package Preloader
{
    import com.greensock.*;

    import flash.display.Sprite;
    import flash.events.Event;
    import flash.text.TextFieldAutoSize;

    public class Preloader extends Sprite
    {
        // Properties
        public static const PRELOADER_GONE:String = "preloader_gone";


        private var progressBar:Sprite;
        private var counter:PreloaderCounter;

        private var _percentage:Number;

        // Constructor
        public function Preloader()
        {
            this.addEventListener(Event.ADDED_TO_STAGE, addedToStageHandler);
        }
        // Methods
        private function addedToStageHandler(e:Event):void{
            this.removeEventListener(Event.ADDED_TO_STAGE, addedToStageHandler);

            progressBar = new Sprite();
            counter = new PreloaderCounter();
            counter.txtTotal.autoSize = TextFieldAutoSize.LEFT;

            addChild(progressBar);
            addChild(counter);


        }
        private function updatePreloader():void{
            progressBar.graphics.beginFill(0x000000);
            progressBar.graphics.drawRect(0,0, stage.stageWidth * percentage, 5);
            progressBar.graphics.endFill();

            counter.txtTotal.text = String(Math.round(percentage * 100));
            counter.x = progressBar.width;
        }

        private function fadePreloader():void{
            TweenLite.to(this, .5, {alpha:0, onComplete:preloaderFadedHandler});
        }

        private function preloaderFadedHandler():void{
            dispatchEvent(new Event(PRELOADER_GONE));
        }


        // getters & Setters
        public function get percentage():Number
        {
            return _percentage;
        }

        public function set percentage(value:Number):void
        {
            _percentage = value;

            updatePreloader();
        }

    }
}