Calling a function in an mxml file from outside

Question

I have a basic mxml app which looks like this

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" width="800" height="600">
<mx:Script>
    <![CDATA[


        public function init():void{

        }

this swf is loaded into another swf using Loader and added with addChild(loader);

i then need to call the init function from the parent swf. how can i do this? just calling

loader.content.init();

fails.

another question is, what is the exact classname of this mxml file?

thanks!

Answer 1

I would suggest using an interface instead of directly referring to the class of the application mxml.

1. Define an interface:

   package behaviors {
       interface Initialiazable 
       {
           function init():void;
       }
   }
   

2. Implement the interface in the application mxml:

   <?xml version="1.0" encoding="utf-8"?>
   <mx:Application implements="behaviors.Initialiazable"
       width="800" height="600"
       xmlns:mx="http://www.adobe.com/2006/mxml">
       <mx:Script>
           <![CDATA[
           public function init():void{
               trace("Application.init()");
           }
   

3. Loading the SWF inside other app should be something like this:

   <?xml version="1.0" encoding="utf-8"?>
   <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
       <mx:Script>
       <![CDATA[
   
       import mx.events.FlexEvent;
       import mx.managers.SystemManager;
   
       import behaviors.Initializable;
   
       private var loadedApp:Initializable;
   
       protected function handleSWFLoaderComplete(e:Event):void
       {
           // wait for the Flex application to load
           var loadedAppSystemManager:SystemManager = e.target.content as SystemManager;
           loadedAppSystemManager.addEventListener(FlexEvent.APPLICATION_COMPLETE, handleApplicationComplete);
       }
   
       protected function handleApplicationComplete(e:FlexEvent):void
       {
           // cast the loaded application to the Interface
           loadedApp = (Initializable) e.currentTarget.application;
           loadedApp.init();
       }
       ]]>
       </mx:Script>
   
       <mx:SWFLoader source="LoadedApp.swf" complete="handleSWFLoaderComplete(event)"/>
   
   </mx:Application>