FilterDemoFramework.FilterView.TouchesMoved C# (CSharp) Method

		public override void TouchesMoved (NSSet touches, UIEvent evt)
		{
			base.TouchesMoved (touches, evt);

			var firstTouch = touches.Cast<UITouch> ().FirstOrDefault ();
			if (firstTouch == null)
				return;

			var pointOfTouch = firstTouch.LocationInView (this);
			pointOfTouch.Y += bottomMargin;

			if (graphLayer.Contains (pointOfTouch)) {
				touchDown = true;
				editPoint = pointOfTouch;

				UpdateFrequenciesAndResonance ();
			}
		}