| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!-- saved from url=(0014)about:internet --><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><link rel="stylesheet" href="../../style.css" type="text/css" media="screen"><link rel="stylesheet" href="../../print.css" type="text/css" media="print"><link rel="stylesheet" href="../../override.css" type="text/css"><meta name="keywords" content="OnDemandEventDispatcher,mx.utils.OnDemandEventDispatcher,addEventListener,addEventListener,adjustBrightness,adjustBrightness2,arrayValuesMatch,arraysMatch,callProperty,callProperty,clone,compare,computeDigest,convertHSBtoRGB,convertRGBtoHSB,copy,createUID,createUID,createUniqueName,createXMLDocument,dateCompare,decode,deleteProperty,deleteProperty,dispatchEvent,dispatchEvent,displayObjectToString,drawRoundRectComplex,drawRoundRectComplex2,encode,encodeBytes,encodeUTFBytes,externalToString,find,fromByteArray,fromByteArray,getArrayValues,getAttributeByQName,getClassInfo,getClassInfo,getComplexProperty,getEnumerableProperties,getFirstItem,getFullURL,getInstance,getItemIndex,getPlatforms,getPort,getProperty,getProperty,getProtocol,getServerName,getServerNameWithPort,getUID,getUnqualifiedClassName,getValue,hasEventListener,hasEventListener,hasMetadata,hasMutualTrustBetweenParentAndChild,hasProperty,hasTokens,hasUnresolvableTokens,init,init,init,insertAfter,insertBefore,isDynamicObject,isHttpURL,isHttpsURL,isSimple,isUID,isUID,isWhitespace,isWhitespace,nextName,nextNameIndex,nextValue,normalizeURL,numericCompare,objectToString,pop,propertyChangeHandler,push,qnameToString,qnamesEqual,readExternal,registerClassAliases,remove,removeEventListener,removeEventListener,repeat,replacePort,replaceProtocol,replaceTokens,reset,reset,restrict,rgbMultiply,setProperty,setProperty,setToStringExcludes,setValue,setupPropertyList,shift,stringCompare,stringToObject,substitute,substitute,toArray,toArrayInt,toArrayObject,toByteArray,toByteArray,toByteArray,toString,toString,toString,trim,trim,trimArrayElements,trimArrayElements,unshift,unwatchXML,urisEqual,valuesAreSubsetOfObject,walkDisplayObjects,watchXML,willTrigger,willTrigger,writeExternal"><title>mx.utils.OnDemandEventDispatcher</title></head><body><script language="javascript" type="text/javascript" src="../../asdoc.js"></script><script language="javascript" type="text/javascript" src="../../help.js"></script><script language="javascript" type="text/javascript" src="../../cookies.js"></script><script language="javascript" type="text/javascript"><!-- |
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| </script><table class="titleTable" cellpadding="0" cellspacing="0" id="titleTable" style="display:none"><tr><td class="titleTableTitle" align="left">Apache Flex 4.16.1 API Reference </td><td class="titleTableTopNav" align="right"><a href="../../package-summary.html" onclick="loadClassListFrame('../../all-classes.html')">All Packages</a> | <a href="../../class-summary.html" onclick="loadClassListFrame('../../all-classes.html')">All Classes</a> | <a href="../../all-index-A.html" onclick="loadClassListFrame('../../index-list.html')">Index</a> | <a id="framesLink1" href="../../index.html?mx/utils/OnDemandEventDispatcher.html&mx/utils/class-list.html">Frames</a><a id="noFramesLink1" style="display:none" href="" onclick="parent.location=document.location"> No Frames </a></td><td class="titleTableLogo" align="right" rowspan="3"><img src="../../images/logo.jpg" class="logoImage" alt="AdobeLogo" title="AdobeLogo"></td></tr><tr class="titleTableRow2"><td class="titleTableSubTitle" id="subTitle" align="left">OnDemandEventDispatcher</td><td class="titleTableSubNav" id="subNav" align="right"><a href="#methodSummary">Methods</a></td></tr><tr class="titleTableRow3"><td colspan="3"> </td></tr></table><script language="javascript" type="text/javascript" xml:space="preserve"> |
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| </script><div xmlns:fn="http://www.w3.org/2005/xpath-functions" class="MainContent"><table class="classHeaderTable" cellpadding="0" cellspacing="0"><tr><td class="classHeaderTableLabel">Package</td><td><a href="package-detail.html" onclick="javascript:loadClassListFrame('class-list.html')">mx.utils</a></td></tr><tr><td class="classHeaderTableLabel">Class</td><td class="classSignature">public class OnDemandEventDispatcher</td></tr><tr><td class="classHeaderTableLabel">Inheritance</td><td class="inheritanceList">OnDemandEventDispatcher <img src="../../images/inherit-arrow.gif" title="Inheritance" alt="Inheritance" class="inheritArrow"> Object</td></tr><tr><td class="classHeaderTableLabel">Implements</td><td> flash.events.IEventDispatcher</td></tr><tr><td class="classHeaderTableLabel">Subclasses</td><td> <a href="../../mx/collections/AsyncListView.html">AsyncListView</a>, <a href="../../spark/layouts/supportClasses/LayoutBase.html">LayoutBase</a>, <a href="../../spark/collections/NumericDataProvider.html">NumericDataProvider</a>, <a href="../../mx/states/OverrideBase.html">OverrideBase</a></td></tr></table><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p></p><p></p> |
| OnDemandEventDispatcher serves as a base class for classes that dispatch events but expect listeners |
| to be infrequent. When a class extends OnDemandEventDispatcher instead of the standard EventDispatcher, |
| it is trading off a small overhead on every single instance for a slightly larger overhead on only the instances |
| that actually have listeners attached to them. |
| |
| <p></p><br/><hr></div><a name="methodSummary"></a><div class="summarySection"><div class="summaryTableTitle">Public Methods </div><table cellspacing="0" cellpadding="3" class="summaryTable " id="summaryTableMethod"><tr><th> </th><th colspan="2">Method</th><th class="summaryTableOwnerCol">Defined By</th></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#OnDemandEventDispatcher()" class="signatureLink">OnDemandEventDispatcher</a>()</div><div class="summaryTableDescription"> |
