docs/output/Ext.direct.PollingProvider.html

   1 <div class="body-wrap" xmlns:ext="http://www.extjs.com"><div class="top-tools"><a class="inner-link" href="#Ext.direct.PollingProvider-props"><img src="../resources/images/default/s.gif" class="item-icon icon-prop">Properties</a>&#13;<a class="inner-link" href="#Ext.direct.PollingProvider-methods"><img src="../resources/images/default/s.gif" class="item-icon icon-method">Methods</a>&#13;<a class="inner-link" href="#Ext.direct.PollingProvider-events"><img src="../resources/images/default/s.gif" class="item-icon icon-event">Events</a>&#13;<a class="inner-link" href="#Ext.direct.PollingProvider-configs"><img src="../resources/images/default/s.gif" class="item-icon icon-config">Config Options</a>&#13;<a class="bookmark" href="../docs/?class=Ext.direct.PollingProvider"><img src="../resources/images/default/s.gif" class="item-icon icon-fav">Direct Link</a>&#13;</div><div class="inheritance res-block"><pre class="res-block-inner"><a href="output/Ext.util.Observable.html" ext:member="" ext:cls="Ext.util.Observable">Observable</a>&#13;&nbsp;&nbsp;<img src="resources/elbow-end.gif"><a href="output/Ext.direct.Provider.html" ext:member="" ext:cls="Ext.direct.Provider">Provider</a>&#13;&nbsp;&nbsp;&nbsp;&nbsp;<img src="resources/elbow-end.gif"><a href="output/Ext.direct.JsonProvider.html" ext:member="" ext:cls="Ext.direct.JsonProvider">JsonProvider</a>&#13;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="resources/elbow-end.gif">PollingProvider</pre></div><h1>Class <a href="source/PollingProvider.html#cls-Ext.direct.PollingProvider">Ext.direct.PollingProvider</a></h1><table cellspacing="0"><tr><td class="label">Package:</td><td class="hd-info">Ext.direct</td></tr><tr><td class="label">Defined In:</td><td class="hd-info"><a href="source/PollingProvider.html#cls-Ext.direct.PollingProvider">PollingProvider.js</a></td></tr><tr><td class="label">Class:</td><td class="hd-info"><a href="source/PollingProvider.html#cls-Ext.direct.PollingProvider">PollingProvider</a></td></tr><tr><td class="label">Extends:</td><td class="hd-info"><a href="output/Ext.direct.JsonProvider.html" ext:cls="Ext.direct.JsonProvider" ext:member="">JsonProvider</a></td></tr></table><div class="description"><p>Provides for repetitive polling of the server at distinct <a href="output/Ext.direct.PollingProvider.html#Ext.direct.PollingProvider-interval" ext:member="interval" ext:cls="Ext.direct.PollingProvider">intervals</a>.
   2 The initial request for data originates from the client, and then is responded to by the
   3 server.</p>
   4 <p>All configurations for the PollingProvider should be generated by the server-side
   5 API portion of the Ext.Direct stack.</p>
   6 <p>An instance of PollingProvider may be created directly via the new keyword or by simply
   7 specifying <tt>type = 'polling'</tt>.  For example:</p>
   8 <pre><code><b>var</b> pollA = <b>new</b> Ext.direct.PollingProvider({
   9     type:<em>'polling'</em>,
  10     url: <em>'php/pollA.php'</em>,
  11 });
  12 Ext.Direct.addProvider(pollA);
  13 pollA.disconnect();
  14
  15 Ext.Direct.addProvider(
  16     {
  17         type:<em>'polling'</em>,
  18         url: <em>'php/pollB.php'</em>,
  19         id: <em>'pollB-provider'</em>
  20     }
  21 );
  22 <b>var</b> pollB = Ext.Direct.getProvider(<em>'pollB-provider'</em>);</code></pre></div><div class="hr"></div><a id="Ext.direct.PollingProvider-configs"></a><h2>Config Options</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Config Options</th><th class="msource-header">Defined By</th></tr><tr class="config-row  "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-baseParams"></a><b><a href="source/PollingProvider.html#cfg-Ext.direct.PollingProvider-baseParams">baseParams</a></b> : Object<div class="mdesc">An object containing properties which are to be sent as parameters
  23 on every polling request</div></td><td class="msource">PollingProvider</td></tr><tr class="config-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-id"></a><b><a href="source/Provider.html#cfg-Ext.direct.Provider-id">id</a></b> : String<div class="mdesc"><div class="short">The unique id of the provider (defaults to an auto-assigned id).
