package
{
	import fl.controls.Button;
	import fl.core.InvalidationType;
	
	import flash.text.TextFieldAutoSize;
	
	public class AutoSizeButton extends Button
	{
		public function AutoSizeButton()
		{
			super();
		}
		
		protected var _autoSize:Boolean = true;
		/**
		 * Whether auto sizing is turned on. Default is true.
		 */
		public function get autoSize():Boolean
		{
			return _autoSize;
		}
		
		public function set autoSize(value:Boolean):void
		{
			_autoSize = value;
			textField.autoSize = _autoSize ? TextFieldAutoSize.LEFT
				: TextFieldAutoSize.NONE;
			invalidate(InvalidationType.SIZE);
		}
		
		override protected function drawLayout():void
		{
			if (autoSize)
			{
				// Set the component width by calculating
				// text & padding widths
				var txtPad:Number =
					Number(getStyleValue("textPadding"));
				_width = (textField.textWidth + 4) + (2 * txtPad);
			}
			
			super.drawLayout();
		}
		
	}
}