[Anark] Delayed Execution (Script Utilities Behavior)

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发表于 2011-10-20 15:42:00 |只看该作者 |倒序浏览

            Delayed Execution (Script Utilities Behavior)


         Summary


         Provides the ability to call a function after a certain delay.


            Category


            Latest Behaviors


            Author


            Gavin Kistner


            Difficulty


            (Reference)


            Time to Complete


            5 Minutes


         Downloads


         Click Here

         to download the associated files.


         (This document covers version 1.0.1 of the 'Delayed Execution' behavior, current as of 2005-Feb-11)


         Description


         This utility library adds the ability to call a function after a certain number of frames or number of seconds have passed.


         The supplied callback function will be***cuted in the scope of whatever object invoked the

            frameDelayedExecute(...)

         or

            timeDelayedExecute(...)

         methods. These methods are available on every object, including globally.


         To use, include this behavior anywhere in the scene, and then:


         frameDelayedExecute( myFunctionName, 30 );

  //function will***n in global scope 30 frames from now

  this.frameDelayedExecute( myFunctionName, 30 );

  //function will***n in the current scope

  otherObj.timeDelayedExecute( this.doStuff, 5 );

  //My method will***n in the scope of otherObj

  //in 5 seconds


         You can cancel a delayed callback by storing the return value from

            frameDelayedExecute()

         or

            timeDelayedExecute()

         , and then passing that value to

            cancelDelayedExecute()

         :


         this.delayID = this.frameDelayedExecute( 5, closeMenu );

  ...

  if ( userMovedOverMenu )

  {

cancelDelayedExecute( delayID );

  }


         Note that the

            cancelDelayedExecute()

         method is available only as a global function; each returned

            delayID

         is unique, and hence cancelling the delayed callback is not dependant upon the object whose scope it is set to***n inside of.


         If you change your mind and want the callback to***n immediately instead of later, pass ***e as a second parameter to

            cancelDelayedExecute()

         :


         cancelDelayedExecute( delayID, ***e );

//Invokes the callback immediately,

//and prevents it from being called later


         Demonstration


            View Demonstration Project


            Download Project File