  24 You should assign an id if you need to be able to ac...</div><div class="long">The unique id of the provider (defaults to an <a href="output/Ext.html#Ext-id" ext:member="id" ext:cls="Ext">auto-assigned id</a>).
  25 You should assign an id if you need to be able to access the provider later and you do
  26 not have an object reference available, for example:
  27 <pre><code>Ext.Direct.addProvider(
  28     {
  29         type: <em>'polling'</em>,
  30         url:  <em>'php/poll.php'</em>,
  31         id:   <em>'poll-provider'</em>
  32     }
  33 );
  34
  35 <b>var</b> p = <a href="output/Ext.Direct.html" ext:cls="Ext.Direct">Ext.Direct</a>.<a href="output/Ext.Direct.html#Ext.Direct-getProvider" ext:member="getProvider" ext:cls="Ext.Direct">getProvider</a>(<em>'poll-provider'</em>);
  36 p.disconnect();</code></pre></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#id" ext:member="#id" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="config-row  "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-interval"></a><b><a href="source/PollingProvider.html#cfg-Ext.direct.PollingProvider-interval">interval</a></b> : Number<div class="mdesc">How often to poll the server-side in milliseconds (defaults to <tt>3000</tt> - every
  37 3 seconds).</div></td><td class="msource">PollingProvider</td></tr><tr class="config-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-listeners"></a><b><a href="source/Observable.html#cfg-Ext.util.Observable-listeners">listeners</a></b> : Object<div class="mdesc"><div class="short">A config object containing one or more event handlers to be added to this
  38 object during initialization.  This should ...</div><div class="long"><p>A config object containing one or more event handlers to be added to this
  39 object during initialization.  This should be a valid listeners config object as specified in the
  40 <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> example for attaching multiple handlers at once.</p>
  41 <br><p><b><u>DOM events from ExtJs <a href="output/Ext.Component.html" ext:cls="Ext.Component">Components</a></u></b></p>
  42 <br><p>While <i>some</i> ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this
  43 is usually only done when extra value can be added. For example the <a href="output/Ext.DataView.html" ext:cls="Ext.DataView">DataView</a>'s
  44 <b><code><a href="output/Ext.DataView.html#Ext.DataView-click" ext:member="click" ext:cls="Ext.DataView">click</a></code></b> event passing the node clicked on. To access DOM
  45 events directly from a Component's HTMLElement, listeners must be added to the <i><a href="output/Ext.Component.html#Ext.Component-getEl" ext:member="getEl" ext:cls="Ext.Component">Element</a></i> after the Component
  46 has been rendered. A plugin can simplify this step:<pre><code><i>// Plugin is configured <b>with</b> a listeners config object.</i>
  47 <i>// The Component is appended to the argument list of all handler functions.</i>
  48 Ext.DomObserver = Ext.extend(Object, {
  49     constructor: <b>function</b>(config) {
  50         this.listeners = config.listeners ? config.listeners : config;
  51     },
  52
  53     <i>// Component passes itself into plugin&#39;s init method</i>
  54     init: <b>function</b>(c) {
  55         <b>var</b> p, l = this.listeners;
  56         <b>for</b> (p <b>in</b> l) {
  57             <b>if</b> (Ext.isFunction(l[p])) {
  58                 l[p] = this.createHandler(l[p], c);
  59             } <b>else</b> {
  60                 l[p].fn = this.createHandler(l[p].fn, c);
  61             }
  62         }
  63
  64         <i>// Add the listeners to the Element immediately following the render call</i>
  65         c.render = c.render.<a href="output/Function.html#Function-createSequence" ext:member="createSequence" ext:cls="Function">createSequence</a>(<b>function</b>() {
  66             <b>var</b> e = c.getEl();
  67             <b>if</b> (e) {
  68                 e.on(l);
  69             }
  70         });
  71     },
  72
  73     createHandler: <b>function</b>(fn, c) {
  74         <b>return</b> <b>function</b>(e) {
  75             fn.call(this, e, c);
  76         };
  77     }
  78 });
  79
  80 <b>var</b> combo = <b>new</b> Ext.form.ComboBox({
  81
  82     <i>// Collapse combo when its element is clicked on</i>
  83     plugins: [ <b>new</b> Ext.DomObserver({
  84         click: <b>function</b>(evt, comp) {
  85             comp.collapse();
  86         }
  87     })],
  88     store: myStore,
  89     typeAhead: true,
  90     mode: <em>'local'</em>,
