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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> |
<a class="inner-link" href="#Ext.util.Observable-methods"><img src="../resources/images/default/s.gif" class="item-icon icon-method">Methods</a> |
<a class="inner-link" href="#Ext.util.Observable-events"><img src="../resources/images/default/s.gif" class="item-icon icon-event">Events</a> |
<a class="inner-link" href="#Ext.util.Observable-configs"><img src="../resources/images/default/s.gif" class="item-icon icon-config">Config Options</a> |
<a class="bookmark" href="../docs/?class=Ext.util.Observable"><img src="../resources/images/default/s.gif" class="item-icon icon-fav">Direct Link</a> |
</div> |
<h1>Class Ext.util.Observable</h1> |
<table cellspacing="0"> |
<tr><td class="label">Package:</td><td class="hd-info">Ext.util</td></tr> |
<tr><td class="label">Defined In:</td><td class="hd-info"><a href="../source/util/Observable.js" target="_blank">Observable.js</a></td></tr> |
<tr><td class="label">Class:</td><td class="hd-info">Observable</td></tr> |
<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> |
<tr><td class="label">Extends:</td><td class="hd-info">Object</td></tr> |
</table> |
<div class="description"> |
Abstract base class that provides a common interface for publishing events. Subclasses are expected to |
to have a property "events" with all the events defined.<br> |
For example: |
<pre><code>Employee = <b>function</b>(name){ |
<b>this</b>.name = name; |
<b>this</b>.addEvents({ |
<em>"fired"</em> : true, |
<em>"quit"</em> : true |
}); |
} |
Ext.extend(Employee, Ext.util.Observable);</code></pre> </div> |
|
<div class="hr"></div> |
<a id="Ext.util.Observable-configs"></a> |
<h2>Config Options</h2> |
<table cellspacing="0" class="member-table"> |
<tr> |
<th class="sig-header" colspan="2">Config Options</th> |
<th class="msource-header">Defined By</th> |
</tr> |
<tr class="config-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-listeners"></a> |
<b>listeners</b> : Object <div class="mdesc"> |
<div class="short">A config object containing one or more event handlers to be added to this object during initialization. This should b...</div> |
<div class="long"> |
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> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
</table> |
<a id="Ext.util.Observable-props"></a> |
<h2>Public Properties</h2> |
<div class="no-members">This class has no public properties.</div> <a id="Ext.util.Observable-methods"></a> |
<h2>Public Methods</h2> |
<table cellspacing="0" class="member-table"> |
<tr> |
<th class="sig-header" colspan="2">Method</th> |
<th class="msource-header">Defined By</th> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-Observable.capture"></a> |
<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"> |
<div class="short"><static> Starts capture on the specified Observable. All events will be passed |
to the supplied function with th...</div> |
<div class="long"> |
<static> Starts capture on the specified Observable. All events will be passed |
to the supplied function with the event name + standard signature of the event |
<b>before</b> the event is fired. If the supplied function returns false, |
the event will not fire. <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-Observable.releaseCapture"></a> |
<b>Observable.releaseCapture</b>( <code>Observable o</code> ) : void <div class="mdesc"> |
<div class="short"><static> Removes <b>all</b> added captures from the Observable.</div> |
<div class="long"> |
<static> Removes <b>all</b> added captures from the Observable. <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<ul><li><code>o</code> : Observable<div class="sub-desc">The Observable to release</div></li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-addEvents"></a> |
<b>addEvents</b>( <code>Object object</code> ) : void <div class="mdesc"> |
<div class="short">Used to define events on this Observable</div> |
<div class="long"> |
Used to define events on this Observable <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<ul><li><code>object</code> : Object<div class="sub-desc">The object with the events defined</div></li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-addListener"></a> |
<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"> |
<div class="short">Appends an event handler to this component</div> |
<div class="long"> |
Appends an event handler to this component <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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 |
function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration |
properties. This may contain any of the following properties:<ul> |
<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> |
<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> |
<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> |
<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 |
