scaffold.libs_as.org.gestouch.extensions.native.NativeTouchHitTester.as Maven / Gradle / Ivy

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package org.gestouch.extensions.native
{
	import flash.display.DisplayObject;
	import flash.display.Stage;
	import flash.geom.Point;

	import org.gestouch.core.ITouchHitTester;

	/**
	 * @author Pavel fljot
	 */
	public class NativeTouchHitTester implements ITouchHitTester
	{
		private var stage : Stage;

		public function NativeTouchHitTester( stage : Stage )
		{
			if( !stage )
			{
				throw ArgumentError( "Missing stage argument." );
			}

			this.stage = stage;
		}

		public function hitTest( point : Point, possibleTarget : Object = null ) : Object
		{
			if( possibleTarget && possibleTarget is DisplayObject )
			{
				return possibleTarget;
			}

			// Fallback target detection through getObjectsUnderPoint
			return DisplayObjectUtils.getTopTarget( stage, point );
		}
	}
}