  91     triggerAction: <em>'all'</em>
  92 });</code></pre></p></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#listeners" ext:member="#listeners" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="config-row  "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-priority"></a><b><a href="source/PollingProvider.html#cfg-Ext.direct.PollingProvider-priority">priority</a></b> : Number<div class="mdesc">Priority of the request (defaults to <tt>3</tt>). See <a href="output/Ext.direct.Provider.html#Ext.direct.Provider-priority" ext:member="priority" ext:cls="Ext.direct.Provider">Ext.direct.Provider.priority</a>.</div></td><td class="msource">PollingProvider</td></tr><tr class="config-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-type"></a><b><a href="source/Provider.html#cfg-Ext.direct.Provider-type">type</a></b> : String<div class="mdesc"><div class="short">Required, undefined by default.  The type of provider specified
  93 to Ext.Direct.addProvider to create a
  94 new Provider. A...</div><div class="long"><b>Required</b>, <tt>undefined</tt> by default.  The <tt>type</tt> of provider specified
  95 to <a href="output/Ext.Direct.html" ext:cls="Ext.Direct">Ext.Direct</a>.<a href="output/Ext.Direct.html#Ext.Direct-addProvider" ext:member="addProvider" ext:cls="Ext.Direct">addProvider</a> to create a
  96 new Provider. Acceptable values by default are:<div class="mdetail-params"><ul>
  97 <li><b><tt>polling</tt></b> : <a href="output/Ext.direct.PollingProvider.html" ext:cls="Ext.direct.PollingProvider">PollingProvider</a></li>
  98 <li><b><tt>remoting</tt></b> : <a href="output/Ext.direct.RemotingProvider.html" ext:cls="Ext.direct.RemotingProvider">RemotingProvider</a></li>
  99 </ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#type" ext:member="#type" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="config-row expandable "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-url"></a><b><a href="source/PollingProvider.html#cfg-Ext.direct.PollingProvider-url">url</a></b> : String/Function<div class="mdesc"><div class="short">The url which the PollingProvider should contact with each request. This can also be
 100 an imported Ext.Direct method wh...</div><div class="long">The url which the PollingProvider should contact with each request. This can also be
 101 an imported Ext.Direct method which will accept the baseParams as its only argument.</div></div></td><td class="msource">PollingProvider</td></tr></tbody></table><a id="Ext.direct.PollingProvider-props"></a><h2>Public Properties</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Property</th><th class="msource-header">Defined By</th></tr><tr class="property-row  inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-connect"></a><b><a href="source/Provider.html#prop-Ext.direct.Provider-connect">connect</a></b> : Object<div class="mdesc">Abstract methods for subclasses to implement.</div></td><td class="msource"><a href="output/Ext.direct.Provider.html#connect" ext:member="#connect" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="property-row  inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-disconnect"></a><b><a href="source/Provider.html#prop-Ext.direct.Provider-disconnect">disconnect</a></b> : Object<div class="mdesc">Abstract methods for subclasses to implement.</div></td><td class="msource"><a href="output/Ext.direct.Provider.html#disconnect" ext:member="#disconnect" ext:cls="Ext.direct.Provider">Provider</a></td></tr></tbody></table><a id="Ext.direct.PollingProvider-methods"></a><h2>Public Methods</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Method</th><th class="msource-header">Defined By</th></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-addEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-addEvents">addEvents</a></b>(&nbsp;<code>Object|String&nbsp;o</code>,&nbsp;<code>string&nbsp;Optional.</code>&nbsp;)
 102     :
 103                                         void<div class="mdesc"><div class="short">Adds the specified events to the list of events which this Observable may fire.</div><div class="long">Adds the specified events to the list of events which this Observable may fire.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>o</code> : Object|String<div class="sub-desc">Either an object with event names as properties with a value of <code>true</code>
 104 or the first event name string if multiple event names are being passed as separate parameters.</div></li><li><code>Optional.</code> : string<div class="sub-desc">Event name if multiple event names are being passed as separate parameters.
