 |
}
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});</code></pre>
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<p>
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|
174 |
Or a shorthand syntax:<br>
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175 |
<pre><code>foo.on({
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176 |
<em>'click'</em> : <b>this</b>.onClick,
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177 |
<em>'mouseover'</em> : <b>this</b>.onMouseOver,
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178 |
<em>'mouseout'</em> : <b>this</b>.onMouseOut,
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179 |
scope: <b>this</b>
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});</code></pre></div></li> </ul>
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<strong>Returns:</strong>
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182 |
<ul>
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183 |
<li><code>void</code></li>
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184 |
</ul>
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185 |
</div>
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186 |
</div>
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187 |
</div>
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188 |
</td>
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189 |
<td class="msource">Observable</td>
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190 |
</tr>
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191 |
<tr class="method-row expandable">
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192 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
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193 |
<td class="sig">
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194 |
<a id="Ext.util.Observable-fireEvent"></a>
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195 |
<b>fireEvent</b>( <code>String eventName</code>, <code>Object... args</code> ) : Boolean <div class="mdesc">
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|
196 |
<div class="short">Fires the specified event with the passed parameters (minus the event name).</div>
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197 |
<div class="long">
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|
198 |
Fires the specified event with the passed parameters (minus the event name). <div class="mdetail-params">
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|
199 |
<strong>Parameters:</strong>
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200 |
<ul><li><code>eventName</code> : String<div class="sub-desc"></div></li><li><code>args</code> : Object...<div class="sub-desc">Variable number of parameters are passed to handlers</div></li> </ul>
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201 |
<strong>Returns:</strong>
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202 |
<ul>
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|
203 |
<li><code>Boolean</code><div class="sub-desc">returns false if any of the handlers return false otherwise it returns true</div></li>
|
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|
204 |
</ul>
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|
205 |
</div>
|
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|
206 |
</div>
|
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|
207 |
</div>
|
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|
208 |
</td>
|
|
|
209 |
<td class="msource">Observable</td>
|
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|
210 |
</tr>
|
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|
211 |
<tr class="method-row alt expandable">
|
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|
212 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
|
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|
213 |
<td class="sig">
|
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|
214 |
<a id="Ext.util.Observable-hasListener"></a>
|
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|
215 |
<b>hasListener</b>( <code>String eventName</code> ) : Boolean <div class="mdesc">
|
|
|
216 |
<div class="short">Checks to see if this object has any listeners for a specified event</div>
|
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|
217 |
<div class="long">
|
|
|
218 |
Checks to see if this object has any listeners for a specified event <div class="mdetail-params">
|
|
|
219 |
<strong>Parameters:</strong>
|
|
|
220 |
<ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to check for</div></li> </ul>
|
|
|
221 |
<strong>Returns:</strong>
|
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|
222 |
<ul>
|
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|
223 |
<li><code>Boolean</code><div class="sub-desc">True if the event is being listened for, else false</div></li>
|
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|
224 |
</ul>
|
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|
225 |
</div>
|
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|
226 |
</div>
|
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|
227 |
</div>
|
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|
228 |
</td>
|
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|
229 |
<td class="msource">Observable</td>
|
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|
230 |
</tr>
|
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|
231 |
<tr class="method-row expandable">
|
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|
232 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
|
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|
233 |
<td class="sig">
|
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234 |
<a id="Ext.util.Observable-on"></a>
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235 |
<b>on</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>, <span class="optional" title="Optional">[<code>Object options</code>]</span> ) : void <div class="mdesc">
|
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|
236 |
<div class="short">Appends an event handler to this element (shorthand for addListener)</div>
|
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|
237 |
<div class="long">
|
|
|
238 |
Appends an event handler to this element (shorthand for addListener) <div class="mdetail-params">
|
|
|
239 |
<strong>Parameters:</strong>
|
|
|
240 |
<ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope in which to execute the handler
|
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|
241 |
function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional)</div></li> </ul>
|
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|
242 |
<strong>Returns:</strong>
|
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|
243 |
<ul>
|
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|
244 |
<li><code>void</code></li>
|
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|
245 |
</ul>
|
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|
246 |
</div>
|
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|
247 |
</div>
|
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|
248 |
</div>
|
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|
249 |
</td>
|
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|
250 |
<td class="msource">Observable</td>
|
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|
251 |
</tr>
|
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|
252 |
<tr class="method-row alt expandable">
|
