Drag events for Starling objects (toggle button)

package
{
    import starling.display.DisplayObject;
    import starling.display.Sprite;
    import starling.display.graphics.RoundedRectangle;
    import starling.display.materials.FlatColorMaterial;
    import starling.display.materials.TextureMaterial;
    import starling.events.Touch;
    import starling.events.TouchEvent;
    import starling.events.TouchPhase;
    import starling.filters.DropShadowFilter;
    import starling.text.TextField;
    import starling.text.TextFormat;
    import starling.textures.Texture;
    /**
     * ...
     * @author Angel Hdz
     */
    public class ToggleButton extends Sprite
    {
        public var padding:Number = 6;
        private var bg:RoundedRectangle;
        private var button:RoundedRectangle;
        private var onTxt:TextField;
        private var offTxt:TextField;
        private var _enabled:Boolean;
        private var dragging:Boolean;

        public function ToggleButton()
        {
            super();
            this._enabled = true;

            //Textfields
            this.onTxt = new TextField(200, 36, "ON", format({"bold": "true", "font": "Verdana", "size": "26", "horizontalAlign": "left", "color": "0xffffff"}));
            this.offTxt = new TextField(200, 36, "OFF", format({"bold": "true", "font": "Verdana", "size": "26", "horizontalAlign": "left", "color": "0x002233"}));
            this.onTxt.x = 12;
            this.offTxt.x = 82;
            this.onTxt.y = this.offTxt.y = 13;

            //Background
            this.bg = new RoundedRectangle(150, 50, 1, 1, 1, 1);
            this.bg.x = this.bg.y = this.padding;
            bg.material = new FlatColorMaterial(0x009DD4);
            this.button = new RoundedRectangle(80, 62);
            this.button.material = new FlatColorMaterial(0xFF3A0D);
            this.button.x = 76;
            this.button.filter = new DropShadowFilter(2, 0.785, 0, 1);

            //Add to stage
            this.addChild(bg);
            this.addChild(this.onTxt);
            this.addChild(this.offTxt);
            this.addChild(button);

            //Add listeners
            this.button.addEventListener(TouchEvent.TOUCH, this.onTouch);
        }

        private function onTouch(event:TouchEvent):void
        {
            var target:RoundedRectangle = RoundedRectangle(event.currentTarget) || null;
            var touch:Touch = event.getTouch(event.currentTarget as DisplayObject) || null;


            if (target && touch)
            {
                var posX:Number = touch.globalX - (target.width / 2);

                switch(touch.phase)
                {
                    case TouchPhase.BEGAN:
                        this.dragging = true;
                        break;

                    case TouchPhase.ENDED:
                        this.dragging = false;
                        if (touch.globalX > (this.bg.x + (this.bg.width / 2)))
                        {
                            target.x = (this.bg.x + this.bg.width + this.padding) - target.width;
                            this.enabled = true;
                        }
                        else
                        {
                            target.x = this.bg.x - this.padding;
                            this.enabled = false;
                        }
                        break;

                    case TouchPhase.MOVED:
                        if (this.dragging)
                        {
                            target.x = (posX > (this.bg.x - this.padding) && touch.globalX < (this.bg.x + this.bg.width + this.padding - target.width/2)) ? posX : target.x;
                            //target.y = touch.globalY - (target.height/2);
                        }
                        break;
                }
            }
        }

        private function format(value:Object):TextFormat
        {
            var f:TextFormat = new TextFormat();

            for (var i:String in value)
            {
                f[i] = value[i];
            }
            return f;
        }

        /**
         * Toggles the button ON or OFF
        */
        public function set enabled(value:Boolean):void
        {
            this._enabled = value;
            this.update();
        }


        /**
         * Toggles the button ON or OFF
        */
        public function get enabled():Boolean
        {
            return this._enabled;
        }

        private function update():void
        {
            trace(this.enabled);
        }
    }
}