| Constructor.</div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#addEventListener()" class="signatureLink">addEventListener</a>(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void</div><div class="summaryTableDescription"> |
| </div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#dispatchEvent()" class="signatureLink">dispatchEvent</a>(event:Event):Boolean</div><div class="summaryTableDescription"> |
| </div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#hasEventListener()" class="signatureLink">hasEventListener</a>(type:String):Boolean</div><div class="summaryTableDescription"> |
| </div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#removeEventListener()" class="signatureLink">removeEventListener</a>(type:String, listener:Function, useCapture:Boolean = false):void</div><div class="summaryTableDescription"> |
| </div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr><tr class=""><td class="summaryTablePaddingCol"> </td><td class="summaryTableInheritanceCol"> </td><td class="summaryTableSignatureCol"><div class="summarySignature"><a href="#willTrigger()" class="signatureLink">willTrigger</a>(type:String):Boolean</div><div class="summaryTableDescription"> |
| </div></td><td class="summaryTableOwnerCol">OnDemandEventDispatcher</td></tr></table></div><script language="javascript" type="text/javascript"><!-- |
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| --></script><div class="MainContent"><a name="constructorDetail"></a><div class="detailSectionHeader">Constructor Detail</div><a name="OnDemandEventDispatcher()"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">OnDemandEventDispatcher</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">Constructor</td></tr></table><div class="detailBody"><code>public function OnDemandEventDispatcher()</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p> |
| Constructor. |
| |
| </p></div><a name="methodDetail"></a><div class="detailSectionHeader">Method Detail</div><a name="addEventListener()"></a><a name="addEventListener(String,Function,Boolean,int,Boolean)"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">addEventListener</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td></tr></table><div class="detailBody"><code> public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p> |
| </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">type</span>:String</code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">listener</span>:Function</code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">useCapture</span>:Boolean</code> (default = <code>false</code>)<code></code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">priority</span>:int</code> (default = <code>0</code>)<code></code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">useWeakReference</span>:Boolean</code> (default = <code>false</code>)<code></code></td></tr></table></p></div><a name="dispatchEvent()"></a><a name="dispatchEvent(flash.events.Event)"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">dispatchEvent</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule"> </td></tr></table><div class="detailBody"><code> public function dispatchEvent(event:Event):Boolean</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p> |
| </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">event</span>:Event</code></td></tr></table></p><p></p><span class="label">Returns</span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20"></td><td><code>Boolean</code></td></tr></table></div><a name="hasEventListener()"></a><a name="hasEventListener(String)"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">hasEventListener</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule"> </td></tr></table><div class="detailBody"><code> public function hasEventListener(type:String):Boolean</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p> |
| </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">type</span>:String</code></td></tr></table></p><p></p><span class="label">Returns</span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20"></td><td><code>Boolean</code></td></tr></table></div><a name="removeEventListener()"></a><a name="removeEventListener(String,Function,Boolean)"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">removeEventListener</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule"> </td></tr></table><div class="detailBody"><code> public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p> |
| </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">type</span>:String</code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">listener</span>:Function</code></td></tr><tr><td class="paramSpacer"> </td></tr><tr><td width="20px"></td><td><code><span class="label">useCapture</span>:Boolean</code> (default = <code>false</code>)<code></code></td></tr></table></p></div><a name="willTrigger()"></a><a name="willTrigger(String)"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">willTrigger</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule"> </td></tr></table><div class="detailBody"><code> public function willTrigger(type:String):Boolean</code><p></p><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Language Version : </b></td><td>ActionScript 3.0</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Product Version : </b></td><td>Flex 3</td></tr></table><table cellpadding="0" cellspacing="0" border="0"><tr><td style="white-space:nowrap" valign="top"><b> Runtime Versions : </b></td><td>Flash Player 9, AIR 1.1</td></tr></table><p></p><p></p><p> |
| </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">type</span>:String</code></td></tr></table></p><p></p><span class="label">Returns</span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20"></td><td><code>Boolean</code></td></tr></table></div><br/><br/><hr><br/><p></p><center class="copyright"><footer>The Apache Software Foundation</footer><br/>Wed Nov 15 2017, 09:50 AM +01:00 </center></div></body></html><!--The Apache Software Foundation<br/>Wed Nov 15 2017, 09:50 AM +01:00 --> |
