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@vrobel
Created August 16, 2012 12:57
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Signal that notifies when target DisplayObject lands on stage dispatching target DisplayObject and Stage objets. Adding listener dispatches immidiately when target is already on stage.
/**
* Created with IntelliJ IDEA.
* User: wrobel221
* Date: 16.08.12
* Time: 14:35
* To change this template use File | Settings | File Templates.
*/
package com.blackmoondev.signals.native
{
import flash.display.DisplayObject;
import flash.events.Event;
import org.osflash.signals.ISlot;
import org.osflash.signals.natives.NativeMappedSignal;
public class StageReadySignal extends NativeMappedSignal
{
public function StageReadySignal( target : DisplayObject, listener : Function = null ) {
super( target, Event.ADDED_TO_STAGE, Event );
addOnce( listener );
}
override protected function mapEvent( eventFromTarget : Event ) : Object {
return getValueObjects()
}
private function getValueObjects() : Array {
return [_target, (_target as DisplayObject).stage];
}
private function hasStage() : Boolean {
return (_target as DisplayObject).stage != null;
}
override public function mapTo( ...rest ) : NativeMappedSignal {
throw new Error( 'You can\'t mapTo in this class. I handle it by myself' );
}
override protected function registerListenerWithPriority( listener : Function, once : Boolean = false, priority : int = 0 ) : ISlot {
var slot : ISlot = super.registerListenerWithPriority( listener, once, priority );
if ( hasStage() ) {
slot.execute( getValueObjects() );
}
return slot;
}
}
}
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