 105 Usage:<pre><code>this.addEvents(<em>'storeloaded'</em>, <em>'storecleared'</em>);</code></pre></div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#addEvents" ext:member="#addEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-addListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-addListener">addListener</a></b>(&nbsp;<code>String&nbsp;eventName</code>,&nbsp;<code>Function&nbsp;handler</code>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;scope</code>]</span>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;options</code>]</span>&nbsp;)
 106     :
 107                                         void<div class="mdesc"><div class="short">Appends an event handler to this object.</div><div class="long">Appends an event handler to this object.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The name of the 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 (<code><b>this</b></code> reference) in which the handler function is executed.
 108 <b>If omitted, defaults to the object which fired the event.</b></div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration.
 109 properties. This may contain any of the following properties:<ul>
 110 <li><b>scope</b> : Object<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the handler function is executed.
 111 <b>If omitted, defaults to the object which fired the event.</b></div></li>
 112 <li><b>delay</b> : Number<div class="sub-desc">The number of milliseconds to delay the invocation of the handler after the event fires.</div></li>
 113 <li><b>single</b> : Boolean<div class="sub-desc">True to add a handler to handle just the next firing of the event, and then remove itself.</div></li>
 114 <li><b>buffer</b> : Number<div class="sub-desc">Causes the handler to be scheduled to run in an <a href="output/Ext.util.DelayedTask.html" ext:cls="Ext.util.DelayedTask">Ext.util.DelayedTask</a> delayed
 115 by the specified number of milliseconds. If the event fires again within that time, the original
 116 handler is <em>not</em> invoked, but the new handler is scheduled in its place.</div></li>
 117 <li><b>target</b> : Observable<div class="sub-desc">Only call the handler if the event was fired on the target Observable, <i>not</i>
 118 if the event was bubbled up from a child Observable.</div></li>
 119 </ul><br>
 120 <p>
 121 <b>Combining Options</b><br>
 122 Using the options argument, it is possible to combine different types of listeners:<br>
 123 <br>
 124 A delayed, one-time listener.
 125 <pre><code>myDataView.on(<em>'click'</em>, this.onClick, this, {
 126 single: true,
 127 delay: 100
 128 });</code></pre>
 129 <p>
 130 <b>Attaching multiple handlers in 1 call</b><br>
 131 The method also allows for a single argument to be passed which is a config object containing properties
 132 which specify multiple handlers.
 133 <p>
 134 <pre><code>myGridPanel.on({
 135 <em>'click'</em> : {
 136     fn: this.onClick,
 137     scope: this,
 138     delay: 100
 139 },
 140 <em>'mouseover'</em> : {
 141     fn: this.onMouseOver,
 142     scope: this
 143 },
 144 <em>'mouseout'</em> : {
 145     fn: this.onMouseOut,
 146     scope: this
 147 }
 148 });</code></pre>
 149 <p>
 150 Or a shorthand syntax:<br>
 151 <pre><code>myGridPanel.on({
 152 <em>'click'</em> : this.onClick,
 153 <em>'mouseover'</em> : this.onMouseOver,
 154 <em>'mouseout'</em> : this.onMouseOut,
 155  scope: this
 156 });</code></pre></div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#addListener" ext:member="#addListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-connect"></a><b><a href="source/PollingProvider.html#method-Ext.direct.PollingProvider-connect">connect</a></b>()
 157     :
 158                                         void<div class="mdesc"><div class="short">Connect to the server-side and begin the polling process. To handle each
 159 response subscribe to the data event.</div><div class="long">Connect to the server-side and begin the polling process. To handle each
 160 response subscribe to the data event.<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource">PollingProvider</td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-disconnect"></a><b><a href="source/PollingProvider.html#method-Ext.direct.PollingProvider-disconnect">disconnect</a></b>()
 161     :
 162                                         void<div class="mdesc"><div class="short">Disconnect from the server-side and stop the polling process. The disconnect
 163 event will be fired on a successful disc...</div><div class="long">Disconnect from the server-side and stop the polling process. The disconnect