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253 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
|
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|
254 |
<td class="sig">
|
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255 |
<a id="Ext.util.Observable-purgeListeners"></a>
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<b>purgeListeners</b>() : void <div class="mdesc">
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<div class="short">Removes all listeners for this object</div>
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<div class="long">
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Removes all listeners for this object <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li>None.</li> </ul>
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<strong>Returns:</strong>
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<ul>
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<li><code>void</code></li>
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</ul>
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</div>
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</div>
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</div>
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</td>
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<td class="msource">Observable</td>
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</tr>
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<tr class="method-row expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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<td class="sig">
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<a id="Ext.util.Observable-removeListener"></a>
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<b>removeListener</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc">
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<div class="short">Removes a listener</div>
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<div class="long">
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Removes a listener <div class="mdetail-params">
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<strong>Parameters:</strong>
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<ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li> </ul>
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<strong>Returns:</strong>
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<ul>
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284 |
<li><code>void</code></li>
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285 |
</ul>
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</div>
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287 |
</div>
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288 |
</div>
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289 |
</td>
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290 |
<td class="msource">Observable</td>
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291 |
</tr>
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292 |
<tr class="method-row alt expandable">
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<td class="micon"><a class="exi" href="#expand"> </a></td>
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294 |
<td class="sig">
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295 |
<a id="Ext.util.Observable-resumeEvents"></a>
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<b>resumeEvents</b>() : void <div class="mdesc">
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<div class="short">Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>)</div>
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<div class="long">
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299 |
Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>) <div class="mdetail-params">
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300 |
<strong>Parameters:</strong>
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<ul><li>None.</li> </ul>
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302 |
<strong>Returns:</strong>
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303 |
<ul>
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|
304 |
<li><code>void</code></li>
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|
305 |
</ul>
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|
306 |
</div>
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307 |
</div>
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308 |
</div>
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309 |
</td>
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|
310 |
<td class="msource">Observable</td>
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|
311 |
</tr>
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|
312 |
<tr class="method-row expandable">
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|
313 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
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|
314 |
<td class="sig">
|
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|
315 |
<a id="Ext.util.Observable-suspendEvents"></a>
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|
316 |
<b>suspendEvents</b>() : void <div class="mdesc">
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|
317 |
<div class="short">Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>)</div>
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318 |
<div class="long">
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|
319 |
Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>) <div class="mdetail-params">
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|
320 |
<strong>Parameters:</strong>
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|
321 |
<ul><li>None.</li> </ul>
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|
322 |
<strong>Returns:</strong>
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|
323 |
<ul>
|
|
|
324 |
<li><code>void</code></li>
|
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|
325 |
</ul>
|
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|
326 |
</div>
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|
327 |
</div>
|
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|
328 |
</div>
|
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|
329 |
</td>
|
|
|
330 |
<td class="msource">Observable</td>
|
|
|
331 |
</tr>
|
|
|
332 |
<tr class="method-row alt expandable">
|
|
|
333 |
<td class="micon"><a class="exi" href="#expand"> </a></td>
|
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|
334 |
<td class="sig">
|
|
|
335 |
<a id="Ext.util.Observable-un"></a>
|
|
|
336 |
<b>un</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc">
|
|
|
337 |
<div class="short">Removes a listener (shorthand for removeListener)</div>
|
|
|
338 |
<div class="long">
|
|
|
339 |
Removes a listener (shorthand for removeListener) <div class="mdetail-params">
|
|
|
340 |
<strong>Parameters:</strong>
|
|
|
341 |
<ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li> </ul>
|
|
|
342 |
<strong>Returns:</strong>
|
|
|
343 |
<ul>
|
|
|
344 |
<li><code>void</code></li>
|
|
|
345 |
</ul>
|
|
|
346 |
</div>
|
|
|
347 |
</div>
|
|
|
348 |
</div>
|
|
|
349 |
</td>
|
|
|
350 |
<td class="msource">Observable</td>
|
|
|
351 |
</tr>
|
|
|
352 |
</table>
|
|
|
353 |
<a id="Ext.util.Observable-events"></a>
|
|
|
354 |
<h2>Public Events</h2>
|
|
|
355 |
<div class="no-members">This class has no public events.</div>
|
|
|
356 |
</div>
|