by the specified number of milliseconds. If the event fires again within that time, the original |
handler is <em>not</em> invoked, but the new handler is scheduled in its place.</p></li> |
</ul><br> |
<p> |
<b>Combining Options</b><br> |
Using the options argument, it is possible to combine different types of listeners:<br> |
<br> |
A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId) |
<pre><code>el.on(<em>'click'</em>, <b>this</b>.onClick, <b>this</b>, { |
single: true, |
delay: 100, |
forumId: 4 |
});</code></pre> |
<p> |
<b>Attaching multiple handlers in 1 call</b><br> |
The method also allows for a single argument to be passed which is a config object containing properties |
which specify multiple handlers. |
<p> |
<pre><code>foo.on({ |
<em>'click'</em> : { |
fn: <b>this</b>.onClick, |
scope: <b>this</b>, |
delay: 100 |
}, |
<em>'mouseover'</em> : { |
fn: <b>this</b>.onMouseOver, |
scope: <b>this</b> |
}, |
<em>'mouseout'</em> : { |
fn: <b>this</b>.onMouseOut, |
scope: <b>this</b> |
} |
});</code></pre> |
<p> |
Or a shorthand syntax:<br> |
<pre><code>foo.on({ |
<em>'click'</em> : <b>this</b>.onClick, |
<em>'mouseover'</em> : <b>this</b>.onMouseOver, |
<em>'mouseout'</em> : <b>this</b>.onMouseOut, |
scope: <b>this</b> |
});</code></pre></div></li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-fireEvent"></a> |
<b>fireEvent</b>( <code>String eventName</code>, <code>Object... args</code> ) : Boolean <div class="mdesc"> |
<div class="short">Fires the specified event with the passed parameters (minus the event name).</div> |
<div class="long"> |
Fires the specified event with the passed parameters (minus the event name). <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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> |
<strong>Returns:</strong> |
<ul> |
<li><code>Boolean</code><div class="sub-desc">returns false if any of the handlers return false otherwise it returns true</div></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-hasListener"></a> |
<b>hasListener</b>( <code>String eventName</code> ) : Boolean <div class="mdesc"> |
<div class="short">Checks to see if this object has any listeners for a specified event</div> |
<div class="long"> |
Checks to see if this object has any listeners for a specified event <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to check for</div></li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>Boolean</code><div class="sub-desc">True if the event is being listened for, else false</div></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-on"></a> |
<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"> |
<div class="short">Appends an event handler to this element (shorthand for addListener)</div> |
<div class="long"> |
Appends an event handler to this element (shorthand for addListener) <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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 |
function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional)</div></li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-purgeListeners"></a> |
<b>purgeListeners</b>() : void <div class="mdesc"> |
<div class="short">Removes all listeners for this object</div> |
<div class="long"> |
Removes all listeners for this object <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<ul><li>None.</li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-removeListener"></a> |
<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"> |
<div class="short">Removes a listener</div> |
<div class="long"> |
Removes a listener <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-resumeEvents"></a> |
<b>resumeEvents</b>() : void <div class="mdesc"> |
<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> |
<div class="long"> |
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"> |
<strong>Parameters:</strong> |
<ul><li>None.</li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-suspendEvents"></a> |
<b>suspendEvents</b>() : void <div class="mdesc"> |
<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> |
<div class="long"> |
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"> |
<strong>Parameters:</strong> |
<ul><li>None.</li> </ul> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
<tr class="method-row alt expandable"> |
<td class="micon"><a class="exi" href="#expand"> </a></td> |
<td class="sig"> |
<a id="Ext.util.Observable-un"></a> |
<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"> |
<div class="short">Removes a listener (shorthand for removeListener)</div> |
<div class="long"> |
Removes a listener (shorthand for removeListener) <div class="mdetail-params"> |
<strong>Parameters:</strong> |
<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> |
<strong>Returns:</strong> |
<ul> |
<li><code>void</code></li> |
</ul> |
</div> |
</div> |
</div> |
</td> |
<td class="msource">Observable</td> |
</tr> |
</table> |
<a id="Ext.util.Observable-events"></a> |
<h2>Public Events</h2> |
<div class="no-members">This class has no public events.</div> |
</div> |