 164 event will be fired on a successful disconnect.<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource">PollingProvider</td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-enableBubble"></a><b><a href="source/Observable-more.html#method-Ext.util.Observable-enableBubble">enableBubble</a></b>(&nbsp;<code>String/Array&nbsp;events</code>&nbsp;)
 165     :
 166                                         void<div class="mdesc"><div class="short">Enables events fired by this Observable to bubble up an owner hierarchy by calling
 167 this.getBubbleTarget() if present....</div><div class="long"><p>Enables events fired by this Observable to bubble up an owner hierarchy by calling
 168 <code>this.getBubbleTarget()</code> if present. There is no implementation in the Observable base class.</p>
 169 <p>This is commonly used by Ext.Components to bubble events to owner Containers. See <a href="output/Ext.Component.getBubbleTarget.html" ext:cls="Ext.Component.getBubbleTarget">Ext.Component.getBubbleTarget</a>. The default
 170 implementation in Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to
 171 access the required target more quickly.</p>
 172 <p>Example:</p><pre><code>Ext.override(Ext.form.Field, {
 173     <i>//  Add functionality to Field&#39;s initComponent to enable the change event to bubble</i>
 174     initComponent : Ext.form.Field.prototype.initComponent.createSequence(<b>function</b>() {
 175         this.enableBubble(<em>'change'</em>);
 176     }),
 177
 178     <i>//  We know that we want Field&#39;s events to bubble directly to the FormPanel.</i>
 179     getBubbleTarget : <b>function</b>() {
 180         <b>if</b> (!this.formPanel) {
 181             this.formPanel = this.findParentByType(<em>'form'</em>);
 182         }
 183         <b>return</b> this.formPanel;
 184     }
 185 });
 186
 187 <b>var</b> myForm = <b>new</b> Ext.formPanel({
 188     title: <em>'User Details'</em>,
 189     items: [{
 190         ...
 191     }],
 192     listeners: {
 193         change: <b>function</b>() {
 194             <i>// Title goes red <b>if</b> form has been modified.</i>
 195             myForm.header.setStyle(<em>'color'</em>, <em>'red'</em>);
 196         }
 197     }
 198 });</code></pre><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>events</code> : String/Array<div class="sub-desc">The event name to bubble, or an Array of event names.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#enableBubble" ext:member="#enableBubble" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-fireEvent"></a><b><a href="source/Observable.html#method-Ext.util.Observable-fireEvent">fireEvent</a></b>(&nbsp;<code>String&nbsp;eventName</code>,&nbsp;<code>Object...&nbsp;args</code>&nbsp;)
 199     :
 200                                         Boolean<div class="mdesc"><div class="short">Fires the specified event with the passed parameters (minus the event name).
 201 An event may be set to bubble up an Obse...</div><div class="long"><p>Fires the specified event with the passed parameters (minus the event name).</p>
 202 <p>An event may be set to bubble up an Observable parent hierarchy (See <a href="output/Ext.Component.html#Ext.Component-getBubbleTarget" ext:member="getBubbleTarget" ext:cls="Ext.Component">Ext.Component.getBubbleTarget</a>)
 203 by calling <a href="output/Ext.util.Observable.html#Ext.util.Observable-enableBubble" ext:member="enableBubble" ext:cls="Ext.util.Observable">enableBubble</a>.</p><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to fire.</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"><a href="output/Ext.util.Observable.html#fireEvent" ext:member="#fireEvent" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-hasListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-hasListener">hasListener</a></b>(&nbsp;<code>String&nbsp;eventName</code>&nbsp;)
 204     :
 205                                         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"><a href="output/Ext.util.Observable.html#hasListener" ext:member="#hasListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-isConnected"></a><b><a href="source/Provider.html#method-Ext.direct.Provider-isConnected">isConnected</a></b>()
 206     :
 207                                         void<div class="mdesc"><div class="short">Returns whether or not the server-side is currently connected.
 208 Abstract method for subclasses to implement.</div><div class="long">Returns whether or not the server-side is currently connected.
