Observe Utility listen’s property changes at run time on any assigned variable and calls its defined function. This utility does the same job as ChangeWatcher or BindingUtils. I prefer using this as its very light weight, fast and handy.
package org.util
{
/**
* Detects changes to a value and runs a function in response.
* @param source: Source value that is to be watched.
* @param enabled:Prevents ObserveUtil firing before visual elements are available.
* @param handler: Function that gets called when source property gets changed.
*
* @author Chouhan
*
*/
public class ObserveUtil
{
public var handler:Function;
public var enabled:Boolean =true;
public function set source(source:*):void{
if(enabled){
handler.call();
}
}
}
}
USAGE:
<util:Observe
source="{valueThatIsToBeWatchedFor}"
handler="{valueChangedFunction}" />
private function valueChangedFunction():void{
/* Implement your logic upon property change */
}
Hope you’ve had fun using this utility. !!
