AS3 Textbox (fixed) class

AS3TextboxClass.as

package custUI
{
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	import flash.text.TextFieldAutoSize;
	import flash.text.TextFieldType;
	import flash.text.TextFormat;
	
	import flashx.textLayout.formats.VerticalAlign;
	
	public class Textbox extends Sprite
	{
		private var _fontSize:int = 40;
		private var _width:int = Math.round(_fontSize*10);
		private var _textFieldEntity:TextField = new TextField();
		private var _textFieldEntityText:String;;
		private var _textFieldEntityStyle:TextFormat = new TextFormat();
		private var _textFieldBorderSprite:Sprite = new Sprite();
		private var _firstClicked:Boolean = false;
		
		public function Textbox(value:String="")
		{
			super();
			_textFieldEntityText = value;
			drawEntity();
		}
		
		private function mouseDownHandler(e:MouseEvent):void{
			if( ! _firstClicked ){
				_textFieldEntity.text = "";
				_firstClicked = true;
			}
		}
		
		private function removeHandler():void{
			_textFieldEntity.removeEventListener(MouseEvent.CLICK, mouseDownHandler);
		}
		
		private function drawEntity():void{
			if(_textFieldEntityText != ""){
				_textFieldEntity.addEventListener(MouseEvent.CLICK, mouseDownHandler);
				this.addEventListener(Event.REMOVED_FROM_STAGE, removeHandler);
			}
			_textFieldEntityStyle.color = uint("0x" + "#29121c".substr(1));	
			_textFieldEntityStyle.size = _fontSize;
			_textFieldEntityStyle.leftMargin = 3;
			_textFieldEntity.border = true;
			_textFieldEntity.borderColor = uint("0x" + "#adadaf".substr(1));	
			_textFieldEntity.width = _width;
			_textFieldEntity.height = _fontSize + 10;
			_textFieldEntity.text = _textFieldEntityText;
			_textFieldEntity.type = TextFieldType.INPUT;
			_textFieldEntity.setTextFormat(_textFieldEntityStyle);
			_textFieldBorderSprite.addChild(_textFieldEntity);
			addChild(_textFieldEntity);
		}
		
		public function get text():String{
			return _textFieldEntity.text;
		}
		
		public function set text(value:String):void{
			_textFieldEntity.text = value;
		}
	}
}