 209 Abstract method for subclasses to implement.<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#isConnected" ext:member="#isConnected" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-on"></a><b><a href="source/Observable.html#method-Ext.util.Observable-on">on</a></b>(&nbsp;<code>String&nbsp;eventName</code>,&nbsp;<code>Function&nbsp;handler</code>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;scope</code>]</span>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;options</code>]</span>&nbsp;)
 210     :
 211                                         void<div class="mdesc"><div class="short">Appends an event handler to this object (shorthand for addListener.)</div><div class="long">Appends an event handler to this object (shorthand for <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a>.)<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 (<code><b>this</b></code> reference) in which the handler function is executed.
 212 <b>If omitted, defaults to the object which fired the event.</b></div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#on" ext:member="#on" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-purgeListeners"></a><b><a href="source/Observable.html#method-Ext.util.Observable-purgeListeners">purgeListeners</a></b>()
 213     :
 214                                         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>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#purgeListeners" ext:member="#purgeListeners" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-relayEvents"></a><b><a href="source/Observable-more.html#method-Ext.util.Observable-relayEvents">relayEvents</a></b>(&nbsp;<code>Object&nbsp;o</code>,&nbsp;<code>Array&nbsp;events</code>&nbsp;)
 215     :
 216                                         void<div class="mdesc"><div class="short">Relays selected events from the specified Observable as if the events were fired by this.</div><div class="long">Relays selected events from the specified Observable as if the events were fired by <tt><b>this</b></tt>.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>o</code> : Object<div class="sub-desc">The Observable whose events this object is to relay.</div></li><li><code>events</code> : Array<div class="sub-desc">Array of event names to relay.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#relayEvents" ext:member="#relayEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-removeListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-removeListener">removeListener</a></b>(&nbsp;<code>String&nbsp;eventName</code>,&nbsp;<code>Function&nbsp;handler</code>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;scope</code>]</span>&nbsp;)
 217     :
 218                                         void<div class="mdesc"><div class="short">Removes an event handler.</div><div class="long">Removes an event handler.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The type of event the handler was associated with.</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove. <b>This must be a reference to the function passed into the <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> call.</b></div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope originally specified for the handler.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#removeListener" ext:member="#removeListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-resumeEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-resumeEvents">resumeEvents</a></b>()
 219     :
 220                                         void<div class="mdesc"><div class="short">Resume firing events. (see suspendEvents)
 221 If events were suspended using the queueSuspended parameter, then all
 222 event...</div><div class="long">Resume firing events. (see <a href="output/Ext.util.Observable.html#Ext.util.Observable-suspendEvents" ext:member="suspendEvents" ext:cls="Ext.util.Observable">suspendEvents</a>)
 223 If events were suspended using the <tt><b>queueSuspended</b></tt> parameter, then all
 224 events fired during event suspension will be sent to any listeners now.<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#resumeEvents" ext:member="#resumeEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-suspendEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-suspendEvents">suspendEvents</a></b>(&nbsp;<code>Boolean&nbsp;queueSuspended</code>&nbsp;)
 225     :
 226                                         void<div class="mdesc"><div class="short">Suspend the firing of all events. (see resumeEvents)</div><div class="long">Suspend the firing of all events. (see <a href="output/Ext.util.Observable.html#Ext.util.Observable-resumeEvents" ext:member="resumeEvents" ext:cls="Ext.util.Observable">resumeEvents</a>)<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>queueSuspended</code> : Boolean<div class="sub-desc">Pass as true to queue up suspended events to be fired
 227 after the <a href="output/Ext.util.Observable.html#Ext.util.Observable-resumeEvents" ext:member="resumeEvents" ext:cls="Ext.util.Observable">resumeEvents</a> call instead of discarding all suspended events;</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#suspendEvents" ext:member="#suspendEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.util.Observable-un"></a><b><a href="source/Observable.html#method-Ext.util.Observable-un">un</a></b>(&nbsp;<code>String&nbsp;eventName</code>,&nbsp;<code>Function&nbsp;handler</code>,&nbsp;<span title="Optional" class="optional">[<code>Object&nbsp;scope</code>]</span>&nbsp;)
 228     :
 229                                         void<div class="mdesc"><div class="short">Removes an event handler (shorthand for removeListener.)</div><div class="long">Removes an event handler (shorthand for <a href="output/Ext.util.Observable.html#Ext.util.Observable-removeListener" ext:member="removeListener" ext:cls="Ext.util.Observable">removeListener</a>.)<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The type of event the handler was associated with.</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove. <b>This must be a reference to the function passed into the <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> call.</b></div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope originally specified for the handler.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#un" ext:member="#un" ext:cls="Ext.util.Observable">Observable</a></td></tr></tbody></table><a id="Ext.direct.PollingProvider-events"></a><h2>Public Events</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Event</th><th class="msource-header">Defined By</th></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-beforepoll"></a><b><a href="source/PollingProvider.html#event-Ext.direct.PollingProvider-beforepoll">beforepoll</a></b> :
 230                                       (&nbsp;<code>Ext.direct.PollingProvider&nbsp;</code>&nbsp;)
 231     <div class="mdesc"><div class="short">Fired immediately before a poll takes place, an event handler can return false
 232 in order to cancel the poll.</div><div class="long">Fired immediately before a poll takes place, an event handler can return false
 233 in order to cancel the poll.<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code></code> : Ext.direct.PollingProvider<div class="sub-desc"></div></li></ul></div></div></div></td><td class="msource">PollingProvider</td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-connect"></a><b><a href="source/Provider.html#event-Ext.direct.Provider-connect">connect</a></b> :
 234                                       (&nbsp;<code>Ext.direct.Provider&nbsp;provider</code>&nbsp;)
 235     <div class="mdesc"><div class="short">Fires when the Provider connects to the server-side</div><div class="long">Fires when the Provider connects to the server-side<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>provider</code> : Ext.direct.Provider<div class="sub-desc">The <a href="output/Ext.direct.Provider.html" ext:cls="Ext.direct.Provider">Provider</a>.</div></li></ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#connect" ext:member="#connect" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-data"></a><b><a href="source/Provider.html#event-Ext.direct.Provider-data">data</a></b> :
 236                                       (&nbsp;<code>Ext.direct.Provider&nbsp;provider</code>,&nbsp;<code>event&nbsp;e</code>&nbsp;)
 237     <div class="mdesc"><div class="short">Fires when the Provider receives data from the server-side</div><div class="long">Fires when the Provider receives data from the server-side<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>provider</code> : Ext.direct.Provider<div class="sub-desc">The <a href="output/Ext.direct.Provider.html" ext:cls="Ext.direct.Provider">Provider</a>.</div></li><li><code>e</code> : event<div class="sub-desc">The <a href="output/Ext.Direct.html#Ext.Direct-eventTypes" ext:member="eventTypes" ext:cls="Ext.Direct">Ext.Direct.Event type</a> that occurred.</div></li></ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#data" ext:member="#data" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-disconnect"></a><b><a href="source/Provider.html#event-Ext.direct.Provider-disconnect">disconnect</a></b> :
 238                                       (&nbsp;<code>Ext.direct.Provider&nbsp;provider</code>&nbsp;)
 239     <div class="mdesc"><div class="short">Fires when the Provider disconnects from the server-side</div><div class="long">Fires when the Provider disconnects from the server-side<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>provider</code> : Ext.direct.Provider<div class="sub-desc">The <a href="output/Ext.direct.Provider.html" ext:cls="Ext.direct.Provider">Provider</a>.</div></li></ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#disconnect" ext:member="#disconnect" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.Provider-exception"></a><b><a href="source/Provider.html#event-Ext.direct.Provider-exception">exception</a></b> :
 240                                       ()
 241     <div class="mdesc"><div class="short">Fires when the Provider receives an exception from the server-side</div><div class="long">Fires when the Provider receives an exception from the server-side<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li>None.</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.direct.Provider.html#exception" ext:member="#exception" ext:cls="Ext.direct.Provider">Provider</a></td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi">&nbsp;</a></td><td class="sig"><a id="Ext.direct.PollingProvider-poll"></a><b><a href="source/PollingProvider.html#event-Ext.direct.PollingProvider-poll">poll</a></b> :
 242                                       (&nbsp;<code>Ext.direct.PollingProvider&nbsp;</code>&nbsp;)
 243     <div class="mdesc"><div class="short">This event has not yet been implemented.</div><div class="long">This event has not yet been implemented.<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code></code> : Ext.direct.PollingProvider<div class="sub-desc"></div></li></ul></div></div></div></td><td class="msource">PollingProvider</td></tr></tbody></table></div>